| 1 | //go:build browser |
| 2 | |
| 3 | // The landing page in a real Chromium, served as the edge serves it: |
| 4 | // the site.Build tree over the committed releases, through the same |
| 5 | // handler every www drive uses. Each drive is one journey a reader |
| 6 | // makes: a phone, a browser with scripts off, a returning visitor, a |
| 7 | // click through the sample, a copy of the install line. |
| 8 | package www_test |
| 9 | |
| 10 | import ( |
| 11 | "bytes" |
| 12 | "context" |
| 13 | "encoding/json" |
| 14 | "fmt" |
| 15 | "image" |
| 16 | imagepng "image/png" |
| 17 | "math" |
| 18 | "net/http" |
| 19 | "strings" |
| 20 | "testing" |
| 21 | "time" |
| 22 | |
| 23 | "github.com/chromedp/cdproto/browser" |
| 24 | "github.com/chromedp/cdproto/emulation" |
| 25 | "github.com/chromedp/cdproto/input" |
| 26 | cdppage "github.com/chromedp/cdproto/page" |
| 27 | "github.com/chromedp/cdproto/runtime" |
| 28 | "github.com/chromedp/chromedp" |
| 29 | |
| 30 | "amadan.net/rastrillo/fiesta/internal/axe" |
| 31 | "amadan.net/rastrillo/fiesta/internal/harness" |
| 32 | "amadan.net/rastrillo/fiesta/internal/www" |
| 33 | ) |
| 34 | |
| 35 | // siteRig boots a browser on the built site, and hands back the |
| 36 | // handler, for a drive that delays a file or reads the request log. |
| 37 | func siteRig(t *testing.T, opts ...harness.Option) (*harness.Rig, *siteHandler) { |
| 38 | t.Helper() |
| 39 | var h *siteHandler |
| 40 | rig := harness.New(t, func(string) http.Handler { |
| 41 | h = newSiteHandler(t, builtSite(t)) |
| 42 | h.noStore = true |
| 43 | return h |
| 44 | }, opts...) |
| 45 | return rig, h |
| 46 | } |
| 47 | |
| 48 | func mustRun(t *testing.T, ctx context.Context, actions ...chromedp.Action) { |
| 49 | t.Helper() |
| 50 | if err := chromedp.Run(ctx, actions...); err != nil { |
| 51 | t.Fatal(err) |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | // at evaluates a JS expression returning a JSON string into v. |
| 56 | func at(t *testing.T, ctx context.Context, js string, v any, opts ...chromedp.EvaluateOption) { |
| 57 | t.Helper() |
| 58 | var raw string |
| 59 | if err := chromedp.Run(ctx, chromedp.Evaluate(js, &raw, opts...)); err != nil { |
| 60 | t.Fatalf("evaluating: %v\n%s", err, js) |
| 61 | } |
| 62 | if err := json.Unmarshal([]byte(raw), v); err != nil { |
| 63 | t.Fatalf("decoding %q: %v", raw, err) |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | func awaitPromise(p *runtime.EvaluateParams) *runtime.EvaluateParams { return p.WithAwaitPromise(true) } |
| 68 | |
| 69 | // onNewDocument runs js in every document the page opens from now on, |
| 70 | // before any of the page's own scripts. |
| 71 | func onNewDocument(t *testing.T, ctx context.Context, js string) { |
| 72 | t.Helper() |
| 73 | mustRun(t, ctx, chromedp.ActionFunc(func(ctx context.Context) error { |
| 74 | _, err := cdppage.AddScriptToEvaluateOnNewDocument(js).Do(ctx) |
| 75 | return err |
| 76 | })) |
| 77 | } |
| 78 | |
| 79 | // soon waits up to ten seconds for sel to be visible: long enough on a |
| 80 | // loaded box, short enough that a page without the element fails by |
| 81 | // its name rather than by the test's deadline. |
| 82 | func soon(sel string) chromedp.Action { |
| 83 | return chromedp.ActionFunc(func(ctx context.Context) error { |
| 84 | ctx, cancel := context.WithTimeout(ctx, 10*time.Second) |
| 85 | defer cancel() |
| 86 | if err := chromedp.WaitVisible(sel, chromedp.ByQuery).Do(ctx); err != nil { |
| 87 | return fmt.Errorf("%s never became visible: %w", sel, err) |
| 88 | } |
| 89 | return nil |
| 90 | }) |
| 91 | } |
| 92 | |
| 93 | // open loads the English landing page at the given viewport, waits |
| 94 | // for it to load, and requires the sample to be on it: a page without |
| 95 | // the sample is not the landing page, and the drive fails here by name. |
| 96 | func open(t *testing.T, ctx context.Context, rig *harness.Rig, w, h int64) { |
| 97 | t.Helper() |
| 98 | openPath(t, ctx, rig, "/", w, h) |
| 99 | } |
| 100 | |
| 101 | // openPath is open at any path: the landing page in another language |
| 102 | // lives at /<code>/. |
| 103 | func openPath(t *testing.T, ctx context.Context, rig *harness.Rig, p string, w, h int64) { |
| 104 | t.Helper() |
| 105 | mustRun(t, ctx, chromedp.EmulateViewport(w, h), chromedp.Navigate(rig.Origin+p), chromedp.WaitReady("body"), |
| 106 | chromedp.Evaluate(`new Promise(r => document.readyState === "complete" ? r() : addEventListener("load", r, {once: true}))`, nil, awaitPromise)) |
| 107 | var present bool |
| 108 | mustRun(t, ctx, chromedp.Evaluate(`!!document.getElementById("sample")`, &present)) |
| 109 | if !present { |
| 110 | t.Fatalf("the page at %s has no #sample; this is not the landing page", p) |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | // catalog is the English catalog, for the words a drive expects to see. |
| 115 | func catalog(t *testing.T) map[string]string { |
| 116 | t.Helper() |
| 117 | s, err := www.Strings(siteSource(t).FS(), "en") |
| 118 | if err != nil { |
| 119 | t.Fatal(err) |
| 120 | } |
| 121 | return s |
| 122 | } |
| 123 | |
| 124 | // visibleJS reports, for a selector, how many matches there are and |
| 125 | // how many are rendered (have a box on the page). |
| 126 | const visibleJS = `((sel) => { const all = [...document.querySelectorAll(sel)]; return JSON.stringify({Total: all.length, Shown: all.filter(e => e.getClientRects().length > 0).length}); })` |
| 127 | |
| 128 | type shown struct{ Total, Shown int } |
| 129 | |
| 130 | func visible(t *testing.T, ctx context.Context, sel string) shown { |
| 131 | t.Helper() |
| 132 | var s shown |
| 133 | at(t, ctx, visibleJS+fmt.Sprintf("(%q)", sel), &s) |
| 134 | return s |
| 135 | } |
| 136 | |
| 137 | // themeURL is the stylesheet each theme choice loads. |
| 138 | var themeURL = map[string]string{"day": "/1/fiesta.css", "plain": "/1/fiesta-plain.css", "signal": "/1/fiesta-signal.css"} |
| 139 | |
| 140 | // chooseTheme presses one theme tab and waits for its stylesheet to be |
| 141 | // the one in effect: the link's href swapped, and a sheet at that URL |
| 142 | // with rules in document.styleSheets, which it joins only once loaded |
| 143 | // (the link's own .sheet can still be the old one meanwhile). |
| 144 | func chooseTheme(t *testing.T, ctx context.Context, theme string) { |
| 145 | t.Helper() |
| 146 | mustRun(t, ctx, soon(`.site-themebar`), |
| 147 | chromedp.Click(fmt.Sprintf(`[data-site-theme=%q]`, theme), chromedp.ByQuery)) |
| 148 | deadline := time.Now().Add(10 * time.Second) |
| 149 | for { |
| 150 | var ok bool |
| 151 | mustRun(t, ctx, chromedp.Evaluate(fmt.Sprintf(`(() => { const l = document.getElementById("site-theme"), url = %q; return !!l && l.getAttribute("href") === url && [...document.styleSheets].some(s => s.href && new URL(s.href).pathname === url && s.cssRules.length > 0); })()`, themeURL[theme]), &ok)) |
| 152 | if ok { |
| 153 | return |
| 154 | } |
| 155 | if !time.Now().Before(deadline) { |
| 156 | t.Fatalf("the %s stylesheet never became the page's theme", theme) |
| 157 | } |
| 158 | time.Sleep(50 * time.Millisecond) |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | // chooseScheme picks one scheme from the theme bar's menu, as a reader |
| 163 | // would: open the menu, press the button. |
| 164 | func chooseScheme(t *testing.T, ctx context.Context, scheme string) { |
| 165 | t.Helper() |
| 166 | btn := fmt.Sprintf(`[rst-scheme] input[value=%q] ~ button`, scheme) |
| 167 | mustRun(t, ctx, |
| 168 | chromedp.Click(`[rst-scheme] > summary`, chromedp.ByQuery), |
| 169 | soon(btn), |
| 170 | chromedp.Click(btn, chromedp.ByQuery), |
| 171 | ) |
| 172 | } |
| 173 | |
| 174 | // currentScheme is the scheme button carrying aria-current, "" for none. |
| 175 | func currentScheme(t *testing.T, ctx context.Context) string { |
| 176 | t.Helper() |
| 177 | var s string |
| 178 | mustRun(t, ctx, chromedp.Evaluate(`(() => { const b = document.querySelector("[rst-scheme] button[aria-current]"); return b ? b.form.elements.scheme.value : ""; })()`, &s)) |
| 179 | return s |
| 180 | } |
| 181 | |
| 182 | // TestTheLandingPassesAxe: the whole page, in Day, Plain and Signal, |
| 183 | // each light and dark, with the WCAG 2.2 AA tag set; then the Arabic |
| 184 | // and Japanese pages in Day, light and dark, for a right-to-left |
| 185 | // script and one with no spaces between words. Each theme is chosen |
| 186 | // from the theme bar, as a reader would, and each scheme is set on |
| 187 | // the root, the way fiesta.js sets it. |
| 188 | func TestTheLandingPassesAxe(t *testing.T) { |
| 189 | rig, _ := siteRig(t) |
| 190 | ctx, cancel := context.WithTimeout(rig.Context(), 5*time.Minute) |
| 191 | defer cancel() |
| 192 | scans, failed := 0, 0 |
| 193 | scan := func(lang, theme string) { |
| 194 | t.Helper() |
| 195 | chooseTheme(t, ctx, theme) |
| 196 | ground := map[string]string{} |
| 197 | for _, scheme := range []string{"light", "dark"} { |
| 198 | var bg string |
| 199 | mustRun(t, ctx, chromedp.Evaluate(fmt.Sprintf(`document.documentElement.setAttribute("data-theme", %q); getComputedStyle(document.body).backgroundColor`, scheme), &bg)) |
| 200 | ground[scheme] = bg |
| 201 | res, err := axe.Scan(ctx, "", axe.DefaultTags()) |
| 202 | if err != nil { |
| 203 | t.Fatalf("%s %s %s: %v", lang, theme, scheme, err) |
| 204 | } |
| 205 | scans++ |
| 206 | for _, v := range res.Violations { |
| 207 | failed++ |
| 208 | nodes := v.Nodes |
| 209 | if len(nodes) > 5 { |
| 210 | nodes = append(nodes[:5], fmt.Sprintf("… and %d more", len(v.Nodes)-5)) |
| 211 | } |
| 212 | t.Errorf("%s %s %s: %s (%s): %s\n %s", lang, theme, scheme, v.ID, v.Impact, v.Help, strings.Join(nodes, "\n ")) |
| 213 | } |
| 214 | t.Logf("%s %s %s: needs review, axe could not decide: %v", lang, theme, scheme, res.Incomplete) |
| 215 | } |
| 216 | if ground["light"] == ground["dark"] { |
| 217 | t.Fatalf("%s %s: the body paints %s under both schemes, so the flip to dark did not take", lang, theme, ground["light"]) |
| 218 | } |
| 219 | mustRun(t, ctx, chromedp.Evaluate(`document.documentElement.removeAttribute("data-theme")`, nil)) |
| 220 | } |
| 221 | open(t, ctx, rig, 1280, 900) |
| 222 | for _, theme := range []string{"day", "plain", "signal"} { |
| 223 | scan("en", theme) |
| 224 | } |
| 225 | rig.Screen("body", "the landing page") |
| 226 | for _, lang := range []string{"ar", "ja"} { |
| 227 | openPath(t, ctx, rig, pageURL(lang), 1280, 900) |
| 228 | var got string |
| 229 | mustRun(t, ctx, chromedp.Evaluate(`document.documentElement.lang`, &got)) |
| 230 | if got != lang { |
| 231 | t.Fatalf("the page at %s is in %q; want %s", pageURL(lang), got, lang) |
| 232 | } |
| 233 | scan(lang, "day") |
| 234 | rig.Screen("body", "the landing page in "+lang) |
| 235 | } |
| 236 | t.Logf("%d scans, %d violations", scans, failed) |
| 237 | } |
| 238 | |
| 239 | // measureJS reports whether the document scrolls sideways, and the |
| 240 | // elements that reach past either edge. |
| 241 | const measureJS = `(() => { |
| 242 | const de = document.documentElement; |
| 243 | const w = Math.round(de.getBoundingClientRect().width); |
| 244 | const over = []; |
| 245 | document.querySelectorAll("body *").forEach(el => { |
| 246 | const r = el.getBoundingClientRect(); |
| 247 | if (r.width === 0) return; |
| 248 | if (r.right > w + 1 || r.left < -1) { |
| 249 | const cls = (el.className || "").toString().trim().split(/\s+/)[0]; |
| 250 | over.push(el.tagName.toLowerCase() + (cls ? "." + cls : "") + " [" + Math.round(r.left) + "…" + Math.round(r.right) + "]"); |
| 251 | } |
| 252 | }); |
| 253 | return JSON.stringify({Doc: de.scrollWidth, Client: w, Body: document.body.scrollWidth, Over: over.slice(0, 8)}); |
| 254 | })()` |
| 255 | |
| 256 | // windowJS measures the sample window's own content: the window's box |
| 257 | // against the viewport, and every shown element inside it against the |
| 258 | // window's box, since the window clips its overflow and would hide a |
| 259 | // pane that reached past its edge. An element inside a box that |
| 260 | // scrolls sideways on purpose (the sidebar's row on a phone) is left |
| 261 | // to its scroller, which must itself fit. |
| 262 | const windowJS = `(() => { |
| 263 | const w = document.querySelector(".site-window"), wr = w.getBoundingClientRect(), vw = document.documentElement.clientWidth; |
| 264 | const scrolls = el => { for (let p = el.parentElement; p && p !== w; p = p.parentElement) { const o = getComputedStyle(p).overflowX; if (o === "auto" || o === "scroll") return true; } return false; }; |
| 265 | const over = []; |
| 266 | w.querySelectorAll("*").forEach(el => { |
| 267 | const r = el.getBoundingClientRect(); |
| 268 | if (r.width === 0 || scrolls(el)) return; |
| 269 | if (r.right > wr.right + 1 || r.left < wr.left - 1) { |
| 270 | const cls = (el.className || "").toString().trim().split(/\s+/)[0]; |
| 271 | over.push(el.tagName.toLowerCase() + (cls ? "." + cls : "") + " [" + Math.round(r.left) + "…" + Math.round(r.right) + "]"); |
| 272 | } |
| 273 | }); |
| 274 | return JSON.stringify({Left: wr.left, Right: wr.right, VW: vw, Over: over.slice(0, 8)}); |
| 275 | })()` |
| 276 | |
| 277 | // TestTheLandingHasNoHorizontalScrollAt320 is WCAG 1.4.10 Reflow on |
| 278 | // the landing page, in every one of its eleven languages: at a 320 |
| 279 | // CSS-pixel viewport nothing scrolls sideways, on the page as it opens |
| 280 | // and with every sample pane and every course shown, and nothing |
| 281 | // inside the sample window reaches past the window's edge, where its |
| 282 | // clipping would hide it. Each page's content is required first, so a |
| 283 | // stub with a sample and nothing else cannot pass. The bunting is |
| 284 | // allowed to be wider than the page: it is clipped by its own box, and |
| 285 | // the check is the document's scroll width, which clipping keeps. |
| 286 | func TestTheLandingHasNoHorizontalScrollAt320(t *testing.T) { |
| 287 | rig, _ := siteRig(t) |
| 288 | ctx, cancel := context.WithTimeout(rig.Context(), 5*time.Minute) |
| 289 | defer cancel() |
| 290 | mustRun(t, ctx, chromedp.ActionFunc(func(c context.Context) error { |
| 291 | return emulation.SetDeviceMetricsOverride(320, 640, 1, false).Do(c) |
| 292 | })) |
| 293 | for _, lang := range www.Languages { |
| 294 | mustRun(t, ctx, chromedp.Navigate(rig.Origin+pageURL(lang)), chromedp.WaitReady("body"), |
| 295 | chromedp.Evaluate(`new Promise(r => document.readyState === "complete" ? r() : addEventListener("load", r, {once: true}))`, nil, awaitPromise)) |
| 296 | var got string |
| 297 | mustRun(t, ctx, chromedp.Evaluate(`document.documentElement.lang`, &got)) |
| 298 | if got != lang { |
| 299 | t.Fatalf("%s: the page is in %q; want %s. This is not the landing page in %s, and measuring it would prove nothing", pageURL(lang), got, lang, lang) |
| 300 | } |
| 301 | for _, c := range []struct { |
| 302 | sel string |
| 303 | want int |
| 304 | }{ |
| 305 | {"#headline", 1}, |
| 306 | {"#install code", 1}, |
| 307 | {".site-themebar", 1}, |
| 308 | {"#sample [rst-side-nav] a", 5}, |
| 309 | {"#sample .site-pane", 5}, |
| 310 | {"#sample .site-pane h2", 5}, |
| 311 | {"#sample .site-course", 3}, |
| 312 | {"#reasons [rst-card]", 6}, |
| 313 | {"#footer nav", 4}, |
| 314 | {"#bunting svg", 1}, |
| 315 | } { |
| 316 | if s := visible(t, ctx, c.sel); s.Total != c.want { |
| 317 | t.Fatalf("%s: %s: %d on the page; want %d. This is not the landing page, and measuring it would prove nothing", pageURL(lang), c.sel, s.Total, c.want) |
| 318 | } |
| 319 | } |
| 320 | mustRun(t, ctx, soon(".site-themebar")) |
| 321 | |
| 322 | measure := func(where string) { |
| 323 | t.Helper() |
| 324 | where = lang + ", " + where |
| 325 | var page struct { |
| 326 | Doc, Client, Body int |
| 327 | Over []string |
| 328 | } |
| 329 | at(t, ctx, measureJS, &page) |
| 330 | if page.Doc > page.Client || page.Body > page.Client { |
| 331 | t.Errorf("%s: the page scrolls sideways at 320px (WCAG 1.4.10): document %dpx, body %dpx in a %dpx page\n widest: %s", |
| 332 | where, page.Doc, page.Body, page.Client, strings.Join(page.Over, "\n ")) |
| 333 | } |
| 334 | var win struct { |
| 335 | Left, Right, VW float64 |
| 336 | Over []string |
| 337 | } |
| 338 | at(t, ctx, windowJS, &win) |
| 339 | if win.Left < -1 || win.Right > win.VW+1 { |
| 340 | t.Errorf("%s: the sample window spans %.0f…%.0f in a %.0fpx viewport", where, win.Left, win.Right, win.VW) |
| 341 | } |
| 342 | if len(win.Over) > 0 { |
| 343 | t.Errorf("%s: %d element(s) inside the sample reach past the window's edge, where it clips them:\n %s", where, len(win.Over), strings.Join(win.Over, "\n ")) |
| 344 | } |
| 345 | } |
| 346 | measure("as the page opens") |
| 347 | for _, pane := range []string{"pane-guests", "pane-menu", "pane-music", "pane-settings", "pane-overview"} { |
| 348 | showPane(t, ctx, pane) |
| 349 | if p := readPanes(t, ctx); strings.Join(p.Panes, " ") != pane { |
| 350 | t.Fatalf("%s: after pressing %s the sample shows %v", lang, pane, p.Panes) |
| 351 | } |
| 352 | measure(pane) |
| 353 | if pane != "pane-menu" { |
| 354 | continue |
| 355 | } |
| 356 | for _, course := range []string{"course-mains", "course-desserts", "course-starters"} { |
| 357 | mustRun(t, ctx, chromedp.Click(fmt.Sprintf(`#sample [data-site-course][href="#%s"]`, course), chromedp.ByQuery)) |
| 358 | if p := readPanes(t, ctx); strings.Join(p.Courses, " ") != course { |
| 359 | t.Fatalf("%s: after pressing %s the Menu pane shows %v", lang, course, p.Courses) |
| 360 | } |
| 361 | measure(course) |
| 362 | } |
| 363 | } |
| 364 | rig.Screen("#sample", "the page at 320 in "+lang) |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | // rtlJS measures the top bar: the brand's box and the last item's, the |
| 369 | // document's direction, and the install code's computed direction. |
| 370 | const rtlJS = `(() => { const b = document.querySelector(".site-brand").getBoundingClientRect(), items = document.querySelectorAll(".site-nav > *"), l = items[items.length - 1].getBoundingClientRect(), code = document.querySelector("#install code"); |
| 371 | return JSON.stringify({Dir: document.documentElement.dir, BodyDir: getComputedStyle(document.body).direction, BrandLeft: b.left, BrandRight: b.right, LastLeft: l.left, LastRight: l.right, BrandTop: b.top, BrandBottom: b.bottom, LastTop: l.top, LastBottom: l.bottom, CodeDir: getComputedStyle(code).direction, CodeAttr: code.getAttribute("dir")}); })()` |
| 372 | |
| 373 | // TestArabicReadsRightToLeft: the Arabic page is dir="rtl" and lays |
| 374 | // out that way, so the top bar's brand sits to the right of its last |
| 375 | // item, by bounding box; and the install line's code stays left to |
| 376 | // right, since a URL reads that way in any language. |
| 377 | func TestArabicReadsRightToLeft(t *testing.T) { |
| 378 | rig, _ := siteRig(t) |
| 379 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 380 | defer cancel() |
| 381 | openPath(t, ctx, rig, pageURL("ar"), 1280, 900) |
| 382 | var g struct { |
| 383 | Dir, BodyDir, CodeDir, CodeAttr string |
| 384 | BrandLeft, BrandRight, LastLeft, LastRight, BrandTop, BrandBottom, LastTop, LastBottom float64 |
| 385 | } |
| 386 | at(t, ctx, rtlJS, &g) |
| 387 | if g.Dir != "rtl" || g.BodyDir != "rtl" { |
| 388 | t.Errorf("the Arabic page has dir=%q and the body's computed direction is %q; want rtl for both", g.Dir, g.BodyDir) |
| 389 | } |
| 390 | // On the same row: the two boxes overlap vertically. Their tops |
| 391 | // differ by a pixel, since Arabic and Latin glyphs sit differently |
| 392 | // in a centred flex row, so they are not compared exactly. |
| 393 | if g.BrandBottom <= g.LastTop || g.LastBottom <= g.BrandTop { |
| 394 | t.Errorf("the top bar wrapped: the brand spans y=%.0f…%.0f and the last item y=%.0f…%.0f, so left and right cannot be compared", g.BrandTop, g.BrandBottom, g.LastTop, g.LastBottom) |
| 395 | } |
| 396 | if g.BrandLeft < g.LastRight { |
| 397 | t.Errorf("the brand spans %.0f…%.0f and the top bar's last item %.0f…%.0f; right to left, the brand is to the right of everything", g.BrandLeft, g.BrandRight, g.LastLeft, g.LastRight) |
| 398 | } |
| 399 | if g.CodeAttr != "ltr" || g.CodeDir != "ltr" { |
| 400 | t.Errorf("the install code has dir=%q and a computed direction of %q; want ltr for both, so the URL reads as a URL", g.CodeAttr, g.CodeDir) |
| 401 | } |
| 402 | rig.Screen("#headline", "the Arabic page") |
| 403 | } |
| 404 | |
| 405 | // TestTheLandingReadsWithNoScript: with JavaScript off the page still |
| 406 | // reads in full: the headline, the link box, every sample pane's |
| 407 | // heading and the six reasons are on the screen; the theme bar and |
| 408 | // the Copy button are not; and submitting the sample's Settings form |
| 409 | // leaves the reader on the page, at the sample. |
| 410 | func TestTheLandingReadsWithNoScript(t *testing.T) { |
| 411 | rig, h := siteRig(t) |
| 412 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 413 | defer cancel() |
| 414 | mustRun(t, ctx, emulation.SetScriptExecutionDisabled(true), chromedp.EmulateViewport(1280, 900), |
| 415 | chromedp.Navigate(rig.Origin+"/"), soon("#reasons")) |
| 416 | var ran bool |
| 417 | mustRun(t, ctx, chromedp.Evaluate(`!!document.getElementById("site-theme")`, &ran)) |
| 418 | if ran { |
| 419 | t.Fatal("the head's script wrote the theme link; scripts are not off, and this drive proves nothing") |
| 420 | } |
| 421 | for sel, want := range map[string]int{ |
| 422 | "#headline": 1, |
| 423 | "#install code": 1, |
| 424 | "#sample .site-pane h2": 5, |
| 425 | "#reasons [rst-card]": 6, |
| 426 | } { |
| 427 | if s := visible(t, ctx, sel); s.Total != want || s.Shown != want { |
| 428 | t.Errorf("%s: %d on the page, %d shown; want %d shown with scripts off", sel, s.Total, s.Shown, want) |
| 429 | } |
| 430 | } |
| 431 | for _, sel := range []string{".site-themebar", "[rst-snippet-copy]"} { |
| 432 | if s := visible(t, ctx, sel); s.Total != 1 || s.Shown != 0 { |
| 433 | t.Errorf("%s: %d on the page, %d shown; want 1 hidden with scripts off", sel, s.Total, s.Shown) |
| 434 | } |
| 435 | } |
| 436 | h.Seen(true) |
| 437 | // The submit is a navigation to a new document. Nothing may ask the |
| 438 | // page anything until that document has loaded: a question sent |
| 439 | // while the old one is being replaced is answered "Inspected target |
| 440 | // navigated or closed", which is how this drive failed on a loaded |
| 441 | // runner when it polled the location instead. |
| 442 | loaded := navigationLoaded(ctx) |
| 443 | mustRun(t, ctx, chromedp.Click(`#pane-settings button[type="submit"]`, chromedp.ByQuery)) |
| 444 | select { |
| 445 | case <-loaded: |
| 446 | case <-time.After(30 * time.Second): |
| 447 | t.Fatal("submitting Settings with scripts off loaded no new document within 30s") |
| 448 | } |
| 449 | var loc string |
| 450 | mustRun(t, ctx, chromedp.Location(&loc), soon("#reasons")) |
| 451 | if !strings.HasPrefix(loc, rig.Origin+"/?") || !strings.HasSuffix(loc, "#sample") { |
| 452 | t.Errorf("after submitting Settings with scripts off the page is at %s; want the same page with a query, at #sample", loc) |
| 453 | } |
| 454 | for _, p := range h.Seen(false) { |
| 455 | if p != "/" && !strings.HasPrefix(p, "/1/") && !strings.HasPrefix(p, "/static/") { |
| 456 | t.Errorf("the submit asked the server for %s", p) |
| 457 | } |
| 458 | } |
| 459 | rig.Screen("#reasons", "the page after the submit") |
| 460 | } |
| 461 | |
| 462 | // navigationLoaded is closed once the main frame has navigated to a new |
| 463 | // document and that document's load event has fired, in that order: |
| 464 | // a load event of the document being left does not count. Call it |
| 465 | // before the action that navigates, so neither event can be missed. |
| 466 | func navigationLoaded(ctx context.Context) <-chan struct{} { |
| 467 | done := make(chan struct{}) |
| 468 | lctx, cancel := context.WithCancel(ctx) |
| 469 | // The listener runs on chromedp's one event goroutine, so these |
| 470 | // need no lock; fired keeps a late event after cancel from closing |
| 471 | // done twice. |
| 472 | navigated, fired := false, false |
| 473 | chromedp.ListenTarget(lctx, func(ev any) { |
| 474 | switch e := ev.(type) { |
| 475 | case *cdppage.EventFrameNavigated: |
| 476 | if e.Frame.ParentID == "" { |
| 477 | navigated = true |
| 478 | } |
| 479 | case *cdppage.EventLoadEventFired: |
| 480 | if navigated && !fired { |
| 481 | fired = true |
| 482 | cancel() |
| 483 | close(done) |
| 484 | } |
| 485 | } |
| 486 | }) |
| 487 | return done |
| 488 | } |
| 489 | |
| 490 | // firstFrameJS queues a reading from the head, before any stylesheet |
| 491 | // or script of the page's own: the first animation frame's theme |
| 492 | // variables, stylesheets, scheme and root attribute, which is what the |
| 493 | // first paint showed. |
| 494 | const firstFrameJS = `requestAnimationFrame(() => { |
| 495 | const cs = getComputedStyle(document.documentElement); |
| 496 | window.__first = { |
| 497 | Bg: cs.getPropertyValue("--rst-bg").trim(), |
| 498 | Sheets: [...document.styleSheets].map(s => s.href ? new URL(s.href).pathname : "inline"), |
| 499 | Scheme: cs.colorScheme, |
| 500 | Theme: document.documentElement.getAttribute("data-theme") || "", |
| 501 | Ready: document.readyState, |
| 502 | }; |
| 503 | })` |
| 504 | |
| 505 | type firstFrame struct { |
| 506 | Bg, Scheme, Theme, Ready string |
| 507 | Sheets []string |
| 508 | } |
| 509 | |
| 510 | func rootBg(t *testing.T, ctx context.Context) string { |
| 511 | t.Helper() |
| 512 | var bg string |
| 513 | mustRun(t, ctx, chromedp.Evaluate(`getComputedStyle(document.documentElement).getPropertyValue("--rst-bg").trim()`, &bg)) |
| 514 | return bg |
| 515 | } |
| 516 | |
| 517 | // TestTheThemeComesBackBeforeFirstPaint: a returning visitor who chose |
| 518 | // Plain sees Plain from the first frame, with the stylesheet delayed |
| 519 | // half a second by the server so a page that painted before it would |
| 520 | // be caught; Day's stylesheet is never requested. With Dark stored as |
| 521 | // well, the first frame is dark. |
| 522 | func TestTheThemeComesBackBeforeFirstPaint(t *testing.T) { |
| 523 | rig, h := siteRig(t) |
| 524 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 525 | defer cancel() |
| 526 | open(t, ctx, rig, 1280, 900) |
| 527 | day := rootBg(t, ctx) |
| 528 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.setItem("fiesta-theme", "plain"); true`, nil)) |
| 529 | h.Delay("/1/fiesta-plain.css", 500*time.Millisecond) |
| 530 | onNewDocument(t, ctx, firstFrameJS) |
| 531 | |
| 532 | h.Seen(true) |
| 533 | start := time.Now() |
| 534 | open(t, ctx, rig, 1280, 900) |
| 535 | var first firstFrame |
| 536 | mustRun(t, ctx, chromedp.Evaluate(`window.__first`, &first)) |
| 537 | // The steady state, waited for: a page that came back in Plain |
| 538 | // late would otherwise fail here, before the first frame is judged. |
| 539 | plain := rootBg(t, ctx) |
| 540 | for deadline := time.Now().Add(3 * time.Second); plain == day && time.Now().Before(deadline); plain = rootBg(t, ctx) { |
| 541 | time.Sleep(50 * time.Millisecond) |
| 542 | } |
| 543 | if plain == day || plain == "" { |
| 544 | t.Fatalf("after the reload --rst-bg is %q, the same as Day's; Plain did not come back at all", plain) |
| 545 | } |
| 546 | if first.Bg != plain { |
| 547 | t.Errorf("the first frame had --rst-bg %q (sheets %v, ready %s); want Plain's %q", first.Bg, first.Sheets, first.Ready, plain) |
| 548 | } |
| 549 | if !contains(first.Sheets, "/1/fiesta-plain.css") { |
| 550 | t.Errorf("the first frame's stylesheets were %v; Plain's was not among them", first.Sheets) |
| 551 | } |
| 552 | for _, p := range h.Seen(false) { |
| 553 | if p == "/1/fiesta.css" { |
| 554 | t.Error("Day's stylesheet was requested on a visit that had Plain stored") |
| 555 | } |
| 556 | } |
| 557 | if time.Since(start) < 500*time.Millisecond { |
| 558 | t.Errorf("the reload took %s, less than the stylesheet's delay; the delay was not in the page's way", time.Since(start)) |
| 559 | } |
| 560 | |
| 561 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.setItem("fiesta-scheme", "dark"); true`, nil)) |
| 562 | open(t, ctx, rig, 1280, 900) |
| 563 | mustRun(t, ctx, chromedp.Evaluate(`window.__first`, &first)) |
| 564 | if first.Scheme != "dark" || first.Theme != "dark" { |
| 565 | t.Errorf("with Dark stored the first frame's color-scheme was %q on data-theme=%q; want dark on dark", first.Scheme, first.Theme) |
| 566 | } |
| 567 | if first.Bg != plain { |
| 568 | t.Errorf("with Dark and Plain stored the first frame had --rst-bg %q; want Plain's %q", first.Bg, plain) |
| 569 | } |
| 570 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.clear(); true`, nil)) |
| 571 | rig.Screen("#sample", "the page in Plain, dark") |
| 572 | } |
| 573 | |
| 574 | func contains(list []string, s string) bool { |
| 575 | for _, x := range list { |
| 576 | if x == s { |
| 577 | return true |
| 578 | } |
| 579 | } |
| 580 | return false |
| 581 | } |
| 582 | |
| 583 | // throwingStorage is a localStorage that throws on every touch, as a |
| 584 | // browser with storage blocked does. |
| 585 | const throwingStorage = `Object.defineProperty(window, "localStorage", { get() { throw new Error("storage is blocked"); } });` |
| 586 | |
| 587 | // TestTheSchemeMenuMarksTheRestoredScheme: with Dark stored, a reload |
| 588 | // marks Dark current in the scheme menu. A fresh visit, a reload after |
| 589 | // choosing System, and a storage that throws each mark System. |
| 590 | func TestTheSchemeMenuMarksTheRestoredScheme(t *testing.T) { |
| 591 | rig, _ := siteRig(t) |
| 592 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 593 | defer cancel() |
| 594 | open(t, ctx, rig, 1280, 900) |
| 595 | mustRun(t, ctx, soon(".site-themebar")) |
| 596 | if got := currentScheme(t, ctx); got != "system" { |
| 597 | t.Fatalf("a fresh visit marks %q; want system", got) |
| 598 | } |
| 599 | |
| 600 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.setItem("fiesta-scheme", "dark"); true`, nil)) |
| 601 | open(t, ctx, rig, 1280, 900) |
| 602 | mustRun(t, ctx, soon(".site-themebar")) |
| 603 | if got := currentScheme(t, ctx); got != "dark" { |
| 604 | t.Errorf("with dark stored a reload marks %q; want dark", got) |
| 605 | } |
| 606 | |
| 607 | chooseScheme(t, ctx, "system") |
| 608 | open(t, ctx, rig, 1280, 900) |
| 609 | mustRun(t, ctx, soon(".site-themebar")) |
| 610 | if got := currentScheme(t, ctx); got != "system" { |
| 611 | t.Errorf("after choosing System a reload marks %q; want system", got) |
| 612 | } |
| 613 | var stored string |
| 614 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.getItem("fiesta-scheme") || ""`, &stored)) |
| 615 | if stored != "" { |
| 616 | t.Errorf("after choosing System the storage still holds %q", stored) |
| 617 | } |
| 618 | |
| 619 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.setItem("fiesta-scheme", "dark"); true`, nil)) |
| 620 | onNewDocument(t, ctx, throwingStorage) |
| 621 | open(t, ctx, rig, 1280, 900) |
| 622 | mustRun(t, ctx, soon(".site-themebar")) |
| 623 | if got := currentScheme(t, ctx); got != "system" { |
| 624 | t.Errorf("with a storage that throws the page marks %q; want system", got) |
| 625 | } |
| 626 | rig.Screen("#sample", "the page with storage blocked") |
| 627 | } |
| 628 | |
| 629 | // themeLink reads the theme stylesheet's href and the theme tab marked |
| 630 | // current. |
| 631 | func themeLink(t *testing.T, ctx context.Context) (href, current string) { |
| 632 | t.Helper() |
| 633 | var got struct{ Href, Current string } |
| 634 | at(t, ctx, `(() => { const l = document.getElementById("site-theme"), a = document.querySelector('[data-site-theme][aria-pressed="true"]'); return JSON.stringify({Href: l ? l.getAttribute("href") : "", Current: a ? a.dataset.siteTheme : ""}); })()`, &got) |
| 635 | return got.Href, got.Current |
| 636 | } |
| 637 | |
| 638 | // TestABrokenStoredThemeFallsBackToDay: a stored theme that is not |
| 639 | // day, plain or signal, and a storage that throws, both load Day's |
| 640 | // stylesheet and mark Day. The broken values include the names every |
| 641 | // object inherits, which a lookup in a plain object would accept. |
| 642 | func TestABrokenStoredThemeFallsBackToDay(t *testing.T) { |
| 643 | rig, _ := siteRig(t) |
| 644 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 645 | defer cancel() |
| 646 | open(t, ctx, rig, 1280, 900) |
| 647 | for _, stored := range []string{"bogus", "constructor", "__proto__", "toString", "DAY", ""} { |
| 648 | mustRun(t, ctx, chromedp.Evaluate(fmt.Sprintf(`localStorage.setItem("fiesta-theme", %q); true`, stored), nil)) |
| 649 | open(t, ctx, rig, 1280, 900) |
| 650 | mustRun(t, ctx, soon(".site-themebar")) |
| 651 | if href, cur := themeLink(t, ctx); href != "/1/fiesta.css" || cur != "day" { |
| 652 | t.Errorf("with %q stored the page loads %q and marks %q; want /1/fiesta.css and day", stored, href, cur) |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.setItem("fiesta-theme", "plain"); true`, nil)) |
| 657 | onNewDocument(t, ctx, throwingStorage) |
| 658 | open(t, ctx, rig, 1280, 900) |
| 659 | mustRun(t, ctx, soon(".site-themebar")) |
| 660 | if href, cur := themeLink(t, ctx); href != "/1/fiesta.css" || cur != "day" { |
| 661 | t.Errorf("with a storage that throws the page loads %q and marks %q; want /1/fiesta.css and day", href, cur) |
| 662 | } |
| 663 | rig.Screen("#sample", "the page in Day") |
| 664 | } |
| 665 | |
| 666 | // paneJS reports which sample panes and which course lists are shown, |
| 667 | // and which sidebar link and course tab are current. |
| 668 | const paneJS = `(() => JSON.stringify({ |
| 669 | Panes: [...document.querySelectorAll("#sample .site-pane")].filter(p => p.getClientRects().length > 0).map(p => p.id), |
| 670 | Current: [...document.querySelectorAll("#sample [rst-side-nav] a[aria-current]")].map(a => a.getAttribute("href")), |
| 671 | Courses: [...document.querySelectorAll("#sample .site-course")].filter(p => p.getClientRects().length > 0).map(p => p.id), |
| 672 | Tab: [...document.querySelectorAll("#sample [data-site-course][aria-current]")].map(a => a.getAttribute("href")), |
| 673 | }))()` |
| 674 | |
| 675 | type panes struct{ Panes, Current, Courses, Tab []string } |
| 676 | |
| 677 | func readPanes(t *testing.T, ctx context.Context) panes { |
| 678 | t.Helper() |
| 679 | var p panes |
| 680 | at(t, ctx, paneJS, &p) |
| 681 | return p |
| 682 | } |
| 683 | |
| 684 | // showPane presses one sidebar link of the sample. |
| 685 | func showPane(t *testing.T, ctx context.Context, id string) { |
| 686 | t.Helper() |
| 687 | mustRun(t, ctx, chromedp.Click(fmt.Sprintf(`#sample [rst-side-nav] a[href="#%s"]`, id), chromedp.ByQuery)) |
| 688 | } |
| 689 | |
| 690 | // TestEverySamplePaneAndCourseSwitches: the sample opens on Overview; |
| 691 | // pressing Menu, then Guests, shows only that pane and marks its link; |
| 692 | // each course tab shows only its course. |
| 693 | func TestEverySamplePaneAndCourseSwitches(t *testing.T) { |
| 694 | rig, _ := siteRig(t) |
| 695 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 696 | defer cancel() |
| 697 | open(t, ctx, rig, 1280, 900) |
| 698 | mustRun(t, ctx, soon(".site-themebar")) |
| 699 | if p := readPanes(t, ctx); strings.Join(p.Panes, " ") != "pane-overview" || strings.Join(p.Current, " ") != "#pane-overview" { |
| 700 | t.Fatalf("the sample opens showing %v with %v current; want pane-overview alone", p.Panes, p.Current) |
| 701 | } |
| 702 | showPane(t, ctx, "pane-menu") |
| 703 | p := readPanes(t, ctx) |
| 704 | if strings.Join(p.Panes, " ") != "pane-menu" || strings.Join(p.Current, " ") != "#pane-menu" { |
| 705 | t.Errorf("after Menu the sample shows %v with %v current; want pane-menu alone", p.Panes, p.Current) |
| 706 | } |
| 707 | if strings.Join(p.Courses, " ") != "course-starters" || strings.Join(p.Tab, " ") != "#course-starters" { |
| 708 | t.Errorf("the Menu pane opens showing courses %v with %v current; want course-starters alone", p.Courses, p.Tab) |
| 709 | } |
| 710 | for _, c := range []string{"course-mains", "course-desserts", "course-starters"} { |
| 711 | mustRun(t, ctx, chromedp.Click(fmt.Sprintf(`#sample [data-site-course][href="#%s"]`, c), chromedp.ByQuery)) |
| 712 | if p := readPanes(t, ctx); strings.Join(p.Courses, " ") != c || strings.Join(p.Tab, " ") != "#"+c { |
| 713 | t.Errorf("after the %s tab the pane shows %v with %v current; want %s alone", c, p.Courses, p.Tab, c) |
| 714 | } |
| 715 | } |
| 716 | showPane(t, ctx, "pane-guests") |
| 717 | if p := readPanes(t, ctx); strings.Join(p.Panes, " ") != "pane-guests" || strings.Join(p.Current, " ") != "#pane-guests" { |
| 718 | t.Errorf("after Guests the sample shows %v with %v current; want pane-guests alone", p.Panes, p.Current) |
| 719 | } |
| 720 | var loc string |
| 721 | mustRun(t, ctx, chromedp.Location(&loc)) |
| 722 | if loc != rig.Origin+"/" { |
| 723 | t.Errorf("switching panes moved the page to %s", loc) |
| 724 | } |
| 725 | rig.Screen("#pane-guests", "the Guests pane") |
| 726 | } |
| 727 | |
| 728 | // paneTopJS measures the pane that is showing: where it starts below |
| 729 | // the top of the column that holds every pane, and where its heading |
| 730 | // starts below the pane's own top. Both, because a gap above a pane |
| 731 | // can be its margin, outside its box, or its padding, inside it. |
| 732 | const paneTopJS = `(() => { const p = [...document.querySelectorAll("#sample .site-pane")].find(p => p.getClientRects().length > 0), c = p.parentElement.getBoundingClientRect(), r = p.getBoundingClientRect(), h = p.querySelector("h2").getBoundingClientRect(); |
| 733 | return JSON.stringify({ID: p.id, Pane: r.top - c.top, Heading: h.top - r.top}); })()` |
| 734 | |
| 735 | // TestEverySamplePaneStartsLikeTheFirst: each sample pane, shown on its |
| 736 | // own, starts its heading as high in the window as Overview does, on a |
| 737 | // desktop and on a phone. A divider written between neighbouring panes |
| 738 | // still matches when the pane before is hidden, which drew a gap and a |
| 739 | // rule above every pane but the first. |
| 740 | func TestEverySamplePaneStartsLikeTheFirst(t *testing.T) { |
| 741 | rig, _ := siteRig(t) |
| 742 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 743 | defer cancel() |
| 744 | type top struct { |
| 745 | ID string |
| 746 | Pane, Heading float64 |
| 747 | } |
| 748 | for _, w := range []int64{1280, 390} { |
| 749 | open(t, ctx, rig, w, 900) |
| 750 | mustRun(t, ctx, soon(".site-themebar")) |
| 751 | var first top |
| 752 | at(t, ctx, paneTopJS, &first) |
| 753 | if first.ID != "pane-overview" { |
| 754 | t.Fatalf("at %d the sample opens on %s; want pane-overview", w, first.ID) |
| 755 | } |
| 756 | for _, id := range []string{"pane-guests", "pane-menu", "pane-music", "pane-settings"} { |
| 757 | showPane(t, ctx, id) |
| 758 | var got top |
| 759 | at(t, ctx, paneTopJS, &got) |
| 760 | if got.ID != id { |
| 761 | t.Fatalf("at %d, after pressing %s the sample shows %s", w, id, got.ID) |
| 762 | } |
| 763 | if math.Abs(got.Pane-first.Pane) > 0.5 || math.Abs(got.Heading-first.Heading) > 0.5 { |
| 764 | t.Errorf("at %d, %s starts %.0fpx down its column with its heading %.0fpx below that; Overview starts at %.0f with its heading at %.0f", |
| 765 | w, id, got.Pane, got.Heading, first.Pane, first.Heading) |
| 766 | } |
| 767 | } |
| 768 | rig.Screen("#pane-settings", fmt.Sprintf("the last pane at %d", w)) |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | // liveText is the text of the live region inside sel. |
| 773 | func liveText(t *testing.T, ctx context.Context, sel string) string { |
| 774 | t.Helper() |
| 775 | var s string |
| 776 | mustRun(t, ctx, chromedp.Evaluate(fmt.Sprintf(`(() => { const l = document.querySelector(%q + " .site-live"); return l ? l.textContent : ""; })()`, sel), &s)) |
| 777 | return s |
| 778 | } |
| 779 | |
| 780 | // TestTheSampleFormsStayOnThePage: submitting Settings and Search |
| 781 | // changes no URL, makes no request, and announces the local message |
| 782 | // in each form's live region. |
| 783 | func TestTheSampleFormsStayOnThePage(t *testing.T) { |
| 784 | rig, h := siteRig(t) |
| 785 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 786 | defer cancel() |
| 787 | open(t, ctx, rig, 1280, 900) |
| 788 | mustRun(t, ctx, soon(".site-themebar")) |
| 789 | words := catalog(t) |
| 790 | h.Seen(true) |
| 791 | |
| 792 | showPane(t, ctx, "pane-settings") |
| 793 | if got := liveText(t, ctx, "#pane-settings"); got != "" { |
| 794 | t.Fatalf("the Settings live region already says %q", got) |
| 795 | } |
| 796 | mustRun(t, ctx, chromedp.Click(`#pane-settings button[type="submit"]`, chromedp.ByQuery), chromedp.Sleep(200*time.Millisecond)) |
| 797 | if got := liveText(t, ctx, "#pane-settings"); got != words["sample.saved"] { |
| 798 | t.Errorf("after Save the live region says %q; want %q", got, words["sample.saved"]) |
| 799 | } |
| 800 | |
| 801 | showPane(t, ctx, "pane-guests") |
| 802 | mustRun(t, ctx, chromedp.Click(`#pane-guests input[type="search"]`, chromedp.ByQuery), |
| 803 | chromedp.SendKeys(`#pane-guests input[type="search"]`, "Ana\n", chromedp.ByQuery), chromedp.Sleep(200*time.Millisecond)) |
| 804 | if got := liveText(t, ctx, "#pane-guests"); got != words["sample.searched"] { |
| 805 | t.Errorf("after a search the live region says %q; want %q", got, words["sample.searched"]) |
| 806 | } |
| 807 | |
| 808 | var loc string |
| 809 | mustRun(t, ctx, chromedp.Location(&loc)) |
| 810 | if loc != rig.Origin+"/" { |
| 811 | t.Errorf("the submits moved the page to %s", loc) |
| 812 | } |
| 813 | if seen := h.Seen(false); len(seen) > 0 { |
| 814 | t.Errorf("the submits made %d request(s): %v", len(seen), seen) |
| 815 | } |
| 816 | var roles int |
| 817 | mustRun(t, ctx, chromedp.Evaluate(`document.querySelectorAll('#sample .site-live[role="status"]').length`, &roles)) |
| 818 | if roles < 2 { |
| 819 | t.Errorf("%d live regions in the sample carry role=status; want one per form", roles) |
| 820 | } |
| 821 | rig.Screen("#pane-guests", "the Guests pane after a search") |
| 822 | } |
| 823 | |
| 824 | // switchJS reads the sample's switch: its checkbox, the change events |
| 825 | // since the page counted, the knob's translateX, its track's box and |
| 826 | // the knob's travel, as check's drive reads them. |
| 827 | const switchJS = `((id) => { const l = document.getElementById(id), t = l.querySelector("[rst-switch-track]"), a = getComputedStyle(t, "::after"); |
| 828 | const m = new DOMMatrix(a.transform === "none" ? "" : a.transform), r = t.getBoundingClientRect(); |
| 829 | return JSON.stringify({Checked: l.querySelector("input").checked, Changes: (window.changes || {})[id] || 0, Dragging: l.hasAttribute("data-rst-drag"), |
| 830 | X: m.m41, L: r.left, R: r.right, Y: r.top + r.height / 2, K: parseFloat(a.width), Run: r.width - r.height}); })` |
| 831 | |
| 832 | type switchReading struct { |
| 833 | Checked, Dragging bool |
| 834 | Changes int |
| 835 | X, L, R, Y, K, Run float64 |
| 836 | } |
| 837 | |
| 838 | func readSwitch(t *testing.T, ctx context.Context, id string) switchReading { |
| 839 | t.Helper() |
| 840 | var s switchReading |
| 841 | at(t, ctx, switchJS+fmt.Sprintf("(%q)", id), &s) |
| 842 | return s |
| 843 | } |
| 844 | |
| 845 | // TestTheSampleSwitchDrags: the sample's reminders switch, on to begin |
| 846 | // with, can be dragged off: the knob follows the pointer and on release |
| 847 | // snaps to the off end, with one change event. check's drag journey, |
| 848 | // on the landing page's own markup through the release's fiesta.js. |
| 849 | func TestTheSampleSwitchDrags(t *testing.T) { |
| 850 | rig, _ := siteRig(t) |
| 851 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 852 | defer cancel() |
| 853 | open(t, ctx, rig, 1280, 900) |
| 854 | mustRun(t, ctx, soon(".site-themebar")) |
| 855 | showPane(t, ctx, "pane-guests") |
| 856 | const id = "sample-reminders" |
| 857 | // The switch is below the fold of a 900px viewport; a press at its |
| 858 | // box would land on nothing until it is scrolled on screen. |
| 859 | mustRun(t, ctx, chromedp.Evaluate(`window.changes = {}; document.addEventListener("change", e => { const l = e.target.closest("[rst-switch]"); if (l) window.changes[l.id] = (window.changes[l.id] || 0) + 1; }); true`, nil), |
| 860 | chromedp.ScrollIntoView("#"+id, chromedp.ByQuery), chromedp.Sleep(100*time.Millisecond)) |
| 861 | s := readSwitch(t, ctx, id) |
| 862 | if !s.Checked || s.Run <= 0 { |
| 863 | t.Fatalf("the switch starts checked=%v with a travel of %.1f; the drag below proves nothing", s.Checked, s.Run) |
| 864 | } |
| 865 | mouse := func(typ input.MouseType, x, y float64) chromedp.Action { |
| 866 | return input.DispatchMouseEvent(typ, x, y).WithButton(input.Left).WithClickCount(1) |
| 867 | } |
| 868 | // On, the knob rests at the inline end: 2px in, half a knob back. |
| 869 | x := s.R - 2 - s.K/2 |
| 870 | mustRun(t, ctx, mouse(input.MousePressed, x, s.Y)) |
| 871 | for _, o := range []float64{0.2, 0.4, 0.6, 0.8} { |
| 872 | mustRun(t, ctx, mouse(input.MouseMoved, x-o*s.Run, s.Y)) |
| 873 | } |
| 874 | mid := readSwitch(t, ctx, id) |
| 875 | if !mid.Dragging || mid.X > 0.3*s.Run { |
| 876 | t.Errorf("80%% into a drag off, the knob is at %.1f (dragging %v); it should follow the pointer to about %.1f", mid.X, mid.Dragging, 0.2*s.Run) |
| 877 | } |
| 878 | mustRun(t, ctx, mouse(input.MouseReleased, x-0.8*s.Run, s.Y), chromedp.Sleep(350*time.Millisecond)) |
| 879 | if s := readSwitch(t, ctx, id); s.Checked || s.Changes != 1 || s.X > 0.5 || s.Dragging { |
| 880 | t.Errorf("released past the middle: checked %v, %d change events, knob at %.1f; want off, one event, at 0", s.Checked, s.Changes, s.X) |
| 881 | } |
| 882 | rig.Screen("#pane-guests", "the Guests pane after the drag") |
| 883 | } |
| 884 | |
| 885 | // copyJS reads the Copy button and its live region. |
| 886 | const copyJS = `(() => { const b = document.querySelector("[rst-snippet-copy]"), l = document.querySelector("#install [rst-snippet-status]"); |
| 887 | return JSON.stringify({Present: !!b, Shown: !!b && b.getClientRects().length > 0, Label: b ? b.textContent.trim() : "", Live: l ? l.textContent : "", Role: l ? l.getAttribute("role") : "", Selected: getSelection().toString()}); })()` |
| 888 | |
| 889 | type copyReading struct { |
| 890 | Present, Shown bool |
| 891 | Label, Live, Role, Selected string |
| 892 | } |
| 893 | |
| 894 | func readCopy(t *testing.T, ctx context.Context) copyReading { |
| 895 | t.Helper() |
| 896 | var c copyReading |
| 897 | at(t, ctx, copyJS, &c) |
| 898 | return c |
| 899 | } |
| 900 | |
| 901 | // TestCopy: a granted clipboard takes the link, twice in a row, with |
| 902 | // the label reading Copied for a moment and the live region saying |
| 903 | // so; a clipboard that refuses leaves the link selected and the live |
| 904 | // region saying the copy failed; with no clipboard API the button |
| 905 | // stays hidden; and every announcement goes through a status region. |
| 906 | func TestCopy(t *testing.T) { |
| 907 | rig, _ := siteRig(t) |
| 908 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 909 | defer cancel() |
| 910 | words := catalog(t) |
| 911 | // The clipboard API refuses a document without focus, and a |
| 912 | // headless page has none unless the browser is told it does. |
| 913 | mustRun(t, ctx, browser.GrantPermissions([]browser.PermissionType{browser.PermissionTypeClipboardReadWrite, browser.PermissionTypeClipboardSanitizedWrite}).WithOrigin(rig.Origin), |
| 914 | emulation.SetFocusEmulationEnabled(true)) |
| 915 | open(t, ctx, rig, 1280, 900) |
| 916 | mustRun(t, ctx, soon("[rst-snippet-copy]")) |
| 917 | |
| 918 | t.Run("granted", func(t *testing.T) { |
| 919 | for i := 1; i <= 2; i++ { |
| 920 | mustRun(t, ctx, chromedp.Evaluate(`navigator.clipboard.writeText("")`, nil, awaitPromise), |
| 921 | chromedp.Click("[rst-snippet-copy]", chromedp.ByQuery), chromedp.Sleep(200*time.Millisecond)) |
| 922 | var held string |
| 923 | mustRun(t, ctx, chromedp.Evaluate(`navigator.clipboard.readText()`, &held, awaitPromise)) |
| 924 | if held != installLink { |
| 925 | t.Errorf("copy %d: the clipboard holds %q; want the link tag", i, held) |
| 926 | } |
| 927 | if c := readCopy(t, ctx); c.Label != words["copied"] || c.Live != words["copied"] || c.Role != "status" { |
| 928 | t.Errorf("copy %d: the label reads %q and the live region (role %q) says %q; want %q in both, in a status region", i, c.Label, c.Role, c.Live, words["copied"]) |
| 929 | } |
| 930 | if i == 1 { |
| 931 | mustRun(t, ctx, chromedp.Sleep(2200*time.Millisecond)) |
| 932 | if c := readCopy(t, ctx); c.Label != words["copy"] { |
| 933 | t.Errorf("two seconds on, the label reads %q; want %q back", c.Label, words["copy"]) |
| 934 | } |
| 935 | } |
| 936 | } |
| 937 | }) |
| 938 | |
| 939 | t.Run("refused", func(t *testing.T) { |
| 940 | mustRun(t, ctx, chromedp.Evaluate(`navigator.clipboard.writeText = () => Promise.reject(new Error("refused")); getSelection().removeAllRanges(); true`, nil), |
| 941 | chromedp.Click("[rst-snippet-copy]", chromedp.ByQuery), chromedp.Sleep(200*time.Millisecond)) |
| 942 | if c := readCopy(t, ctx); c.Live != words["copy.failed"] || c.Selected != installLink { |
| 943 | t.Errorf("after a refused copy the live region says %q and the selection is %q; want %q and the link tag", c.Live, c.Selected, words["copy.failed"]) |
| 944 | } |
| 945 | }) |
| 946 | |
| 947 | t.Run("no clipboard API", func(t *testing.T) { |
| 948 | onNewDocument(t, ctx, `Object.defineProperty(navigator, "clipboard", { value: undefined });`) |
| 949 | open(t, ctx, rig, 1280, 900) |
| 950 | mustRun(t, ctx, soon(".site-themebar")) |
| 951 | if c := readCopy(t, ctx); !c.Present || c.Shown { |
| 952 | t.Errorf("with no clipboard API the Copy button is present=%v shown=%v; want present and hidden", c.Present, c.Shown) |
| 953 | } |
| 954 | }) |
| 955 | rig.Screen("#install", "the install section") |
| 956 | } |
| 957 | |
| 958 | // buntingJS reads the bunting: whether a canvas is there and shown, |
| 959 | // whether the still SVG is shown, and the canvas's pixels as a data |
| 960 | // URL, for telling two moments apart. |
| 961 | const buntingJS = `(() => { const row = document.getElementById("bunting"), c = row.querySelector("canvas"), svg = row.querySelector("svg"); |
| 962 | const shown = e => !!e && e.getClientRects().length > 0 && getComputedStyle(e).visibility !== "hidden"; |
| 963 | return JSON.stringify({Canvas: !!c, CanvasShown: shown(c), SvgShown: shown(svg), Pixels: c ? c.toDataURL() : ""}); })()` |
| 964 | |
| 965 | type bunting struct { |
| 966 | Canvas, CanvasShown, SvgShown bool |
| 967 | Pixels string |
| 968 | } |
| 969 | |
| 970 | func readBunting(t *testing.T, ctx context.Context) bunting { |
| 971 | t.Helper() |
| 972 | var b bunting |
| 973 | at(t, ctx, buntingJS, &b) |
| 974 | return b |
| 975 | } |
| 976 | |
| 977 | // reduceMotion emulates prefers-reduced-motion: reduce when on, and |
| 978 | // clears the emulation when off. |
| 979 | func reduceMotion(t *testing.T, ctx context.Context, on bool) { |
| 980 | t.Helper() |
| 981 | if on { |
| 982 | mustRun(t, ctx, emulation.SetEmulatedMedia().WithFeatures([]*emulation.MediaFeature{{Name: "prefers-reduced-motion", Value: "reduce"}})) |
| 983 | } else { |
| 984 | mustRun(t, ctx, emulation.SetEmulatedMedia().WithFeatures([]*emulation.MediaFeature{{Name: "prefers-reduced-motion", Value: "no-preference"}})) |
| 985 | } |
| 986 | } |
| 987 | |
| 988 | // waitBunting polls until the bunting reads as fn wants, or fails. |
| 989 | func waitBunting(t *testing.T, ctx context.Context, what string, fn func(bunting) bool) bunting { |
| 990 | t.Helper() |
| 991 | deadline := time.Now().Add(10 * time.Second) |
| 992 | for { |
| 993 | b := readBunting(t, ctx) |
| 994 | if fn(b) { |
| 995 | return b |
| 996 | } |
| 997 | if !time.Now().Before(deadline) { |
| 998 | t.Fatalf("%s: never happened; canvas %v (shown %v), svg shown %v", what, b.Canvas, b.CanvasShown, b.SvgShown) |
| 999 | } |
| 1000 | time.Sleep(50 * time.Millisecond) |
| 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | // TestTheBuntingMovesOnlyWhenMotionIsAllowed: under normal motion the |
| 1005 | // canvas is drawn and its pixels differ across 600 ms, the control. |
| 1006 | // Under reduced motion there is no moving canvas and the still SVG |
| 1007 | // shows. Reduced motion turned on mid-visit stops the canvas and shows |
| 1008 | // the SVG; turned off again, the canvas comes back. |
| 1009 | func TestTheBuntingMovesOnlyWhenMotionIsAllowed(t *testing.T) { |
| 1010 | rig, _ := siteRig(t) |
| 1011 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1012 | defer cancel() |
| 1013 | defer func() { |
| 1014 | rctx, rcancel := context.WithTimeout(rig.Context(), 10*time.Second) |
| 1015 | defer rcancel() |
| 1016 | _ = chromedp.Run(rctx, emulation.SetEmulatedMedia()) |
| 1017 | }() |
| 1018 | moving := func(b bunting) bool { return b.Canvas && b.CanvasShown && !b.SvgShown } |
| 1019 | still := func(b bunting) bool { return !b.CanvasShown && b.SvgShown } |
| 1020 | |
| 1021 | reduceMotion(t, ctx, false) |
| 1022 | open(t, ctx, rig, 1280, 900) |
| 1023 | before := waitBunting(t, ctx, "the canvas under normal motion", moving) |
| 1024 | mustRun(t, ctx, chromedp.Sleep(600*time.Millisecond)) |
| 1025 | after := readBunting(t, ctx) |
| 1026 | if before.Pixels == after.Pixels { |
| 1027 | t.Error("the canvas pixels are the same 600 ms apart; the bunting is not moving, so the reduced-motion check below would prove nothing") |
| 1028 | } |
| 1029 | |
| 1030 | reduceMotion(t, ctx, true) |
| 1031 | open(t, ctx, rig, 1280, 900) |
| 1032 | mustRun(t, ctx, chromedp.Sleep(300*time.Millisecond)) |
| 1033 | if b := readBunting(t, ctx); !still(b) { |
| 1034 | t.Errorf("under reduced motion the canvas is there=%v shown=%v and the SVG shown=%v; want no moving canvas and the SVG", b.Canvas, b.CanvasShown, b.SvgShown) |
| 1035 | } |
| 1036 | |
| 1037 | reduceMotion(t, ctx, false) |
| 1038 | open(t, ctx, rig, 1280, 900) |
| 1039 | waitBunting(t, ctx, "the canvas after motion was allowed again", moving) |
| 1040 | reduceMotion(t, ctx, true) |
| 1041 | waitBunting(t, ctx, "the still SVG after reduced motion was turned on mid-visit", still) |
| 1042 | mustRun(t, ctx, chromedp.Sleep(300*time.Millisecond)) |
| 1043 | if b := readBunting(t, ctx); !still(b) { |
| 1044 | t.Errorf("300 ms after reduced motion came on, canvas shown=%v and the SVG shown=%v; want the SVG alone", b.CanvasShown, b.SvgShown) |
| 1045 | } |
| 1046 | reduceMotion(t, ctx, false) |
| 1047 | waitBunting(t, ctx, "the canvas after reduced motion was turned off again", moving) |
| 1048 | rig.Screen("#headline", "the page under normal motion") |
| 1049 | } |
| 1050 | |
| 1051 | // ropeJS reads the rope's colour two ways: the most opaque pixel in |
| 1052 | // the canvas's top rows, where only the rope and its ties are drawn, |
| 1053 | // and the token the still SVG's rope is stroked with. |
| 1054 | const ropeJS = `(() => { |
| 1055 | const c = document.querySelector("#bunting canvas"); |
| 1056 | if (!c) return JSON.stringify({Alpha: -1}); |
| 1057 | const d = c.getContext("2d").getImageData(0, 0, c.width, 6).data; |
| 1058 | let best = -1, rope = null; |
| 1059 | for (let i = 0; i < d.length; i += 4) if (d[i + 3] > best) { best = d[i + 3]; rope = [d[i], d[i + 1], d[i + 2]]; } |
| 1060 | const token = (getComputedStyle(document.querySelector(".site-span")).stroke.match(/\d+/g) || []).slice(0, 3).map(Number); |
| 1061 | return JSON.stringify({Alpha: best, Rope: rope, Token: token}); |
| 1062 | })()` |
| 1063 | |
| 1064 | type rope struct { |
| 1065 | Alpha int |
| 1066 | Rope, Token []int |
| 1067 | } |
| 1068 | |
| 1069 | // near is whether two colours are within a few steps per channel, the |
| 1070 | // slack antialiasing and rounding need. |
| 1071 | func near(a, b []int) bool { |
| 1072 | if len(a) != 3 || len(b) != 3 { |
| 1073 | return false |
| 1074 | } |
| 1075 | for i := range a { |
| 1076 | if d := a[i] - b[i]; d > 6 || d < -6 { |
| 1077 | return false |
| 1078 | } |
| 1079 | } |
| 1080 | return true |
| 1081 | } |
| 1082 | |
| 1083 | // ropeMatches polls until the canvas's rope is the token's colour, or |
| 1084 | // fails naming both. |
| 1085 | func ropeMatches(t *testing.T, ctx context.Context, when string) rope { |
| 1086 | t.Helper() |
| 1087 | deadline := time.Now().Add(5 * time.Second) |
| 1088 | for { |
| 1089 | var r rope |
| 1090 | at(t, ctx, ropeJS, &r) |
| 1091 | if r.Alpha > 0 && near(r.Rope, r.Token) { |
| 1092 | return r |
| 1093 | } |
| 1094 | if !time.Now().Before(deadline) { |
| 1095 | t.Fatalf("%s: the canvas's rope is %v (alpha %d) but the token is %v; the bunting was not repainted", when, r.Rope, r.Alpha, r.Token) |
| 1096 | } |
| 1097 | time.Sleep(50 * time.Millisecond) |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | // TestTheBuntingFollowsTheTheme: the rope is a Fiesta token, and the |
| 1102 | // three themes give it three colours; choosing Signal repaints the |
| 1103 | // canvas in Signal's once its stylesheet has loaded. |
| 1104 | func TestTheBuntingFollowsTheTheme(t *testing.T) { |
| 1105 | rig, _ := siteRig(t) |
| 1106 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1107 | defer cancel() |
| 1108 | open(t, ctx, rig, 1280, 900) |
| 1109 | waitBunting(t, ctx, "the canvas under normal motion", func(b bunting) bool { return b.Canvas && b.CanvasShown }) |
| 1110 | day := ropeMatches(t, ctx, "in Day") |
| 1111 | chooseTheme(t, ctx, "signal") |
| 1112 | signal := ropeMatches(t, ctx, "after choosing Signal") |
| 1113 | if near(day.Token, signal.Token) { |
| 1114 | t.Fatalf("Day's rope token %v and Signal's %v are the same colour; this drive proves nothing", day.Token, signal.Token) |
| 1115 | } |
| 1116 | mustRun(t, ctx, chromedp.Evaluate(`localStorage.clear(); true`, nil)) |
| 1117 | rig.Screen("#headline", "the page in Signal") |
| 1118 | } |
| 1119 | |
| 1120 | // capture screenshots one rectangle of the page, in CSS pixels. |
| 1121 | func capture(t *testing.T, ctx context.Context, x, y, w, h float64) image.Image { |
| 1122 | t.Helper() |
| 1123 | var png []byte |
| 1124 | mustRun(t, ctx, chromedp.ActionFunc(func(ctx context.Context) error { |
| 1125 | var err error |
| 1126 | png, err = cdppage.CaptureScreenshot().WithClip(&cdppage.Viewport{X: x, Y: y, Width: w, Height: h, Scale: 1}).Do(ctx) |
| 1127 | return err |
| 1128 | })) |
| 1129 | img, err := imagepng.Decode(bytes.NewReader(png)) |
| 1130 | if err != nil { |
| 1131 | t.Fatalf("decoding the screenshot: %v", err) |
| 1132 | } |
| 1133 | return img |
| 1134 | } |
| 1135 | |
| 1136 | // rgb reads a pixel as 8-bit channels. |
| 1137 | func rgb(img image.Image, x, y int) [3]int { |
| 1138 | r, g, b, _ := img.At(x, y).RGBA() |
| 1139 | return [3]int{int(r >> 8), int(g >> 8), int(b >> 8)} |
| 1140 | } |
| 1141 | |
| 1142 | // apart is the largest channel difference between two colours. |
| 1143 | func apart(a, b [3]int) int { |
| 1144 | d := 0 |
| 1145 | for i := range a { |
| 1146 | if x := a[i] - b[i]; x > d { |
| 1147 | d = x |
| 1148 | } else if -x > d { |
| 1149 | d = -x |
| 1150 | } |
| 1151 | } |
| 1152 | return d |
| 1153 | } |
| 1154 | |
| 1155 | // topInk is the first row from the top of column x whose pixel is not |
| 1156 | // the background, or -1 when the column is clear: where the rope |
| 1157 | // crosses the column, since nothing hangs above the rope. |
| 1158 | func topInk(img image.Image, x int, bg [3]int) int { |
| 1159 | for y := 0; y < img.Bounds().Dy(); y++ { |
| 1160 | if apart(rgb(img, x, y), bg) > 40 { |
| 1161 | return y |
| 1162 | } |
| 1163 | } |
| 1164 | return -1 |
| 1165 | } |
| 1166 | |
| 1167 | // meanApart is the mean over every pixel of the largest channel |
| 1168 | // difference between two pictures of the same size. |
| 1169 | func meanApart(a, b image.Image) float64 { |
| 1170 | w, h := a.Bounds().Dx(), a.Bounds().Dy() |
| 1171 | sum := 0 |
| 1172 | for y := 0; y < h; y++ { |
| 1173 | for x := 0; x < w; x++ { |
| 1174 | sum += apart(rgb(a, x, y), rgb(b, x, y)) |
| 1175 | } |
| 1176 | } |
| 1177 | return float64(sum) / float64(w*h) |
| 1178 | } |
| 1179 | |
| 1180 | // TestTheStillBuntingMatchesTheMovingOne: the canvas hung at rest, |
| 1181 | // before any wind, and the still SVG in the markup are the same |
| 1182 | // picture. With the script's freeze hook set the canvas never moves; |
| 1183 | // the bunting's strip is screenshotted with the canvas showing, then |
| 1184 | // with the SVG showing in its place, and the two are compared: the |
| 1185 | // rope's height at thirty columns across the page within two pixels, |
| 1186 | // and the mean pixel difference over the strip small (the canvas's |
| 1187 | // cloth carries a weave the SVG's does not, and edges antialias apart, |
| 1188 | // so it is never zero). A flat rope under a sagging one, or pennants |
| 1189 | // hung at a different height, fails both. |
| 1190 | func TestTheStillBuntingMatchesTheMovingOne(t *testing.T) { |
| 1191 | rig, _ := siteRig(t) |
| 1192 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1193 | defer cancel() |
| 1194 | onNewDocument(t, ctx, `window.siteBuntingStill = true;`) |
| 1195 | open(t, ctx, rig, 1280, 900) |
| 1196 | waitBunting(t, ctx, "the canvas hung at rest", func(b bunting) bool { return b.Canvas && b.CanvasShown && !b.SvgShown }) |
| 1197 | var strip struct{ Top, Height, Width float64 } |
| 1198 | at(t, ctx, `(() => { const r = document.getElementById("bunting").getBoundingClientRect(), c = document.querySelector("#bunting canvas").getBoundingClientRect(); return JSON.stringify({Top: r.top, Height: c.height, Width: r.width}); })()`, &strip) |
| 1199 | if strip.Height < 100 || strip.Width < 1000 { |
| 1200 | t.Fatalf("the bunting's strip is %.0f by %.0f; this drive expects the canvas's full height across the page", strip.Width, strip.Height) |
| 1201 | } |
| 1202 | moving := capture(t, ctx, 0, strip.Top, strip.Width, strip.Height) |
| 1203 | mustRun(t, ctx, chromedp.Evaluate(`document.getElementById("bunting").classList.remove("site-bunting-live"); document.querySelector("#bunting canvas").style.visibility = "hidden"; true`, nil)) |
| 1204 | still := waitBunting(t, ctx, "the SVG shown in the canvas's place", func(b bunting) bool { return b.SvgShown && !b.CanvasShown }) |
| 1205 | _ = still |
| 1206 | stillImg := capture(t, ctx, 0, strip.Top, strip.Width, strip.Height) |
| 1207 | |
| 1208 | w, h := moving.Bounds().Dx(), moving.Bounds().Dy() |
| 1209 | if w != stillImg.Bounds().Dx() || h != stillImg.Bounds().Dy() { |
| 1210 | t.Fatalf("the two screenshots are %dx%d and %dx%d", w, h, stillImg.Bounds().Dx(), stillImg.Bounds().Dy()) |
| 1211 | } |
| 1212 | bg := rgb(moving, w-1, h-1) |
| 1213 | off, columns := 0, 0 |
| 1214 | for x := 20; x < w-20; x += 40 { |
| 1215 | a, b := topInk(moving, x, bg), topInk(stillImg, x, bg) |
| 1216 | if a < 0 || b < 0 { |
| 1217 | t.Errorf("column %d: the rope was not found (canvas row %d, SVG row %d)", x, a, b) |
| 1218 | continue |
| 1219 | } |
| 1220 | columns++ |
| 1221 | if d := a - b; d > 2 || d < -2 { |
| 1222 | off++ |
| 1223 | t.Errorf("column %d: the canvas's rope is at row %d and the SVG's at row %d", x, a, b) |
| 1224 | } |
| 1225 | } |
| 1226 | mean := meanApart(moving, stillImg) |
| 1227 | t.Logf("%d columns sampled, %d off by more than 2px; mean pixel difference %.2f", columns, off, mean) |
| 1228 | if columns < 20 { |
| 1229 | t.Fatalf("only %d columns had a rope; the strip was not the bunting", columns) |
| 1230 | } |
| 1231 | if mean > 4 { |
| 1232 | t.Errorf("the canvas at rest and the still SVG differ by %.2f per pixel on average; want under 4", mean) |
| 1233 | } |
| 1234 | rig.Screen("#headline", "the page with the still bunting") |
| 1235 | } |
| 1236 | |
| 1237 | // motionJS gives a drive what it needs to scroll the page as a reader |
| 1238 | // does and watch the canvas while it happens: rest() keeps the |
| 1239 | // canvas's pixels as they are now, off() is the percentage of them |
| 1240 | // that have plainly changed since (a channel moved by more than 48, so |
| 1241 | // the cloth moved rather than turned a shade in the light: the |
| 1242 | // slightest tilt reshades a whole pennant), glide(to, ms) scrolls |
| 1243 | // there at an even speed, one step a frame, as a trackpad does, and |
| 1244 | // shake(n, by, ms) is n quick trips down by that much and back, each |
| 1245 | // leg taking ms. The page's own scroll-behaviour is overridden: a |
| 1246 | // smooth scroll would hand the timing to the browser. |
| 1247 | const motionJS = `window.siteMotion = (() => { |
| 1248 | const canvas = () => document.querySelector("#bunting canvas"), frame = () => new Promise(r => requestAnimationFrame(r)); |
| 1249 | const pixels = () => { const c = canvas(); return c.getContext("2d").getImageData(0, 0, c.width, c.height).data; }; |
| 1250 | let base = null; |
| 1251 | const m = { |
| 1252 | frame, |
| 1253 | rest() { base = pixels(); return true; }, |
| 1254 | off() { |
| 1255 | const d = pixels(); |
| 1256 | let n = 0; |
| 1257 | for (let i = 0; i < d.length; i += 4) if (Math.max(Math.abs(d[i] - base[i]), Math.abs(d[i + 1] - base[i + 1]), Math.abs(d[i + 2] - base[i + 2]), Math.abs(d[i + 3] - base[i + 3])) > 48) n++; |
| 1258 | return 100 * n / (d.length / 4); |
| 1259 | }, |
| 1260 | async glide(to, ms, each) { |
| 1261 | const from = scrollY, t0 = performance.now(); |
| 1262 | for (;;) { |
| 1263 | await frame(); |
| 1264 | const u = Math.min(1, (performance.now() - t0) / ms); |
| 1265 | scrollTo({ top: from + (to - from) * u, behavior: "instant" }); |
| 1266 | if (each) each(); |
| 1267 | if (u >= 1) return; |
| 1268 | } |
| 1269 | }, |
| 1270 | async shake(n, by, ms, each) { |
| 1271 | const home = scrollY; |
| 1272 | for (let i = 0; i < n; i++) { await m.glide(home + by, ms, each); await m.glide(home, ms, each); } |
| 1273 | }, |
| 1274 | // motion integrates off() over the ms from now, in percent |
| 1275 | // seconds: how much of the canvas moved from rest, and for how |
| 1276 | // long, in one number. Each sample stands for the time since the |
| 1277 | // last, and none counts past the deadline, even mid-gesture, so a |
| 1278 | // slower frame rate samples less often but weighs each sample |
| 1279 | // more, and the number does not depend on it. |
| 1280 | async motion(ms, during) { |
| 1281 | const t0 = performance.now(), end = t0 + ms; |
| 1282 | let sum = 0, last = t0; |
| 1283 | const each = () => { |
| 1284 | const now = Math.min(performance.now(), end); |
| 1285 | if (now > last) { sum += m.off() * (now - last) / 1000; last = now; } |
| 1286 | }; |
| 1287 | if (during) await during(each); |
| 1288 | while (performance.now() < end) { await frame(); each(); } |
| 1289 | return sum; |
| 1290 | }, |
| 1291 | }; |
| 1292 | return m; |
| 1293 | })(); true` |
| 1294 | |
| 1295 | // buntingProbe is what siteBuntingProbe reports: the cloth's extremes |
| 1296 | // since the page opened, in the SVG's units, and whether the frame |
| 1297 | // loop is running. |
| 1298 | type buntingProbe struct { |
| 1299 | MinY, MaxY, MinX, MaxX, MaxZ, Stretch float64 |
| 1300 | Height, From, To float64 |
| 1301 | Finite, Running bool |
| 1302 | Builds int |
| 1303 | } |
| 1304 | |
| 1305 | func probeBunting(t *testing.T, ctx context.Context) buntingProbe { |
| 1306 | t.Helper() |
| 1307 | var p buntingProbe |
| 1308 | at(t, ctx, `window.siteBuntingProbe()`, &p) |
| 1309 | return p |
| 1310 | } |
| 1311 | |
| 1312 | // openStill opens the landing page with the breeze held off and the |
| 1313 | // probe on, and waits for the canvas to hang still with its loop |
| 1314 | // asleep: the cloth at rest, so whatever moves it next is the drive's. |
| 1315 | func openStill(t *testing.T, ctx context.Context, rig *harness.Rig) { |
| 1316 | t.Helper() |
| 1317 | onNewDocument(t, ctx, `window.siteBuntingWindless = true; window.siteBuntingProbe = true;`) |
| 1318 | open(t, ctx, rig, 1280, 900) |
| 1319 | waitBunting(t, ctx, "the canvas", func(b bunting) bool { return b.Canvas && b.CanvasShown && !b.SvgShown }) |
| 1320 | settle(t, ctx, "the canvas before any scrolling", 10*time.Second) |
| 1321 | mustRun(t, ctx, chromedp.Evaluate(motionJS, nil)) |
| 1322 | } |
| 1323 | |
| 1324 | // settle waits for the canvas's frame loop to go to sleep, which it |
| 1325 | // does once the cloth is still, and fails after within. |
| 1326 | func settle(t *testing.T, ctx context.Context, what string, within time.Duration) time.Duration { |
| 1327 | t.Helper() |
| 1328 | start := time.Now() |
| 1329 | for { |
| 1330 | if p := probeBunting(t, ctx); !p.Running { |
| 1331 | return time.Since(start) |
| 1332 | } |
| 1333 | if time.Since(start) > within { |
| 1334 | t.Fatalf("%s: the cloth was still moving %v later", what, within) |
| 1335 | } |
| 1336 | time.Sleep(50 * time.Millisecond) |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | // TestTheBuntingFollowsTheScrollBack: a reader scrolls the row off |
| 1341 | // screen, reads a little, and scrolls back up quickly. The air the |
| 1342 | // page moved through is still moving when the row comes back, so the |
| 1343 | // cloth lifts at once: within 300 ms of the row's return the canvas |
| 1344 | // is well away from its rest. Then it settles, and the loop sleeps, |
| 1345 | // within a few seconds. The breeze is held off so the scroll is the |
| 1346 | // only thing moving the cloth. Settled means the loop has gone to |
| 1347 | // sleep and the canvas is back within 1 of its rest. |
| 1348 | func TestTheBuntingFollowsTheScrollBack(t *testing.T) { |
| 1349 | rig, _ := siteRig(t) |
| 1350 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1351 | defer cancel() |
| 1352 | openStill(t, ctx, rig) |
| 1353 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.rest()`, nil)) |
| 1354 | var back struct{ Peak, Returned float64 } |
| 1355 | at(t, ctx, `(async () => { |
| 1356 | const m = siteMotion, row = document.getElementById("bunting"); |
| 1357 | await m.glide(700, 250); |
| 1358 | await new Promise(r => setTimeout(r, 1200)); |
| 1359 | let returned = -1, peak = 0; |
| 1360 | const each = () => { |
| 1361 | if (returned < 0 && row.getBoundingClientRect().bottom > 0) returned = performance.now(); |
| 1362 | if (returned >= 0 && performance.now() - returned <= 300) peak = Math.max(peak, m.off()); |
| 1363 | }; |
| 1364 | await m.glide(0, 250, each); |
| 1365 | while (performance.now() - returned <= 300) { await m.frame(); each(); } |
| 1366 | return JSON.stringify({Peak: peak, Returned: returned}); |
| 1367 | })()`, &back, awaitPromise) |
| 1368 | if back.Returned < 0 { |
| 1369 | t.Fatal("the row never came back on screen") |
| 1370 | } |
| 1371 | took := settle(t, ctx, "the cloth after the scroll back", 8*time.Second) |
| 1372 | var after float64 |
| 1373 | at(t, ctx, `JSON.stringify(siteMotion.off())`, &after) |
| 1374 | t.Logf("within 300 ms of the row's return %.2f%% of the canvas had moved from rest; it settled %v later, %.2f%% off rest", back.Peak, took.Round(10*time.Millisecond), after) |
| 1375 | if back.Peak < buntingScrollBack { |
| 1376 | t.Errorf("within 300 ms of the row coming back at most %.2f%% of the canvas had moved from rest; want at least %.0f%%: the scroll back did not reach the cloth", back.Peak, buntingScrollBack) |
| 1377 | } |
| 1378 | if after > 1 { |
| 1379 | t.Errorf("the settled canvas is %.2f%% off its rest before the scroll; want under 1%%", after) |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | // buntingScrollBack is the percentage of the canvas, in motionJS's |
| 1384 | // off(), that must move from rest within 300 ms of a quick scroll |
| 1385 | // back: before the cloth felt the air it was under 1, with it near 10. |
| 1386 | const buntingScrollBack = 3.0 |
| 1387 | |
| 1388 | // TestAShakeMovesTheBuntingMoreThanAScroll: near the top of the page, |
| 1389 | // three quick trips 80 px down and back, 100 ms a leg, are the frame |
| 1390 | // jolting, and the cloth must dance; one slow trip down the same 80 px |
| 1391 | // and back, 800 ms a leg, is a gentle current, and the cloth only |
| 1392 | // sways. Each is measured over the same three seconds from its start, |
| 1393 | // with the breeze held off and the cloth at rest before each. 80 px |
| 1394 | // keeps the row on screen; much further and it leaves, and the loop |
| 1395 | // sleeps. |
| 1396 | func TestAShakeMovesTheBuntingMoreThanAScroll(t *testing.T) { |
| 1397 | rig, _ := siteRig(t) |
| 1398 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1399 | defer cancel() |
| 1400 | openStill(t, ctx, rig) |
| 1401 | var slow, shake float64 |
| 1402 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.rest()`, nil)) |
| 1403 | at(t, ctx, `siteMotion.motion(3000, each => siteMotion.shake(1, 80, 800, each)).then(JSON.stringify)`, &slow, awaitPromise) |
| 1404 | settle(t, ctx, "the cloth after the slow scroll", 8*time.Second) |
| 1405 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.rest()`, nil)) |
| 1406 | at(t, ctx, `siteMotion.motion(3000, each => siteMotion.shake(3, 80, 100, each)).then(JSON.stringify)`, &shake, awaitPromise) |
| 1407 | t.Logf("motion over three seconds, off() integrated over time: the slow scroll %.2f, the shake %.2f %%·s (%.1f times)", slow, shake, shake/max(slow, 1e-9)) |
| 1408 | if slow <= 0 { |
| 1409 | t.Errorf("the slow scroll did not move the cloth at all") |
| 1410 | } |
| 1411 | if shake < 1.8*slow { |
| 1412 | t.Errorf("the shake moved the canvas %.2f %%·s and the slow scroll %.2f; want the shake at least 1.8 times the scroll", shake, slow) |
| 1413 | } |
| 1414 | } |
| 1415 | |
| 1416 | // TestTheBuntingNeverLeavesItsRow: a violent shake, far faster than a |
| 1417 | // hand, with the breeze blowing, never throws the cloth out of the |
| 1418 | // canvas or tears it. The probe reports every point's extremes from |
| 1419 | // the page opening to the end of the shake: each one finite, inside |
| 1420 | // the canvas top to bottom and between the end tacks, and no link |
| 1421 | // stretched past half again its length. |
| 1422 | func TestTheBuntingNeverLeavesItsRow(t *testing.T) { |
| 1423 | rig, _ := siteRig(t) |
| 1424 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1425 | defer cancel() |
| 1426 | onNewDocument(t, ctx, `window.siteBuntingProbe = true;`) |
| 1427 | open(t, ctx, rig, 1280, 900) |
| 1428 | waitBunting(t, ctx, "the canvas", func(b bunting) bool { return b.Canvas && b.CanvasShown && !b.SvgShown }) |
| 1429 | mustRun(t, ctx, chromedp.Evaluate(motionJS, nil)) |
| 1430 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.rest(); siteMotion.motion(1500, each => siteMotion.shake(25, 90, 1, each))`, nil, awaitPromise)) |
| 1431 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.motion(1500, each => siteMotion.glide(3000, 1).then(() => siteMotion.glide(0, 1)).then(() => siteMotion.shake(10, 120, 1, each)))`, nil, awaitPromise)) |
| 1432 | p := probeBunting(t, ctx) |
| 1433 | t.Logf("extremes: y %.1f to %.1f of %.1f, x %.1f to %.1f between %.1f and %.1f, |z| %.1f, stretch %.3f", p.MinY, p.MaxY, p.Height, p.MinX, p.MaxX, p.From, p.To, p.MaxZ, p.Stretch) |
| 1434 | if !p.Finite { |
| 1435 | t.Fatal("a point of the cloth went to NaN or infinity") |
| 1436 | } |
| 1437 | if p.MinY < 0 || p.MaxY > p.Height { |
| 1438 | t.Errorf("the cloth reached y %.1f to %.1f; the canvas shows 0 to %.1f", p.MinY, p.MaxY, p.Height) |
| 1439 | } |
| 1440 | if p.MinX < p.From || p.MaxX > p.To { |
| 1441 | t.Errorf("the cloth reached x %.1f to %.1f; the rope's end tacks are at %.1f and %.1f", p.MinX, p.MaxX, p.From, p.To) |
| 1442 | } |
| 1443 | if p.Stretch > 1.5 { |
| 1444 | t.Errorf("a link stretched to %.2f times its length; the cloth tore", p.Stretch) |
| 1445 | } |
| 1446 | } |
| 1447 | |
| 1448 | // TestAScrollAfterIdleWakesTheBunting: a reader leaves the page for |
| 1449 | // twenty seconds, then turns the wheel once, 80 px, with the row on |
| 1450 | // screen. One scroll event that long after the last is a slow scroll |
| 1451 | // by its average speed, but the air it moves is real, so the cloth |
| 1452 | // must wake and lift. |
| 1453 | func TestAScrollAfterIdleWakesTheBunting(t *testing.T) { |
| 1454 | rig, _ := siteRig(t) |
| 1455 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1456 | defer cancel() |
| 1457 | openStill(t, ctx, rig) |
| 1458 | mustRun(t, ctx, chromedp.Evaluate(`scrollTo({top: 80, behavior: "instant"}); true`, nil)) |
| 1459 | mustRun(t, ctx, chromedp.Sleep(20*time.Second)) |
| 1460 | settle(t, ctx, "the cloth after twenty idle seconds", time.Second) |
| 1461 | var peak float64 |
| 1462 | at(t, ctx, `(async () => { |
| 1463 | const m = siteMotion; |
| 1464 | m.rest(); |
| 1465 | scrollTo({top: 0, behavior: "instant"}); |
| 1466 | let peak = 0; |
| 1467 | const t0 = performance.now(); |
| 1468 | while (performance.now() - t0 < 1000) { await m.frame(); peak = Math.max(peak, m.off()); } |
| 1469 | return JSON.stringify(peak); |
| 1470 | })()`, &peak, awaitPromise) |
| 1471 | t.Logf("one 80 px scroll after twenty idle seconds moved %.2f%% of the canvas within a second", peak) |
| 1472 | if peak < 1 { |
| 1473 | t.Errorf("one 80 px scroll after twenty idle seconds moved %.2f%% of the canvas; want at least 1%%: the cloth never woke", peak) |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | // TestTheBuntingHangsTheSameAfterAShake: a rebuild (a resize, or |
| 1478 | // motion allowed again) hangs the row with the calm pre-roll, which |
| 1479 | // must be the rest pose whatever the cloth was doing: the flutter a |
| 1480 | // shake leaves behind must not leak into it, or the first frame after |
| 1481 | // the rebuild is not the still SVG. The viewport grows a pixel taller |
| 1482 | // right after a shake, which rebuilds the same row; the pose it hangs |
| 1483 | // is held to the one hung when the page opened. |
| 1484 | func TestTheBuntingHangsTheSameAfterAShake(t *testing.T) { |
| 1485 | rig, _ := siteRig(t) |
| 1486 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1487 | defer cancel() |
| 1488 | openStill(t, ctx, rig) |
| 1489 | var before, after []float64 |
| 1490 | at(t, ctx, `window.siteBuntingProbe.hung()`, &before) |
| 1491 | builds := probeBunting(t, ctx).Builds |
| 1492 | mustRun(t, ctx, chromedp.Evaluate(`siteMotion.rest(); siteMotion.shake(3, 80, 100)`, nil, awaitPromise)) |
| 1493 | mustRun(t, ctx, chromedp.EmulateViewport(1280, 901)) |
| 1494 | deadline := time.Now().Add(5 * time.Second) |
| 1495 | for probeBunting(t, ctx).Builds == builds { |
| 1496 | if time.Now().After(deadline) { |
| 1497 | t.Fatal("resizing the viewport never rebuilt the row") |
| 1498 | } |
| 1499 | time.Sleep(20 * time.Millisecond) |
| 1500 | } |
| 1501 | at(t, ctx, `window.siteBuntingProbe.hung()`, &after) |
| 1502 | if len(before) == 0 || len(before) != len(after) { |
| 1503 | t.Fatalf("the row hung %d coordinates before the shake and %d after; the rebuild was not the same row", len(before), len(after)) |
| 1504 | } |
| 1505 | worst := 0.0 |
| 1506 | for i := range before { |
| 1507 | worst = max(worst, math.Abs(after[i]-before[i])) |
| 1508 | } |
| 1509 | t.Logf("the pose hung after the shake is at most %.4f units from the one hung before", worst) |
| 1510 | if worst > 0.01 { |
| 1511 | t.Errorf("the pose hung after a shake is %.2f units from the rest pose; want under 0.01: the shake leaked into the calm pre-roll", worst) |
| 1512 | } |
| 1513 | } |
| 1514 | |
| 1515 | // TestReducedMotionIgnoresScrolling: under reduced motion there is no |
| 1516 | // canvas, and scrolling and shaking the page leave the still SVG |
| 1517 | // exactly as it was. |
| 1518 | func TestReducedMotionIgnoresScrolling(t *testing.T) { |
| 1519 | rig, _ := siteRig(t) |
| 1520 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1521 | defer cancel() |
| 1522 | defer func() { |
| 1523 | rctx, rcancel := context.WithTimeout(rig.Context(), 10*time.Second) |
| 1524 | defer rcancel() |
| 1525 | _ = chromedp.Run(rctx, emulation.SetEmulatedMedia()) |
| 1526 | }() |
| 1527 | reduceMotion(t, ctx, true) |
| 1528 | open(t, ctx, rig, 1280, 900) |
| 1529 | still := func(b bunting) bool { return !b.Canvas && b.SvgShown } |
| 1530 | waitBunting(t, ctx, "the still SVG under reduced motion", still) |
| 1531 | var strip struct{ Top, Height, Width float64 } |
| 1532 | at(t, ctx, `(() => { const r = document.getElementById("bunting").getBoundingClientRect(); return JSON.stringify({Top: r.top, Height: r.height, Width: r.width}); })()`, &strip) |
| 1533 | before := capture(t, ctx, 0, strip.Top, strip.Width, strip.Height) |
| 1534 | mustRun(t, ctx, chromedp.Evaluate(motionJS, nil)) |
| 1535 | mustRun(t, ctx, chromedp.Evaluate(`(async () => { await siteMotion.glide(700, 250); await siteMotion.glide(0, 250); await siteMotion.shake(3, 60, 70); await new Promise(r => setTimeout(r, 300)); return true; })()`, nil, awaitPromise)) |
| 1536 | if b := readBunting(t, ctx); !still(b) { |
| 1537 | t.Errorf("after scrolling under reduced motion the canvas is there=%v and the SVG shown=%v; want the SVG alone", b.Canvas, b.SvgShown) |
| 1538 | } |
| 1539 | after := capture(t, ctx, 0, strip.Top, strip.Width, strip.Height) |
| 1540 | if d := meanApart(before, after); d != 0 { |
| 1541 | t.Errorf("the still SVG changed by %.2f per pixel after scrolling under reduced motion; want no change", d) |
| 1542 | } |
| 1543 | } |
| 1544 | |
| 1545 | // withoutAnchorSupport is what anchor.js's feature test sees in a |
| 1546 | // browser without anchor positioning: CSS.supports says no to it. |
| 1547 | const withoutAnchorSupport = `(() => { const s = CSS.supports.bind(CSS); CSS.supports = (...a) => !/position-area|position-try/.test(a.join(" ")) && s(...a); })()` |
| 1548 | |
| 1549 | // menuJS opens the language menu and measures its panel against the |
| 1550 | // viewport. |
| 1551 | const menuJS = `(async () => { const d = document.querySelector(".site-lang"); d.querySelector("summary").click(); |
| 1552 | await new Promise(r => requestAnimationFrame(() => requestAnimationFrame(r))); |
| 1553 | const p = d.querySelector(":scope > [rst-dropdown-menu]").getBoundingClientRect(); |
| 1554 | return JSON.stringify({Open: d.open, Left: p.left, Right: p.right, Top: p.top, Bottom: p.bottom, VW: document.documentElement.clientWidth, VH: innerHeight, Flipped: document.documentElement.hasAttribute("data-rst-flip-menus")}); })()` |
| 1555 | |
| 1556 | // TestTheLanguageMenuOpensOnAPhone: at 320px the language menu opens |
| 1557 | // with its panel inside the viewport, with the browser's own anchor |
| 1558 | // positioning and with anchor.js standing in for it. |
| 1559 | func TestTheLanguageMenuOpensOnAPhone(t *testing.T) { |
| 1560 | for _, leg := range []struct { |
| 1561 | name string |
| 1562 | anchor bool |
| 1563 | }{{"anchor positioning", true}, {"anchor.js", false}} { |
| 1564 | t.Run(leg.name, func(t *testing.T) { |
| 1565 | rig, _ := siteRig(t) |
| 1566 | ctx, cancel := context.WithTimeout(rig.Context(), 2*time.Minute) |
| 1567 | defer cancel() |
| 1568 | if !leg.anchor { |
| 1569 | onNewDocument(t, ctx, withoutAnchorSupport) |
| 1570 | } |
| 1571 | mustRun(t, ctx, chromedp.ActionFunc(func(c context.Context) error { |
| 1572 | return emulation.SetDeviceMetricsOverride(320, 640, 1, false).Do(c) |
| 1573 | }), chromedp.Navigate(rig.Origin+"/"), soon(".site-lang")) |
| 1574 | var g struct { |
| 1575 | Open, Flipped bool |
| 1576 | Left, Right, Top, Bottom, VW, VH float64 |
| 1577 | } |
| 1578 | at(t, ctx, menuJS, &g, awaitPromise) |
| 1579 | if !g.Open { |
| 1580 | t.Fatal("the language menu did not open") |
| 1581 | } |
| 1582 | if g.Flipped != !leg.anchor { |
| 1583 | t.Errorf("anchor.js marked the root %v; want %v on this leg", g.Flipped, !leg.anchor) |
| 1584 | } |
| 1585 | if g.Left < -1 || g.Right > g.VW+1 || g.Top < -1 || g.Bottom > g.VH+1 { |
| 1586 | t.Errorf("the language menu's panel spans %.0f…%.0f by %.0f…%.0f in a %.0fx%.0f viewport; it is off the screen", g.Left, g.Right, g.Top, g.Bottom, g.VW, g.VH) |
| 1587 | } |
| 1588 | rig.Screen(".site-lang", "the language menu open") |
| 1589 | }) |
| 1590 | } |
| 1591 | } |
| 1592 | |
amadan