| 1 | package layout_test |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "math" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "strings" |
| 9 | "testing" |
| 10 | |
| 11 | "amadan.net/oficina/slides/internal/slides/deck" |
| 12 | "amadan.net/oficina/slides/internal/slides/fonts" |
| 13 | "amadan.net/oficina/slides/internal/slides/layout" |
| 14 | ) |
| 15 | |
| 16 | // goldenNames pairs a fixture slide with the paint list it writes. |
| 17 | // Between them the nine cover every flow template, both layout modes, |
| 18 | // and every block type in §2.4. |
| 19 | var goldenNames = []struct { |
| 20 | name string |
| 21 | index int |
| 22 | }{ |
| 23 | {"title", 0}, |
| 24 | {"title-body", 1}, |
| 25 | {"two-column", 2}, |
| 26 | {"section", 3}, |
| 27 | {"image-full", 4}, |
| 28 | {"quote", 5}, |
| 29 | {"blank", 6}, |
| 30 | {"canvas", 7}, |
| 31 | {"canvas-reflow", 8}, |
| 32 | } |
| 33 | |
| 34 | func paintOf(t *testing.T, d *deck.Deck, i int) (layout.Paint, []layout.Warning) { |
| 35 | t.Helper() |
| 36 | p, warnings, err := layout.Layout(d, i) |
| 37 | if err != nil { |
| 38 | t.Fatalf("Layout(%d): %v", i, err) |
| 39 | } |
| 40 | return p, warnings |
| 41 | } |
| 42 | |
| 43 | func TestPaintGoldens(t *testing.T) { |
| 44 | d := fixture() |
| 45 | for _, g := range goldenNames { |
| 46 | t.Run(g.name, func(t *testing.T) { |
| 47 | p, _ := paintOf(t, d, g.index) |
| 48 | got, err := json.MarshalIndent(p, "", " ") |
| 49 | if err != nil { |
| 50 | t.Fatalf("marshal: %v", err) |
| 51 | } |
| 52 | got = append(got, '\n') |
| 53 | |
| 54 | path := filepath.Join("testdata", g.name+".golden.json") |
| 55 | if *update { |
| 56 | if err := os.WriteFile(path, got, 0o644); err != nil { |
| 57 | t.Fatalf("write golden: %v", err) |
| 58 | } |
| 59 | return |
| 60 | } |
| 61 | want, err := os.ReadFile(path) |
| 62 | if err != nil { |
| 63 | t.Fatalf("read golden (run with -update to create it): %v", err) |
| 64 | } |
| 65 | if string(got) != string(want) { |
| 66 | t.Errorf("%s does not match the golden; run with -update and read the diff", g.name) |
| 67 | } |
| 68 | }) |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | // Every golden also has to be a paint list somebody could actually |
| 73 | // draw: no NaN, no infinity, nothing with a negative size. A NaN |
| 74 | // coordinate serialises as `null` in JSON and draws as nothing at all, |
| 75 | // so it would pass a golden comparison forever without anybody seeing |
| 76 | // the slide it wrecked. |
| 77 | func TestNoOpIsNaNOrNegativelySized(t *testing.T) { |
| 78 | d := fixture() |
| 79 | for _, g := range goldenNames { |
| 80 | p, _ := paintOf(t, d, g.index) |
| 81 | finite := func(name string, v float64) { |
| 82 | t.Helper() |
| 83 | if math.IsNaN(v) || math.IsInf(v, 0) { |
| 84 | t.Errorf("%s: %s is %v", g.name, name, v) |
| 85 | } |
| 86 | } |
| 87 | size := func(name string, v float64) { |
| 88 | t.Helper() |
| 89 | finite(name, v) |
| 90 | if v < 0 { |
| 91 | t.Errorf("%s: %s is negative (%v)", g.name, name, v) |
| 92 | } |
| 93 | } |
| 94 | for _, op := range p.Ops { |
| 95 | switch o := op.(type) { |
| 96 | case layout.Rect: |
| 97 | finite("rect x", o.X) |
| 98 | finite("rect y", o.Y) |
| 99 | size("rect w", o.W) |
| 100 | size("rect h", o.H) |
| 101 | size("rect radius", o.Radius) |
| 102 | size("rect stroke width", o.StrokeW) |
| 103 | case layout.Ellipse: |
| 104 | finite("ellipse x", o.X) |
| 105 | finite("ellipse y", o.Y) |
| 106 | size("ellipse w", o.W) |
| 107 | size("ellipse h", o.H) |
| 108 | case layout.Line: |
| 109 | finite("line x1", o.X1) |
| 110 | finite("line y1", o.Y1) |
| 111 | finite("line x2", o.X2) |
| 112 | finite("line y2", o.Y2) |
| 113 | size("line width", o.W) |
| 114 | case layout.Image: |
| 115 | finite("image x", o.X) |
| 116 | finite("image y", o.Y) |
| 117 | size("image w", o.W) |
| 118 | size("image h", o.H) |
| 119 | case layout.Text: |
| 120 | finite("text x", o.X) |
| 121 | finite("text baseline", o.Y) |
| 122 | if len(o.Runs) == 0 { |
| 123 | t.Errorf("%s: a text op has no runs", g.name) |
| 124 | } |
| 125 | for _, r := range o.Runs { |
| 126 | size("run size", r.Size) |
| 127 | if r.S == "" { |
| 128 | t.Errorf("%s: a run has no text", g.name) |
| 129 | } |
| 130 | if r.Fill == "" { |
| 131 | t.Errorf("%s: a run has no colour", g.name) |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | func TestTheFrameIsAlways1920By1080(t *testing.T) { |
| 140 | d := fixture() |
| 141 | for _, g := range goldenNames { |
| 142 | p, _ := paintOf(t, d, g.index) |
| 143 | if p.W != 1920 || p.H != 1080 { |
| 144 | t.Errorf("%s is %vx%v", g.name, p.W, p.H) |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | func TestLayoutRejectsAnIndexOutsideTheDeck(t *testing.T) { |
| 150 | d := fixture() |
| 151 | for _, i := range []int{-1, len(d.Slides), len(d.Slides) + 10} { |
| 152 | if _, _, err := layout.Layout(d, i); err == nil { |
| 153 | t.Errorf("Layout(%d) of a %d-slide deck returned no error", i, len(d.Slides)) |
| 154 | } |
| 155 | } |
| 156 | if _, _, err := layout.Layout(nil, 0); err == nil { |
| 157 | t.Error("Layout(nil) returned no error") |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | // The background is the theme's, or the slide's own colour when it set |
| 162 | // one — the same value render writes as --slides-bg, because both come |
| 163 | // from render.SlideVars. |
| 164 | func TestTheBackgroundIsTheSlidesOwnColour(t *testing.T) { |
| 165 | d := fixture() |
| 166 | p, _ := paintOf(t, d, 0) |
| 167 | if p.Background != "#faf7f0" { |
| 168 | t.Errorf("a paper slide's background is %q, want #faf7f0", p.Background) |
| 169 | } |
| 170 | p, _ = paintOf(t, d, 3) // the section slide sets its own plum |
| 171 | if p.Background != "#2b1030" { |
| 172 | t.Errorf("a slide with its own background is %q, want #2b1030", p.Background) |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | // A slide with a picture behind it paints that first, under |
| 177 | // everything: an op list is drawn in order. |
| 178 | func TestASlideBackgroundImageIsPaintedFirst(t *testing.T) { |
| 179 | d := fixture() |
| 180 | p, _ := paintOf(t, d, 4) |
| 181 | if len(p.Ops) == 0 { |
| 182 | t.Fatal("the image-full slide painted nothing") |
| 183 | } |
| 184 | img, ok := p.Ops[0].(layout.Image) |
| 185 | if !ok { |
| 186 | t.Fatalf("the first op is %T, want the background image", p.Ops[0]) |
| 187 | } |
| 188 | if img.Asset != "asset0002bbb" || img.W != 1920 || img.H != 1080 { |
| 189 | t.Errorf("the background image is %+v", img) |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | // §2.3: a canvas box is a fraction of the frame, verbatim. This is the |
| 194 | // one place the engine is not allowed any judgement at all — somebody |
| 195 | // put the block there. |
| 196 | func TestCanvasBoxesArePlacedVerbatim(t *testing.T) { |
| 197 | d := &deck.Deck{ |
| 198 | Meta: deck.Meta{Theme: "paper"}, |
| 199 | Slides: []deck.Slide{{ |
| 200 | ID: "s", Layout: "canvas", Template: "blank", |
| 201 | Blocks: []deck.Block{{ |
| 202 | ID: "b", Type: "shape", Z: 1, Box: box(0.25, 0.5, 0.5, 0.25), |
| 203 | Props: map[string]any{"kind": "rect", "fill": "#ff0000", "stroke": "none"}, |
| 204 | }}, |
| 205 | }}, |
| 206 | } |
| 207 | p, _ := paintOf(t, d, 0) |
| 208 | var got layout.Rect |
| 209 | for _, op := range p.Ops { |
| 210 | if r, ok := op.(layout.Rect); ok { |
| 211 | got = r |
| 212 | } |
| 213 | } |
| 214 | // The 1% inset is render's own viewBox geometry (`x="1"` in a |
| 215 | // 0..100 box), not a margin this package invented. |
| 216 | wantX, wantW := 0.25*1920+0.5*1920*0.01, 0.5*1920*0.98 |
| 217 | if math.Abs(got.X-wantX) > 0.01 || math.Abs(got.W-wantW) > 0.01 { |
| 218 | t.Errorf("a box at x 0.25 w 0.5 painted at x %v w %v, want %v and %v", got.X, got.W, wantX, wantW) |
| 219 | } |
| 220 | if math.Abs(got.Y-(0.5*1080+0.25*1080*0.01)) > 0.01 { |
| 221 | t.Errorf("a box at y 0.5 painted at y %v", got.Y) |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | // z is paint order (§2.3), and a tie keeps the array's order. |
| 226 | func TestCanvasPaintsInZOrder(t *testing.T) { |
| 227 | mk := func(id string, z int) deck.Block { |
| 228 | return deck.Block{ID: id, Type: "text", Z: z, Box: box(0, 0, 1, 0.2), Text: txt(id)} |
| 229 | } |
| 230 | d := &deck.Deck{ |
| 231 | Meta: deck.Meta{Theme: "paper"}, |
| 232 | Slides: []deck.Slide{{ |
| 233 | ID: "s", Layout: "canvas", Template: "blank", |
| 234 | Blocks: []deck.Block{mk("third", 9), mk("first", 1), mk("second", 4), mk("tie", 9)}, |
| 235 | }}, |
| 236 | } |
| 237 | p, _ := paintOf(t, d, 0) |
| 238 | var got []string |
| 239 | for _, op := range p.Ops { |
| 240 | if txt, ok := op.(layout.Text); ok { |
| 241 | got = append(got, txt.Runs[0].S) |
| 242 | } |
| 243 | } |
| 244 | want := []string{"first", "second", "third", "tie"} |
| 245 | if strings.Join(got, ",") != strings.Join(want, ",") { |
| 246 | t.Errorf("painted %v, want %v", got, want) |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | // §2.5: the print engine never reads the phone layer. A block hidden |
| 251 | // on a phone is still on the printed page, and one the phone reorders |
| 252 | // is still where the desktop put it. |
| 253 | func TestThePhoneLayerIsNeverRead(t *testing.T) { |
| 254 | d := fixture() |
| 255 | p, _ := paintOf(t, d, 8) // the reflow slide, whose shape is phone-hidden |
| 256 | var found bool |
| 257 | for _, op := range p.Ops { |
| 258 | if txt, ok := op.(layout.Text); ok && strings.Contains(txt.Runs[0].S, "Desktop only") { |
| 259 | found = true |
| 260 | } |
| 261 | } |
| 262 | if !found { |
| 263 | t.Error("a block hidden on phones was left out of the paint list") |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | // The overflow rule, stated in the plan and in the stylesheet's own |
| 268 | // canvas comment: never clip. A word wider than its column is drawn |
| 269 | // past the edge and reported. |
| 270 | func TestALongWordOverflowsRatherThanBeingCut(t *testing.T) { |
| 271 | const long = "Unconscionablyunhyphenatedsupercalifragilisticexpialidocioussequence" |
| 272 | d := &deck.Deck{ |
| 273 | Meta: deck.Meta{Theme: "paper"}, |
| 274 | Slides: []deck.Slide{{ |
| 275 | ID: "s", Layout: "flow", Template: "two-column", |
| 276 | Blocks: []deck.Block{{ID: "b1", Type: "text", Region: "body", Text: txt(long)}}, |
| 277 | }}, |
| 278 | } |
| 279 | p, warnings := paintOf(t, d, 0) |
| 280 | |
| 281 | var drawn string |
| 282 | var right float64 |
| 283 | for _, op := range p.Ops { |
| 284 | if txt, ok := op.(layout.Text); ok { |
| 285 | for _, r := range txt.Runs { |
| 286 | drawn += r.S |
| 287 | w, _ := fonts.Advance(r.Face, r.Size, r.S) |
| 288 | right = math.Max(right, txt.X+w) |
| 289 | } |
| 290 | } |
| 291 | } |
| 292 | if drawn != long { |
| 293 | t.Errorf("the word was drawn as %q, want it whole", drawn) |
| 294 | } |
| 295 | col := 999.936 // where two-column's body region ends |
| 296 | if right <= col { |
| 297 | t.Errorf("the word ends at %v, inside the %v column: it should overflow, not be cut", right, col) |
| 298 | } |
| 299 | if !hasWarning(warnings, layout.WarnOverflow, "b1") { |
| 300 | t.Errorf("no overflow warning; got %+v", warnings) |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | // A block that runs past the bottom of its region is drawn and |
| 305 | // reported too — the CSS lets it overflow (slides.css's canvas rules |
| 306 | // say why), so this does. |
| 307 | func TestABlockTallerThanItsRegionIsReported(t *testing.T) { |
| 308 | lines := make(deck.Text, 40) |
| 309 | for i := range lines { |
| 310 | lines[i] = []deck.Run{{T: "Another line of a body that will not fit on one slide."}} |
| 311 | } |
| 312 | d := &deck.Deck{ |
| 313 | Meta: deck.Meta{Theme: "paper"}, |
| 314 | Slides: []deck.Slide{{ |
| 315 | ID: "s", Layout: "flow", Template: "blank", |
| 316 | Blocks: []deck.Block{{ID: "tall", Type: "text", Region: "body", Text: lines}}, |
| 317 | }}, |
| 318 | } |
| 319 | p, warnings := paintOf(t, d, 0) |
| 320 | if len(p.Ops) < 40 { |
| 321 | t.Errorf("only %d ops: the overflowing lines were dropped rather than drawn", len(p.Ops)) |
| 322 | } |
| 323 | if !hasWarning(warnings, layout.WarnOverflow, "tall") { |
| 324 | t.Errorf("no overflow warning; got %+v", warnings) |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | // A rune no embedded face can draw is reported once, and the text |
| 329 | // around it is still laid out. |
| 330 | func TestARuneNoFaceCanDrawIsReported(t *testing.T) { |
| 331 | d := &deck.Deck{ |
| 332 | Meta: deck.Meta{Theme: "paper"}, |
| 333 | Slides: []deck.Slide{{ |
| 334 | ID: "s", Layout: "flow", Template: "blank", |
| 335 | Blocks: []deck.Block{{ID: "b1", Type: "text", Region: "body", |
| 336 | Text: deck.Text{{{T: "emoji 😀 and 😀 again"}}}}}, |
| 337 | }}, |
| 338 | } |
| 339 | _, warnings := paintOf(t, d, 0) |
| 340 | var glyph int |
| 341 | for _, w := range warnings { |
| 342 | if w.Kind == layout.WarnGlyph { |
| 343 | glyph++ |
| 344 | if !strings.Contains(w.Detail, "😀") { |
| 345 | t.Errorf("the warning does not name the rune: %q", w.Detail) |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | if glyph != 1 { |
| 350 | t.Errorf("got %d glyph warnings, want exactly one for a rune that appears twice", glyph) |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | // An image whose asset the deck never registered draws nothing and |
| 355 | // says so, rather than leaving a hole nobody can explain. |
| 356 | func TestAnUnregisteredImageIsReported(t *testing.T) { |
| 357 | d := &deck.Deck{ |
| 358 | Meta: deck.Meta{Theme: "paper"}, |
| 359 | Slides: []deck.Slide{{ |
| 360 | ID: "s", Layout: "flow", Template: "blank", |
| 361 | Blocks: []deck.Block{{ID: "b1", Type: "image", Region: "body", |
| 362 | Props: map[string]any{"asset": "nothing"}}}, |
| 363 | }}, |
| 364 | } |
| 365 | p, warnings := paintOf(t, d, 0) |
| 366 | for _, op := range p.Ops { |
| 367 | if _, ok := op.(layout.Image); ok { |
| 368 | t.Error("an image with no asset was drawn anyway") |
| 369 | } |
| 370 | } |
| 371 | if !hasWarning(warnings, layout.WarnAsset, "b1") { |
| 372 | t.Errorf("no asset warning; got %+v", warnings) |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | // meta.fonts can name any family at all (§2.1), and one this build |
| 377 | // does not carry is measured in a substitute — which the browser will |
| 378 | // not be using, so it is reported. |
| 379 | func TestADeckFontThisBuildLacksIsReported(t *testing.T) { |
| 380 | d := fixture() |
| 381 | d.Meta.Fonts = &deck.Fonts{Heading: "Comic Sans MS, cursive", Body: "Comic Sans MS, cursive"} |
| 382 | _, warnings := paintOf(t, d, 0) |
| 383 | var font int |
| 384 | for _, w := range warnings { |
| 385 | if w.Kind == layout.WarnFont { |
| 386 | font++ |
| 387 | } |
| 388 | } |
| 389 | if font != 2 { |
| 390 | t.Errorf("got %d font warnings for a heading and a body face, want 2: %+v", font, warnings) |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | // The six themes all lay out, and paper is the one that measures its |
| 395 | // headings in a serif — which is the fact fonts.Get holds and the |
| 396 | // stylesheet's --slides-font-heading agrees with. |
| 397 | func TestEveryThemeLaysOutAndPaperHeadsInSerif(t *testing.T) { |
| 398 | for _, theme := range []string{"paper", "ink", "sunset", "forest", "slate", "candy", "no-such-theme"} { |
| 399 | d := fixture() |
| 400 | d.Meta.Theme = theme |
| 401 | p, _ := paintOf(t, d, 0) |
| 402 | |
| 403 | var heading layout.Run |
| 404 | for _, op := range p.Ops { |
| 405 | if txt, ok := op.(layout.Text); ok && txt.Runs[0].Size > 100 { |
| 406 | heading = txt.Runs[0] |
| 407 | break |
| 408 | } |
| 409 | } |
| 410 | if heading.S == "" { |
| 411 | t.Errorf("%s: no heading was painted", theme) |
| 412 | continue |
| 413 | } |
| 414 | want := fonts.Sans |
| 415 | if theme == "paper" || theme == "no-such-theme" { // an unknown theme is paper |
| 416 | want = fonts.Serif |
| 417 | } |
| 418 | if heading.Face.Family != want { |
| 419 | t.Errorf("%s heads in %s, want %s", theme, heading.Face.Family.CSSName(), want.CSSName()) |
| 420 | } |
| 421 | if !heading.Face.Bold { |
| 422 | t.Errorf("%s: a heading is font-weight 600, which is the bold face", theme) |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | // Marks change the face, not the line: §2.6's five marks and a link, |
| 428 | // all on one line of one block. |
| 429 | func TestMarksBecomeFacesColoursAndAnUnderline(t *testing.T) { |
| 430 | d := fixture() |
| 431 | p, _ := paintOf(t, d, 1) // the marks slide |
| 432 | faces := map[string]bool{} |
| 433 | var underlines int |
| 434 | var marks int |
| 435 | for _, op := range p.Ops { |
| 436 | switch o := op.(type) { |
| 437 | case layout.Text: |
| 438 | for _, r := range o.Runs { |
| 439 | faces[r.Face.PostScriptName()] = true |
| 440 | } |
| 441 | case layout.Line: |
| 442 | underlines++ |
| 443 | case layout.Rect: |
| 444 | marks++ |
| 445 | } |
| 446 | } |
| 447 | for _, want := range []string{ |
| 448 | "LiberationSans-Regular", "LiberationSans-Bold", "LiberationSans-Italic", |
| 449 | "LiberationMono-Regular", "LiberationMono-BoldItalic", "LiberationSerif-Bold", |
| 450 | } { |
| 451 | if !faces[want] { |
| 452 | t.Errorf("no run was set in %s; got %v", want, keys(faces)) |
| 453 | } |
| 454 | } |
| 455 | if underlines == 0 { |
| 456 | t.Error("the link has no underline: §8 does not let colour alone carry it") |
| 457 | } |
| 458 | if marks == 0 { |
| 459 | t.Error("the highlighted run has no mark behind it") |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | // A list draws a marker per item, in the accent colour, hanging to the |
| 464 | // left of the text. |
| 465 | func TestAListDrawsItsMarkers(t *testing.T) { |
| 466 | d := fixture() |
| 467 | p, _ := paintOf(t, d, 1) |
| 468 | markers := map[string]float64{} |
| 469 | textX := map[string]float64{} |
| 470 | for _, op := range p.Ops { |
| 471 | txt, ok := op.(layout.Text) |
| 472 | if !ok { |
| 473 | continue |
| 474 | } |
| 475 | switch s := txt.Runs[0].S; { |
| 476 | case s == "•" || s == "1." || s == "2.": |
| 477 | markers[s] = txt.X |
| 478 | case strings.HasPrefix(s, "One item"), strings.HasPrefix(s, "First"): |
| 479 | textX[s] = txt.X |
| 480 | } |
| 481 | } |
| 482 | for _, want := range []string{"•", "1.", "2."} { |
| 483 | if _, ok := markers[want]; !ok { |
| 484 | t.Errorf("no %q marker was drawn", want) |
| 485 | } |
| 486 | } |
| 487 | for s, x := range textX { |
| 488 | for m, mx := range markers { |
| 489 | if mx >= x && strings.HasPrefix(s, "One item") && m == "•" { |
| 490 | t.Errorf("the bullet at %v is not left of its text at %v", mx, x) |
| 491 | } |
| 492 | } |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | // A table is equal columns with a rule under every row, the header's |
| 497 | // in the accent colour. |
| 498 | func TestATableIsEqualColumnsWithRules(t *testing.T) { |
| 499 | d := fixture() |
| 500 | p, _ := paintOf(t, d, 6) |
| 501 | var rules []layout.Line |
| 502 | for _, op := range p.Ops { |
| 503 | if l, ok := op.(layout.Line); ok { |
| 504 | rules = append(rules, l) |
| 505 | } |
| 506 | } |
| 507 | if len(rules) < 2 { |
| 508 | t.Fatalf("a two-row table drew %d rules", len(rules)) |
| 509 | } |
| 510 | if rules[0].Stroke != "#8a5410" { |
| 511 | t.Errorf("the header rule is %q, want the accent", rules[0].Stroke) |
| 512 | } |
| 513 | if rules[0].W != 1 { |
| 514 | t.Errorf("a table rule is %vpx, want 1", rules[0].W) |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | // The section template's accent bar is part of what gets centred, and |
| 519 | // it is the only decoration the stylesheet has. |
| 520 | func TestASectionSlideDrawsItsAccentBar(t *testing.T) { |
| 521 | d := fixture() |
| 522 | p, _ := paintOf(t, d, 3) |
| 523 | var bar *layout.Rect |
| 524 | for _, op := range p.Ops { |
| 525 | if r, ok := op.(layout.Rect); ok && r.H < 20 && r.W > 300 && r.W < 400 { |
| 526 | bar = &r |
| 527 | } |
| 528 | } |
| 529 | if bar == nil { |
| 530 | t.Fatal("no accent bar on a section slide") |
| 531 | } |
| 532 | if bar.Fill == "" || bar.Fill == p.Background { |
| 533 | t.Errorf("the accent bar is %q on a %q background", bar.Fill, p.Background) |
| 534 | } |
| 535 | if mid := bar.X + bar.W/2; math.Abs(mid-960) > 1 { |
| 536 | t.Errorf("the accent bar is centred on %v, want 960", mid) |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | // Nothing on a title slide starts outside its region, and the pair of |
| 541 | // regions straddles the middle — which is what `align-content: center` |
| 542 | // over two auto rows does. |
| 543 | func TestATitleSlideIsCentred(t *testing.T) { |
| 544 | d := fixture() |
| 545 | p, _ := paintOf(t, d, 0) |
| 546 | var top, bottom float64 = math.Inf(1), math.Inf(-1) |
| 547 | for _, op := range p.Ops { |
| 548 | if txt, ok := op.(layout.Text); ok { |
| 549 | top = math.Min(top, txt.Y) |
| 550 | bottom = math.Max(bottom, txt.Y) |
| 551 | } |
| 552 | } |
| 553 | if math.IsInf(top, 1) { |
| 554 | t.Fatal("the title slide painted no text") |
| 555 | } |
| 556 | if mid := (top + bottom) / 2; mid < 400 || mid > 680 { |
| 557 | t.Errorf("the title slide's text is centred on %v, which is not near the middle of 1080", mid) |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | // Every warning says which slide it is about. The export's status page |
| 562 | // lists warnings from a whole deck, and a line that cannot name its |
| 563 | // slide is a line nobody can act on. |
| 564 | func TestEveryWarningCarriesItsSlide(t *testing.T) { |
| 565 | d := &deck.Deck{ |
| 566 | Meta: deck.Meta{Theme: "paper", Fonts: &deck.Fonts{Heading: "Nonesuch Grotesk", Body: "Nonesuch Grotesk"}}, |
| 567 | Slides: []deck.Slide{ |
| 568 | {ID: "first", Layout: "flow", Template: "title-body", |
| 569 | Blocks: []deck.Block{{ID: "b1", Type: "text", Region: "body", Text: txt("ok")}}}, |
| 570 | {ID: "second", Layout: "flow", Template: "title-body", |
| 571 | Background: deck.Background{Kind: "image", Value: "never-registered"}, |
| 572 | Blocks: []deck.Block{ |
| 573 | {ID: "b2", Type: "image", Region: "body", Props: map[string]any{"asset": "also-missing"}}, |
| 574 | {ID: "b3", Type: "text", Region: "body", Text: txt("a rune no face draws: \U0001F600")}, |
| 575 | }}, |
| 576 | }, |
| 577 | } |
| 578 | for i, s := range d.Slides { |
| 579 | _, warnings := paintOf(t, d, i) |
| 580 | if len(warnings) == 0 { |
| 581 | t.Errorf("slide %q made no warnings, so this test is asserting nothing about it", s.ID) |
| 582 | } |
| 583 | for _, w := range warnings { |
| 584 | if w.Slide != s.ID { |
| 585 | t.Errorf("slide %q: warning %+v carries slide %q", s.ID, w, w.Slide) |
| 586 | } |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | func hasWarning(ws []layout.Warning, kind, block string) bool { |
| 592 | for _, w := range ws { |
| 593 | if w.Kind == kind && w.Block == block { |
| 594 | return true |
| 595 | } |
| 596 | } |
| 597 | return false |
| 598 | } |
| 599 | |
| 600 | func keys(m map[string]bool) []string { |
| 601 | out := make([]string, 0, len(m)) |
| 602 | for k := range m { |
| 603 | out = append(out, k) |
| 604 | } |
| 605 | return out |
| 606 | } |
| 607 | |
amadan