| 1 | // Package todotest tests the app from the outside: real HTTP requests |
| 2 | // against the real router, wired exactly as cmd/todo/main.go wires it. |
| 3 | package todotest |
| 4 | |
| 5 | import ( |
| 6 | "io" |
| 7 | "log/slog" |
| 8 | "net/http" |
| 9 | "net/http/httptest" |
| 10 | "net/url" |
| 11 | "os" |
| 12 | "regexp" |
| 13 | "strings" |
| 14 | "testing" |
| 15 | |
| 16 | "amadan.net/rastrillo/rastrillo/budget" |
| 17 | "amadan.net/rastrillo/rastrillo/db" |
| 18 | "amadan.net/rastrillo/rastrillo/dbtest" |
| 19 | |
| 20 | todo "todo/internal/todo" |
| 21 | ) |
| 22 | |
| 23 | // testOrigin is the origin newApp wires: the app's own. |
| 24 | const testOrigin = "http://app.test" |
| 25 | |
| 26 | // schema is migrated once per test binary and copied for each test. |
| 27 | var schema = dbtest.FromSet(todo.BootSchema) |
| 28 | |
| 29 | func TestMain(m *testing.M) { |
| 30 | code := budget.Main(m) |
| 31 | schema.Remove() |
| 32 | os.Exit(code) |
| 33 | } |
| 34 | |
| 35 | // newApp builds the whole app over its own copy of the migrated |
| 36 | // database, exactly as main.go does. |
| 37 | func newApp(t *testing.T) http.Handler { |
| 38 | t.Helper() |
| 39 | logger := slog.New(slog.NewTextHandler(io.Discard, nil)) |
| 40 | d, err := db.Open(schema.Path(t), logger) |
| 41 | if err != nil { |
| 42 | t.Fatalf("db.Open: %v", err) |
| 43 | } |
| 44 | t.Cleanup(func() { d.Close() }) |
| 45 | mux, err := todo.App(d, testOrigin, logger) |
| 46 | if err != nil { |
| 47 | t.Fatalf("App: %v", err) |
| 48 | } |
| 49 | return mux |
| 50 | } |
| 51 | |
| 52 | // browser is one visitor: a cookie jar in front of the app. |
| 53 | type browser struct { |
| 54 | t *testing.T |
| 55 | h http.Handler |
| 56 | cookies map[string]*http.Cookie |
| 57 | } |
| 58 | |
| 59 | func newBrowser(t *testing.T, h http.Handler) *browser { |
| 60 | return &browser{t: t, h: h, cookies: map[string]*http.Cookie{}} |
| 61 | } |
| 62 | |
| 63 | func (b *browser) do(req *http.Request) *httptest.ResponseRecorder { |
| 64 | b.t.Helper() |
| 65 | for _, c := range b.cookies { |
| 66 | req.AddCookie(c) |
| 67 | } |
| 68 | rec := httptest.NewRecorder() |
| 69 | b.h.ServeHTTP(rec, req) |
| 70 | for _, c := range rec.Result().Cookies() { |
| 71 | if c.MaxAge < 0 { |
| 72 | delete(b.cookies, c.Name) |
| 73 | } else { |
| 74 | b.cookies[c.Name] = c |
| 75 | } |
| 76 | } |
| 77 | return rec |
| 78 | } |
| 79 | |
| 80 | func (b *browser) get(target string) *httptest.ResponseRecorder { |
| 81 | b.t.Helper() |
| 82 | return b.do(httptest.NewRequest(http.MethodGet, target, nil)) |
| 83 | } |
| 84 | |
| 85 | // post sends a form the way the shared suite does: no Origin header. |
| 86 | func (b *browser) post(target string, form url.Values, headers ...string) *httptest.ResponseRecorder { |
| 87 | b.t.Helper() |
| 88 | req := httptest.NewRequest(http.MethodPost, target, strings.NewReader(form.Encode())) |
| 89 | req.Header.Set("Content-Type", "application/x-www-form-urlencoded") |
| 90 | for i := 0; i+1 < len(headers); i += 2 { |
| 91 | req.Header.Set(headers[i], headers[i+1]) |
| 92 | } |
| 93 | return b.do(req) |
| 94 | } |
| 95 | |
| 96 | // add posts a new todo and fails the test unless it 303s. |
| 97 | func (b *browser) add(title string) { |
| 98 | b.t.Helper() |
| 99 | rec := b.post("/todos", url.Values{"title": {title}, "filter": {"all"}}) |
| 100 | if rec.Code != http.StatusSeeOther { |
| 101 | b.t.Fatalf("POST /todos: status %d, want 303", rec.Code) |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | var itemRE = regexp.MustCompile(`(?s)<li data-id="(\d+)"(?: class="([^"]*)")?>.*?<label>(.*?)</label>`) |
| 106 | |
| 107 | type shown struct{ ID, Class, Title string } |
| 108 | |
| 109 | // items lists what a page shows, in order. |
| 110 | func items(body string) []shown { |
| 111 | var out []shown |
| 112 | for _, m := range itemRE.FindAllStringSubmatch(body, -1) { |
| 113 | out = append(out, shown{m[1], m[2], m[3]}) |
| 114 | } |
| 115 | return out |
| 116 | } |
| 117 | |
| 118 | func titles(body string) []string { |
| 119 | var out []string |
| 120 | for _, it := range items(body) { |
| 121 | out = append(out, it.Title) |
| 122 | } |
| 123 | return out |
| 124 | } |
| 125 | |
amadan