| 1 | package nodetest |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "os" |
| 6 | "runtime" |
| 7 | "strings" |
| 8 | "testing" |
| 9 | "time" |
| 10 | ) |
| 11 | |
| 12 | // Run round-trips stdin, Args, Env and Dir through a real node. |
| 13 | func TestRunRoundTrips(t *testing.T) { |
| 14 | out := Run(t, Cmd{ |
| 15 | Dir: "testdata", |
| 16 | Args: []string{"echo.mjs", "a", "b"}, |
| 17 | Stdin: []byte(`{"hello":"node"}`), |
| 18 | Env: []string{"TZ=UTC"}, |
| 19 | }) |
| 20 | if got, want := string(out), `{"HELLO":"NODE"} tz=UTC args=a,b`; got != want { |
| 21 | t.Fatalf("output = %q, want %q", got, want) |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | // recorder captures a Fatal or Skip instead of acting on it, so a test |
| 26 | // can assert on how Run failed its caller. |
| 27 | type recorder struct { |
| 28 | testing.TB |
| 29 | fatal, skip string |
| 30 | } |
| 31 | |
| 32 | func (r *recorder) Helper() {} |
| 33 | func (r *recorder) Fatalf(format string, args ...any) { |
| 34 | r.fatal = fmt.Sprintf(format, args...) |
| 35 | runtime.Goexit() |
| 36 | } |
| 37 | func (r *recorder) Skipf(format string, args ...any) { |
| 38 | r.skip = fmt.Sprintf(format, args...) |
| 39 | runtime.Goexit() |
| 40 | } |
| 41 | |
| 42 | func record(t *testing.T, fn func(testing.TB)) *recorder { |
| 43 | t.Helper() |
| 44 | r := &recorder{TB: t} |
| 45 | done := make(chan struct{}) |
| 46 | go func() { |
| 47 | defer close(done) |
| 48 | fn(r) |
| 49 | }() |
| 50 | <-done |
| 51 | return r |
| 52 | } |
| 53 | |
| 54 | // A failure reports both streams: node --test explains itself on |
| 55 | // stdout, a crash on stderr, and dropping either (Tito's first version |
| 56 | // kept only stderr) leaves the reader with half the story. |
| 57 | func TestRunFailureCarriesBothStreams(t *testing.T) { |
| 58 | Node(t) |
| 59 | r := record(t, func(tb testing.TB) { Run(tb, Cmd{Dir: "testdata", Args: []string{"fail.mjs"}}) }) |
| 60 | for _, want := range []string{"node fail.mjs", "exit status 3", "stdout-says-why", "stderr-says-why"} { |
| 61 | if !strings.Contains(r.fatal, want) { |
| 62 | t.Errorf("failure message lacks %q:\n%s", want, r.fatal) |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | // A script that never exits fails its test at the timeout, by name, |
| 68 | // rather than holding the package until go test's own alarm. |
| 69 | func TestRunTimesOut(t *testing.T) { |
| 70 | Node(t) |
| 71 | start := time.Now() |
| 72 | r := record(t, func(tb testing.TB) { |
| 73 | Run(tb, Cmd{Dir: "testdata", Args: []string{"hang.mjs"}, Timeout: 200 * time.Millisecond}) |
| 74 | }) |
| 75 | if !strings.Contains(r.fatal, "timed out after 200ms") { |
| 76 | t.Fatalf("a hung script gave %q, want the timeout", r.fatal) |
| 77 | } |
| 78 | if d := time.Since(start); d > 30*time.Second { |
| 79 | t.Fatalf("the timeout took %s to fire", d) |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | // No node skips, naming the test — and fails instead under RequireEnv, |
| 84 | // because a CI image that lost node must not retire every JavaScript |
| 85 | // check in silence. |
| 86 | func TestMissingNode(t *testing.T) { |
| 87 | t.Setenv("PATH", t.TempDir()) |
| 88 | |
| 89 | t.Setenv(RequireEnv, "") |
| 90 | os.Unsetenv(RequireEnv) |
| 91 | r := record(t, func(tb testing.TB) { Node(tb) }) |
| 92 | if r.fatal != "" || !strings.Contains(r.skip, t.Name()) { |
| 93 | t.Errorf("without node: skip %q, fatal %q; want a skip naming %s", r.skip, r.fatal, t.Name()) |
| 94 | } |
| 95 | |
| 96 | t.Setenv(RequireEnv, "1") |
| 97 | r = record(t, func(tb testing.TB) { Node(tb) }) |
| 98 | if r.skip != "" || !strings.Contains(r.fatal, RequireEnv) { |
| 99 | t.Errorf("without node under %s: skip %q, fatal %q; want a failure", RequireEnv, r.skip, r.fatal) |
| 100 | } |
| 101 | } |
| 102 | |
amadan