Function TestCached

cmd/testwrapper/testwrapper_test.go:393–451

(t *testing.T)

}

func TestCached(t *testing.T) {
	t.Parallel()

	// Construct our trivial package.
	pkgDir := t.TempDir()
	goVersion := runtime.Version()
	goVersion = strings.TrimPrefix(goVersion, "go")
	goVersion, _, _ = strings.Cut(goVersion, "-X:") // map 1.26.1-X:nogreenteagc to 1.26.1

	goMod := fmt.Sprintf(`module example.com

go %s
`, goVersion)
	test := `package main
import "testing"

func TestCached(t *testing.T) {}
`

	for f, c := range map[string]string{
		"go.mod":         goMod,
		"cached_test.go": test,
	} {
		err := os.WriteFile(filepath.Join(pkgDir, f), []byte(c), 0o644)
		if err != nil {
			t.Fatalf("writing package: %s", err)
		}
	}

	for name, args := range map[string][]string{
		"without_flags":     {"./..."},
		"with_short":        {"./...", "-short"},
		"with_coverprofile": {"./...", "-coverprofile=" + filepath.Join(t.TempDir(), "coverage.out")},
	} {
		t.Run(name, func(t *testing.T) {
			var (
				out []byte
				err error
			)
			for range 2 {
				cmd := cmdTestwrapper(t, args...)
				cmd.Dir = pkgDir
				out, err = cmd.CombinedOutput()
				if err != nil {
					t.Fatalf("testwrapper ./...: expected no error but got: %v; output was:\n%s", err, out)
				}
			}

			want := []byte("ok\texample.com\t(cached)")
			if !bytes.Contains(out, want) {
				t.Fatalf("wanted output containing %q but got:\n%s", want, out)
			}

			if testing.Verbose() {
				t.Logf("success - output:\n%s", out)
			}
		})
	}