vendor tsgo

tools/tsgo/internal/testutil/filefixture/filefixture.go

@@ -0,0 +1,74 @@
+package filefixture
+
+import (
+	"os"
+	"sync"
+	"testing"
+)
+
+type Fixture interface {
+	Name() string
+	Path() string
+	SkipIfNotExist(t testing.TB)
+	ReadFile(t testing.TB) string
+}
+
+type fromFile struct {
+	name     string
+	path     string
+	contents func() (string, error)
+}
+
+func FromFile(name string, path string) Fixture {
+	return &fromFile{
+		name: name,
+		path: path,
+		// Cache the file contents and errors.
+		contents: sync.OnceValues(func() (string, error) {
+			b, err := os.ReadFile(path)
+			return string(b), err
+		}),
+	}
+}
+
+func (f *fromFile) Name() string { return f.name }
+func (f *fromFile) Path() string { return f.path }
+
+func (f *fromFile) SkipIfNotExist(tb testing.TB) {
+	tb.Helper()
+
+	if _, err := os.Stat(f.path); err != nil {
+		tb.Skipf("Test fixture %q does not exist", f.path)
+	}
+}
+
+func (f *fromFile) ReadFile(tb testing.TB) string {
+	tb.Helper()
+
+	contents, err := f.contents()
+	if err != nil {
+		tb.Fatalf("Failed to read test fixture %q: %v", f.path, err)
+	}
+	return contents
+}
+
+type fromString struct {
+	name     string
+	path     string
+	contents string
+}
+
+func FromString(name string, path string, contents string) Fixture {
+	return &fromString{
+		name:     name,
+		path:     path,
+		contents: contents,
+	}
+}
+
+func (f *fromString) Name() string { return f.name }
+func (f *fromString) Path() string { return f.path }
+
+func (f *fromString) SkipIfNotExist(tb testing.TB) {}
+
+func (f *fromString) ReadFile(tb testing.TB) string { return f.contents }