}
	s = buf.String()
	if s != string(latin1) {
		t.Fatalf("write utf-8: got %q, want %q", s, string(latin1))
	}
}

// TestLatin1RoundTrip tests that metadata that is representable in Latin-1
// survives a round trip.
func TestLatin1RoundTrip(t *testing.T) {
	testCases := []struct {
		name string
		ok   bool
	}{
		{"", true},
		{"ASCII is OK", true},