testWrite{"Kilts", 5, nil},
			testHeader{Header{Name: "dir/"}, nil},
			testClose{nil},
		},
	}}

	equalError := func(x, y error) bool {
		_, ok1 := x.(headerError)
		_, ok2 := y.(headerError)
		if ok1 || ok2 {
			return ok1 && ok2
		}
		return x == y
	}
	for _, v := range vectors {
		t.Run(strings.TrimSuffix(path.Base(v.file), ".base64"), func(t *testing.T) {