var alwaysError = errors.New(alwaysErrorText)

type ErrorWriter int

func (e ErrorWriter) Write(p []byte) (int, error) {
	return 0, alwaysError
}

func TestExecuteGivesExecError(t *testing.T) {
	// First, a non-execution error shouldn't be an ExecError.
	tmpl, err := New("X").Parse("hello")
	if err != nil {
		t.Fatal(err)
	}
	err = tmpl.Execute(ErrorWriter(0), 0)

var alwaysError = errors.New(alwaysErrorText)

type ErrorWriter int

func (e ErrorWriter) Write(p []byte) (int, error) {
	return 0, alwaysError
}

func TestExecuteGivesExecError(t *testing.T) {
	// First, a non-execution error shouldn't be an ExecError.
	tmpl, err := New("X").Parse("hello")
	if err != nil {
		t.Fatal(err)
	}
	err = tmpl.Execute(ErrorWriter(0), 0)