if err != nil {
			t.Errorf("ParseDate(%s): %v", test.dateStr, err)
		} else if !date.Equal(test.exp) {
			t.Errorf("ParseDate(%s) = %+v, want %+v", test.dateStr, date, test.exp)
		}
	}
}

func TestDateParsingCFWS(t *testing.T) {
	tests := []struct {
		dateStr string
		exp     time.Time
		valid   bool
	}{
		// FWS-only. No date.
		{
			"   ",
			// nil is not allowed