t.Errorf("Tuesday weekday = %q; want %q", got, want)
	}
	if got, want := Weekday(14).String(), "%!Weekday(14)"; got != want {
		t.Errorf("14th weekday = %q; want %q", got, want)
	}
}

func TestReadFileLimit(t *testing.T) {
	const zero = "/dev/zero"
	if _, err := os.Stat(zero); err != nil {
		t.Skip("skipping test without a /dev/zero")
	}
	_, err := ReadFile(zero)