d    Duration
	want float64
}{
	{Duration(-60000000000), -1},
	{Duration(-1), -1 / 60e9},
	{Duration(1), 1 / 60e9},
	{Duration(60000000000), 1},
	{Duration(3000), 5e-8},
}

func TestDurationMinutes(t *testing.T) {
	for _, tt := range minDurationTests {
		if got := tt.d.Minutes(); got != tt.want {
			t.Errorf("Duration(%s).Minutes() = %g; want: %g", tt.d, got, tt.want)
		}
	}
}