func TestPreprocessingScale(t *testing.T) {
a := NewArguments()
assert.NoError(t, preprocessScale(a, "_:600"))
assert.Equal(t, a.NeedScaling, true)
assert.Equal(t, a.ScaleFilter, "scale=trunc(oh*a/2)*2:600")
a = NewArguments()
assert.NoError(t, preprocessScale(a, "300:600"))
assert.Equal(t, a.NeedScaling, true)
assert.Equal(t, a.ScaleFilter, "scale=300:600")
a = NewArguments()
assert.NoError(t, preprocessScale(a, "300:_"))
assert.Equal(t, a.NeedScaling, true)
assert.Equal(t, a.ScaleFilter, "scale=300:trunc(ow/a/2)*2")
}
func TestPreprocessFrom(t *testing.T) {
var zerot time.Time
a := NewArguments()
tz := TimeCode(zerot)
assert.Equal(t, a.From, tz)
assert.Equal(t, tz.String(), "00:00:00")
assert.Error(t, preprocessFrom(a, "13:01:5"))
assert.NoError(t, preprocessFrom(a, "13:01:05"))
ti, _ := time.Parse("15:04:05", "13:01:05")
assert.Equal(t, tz.String(), "00:00:00")
assert.Equal(t, a.From, TimeCode(ti))
assert.Equal(t, TimeCode(ti).String(), "13:01:05")
}