public void GrayscaleTest()
{
foreach (var a in Enumerable.Range(0, 256))
{
foreach (var r in Enumerable.Range(0, 256))
{
foreach (var g in Enumerable.Range(0, 256))
{
foreach (var b in Enumerable.Range(0, 256))
{
var t = Color.FromArgb(a, r, g, b);
Assert.AreEqual(ImageFilters.GrayscaleFilter((uint)t.ToArgb()), GrayscaleFilter(t).ToArgb());
}
}
}
}
}