public void Test_colors()
{
Color color = ColorManager.GetRandomColor();
color = ColorManager.GetColor(0);
Assert.AreEqual(ColorManager.ColorFromHtml("#99CCFF"), color);
color = ColorManager.GetColor(1);
Assert.AreEqual(ColorManager.ColorFromHtml("#CCFFCC"), color);
var colors = new List <Color>();
colors.Add(ColorManager.GetColor(0));
colors.Add(ColorManager.GetColor(1));
colors.Add(ColorManager.GetColor(3));
color = ColorManager.GetNextUnusedColor(colors);
Assert.AreEqual(ColorManager.GetColor(2), color);
var strColors = new List <string>();
strColors.Add("#99CCFF");
strColors.Add("#CCFFCC");
strColors.Add("#FFFF99");
strColors.Add("#CC99CC");
strColors.Add("#FF9999");
color = ColorManager.GetNextUnusedColor(strColors);
Assert.AreEqual(ColorManager.GetColor(4), color);
strColors.Clear();
color = ColorManager.GetNextUnusedColor(strColors);
Assert.AreEqual(ColorManager.GetColor(0), color);
strColors = null;
color = ColorManager.GetNextUnusedColor(strColors);
Assert.AreEqual(ColorManager.GetColor(0), color);
Assert.AreEqual("#99CCFF", ColorManager.GetColor(0).ToHexString());
}