public void TestColourClearing()
{
const OmniColours colour = OmniColours.BrightCyan;
var initialColour = TestWriter.GetDecoration();
TestWriter.SetDecoration(new OmniDecoration(colour));
TestWriter.Write("Test01");
AssertLastColour(colour);
TestWriter.Write("Test02");
AssertLastColour(colour);
TestWriter.ClearDecoration();
AssertLastColour(initialColour);
TestWriter.Write(colour, "Test03");
AssertLastColour(initialColour);
TestWriter.WriteLine("Test04");
AssertLastColour(initialColour);
var message = new ColourMessage();
message.SetDecoration(new OmniDecoration(colour));
message.AppendLine("Test05");
TestWriter.Write(message);
AssertEqual(initialColour, TestColours.Last());
}