public void TestSwapBackDoesNothingIfPreviousIsNull()
{
FakeChatDeltinChannelSwapperCounter counter = new FakeChatDeltinChannelSwapperCounter();;
ChatChannelSwapper sut = new ChatChannelSwapper(counter);
Assert.AreEqual(counter.Counter, 0);
sut.SwapChannel(Channel.Group);
Assert.AreEqual(counter.Counter, 1);
sut.SwapBack();
Assert.AreEqual(counter.Counter, 1);
}
public void TestSwapBackReturnsToPreviousChannel()
{
FakeChatDeltinChannelSwapperCounter counter = new FakeChatDeltinChannelSwapperCounter();;
ChatChannelSwapper sut = new ChatChannelSwapper(counter);
Assert.AreEqual(counter.Counter, 0);
sut.SwapChannel(Channel.Group);
Assert.AreEqual(counter.Counter, 1);
sut.SwapChannel(Channel.Match);
Assert.AreEqual(counter.Counter, 2);
sut.SwapBack();
Assert.AreEqual(counter.Counter, 3);
sut.SwapChannelIfDifferent(Channel.Group);
Assert.AreEqual(counter.Counter, 3);
}