public void CombineTriggersToAxisTest()
{
TriggerStub positive = new TriggerStub("positive");
TriggerStub negative = new TriggerStub("negative");
ValueSpy <float> spy = new ValueSpy <float>(Combine.TriggersToAxis(positive, negative));
spy.WaitFrame();
spy.AssertNothingHappened();
positive.Update(true);
spy.WaitFrame();
spy.AssertWasUpdatedTo(1);
negative.Update(true);
spy.WaitFrame();
spy.AssertWasUpdatedTo(0);
positive.Update(false);
spy.WaitFrame();
spy.AssertWasUpdatedTo(-1);
spy.WaitFrame();
spy.AssertNothingHappened();
}