public void EnumPreviousTest()
{
var model = new GenericStateModel <Fixture>(Fixture.Qux);
Assert.AreEqual(Fixture.Qux, model.GetCurrent());
model.Previous();
Assert.AreEqual(Fixture.Baz, model.GetCurrent());
model.Previous();
model.Previous();
Assert.AreEqual(Fixture.Foo, model.GetCurrent());
model.Previous();
model.Previous();
Assert.AreEqual(Fixture.Foo, model.GetCurrent());
}
public void PrimitiveTest()
{
var model1 = new GenericStateModel <int>();
model1.Change(2);
Assert.Throws <InvalidOperationException>(() => model1.Next());
Assert.Throws <InvalidOperationException>(() => model1.Previous());
var model2 = new GenericStateModel <bool>();
model2.Change(false);
Assert.Throws <InvalidOperationException>(() => model2.Next());
Assert.Throws <InvalidOperationException>(() => model2.Previous());
}