public async Task Should_Return_Correct_Type()
{
// Given
NavigatorState sut = new NavigatorStateFixture();
// When
var result = await sut.Push(new PageRoute <TestViewModel>(new RouteSettings()));
// Then
result.Should().BeOfType <PageRoute <TestViewModel> >();
}
public async Task Should_Receive_Push()
{
// Given
var navigator = Substitute.For <INavigator>();
NavigatorState sut = new NavigatorStateFixture().WithNavigator(navigator);
// When
await sut.Push(new PageRoute <TestViewModel>(new RouteSettings()));
// Then
await navigator.Received().Push(Arg.Any <PageRoute <TestViewModel> >());
}