public void NavigateToBack_Test()
{
using (var container = new UnityContainer())
{
FakeAppContent fakeAppContent = new Fakes.FakeAppContent()
{
Value = 10
};
AppMainViewModel mainAppViewModel = new AppMainViewModel();
FakeAppContent homeContent = new Fakes.FakeAppContent()
{
Value = -1
};
var target = new NavigationService(container, mainAppViewModel, homeContent);
Assert.IsFalse(target.CanNavigateBack());
target.NavigateHome();
Assert.IsTrue(homeContent.NavigationIn);
Assert.IsFalse(target.CanNavigateBack());
target.NavigateTo(fakeAppContent); //10
Assert.IsTrue(fakeAppContent.NavigationIn);
Assert.IsTrue(homeContent.NavigationOut);
Assert.IsTrue(target.CanNavigateBack());
homeContent.NavigationOut = false; homeContent.NavigationIn = false; fakeAppContent.NavigationOut = false;
target.NavigateBack(); //-1
Assert.IsTrue(homeContent.NavigationIn);
Assert.IsTrue(fakeAppContent.NavigationOut);
Assert.IsFalse(target.CanNavigateBack());
Assert.AreEqual(-1, (mainAppViewModel.AppContent as Fakes.FakeAppContent).Value);
target.NavigateTo(fakeAppContent); //10
Assert.IsTrue(target.CanNavigateBack());
target.NavigateTo(typeof(Fakes.FakeAppContent)); //0
Assert.IsTrue(target.CanNavigateBack());
target.NavigateTo(new Fakes.FakeAppContent()
{
Value = 15
}); //15
Assert.IsTrue(target.CanNavigateBack());
target.NavigateBack(); //0
Assert.AreEqual(0, (mainAppViewModel.AppContent as Fakes.FakeAppContent).Value);
Assert.IsTrue(target.CanNavigateBack());
target.NavigateBack(); //10
Assert.AreEqual(10, (mainAppViewModel.AppContent as Fakes.FakeAppContent).Value);
Assert.IsTrue(target.CanNavigateBack());
target.NavigateBack(); //-1
Assert.AreEqual(-1, (mainAppViewModel.AppContent as Fakes.FakeAppContent).Value);
Assert.IsFalse(target.CanNavigateBack());
}
}