public void GoForwardMultipleTimesNavigatesForward()
{
// Prepare
RegionNavigationJournal target = new RegionNavigationJournal();
Mock<INavigateAsync> mockNavigationTarget = new Mock<INavigateAsync>();
target.NavigationTarget = mockNavigationTarget.Object;
Uri uri1 = new Uri("Uri1", UriKind.Relative);
RegionNavigationJournalEntry entry1 = new RegionNavigationJournalEntry() { Uri = uri1 };
Uri uri2 = new Uri("Uri2", UriKind.Relative);
RegionNavigationJournalEntry entry2 = new RegionNavigationJournalEntry() { Uri = uri2 };
Uri uri3 = new Uri("Uri3", UriKind.Relative);
RegionNavigationJournalEntry entry3 = new RegionNavigationJournalEntry() { Uri = uri3 };
target.RecordNavigation(entry1);
target.RecordNavigation(entry2);
target.RecordNavigation(entry3);
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri1, It.IsAny<Action<NavigationResult>>()))
.Callback<Uri, Action<NavigationResult>>((u, c) => c(new NavigationResult(null, true)));
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri2, It.IsAny<Action<NavigationResult>>()))
.Callback<Uri, Action<NavigationResult>>((u, c) => c(new NavigationResult(null, true)));
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri3, It.IsAny<Action<NavigationResult>>()))
.Callback<Uri, Action<NavigationResult>>((u, c) => c(new NavigationResult(null, true)));
target.GoBack();
target.GoBack();
// Act
target.GoForward();
target.GoForward();
// Verify
Assert.IsTrue(target.CanGoBack);
Assert.IsFalse(target.CanGoForward);
Assert.AreSame(entry3, target.CurrentEntry);
mockNavigationTarget.Verify(x => x.RequestNavigate(uri1, It.IsAny<Action<NavigationResult>>()), Times.Once());
mockNavigationTarget.Verify(x => x.RequestNavigate(uri2, It.IsAny<Action<NavigationResult>>()), Times.Exactly(2));
mockNavigationTarget.Verify(x => x.RequestNavigate(uri3, It.IsAny<Action<NavigationResult>>()), Times.Once());
}
public void GoForwardDoesNotChangeStateWhenNavigationFails()
{
// Prepare
RegionNavigationJournal target = new RegionNavigationJournal();
Mock<INavigateAsync> mockNavigationTarget = new Mock<INavigateAsync>();
target.NavigationTarget = mockNavigationTarget.Object;
Uri uri1 = new Uri("Uri1", UriKind.Relative);
RegionNavigationJournalEntry entry1 = new RegionNavigationJournalEntry() { Uri = uri1 };
Uri uri2 = new Uri("Uri2", UriKind.Relative);
RegionNavigationJournalEntry entry2 = new RegionNavigationJournalEntry() { Uri = uri2 };
Uri uri3 = new Uri("Uri3", UriKind.Relative);
RegionNavigationJournalEntry entry3 = new RegionNavigationJournalEntry() { Uri = uri3 };
target.RecordNavigation(entry1);
target.RecordNavigation(entry2);
target.RecordNavigation(entry3);
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri1, It.IsAny<Action<NavigationResult>>(), null))
.Callback<Uri, Action<NavigationResult>, NavigationParameters>((u, c, n) => c(new NavigationResult(null, true)));
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri2, It.IsAny<Action<NavigationResult>>(), null))
.Callback<Uri, Action<NavigationResult>, NavigationParameters>((u, c, n) => c(new NavigationResult(null, true)));
mockNavigationTarget
.Setup(x => x.RequestNavigate(uri3, It.IsAny<Action<NavigationResult>>(), null))
.Callback<Uri, Action<NavigationResult>, NavigationParameters>((u, c, n) => c(new NavigationResult(null, false)));
target.GoBack();
// Act
target.GoForward();
// Verify
Assert.IsTrue(target.CanGoBack);
Assert.IsTrue(target.CanGoForward);
Assert.AreSame(entry2, target.CurrentEntry);
mockNavigationTarget.Verify(x => x.RequestNavigate(uri1, It.IsAny<Action<NavigationResult>>(), null), Times.Never());
mockNavigationTarget.Verify(x => x.RequestNavigate(uri2, It.IsAny<Action<NavigationResult>>(), null), Times.Once());
mockNavigationTarget.Verify(x => x.RequestNavigate(uri3, It.IsAny<Action<NavigationResult>>(), null), Times.Once());
}