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