public async Task Should_Return_Last_Element()
{
// Given
var fixture = new ViewStackServiceFixture();
fixture.PushPage(new PageViewModelMock("1")).Subscribe();
fixture.PushPage(new PageViewModelMock("2")).Subscribe();
// When
var result = await fixture.ViewStackService.TopPage();
// Then
result.Should().BeOfType <PageViewModelMock>();
result.Id.Should().Be("2");
}
public async Task Should_Return_Last_Element()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushPage(new PageViewModelMock("1"));
await sut.PushPage(new PageViewModelMock("2"));
// When
var result = await sut.TopPage();
// Then
result.ShouldBeOfType <PageViewModelMock>();
result.Id.ShouldBe("2");
}
public async Task Should_Clear_Navigation_Stack_If_Reset()
{
// Given
ViewStackService sut = new ViewStackServiceFixture().WithView(Substitute.For <IView>());
// When
await sut.PushPage(new PageViewModelMock(), pages : 3);
await sut.PushPage(new PageViewModelMock(), resetStack : true);
var result = await sut.PageStack.FirstOrDefaultAsync();
// Then
result.ShouldHaveSingleItem();
}
public void Should_Receive_Push_Page()
{
// Given
var fixture = new ViewStackServiceFixture();
// When
fixture.PushPage(new PageViewModelMock());
// Then
fixture.View.Received().PushPage(Arg.Any <IPageViewModel>(), null, false, true);
}
public async Task Should_Receive_Push_Page()
{
// Given
ViewStackService sut = new ViewStackServiceFixture().WithView(Substitute.For <IView>());
// When
await sut.PushPage(new PageViewModelMock());
// Then
sut.View.Received().PushPage(Arg.Any <IPageViewModel>(), null, false, true);
}
public async Task Should_Not_Pop()
{
// Given
ViewStackService sut = new ViewStackServiceFixture().WithView(Substitute.For <IView>());
await sut.PushPage(new PageViewModelMock());
// When
await sut.TopPage();
// Then
await sut.View.DidNotReceive().PopPage();
}
public async Task Should_Return_Unit()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushPage(new PageViewModelMock());
// When
var result = await sut.PopPage();
// Then
result.ShouldBeOfType <Unit>();
}
public async Task Should_Not_Pop()
{
// Given
var fixture = new ViewStackServiceFixture();
fixture.PushPage(new PageViewModelMock()).Subscribe();
// When
fixture.ViewStackService.TopPage().Subscribe();
// Then
await fixture.View.DidNotReceive().PopPage();
}
public async Task Should_Return_Unit()
{
// Given
var fixture = new ViewStackServiceFixture();
fixture.PushPage(new PageViewModelMock()).Subscribe();
// When
var result = await fixture.ViewStackService.PopPage();
// Then
result.Should().BeOfType <Unit>();
}
public async Task Should_Push_Page_On_Stack()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
// When
await sut.PushPage(new PageViewModelMock());
var result = await sut.PageStack.FirstAsync();
// Then
result.ShouldNotBeEmpty();
result.Count.ShouldBe(1);
}
public async Task Should_Push_Page()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
// When
await sut.PushPage(new PageViewModelMock());
var result = await sut.TopPage();
// Then
result.ShouldNotBeNull();
result.ShouldBeOfType <PageViewModelMock>();
}
public async Task Should_Have_One_Item_On_Stack()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushPage(new PageViewModelMock(), pages : 3);
await sut.PopToRootPage();
// When
var result = await sut.PageStack.FirstOrDefaultAsync();
// Then
result.ShouldHaveSingleItem();
}
public async Task Should_Return_Single_Notification()
{
// Given
int count = 0;
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushPage(new PageViewModelMock(), pages : 3);
sut.View.PagePopped.Subscribe(_ =>
{
count++;
});
// When
await sut.PopToRootPage();
// Then
count.ShouldBe(1);
}
public async Task Should_Throw_If_View_Model_Null()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
// When
var result = await Should.ThrowAsync <ArgumentNullException>(async() => await sut.PushPage(null)).ConfigureAwait(false);
// Then
result.ParamName.ShouldBe("page");
}