public async Task Should_Throw_If_Stack_Empty()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
// When
var result = await Record.ExceptionAsync(async() => await sut.PopModal()).ConfigureAwait(false);
// Then
result.Should().BeOfType <InvalidOperationException>();
result?.Message.Should().Be("Stack is empty.");
}
public async Task Should_Receive_Pop_Modal()
{
// Given, When
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushModal(new NavigableViewModelMock());
// When
await sut.PopModal();
// Then
await sut.View.Received().PopModal();
}
public async Task Should_Return_Unit()
{
// Given, When
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushModal(new NavigableViewModelMock());
// When
var result = await sut.PopModal();
// Then
result.Should().BeOfType <Unit>();
}
public async Task Should_Push_And_Pop(int amount)
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushModal(new NavigableViewModelMock(), "modal", amount);
sut.ModalStack.FirstAsync().Wait().Count.Should().Be(amount);
await sut.PopModal(amount);
// When
var result = await sut.ModalStack.FirstAsync();
// Then
result.Should().BeEmpty();
}
public async Task Should_Pop_Modal()
{
// Given
ViewStackService sut = new ViewStackServiceFixture();
await sut.PushModal(new NavigableViewModelMock());
// When
var item = await sut.ModalStack.FirstAsync();
item.Count.Should().Be(1);
await sut.PopModal();
// Then
item = await sut.ModalStack.FirstAsync();
item.Should().BeEmpty();
}
