public async Task InitAsync_DoesNotSetLoadingFailed_IfSuccessfull()
{
BookReference bookReference = new BookReference();
Book book = new Book();
_bookServiceMock.Setup(s => s.LoadBookAsync(bookReference)).Returns(Task.FromResult(book)).Verifiable();
await _viewModel.InitAsync(bookReference);
Assert.IsFalse(_viewModel.LoadingFailed);
_bookServiceMock.Verify();
_eventAggregator.Verify();
}