public async Task GetShoppingBooksReturnsBooks()
        {
            // Arragne
            var fackRootObject = this.fixture.Create <Models.RootObject>();

            A.CallTo(() => _fakeServiceClient.GetBooks())
            .Returns(fackRootObject);

            // Act
            var actual = await _sut.GetShoppingBooks();

            // Assert
            actual.Should().HaveCountGreaterOrEqualTo(1);
        }