public void GivenX_WhenDropDownListIsRequested_ReturnsY()
    {
        // Arrange
        var exampleRepositoryStub = CreateRepositoryStub(X);
        var exampleController     = new ExampleController(exampleRepositoryStub);
        // Act
        var result = exampleController.DropDownList();

        // Assert
        Assert.That(result, Is.Equal(Y));
    }