mocking - 此测试是否正确使用了AutoFixture和Moq？

Question

此测试是否正确使用了AutoFixture和Moq？是否写得尽可能简洁？如预期的那样，测试失败，并在编写正确的实现后通过。

[Fact]
public void CustomerPropertyIsCorrect()
{
    var fixture = new AutoMoqFixture();

    var expected = fixture.Create<CardHolderCustomer>();
    var builderMock = fixture
        .Freeze<Mock<ICustomerAdapter>>()
        .Setup(x => x.BuildCustomer()).Returns(expected);

    var sut = fixture.Create<CardHolderViewModel>();
    var actual = sut.Customer;

    Assert.Equal(expected, actual);
}

Answer 1

看起来不错!但是，您也可以将其与xUnit.net declaratively一起使用extension 。

假设测试中使用的类型定义为:

public class CardHolderCustomer
{
}

public interface ICustomerAdapter
{
    CardHolderCustomer BuildCustomer();
}

public class CardHolderViewModel
{
    private readonly ICustomerAdapter adapter;

    public CardHolderViewModel(ICustomerAdapter adapter)
    {
        if (adapter == null)
            throw new ArgumentNullException("adapter");
        this.adapter = adapter;
    }

    public CardHolderCustomer Customer
    {
        get
        {
            return this.adapter.BuildCustomer();
        }
    }
}

原始测试可以写为:

[Theory, DomainTestConventions]
public void CustomerPropertyIsCorrect2(
    CardHolderCustomer expected,
    [Frozen]Mock<ICustomerAdapter> builderStub,
    CardHolderViewModel sut)
{
    builderStub
        .Setup(x => x.BuildCustomer())
        .Returns(expected);

    var actual = sut.Customer;

    Assert.Equal(expected, actual);
}

DomainTestConventionsAttribute定义为:

internal class DomainTestConventionsAttribute : AutoDataAttribute
{
    internal DomainTestConventionsAttribute()
        :base(new Fixture().Customize(new DomainTestConventions()))
    {
    }
}

DomainTestConventions定义为:

internal class DomainTestConventions : CompositeCustomization
{
    internal DomainTestConventions()
        :base(new AutoMoqCustomization())
    {
    }
}

请注意，DomainTestConventions源自CompositeCustomization，这基本上意味着您可以创建更多定制，并将它们作为参数添加到基本构造函数中。

您还可以阅读:

The order of AutoFixture Customizations matter

AutoData Theories with AutoFixture

Keep your unit tests DRY with AutoFixture Customizations

AutoFixture, xUnit.net, and Auto Mocking

希望能有所帮助。