如何避免每次考试的TestFixtures安排重复？

Question

我有很多测试，这些测试都安排了一些TestFixtures，我发现我经常重复这个安排代码。每个测试的前几行几乎是相同的。

是否有一种方法可以在所有测试之间声明一个共享的TestFixture，同时仍然在每个测试之间“重置”它们，从而保持测试的独立性？

public class MyClassTests
{
    private readonly Mock<ICoolService> _mockCoolService;
    private readonly Mock<IGreatService> _mockGreatService;
    private readonly Mock<INiceService> _mockNiceService;
    private readonly MyClass _controller;

    public MyClassTests(){

        //initialize the services.

        _controller = new MyClass(_mockCoolService.Object, _mockGreatService.Object, _mockNiceService.Object);
    }

    [Fact]
    public async Task MyTest_ShouldDoThis(){
        var batchName = TestFixture.Create<string>();
        var documentName = TestFixture.Create<string>();
        var controlId = TestFixture.Create<int>();

        _mockCoolService.Setup(x=>x.ACoolMethod(batchName, documentName)).Returns(batchName)

        var result = _controller.DoThis()

        //VerifyAll
    }

    [Fact]
    public async Task MyTest_ShouldDoThat(){
        var batchName = TestFixture.Create<string>();
        var documentName = TestFixture.Create<string>();
        var controlId = TestFixture.Create<int>();

        _mockGreatService.Setup(x=>x.AGreatMethod(batchName, documentName)).Returns(batchName)

        var result = _controller.DoThat()

        //VerifyAll
    }

    [Fact]
    public async Task MyTest_ShouldDoAnotherThing(){
        var batchName = TestFixture.Create<string>();
        var documentName = TestFixture.Create<string>();
        var controlId = TestFixture.Create<int>();

        _mockNiceService.Setup(x=>x.ANiceMethod(batchName, documentName)).Returns(batchName)

        var result = _controller.DoAnotherThing()

        //VerifyAll
    }
}

Answer 1

xUnit文档建议将这样的代码放在构造函数中：

xUnit.net为每个正在运行的测试创建测试类的一个新实例，因此放置在测试类构造函数中的任何代码都将为每个测试运行。

xUnit文档:测试之间的共享上下文