模拟获取覆盖方法使xUnit.NET中的另一个测试失败

如何解决模拟获取覆盖方法使xUnit.NET中的另一个测试失败

我使用xUnit框架进行了两项测试：

private IRepo myRepo;

public MyTests() { myRepo = Mock.Of<IRepo>(); ... }

[Fact]
public async void NoTenanttest()
{
  var validJson = GetValidJson();
  Mock.Get(myRepo).Setup(t => t.FindByIdAsync(It.IsAny<string>())).Returns(Task.Fromresult(null as MyObject));
  var request = TestFactory.CreateHttpRequest(new Dictionary<string,string> { { "tenant","abc" } },"https://test.com",validJson);
  var ex = await Assert.ThrowsAsync<Exception>(() => myAzureFunc.Run(request,mLog,mCtx));
  Assert.Equal("FindByIdAsync(abc) returned null",ex.Message,true);
}

[Fact]
public async void NoCompanytest()
{
  var validJson = GetValidJson();
  Mock.Get(myRepo).Setup(t => t.FindByIdAsync(It.IsAny<string>())).Returns(Task.Fromresult(new MyObject()));

 ...
 Mock.Get(myManager).Setup(w => w.GetIdAsync(It.IsAny<MyObject>()).Returns(Task.Fromresult(null as string));

  var request = TestFactory.CreateHttpRequest(new Dictionary<string,validJson);
  var ex = await Assert.ThrowsAsync<Exception>(() => mPaymentWebhook.Run(request,mCtx));
  Assert.Equal("No item found for abc",true);
}

似乎xUnit按字母顺序执行测试。并且以某种方式Setup中的Mock.Get(myRepo)没有被覆盖，然后NoTenantTest失败（我收到另一条错误消息）

如何创建IRepo对象的新实例以避免发生这种情况？

如果我分别执行测试，那么它将运行，如果全部运行，则将失败。

解决方法

在单独的测试方法中创建它们（模拟），而不是将其作为在构造函数中初始化的共享资源。

如果测试是异步的，请使用async Task代替async void

[Fact]
public async Task NoTenantTest() {
    var validJson = GetValidJson();
    IRepo myRepo = Mock.Of<IRepo>();
    Mock.Get(myRepo)
        .Setup(t => t.FindByIdAsync(It.IsAny<string>()))
        .Returns(Task.FromResult(null as MyObject));
    var request = TestFactory.CreateHttpRequest(new Dictionary<string,string> { { "tenant","abc" } },"https://test.com",validJson);
    var ex = await Assert.ThrowsAsync<Exception>(() => myAzureFunc.Run(request,mLog,mCtx));
    Assert.Equal("FindByIdAsync(abc) returned null",ex.Message,true);
}

[Fact]
public async Task NoCompanyTest() {
    var validJson = GetValidJson();
    IRepo myRepo = Mock.Of<IRepo>();
    Mock.Get(myRepo)
        .Setup(t => t.FindByIdAsync(It.IsAny<string>()))
        .Returns(Task.FromResult(new MyObject()));

    ...
    Mock.Get(myManager)
        .Setup(w => w.GetIdAsync(It.IsAny<MyObject>())
        .Returns(Task.FromResult(null as string));

    var request = TestFactory.CreateHttpRequest(new Dictionary<string,validJson);
    var ex = await Assert.ThrowsAsync<Exception>(() => mPaymentWebhook.Run(request,mCtx));
    Assert.Equal("No item found for abc",true);
}