Unable to verify method called via Xunit Mock-CodePudding

Using Moq 4.18.1 to test my C# code, I'm wanting to verify a method calls another method. In the class being tested I have this:

public class IntegratedPlatformRepository : PvRepository<OutputDTO>, IIntegratedPlatformRepository
{
    protected virtual async Task IpSpecificGetterExtras(OutputDTO dto, CancellationToken cancellationToken) { }

    public async Task<OutputDTO> GetAsync(Guid uid, CancellationToken cancellationToken = default) {
       var dto = ...
       await IpSpecificGetterExtras(dto, cancellationToken);
       ...
    }

I want to ensure that IpSpecificGetterExtras is called when GetAsync is called, so I tried this:

[Fact]
public async Task GetAsync_Calls_IpSpecificGetterExtras()
{
    // Arrange
    var mock = new Mock<IntegratedPlatformRepository> {
        CallBase = true
    };

    // Act
    await _repo.GetAsync(Guid.NewGuid().ToString());

    // Assert
    mock
      .Protected()
      .Verify<Task>(
          "IpSpecificGetterExtras", Times.Once(),
          ItExpr.IsAny<OutputDTO>(), ItExpr.IsAny<CancellationToken>()
    );
}

If I simply run the test it fails saying the invocation wasn't performed. If I debug the test and set a breakpoint in IpSpecificGetterExtras the breakpoint is hit and I can step through the method, so it's definitely being called.

CodePudding user response：

Based on the shown example mock was not invoked.

The test needs to be refactored to allow it to flow to completion so that it can be verified as expected.

[Fact]
public async Task GetAsync_Calls_IpSpecificGetterExtras() {
    // Arrange
    var mock = new Mock<IntegratedPlatformRepository> {
        CallBase = true
    };

    mock.Protected()
        .Setup<Task>("IpSpecificGetterExtras",
             ItExpr.IsAny<OutputDTO>(), ItExpr.IsAny<CancellationToken>())
        .Returns(Task.CompletedTask);

    var subject = mock.Object;

    // Act
    await subject.GetAsync(Guid.NewGuid().ToString());

    // Assert
    mock
        .Protected()
        .Verify<Task>(
            "IpSpecificGetterExtras", Times.Once(),
            ItExpr.IsAny<OutputDTO>(), ItExpr.IsAny<CancellationToken>()
        );
}