测试调用内部调用私有方法的 public 方法的业务逻辑

Question

我在接口中有一个方法，如下所示：

Task<bool> IsStudentAuthorizedAsync(StudentEntity studentEntity);

实施：

public async Task<bool> IsStudentAuthorizedAsync(StudentEntity studentEntity)
{
    // Check if the Student is activated for course
    var checkStudentForCourseTask = await this.CheckIfStudentIsEnabledForCourseAsync(studentEntity).ConfigureAwait(false);

    return checkStudentForCourseTask;
}

private async Task<bool> CheckIfStudentIsEnabledForCourseAsync(StudentEntity studentEntity)
{
    var result = await this.tableStorage.RetrieveAsync<StudentTableEntity>(StudentEntity.Id, StudentEntity.CourseId, this.tableName).ConfigureAwait(false);

    return result != null && result.IsActivated;
}

CheckIfStudentIsEnabledForCourseAsync 是通过查询 Azure Table 存储进行检查的私有方法。

我正在尝试对 IsStudentAuthorizedAsync 进行单元测试，但在初始设置调用后无法继续。

[TestClass]
public class AuthorizeStudentServiceBusinessLogicTests
{
    private Mock<IAuthorizeStudentServiceBusinessLogic> authorizeStudentServiceBusinessLogic;

    [TestMethod]
    public async Task IsStudentAuthorizedForServiceAsyncTest()
    {
        this.authorizeStudentServiceBusinessLogic.Setup(
                x => x.IsStudentAuthorizedAsync(It.IsAny<StudentEntity>()))
            .Returns(new Task<bool>(() => false));

        // What to do next!!!
    }
}

非常感谢任何帮助，它们会让我开始这条道路。提前致谢。

此致。

Answer 1

您必须模拟对存储的访问，而不是您的业务逻辑。为此，您必须再创建一层：

public class Storage : IStorage {
    public Task<Student> RetrieveAsync();
}

public class BusinessLogic
{
    public BusinessLogic(IStorage storage)
    {
        _storage = storage;
    }

    public async Task<bool> IsStudentAuthorizedAsync(StudentEntity studentEntity)
    {
        // Check if the Student is activated for course
        var checkStudentForCourseTask = await this.CheckIfStudentIsEnabledForCourseAsync(studentEntity).ConfigureAwait(false);

        return checkStudentForCourseTask;
    }

    private async Task<bool> CheckIfStudentIsEnabledForCourseAsync(StudentEntity studentEntity)
    {
        var result = await _storage.RetrieveAsync<StudentTableEntity>(StudentEntity.Id, StudentEntity.CourseId, this.tableName).ConfigureAwait(false);

        return result != null && result.IsActivated;
    }
}

然后您就可以模拟对您的存储的访问：

[TestMethod]
public void IsStudentAuthorizedForServiceAsyncTest()
{
    Mock<IStorage> storageMock = new Mock<IStorage>();
    storageMock.Setup(x => x.Retrieve()).Returns(new Task<Student>()); // Return whatever you need
    var target = new BusinessLogic(storageMock.Object);

    var actual = target.IsStudentAuthorizedAsync();

    // Assert
}

测试调用内部调用私有方法的 public 方法的业务逻辑

Test a business logic which calls a public method that internally calls a private method

unit-testing

asynchronous

moq