MsTest：每次运行测试方法时实际值都会增加

Question

这是我的测试class

[TestClass]
public class FooServiceTest
{
    private IYourRepository _yourRepository;

    [TestInitialize]
    public void Initialize()
    {
        _yourRepository = new Mock<YourRepository>().Object;

    }

    [TestMethod]
    public void GetPushableEntries_gets_all_pushable_entries()
    {
        var yourObjectList = new List<YourObject>
        {
            new WaitingQueue
            {                   
                ProfileId = 26,
                IsDeleted = false,
                Pushable = true
            },
            new WaitingQueue
            {                    
                ProfileId = 27,
                IsDeleted = false,
                Pushable = true
            },
            new WaitingQueue
            {                   
                ProfileId = 28,
                IsDeleted = false,
                Pushable = false
            }

        };

        foreach (var yourObject in yourObjectList)
        {
            _yourRepository.Create(yourObject);
        }

        var pushableEntries = _yourRepository.GetList(x => x.Pushable);
        pushableEntries.Count.ShouldEqual(2);
        pushableEntries.ShouldNotBeNull();
        pushableEntries.ShouldBe<IReadOnlyCollection<WaitingQueue>>();

    }

}

这里是ShouldEqual方法

public static T ShouldEqual<T>(this T actual, object expected)
{
    Assert.AreEqual(expected, actual);
    return actual;
}

这里是 GetList 方法

public IReadOnlyCollection<T> GetList(Expression<Func<T, bool>> @where, params Expression<Func<T, object>>[] nav)
{
    using (var dbContext = new MyDbContext())
    {
        return GetFiltered(dbContext, nav).Where(where).ToList();
    }
}

每次我运行GetPushableQueues_gets_all_pushable_entries()方法

实际值增加2

Assert.AreEqual failed. Expected:<2>. Actual:<2>. //first run
Assert.AreEqual failed. Expected:<2>. Actual:<4>. //second run
Assert.AreEqual failed. Expected:<2>. Actual:<6>. //third run

即使我清理测试项目并重建它，这个问题仍然存在。知道为什么会这样吗？我错过了什么？

注意：还有其他测试方法使用_yourRepository并调用Create方法创建实体。

Answer 1

问题是您实际上在那里使用了某种存储库。你不要嘲笑它。 _yourRepository = new Mock< YourRepository >().Object;

应该是 _yourRepository = new Mock< IYourRepository >().Object;

并且您从 IYourRepository 接口使用的所有方法也应该 mocked/set。

MsTest：每次运行测试方法时实际值都会增加

MsTest : Actual value increases everytime test method runs

c#

unit-testing

mstest

moq

mocking