我正在尝试为一个看起来像这样的方法编写一个单元测试：
public int Save(IEnumerable<int> addedIds,IEnumerable<int> removedIds)
{
var existingIds = repository.Get();
IEnumerable<int> ids = existingIds.Except(removedIds).Union(addedIds));
return repository.Create(ids);
}
Moq的测试看起来像这样：
repository.Setup(r => r.Get()).Returns(CreateList()); service.Save(addedIds,removedIds); repository.Verify(r => r.Create(It.Is<IEnumerable<int>>(l => VerifyList(l))));
Expected invocation on the mock at least once,but was never
performed:
r => r.Create(It.Is<IEnumerable'1>(list => VerifyList(list)))Performed invocations:
IRepo.Create(System.Linq.Enumerable+<UnionIterator>d__88'1[System.Int32])
由于调用的类型不是IEnumerable< int>但实际上是System.Linq.Enumerable< UnionIterator> d__88’1 [System.Int32]),测试失败. (逐步完成测试,一切正常,结果如预期)
如果我在测试中的方法中调用ids.ToList(),结果如下：
Expected invocation on the mock at least once,but was never performed:
r => r.Create(It.Is<List'1>(l => VerifyList(l)))Performed invocations:
IRepo.Create(System.Collections.Generic.List'1[System.Int32])
这有什么办法吗？或者我做错了什么？
编辑：事实证明我在我的VerifyList方法中有一个错误,所以它返回false,但是Moq没有给我这些信息.类型差异是红鲱鱼..
解决方法
这似乎有效.但是做了一些假设.猜猜验证方法可能更好. =)
[Test]
public void Test()
{
// SETUP
Mock<IRepository> repository = new Mock<IRepository>();
Service service = new Service(repository.Object);
repository.Setup(r => r.Get()).Returns(CreateList());
IEnumerable<int> addedIds = new[]{1,2};
IEnumerable<int> removedIds = new[]{3,4};
service.Save(addedIds,removedIds);
repository.Verify(r => r.Create(It.Is<IEnumerable<int>>(l => VerifyList(l))));
}
private static bool VerifyList(IEnumerable<int> enumerable)
{
return enumerable.Contains(1) && enumerable.Contains(2) && enumerable.Contains(5);
}
private IEnumerable<int> CreateList()
{
return new[] { 3,4,5 };
}
public interface IRepository
{
IEnumerable<int> Get();
int Create(IEnumerable<int> id);
}
public class Service
{
public Service(IRepository repository)
{
this.repository = repository;
}
private IRepository repository;
public int Save(IEnumerable<int> addedIds,IEnumerable<int> removedIds)
{
var existingIds = repository.Get();
IEnumerable<int> ids = existingIds.Except(removedIds).Union(addedIds);
return repository.Create(ids);
}
