无法让DbSet.Find与Moq一起使用（使用实体框架）

Question

由于某种原因，此代码一直失败。任何可以告诉我原因的人：

        var activeLoans = new List<ActiveLoan> {
            new ActiveLoan{
               ID = 1,
               CaseType = "STL",
               LoanCode = 0
            },
            new ActiveLoan{
               ID = 2,
               CaseType = "STL",
               LoanCode = 0
            },
            new ActiveLoan{
               ID = 3,
               CaseType = "STL",
               LoanCode = 0
            }
        }.AsQueryable();

        var activeLoanMockSet = new Mock<DbSet<ActiveLoan>>(); 
        activeLoanMockSet.As<IQueryable<ActiveLoan>>().Setup(m => m.Provider).Returns(activeLoans.Provider);
        activeLoanMockSet.As<IQueryable<ActiveLoan>>().Setup(m => m.Expression).Returns(activeLoans.Expression);
        activeLoanMockSet.As<IQueryable<ActiveLoan>>().Setup(m => m.ElementType).Returns(activeLoans.ElementType);
        activeLoanMockSet.As<IQueryable<ActiveLoan>>().Setup(m => m.GetEnumerator()).Returns(activeLoans.GetEnumerator());
        mockContext.Setup(c => c.ActiveLoans).Returns(activeLoanMockSet.Object);


        // This is the line that fails
        Assert.AreNotEqual(mockContext.Object.ActiveLoans.Find( 1 ), null);

当我说失败时，我的意思是单元测试这是失败的一部分。

Answer 1

我认为您还需要设置IDbSet::Find。

activeLoanMockSet.Setup(m => m.Find(It.IsAny<object[]>()))
    .Returns<object[]>(ids => activeLoans.FirstOrDefault(d => d.ID == (int)ids[0]));