无法将 [] 索引应用于“Castle.Proxies.RangeProxy”类型的表达式

Question

是什么导致了这个异常？我正在尝试Moq用来模拟Microsoft.Office.Interop.Excel.Range. 我想在Range里面嵌套另一个嘲笑。但是当我尝试访问嵌套异常时，会抛出异常。

例外

无法将 [] 索引应用于“Castle.Proxies.RangeProxy”类型的表达式

代码

[TestMethod]

public void RangeProxyIndexTest()

{

    // creating first range

    var cell1 = new Moq.Mock<Range>();

    cell1.Setup(c => c.Value2).Returns("1");

    var range1Mock = new Moq.Mock<Range>();

    range1Mock.SetupGet(r => r[1, Moq.It.IsAny<Object>()]).Returns(cell1.Object);

    var range1 = range1Mock.Object;

    // creating second range

    var cell2 = new Moq.Mock<Range>();

    cell2.Setup(c => c.Value2).Returns("2");

    var range2Mock = new Moq.Mock<Range>();

    range2Mock.SetupGet(r => r[1, Moq.It.IsAny<Object>()]).Returns(cell2.Object);

    var range2 = range2Mock.Object;

    // merging both ranges into 1

    var range3Mock = new Moq.Mock<Range>();

    range3Mock.SetupGet(r => r[1, Moq.It.IsAny<Object>()]).Returns(range1);

    range3Mock.SetupGet(r => r[2, Moq.It.IsAny<Object>()]).Returns(range2);

    var range3 = range3Mock.Object;

    // testing succeeds

    Assert.AreEqual("1", range1[1].Value2);

    Assert.AreSame(range1, range3[1]);

    Assert.AreEqual("2", range2[1].Value2);

    Assert.AreSame(range2, range3[2]);

    // exceptions are thrown here

    Assert.AreEqual("1", range3[1][1].Value2);

    Assert.AreEqual("2", range3[2][1].Value2);

}

Answer 1

虽然情况不同，但这个异常的原因和你打开的另一个问题完全一样。将您的验证部分更改为：Assert.AreEqual("1",&nbsp;(range3[1]&nbsp;as&nbsp;Range)[1].Value2); Assert.AreEqual("2",&nbsp;(range3[2]&nbsp;as&nbsp;Range)[1].Value2);