How do I verify that the expected array is the actual array in MSTest?

Question

The following method fails:

[TestMethod]
public void VerifyArrays()
{
    int[] actualArray = { 1, 3, 7 };
    Assert.AreEqual(new int[] { 1, 3, 7 }, actualArray);
}

How do I make it pass without iterating over the collection?

Why did you post a question only to answer it with 1 minute of googling? Why post the question at all? Or is this more of a PSA? — Jeremy Roberts
– Jeremy Roberts, Commented Sep 23, 2009 at 17:08
Public Service Announcement... hmm... Following the lead of Jeff Atwood on making SO the canonical place for questions and answers. — Kevin Driedger
– Kevin Driedger, Commented Sep 25, 2009 at 13:24

Daniel Brückner · Accepted Answer · 2009-09-23 17:26:45Z

90

Microsoft has provided a helper class CollectionAssert.

[TestMethod]
public void VerifyArrays()
{
    int[] actualArray = { 1, 3, 7 };
    CollectionAssert.AreEqual(new int[] { 1, 3, 7 }, actualArray);
}

edited Sep 23, 2009 at 17:26

Daniel Brückner

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answered Sep 23, 2009 at 16:58

Kevin Driedger

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Daniel Brückner · Accepted Answer · 2009-09-23 17:24:16Z

9

You can use the Enumerable.SequenceEqual() method.

[TestMethod]
public void VerifyArrays()
{
    int[] actualArray = { 1, 3, 7 };
    int[] expectedArray = { 1, 3, 7 };

    Assert.IsTrue(actualArray.SequenceEqual(expectedArray));
}

answered Sep 23, 2009 at 17:24

Daniel Brückner

59.8k16 gold badges103 silver badges144 bronze badges

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