Comparing Enum Value With Integer - Assert.AreEqual

Question

I have the following test for an enum:

[TestCase]
public void NoneIsDefaultTest()
{
    Assert.AreEqual(0, Command.None);
}

The idea is to ensure that no additions to the enum change the default value. However, the test fails with:

Expected: 0
But was:  None

Is Assert.AreEqual automatically applying .ToString()? How can I avoid this?

Edit: enum definition:

internal enum Command { None = 0, Build, Config, Reconfig, Help, Version }

Answer 1

Casting to int should be fine:

Assert.AreEqual(0, (int)Command.None);

Answer 2

AreEqual is not using ToString for the comparison, only when formatting the error message. Enums form a type distinct from the underlying value type, so the comparison 0.Equals(Command.None) returns false, since the enum value is not an int.

Answer 3

Casting to an int works, but if all you want to test is the default value (which is what was behind my question), you can use the default keyword:

[TestCase]
public void NoneIsDefaultTest()
{
    Assert.AreEqual(default(Command), Command.None);
}

It also has an intuitive feel, if the default itself is really what you're testing.