Empty dummy collections

Question

In this test, I expected dummyVar to be empty. However, regardless of what I set OmitAutoProperty to, it is not.

Is this correct behavior and why? What would be the AutoFixture way of creating an empty dummy collection?

[Fact]
public void ShouldBeEmpty()
{
    var fixture = new Fixture();
    fixture.Customize(new AutoMoqCustomization());
    fixture.OmitAutoProperties = true;
    var dummyVar = fixture.Create<IEnumerable<IComparable>>();
    Assert.Empty(dummyVar);
}

Answer 1

This is by design in AutoFixture 3.0. However, if you rather want enumerables to be empty, you can configure that as well.

If you explicitly want only IEnumerable<IComparable> (but not other collections) to be empty, an easier way is to do this:

fixture.Inject<IEnumerable<IComparable>>(new IComparable[0]);

OmitAutoProperties control whether or not object properties (and fields) are populated or not. It doesn't affect the size of collections. (IEnumerable<T> defines no writable properties.)

RepeatCount controls the size of collections, but as the previously mentioned issue reports, you cant set RepeatCount to 0 (again by design).