def test_no_dupe_types(self, Manifest):
    manifest = Manifest()
    assert (len(manifest.Default) == 2)
    manifest.Default.append('a')
    manifest.Default.append('a')
    assert (len(manifest.Default) == 3)
def test_no_dupe_types(self, Manifest):
    manifest = Manifest()
    assert (len(manifest.Default) == 2)
    manifest.Default.append('a')
    manifest.Default.append('a')
    assert (len(manifest.Default) == 3)