'Test the _has_beta helper.'

def test_has_beta(self):

    assert _has_beta('5.0', {'5.0b3': '2011-06-01'})
    assert (not _has_beta('6.0', {'5.0b3': '2011-06-01'}))
    assert (not _has_beta('5.5', {'5.0b3': '2011-06-01'}))
    assert _has_beta('5.7', {'5.7b1': '2011-06-01'})
    assert _has_beta('11.0', {'11.0b7': '2011-06-01'})
    assert (not _has_beta('10.0', {'11.0b7': '2011-06-01'}))
