'Deletion by filter strings should work.'

def test_pattern_matching_key_deletion(self):

    del self._test_header['DP1.A*...']
    assert (len(self._test_header) == 2)
    assert (list(self._test_header)[0] == 'DP1.NAXIS')
    assert (self._test_header[0] == 2)
    assert (list(self._test_header)[1] == 'DP1.NAUX')
    assert (self._test_header[1] == 2)
