'Test xl_range_abs()'

def test_xl_range_abs(self):

    tests = [(0, 0, 9, 0, '$A$1:$A$10'), (1, 2, 8, 2, '$C$2:$C$9'), (0, 0, 3, 4, '$A$1:$E$4'), (0, 0, 0, 0, '$A$1:$A$1'), (0, 0, 0, 1, '$A$1:$B$1'), (0, 2, 0, 9, '$C$1:$J$1'), (1, 0, 2, 0, '$A$2:$A$3'), (9, 0, 1, 24, '$A$10:$Y$2'), (7, 25, 9, 26, '$Z$8:$AA$10'), (1, 254, 1, 255, '$IU$2:$IV$2'), (1, 256, 0, 16383, '$IW$2:$XFD$1'), (0, 0, 1048576, 16384, '$A$1:$XFE$1048577')]
    for (first_row, first_col, last_row, last_col, cell_range) in tests:
        exp = cell_range
        got = xl_range_abs(first_row, first_col, last_row, last_col)
        self.assertEqual(got, exp)
