def test_cython_inner_join(self): left = a_([0, 1, 2, 1, 2, 0, 0, 1, 2, 3, 3], dtype=np.int64) right = a_([1, 1, 0, 4, 2, 2, 1, 4], dtype=np.int64) max_group = 5 ls, rs = _join.inner_join(left, right, max_group) exp_ls = left.argsort(kind='mergesort') exp_rs = right.argsort(kind='mergesort') exp_li = a_([0, 1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8]) exp_ri = a_([0, 0, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 5, 4, 5, 4, 5]) exp_ls = exp_ls.take(exp_li) exp_ls[exp_li == -1] = -1 exp_rs = exp_rs.take(exp_ri) exp_rs[exp_ri == -1] = -1 self.assert_numpy_array_equal(ls, exp_ls, check_dtype=False) self.assert_numpy_array_equal(rs, exp_rs, check_dtype=False)