test_range.py 文件源码

def test_intersection(self):
        # intersect with Int64Index
        other = Index(np.arange(1, 6))
        result = self.index.intersection(other)
        expected = np.sort(np.intersect1d(self.index.values, other.values))
        self.assert_numpy_array_equal(result, expected)

        result = other.intersection(self.index)
        expected = np.sort(np.asarray(np.intersect1d(self.index.values,
                                                     other.values)))
        self.assert_numpy_array_equal(result, expected)

        # intersect with increasing RangeIndex
        other = RangeIndex(1, 6)
        result = self.index.intersection(other)
        expected = np.sort(np.intersect1d(self.index.values, other.values))
        self.assert_numpy_array_equal(result, expected)

        # intersect with decreasing RangeIndex
        other = RangeIndex(5, 0, -1)
        result = self.index.intersection(other)
        expected = np.sort(np.intersect1d(self.index.values, other.values))
        self.assert_numpy_array_equal(result, expected)