Method test_wrong_ddof

numpy/lib/tests/test_function_base.py:2619–2624

(self)

                               np.array([[np.nan, np.nan], [np.nan, np.nan]]))

    def test_wrong_ddof(self):
        with warnings.catch_warnings(record=True):
            warnings.simplefilter('always', RuntimeWarning)
            assert_array_equal(cov(self.x1, ddof=5),
                               np.array([[np.inf, -np.inf],
                                         [-np.inf, np.inf]]))

    def test_1D_rowvar(self):
        assert_allclose(cov(self.x3), cov(self.x3, rowvar=False))