def test_is_null(self):
x = np.random.RandomState(42).randn(5, 6)
x[x < 0] = np.nan
original = DataArray(x, [-np.arange(5), np.arange(6)], ['x', 'y'])
expected = DataArray(pd.isnull(x), [-np.arange(5), np.arange(6)],
['x', 'y'])
self.assertDataArrayIdentical(expected, original.isnull())
self.assertDataArrayIdentical(~expected, original.notnull())
def test_is_null(self):
x = np.random.RandomState(42).randn(5, 6)
x[x < 0] = np.nan
original = DataArray(x, [-np.arange(5), np.arange(6)], ['x', 'y'])
expected = DataArray(pd.isnull(x), [-np.arange(5), np.arange(6)],
['x', 'y'])
self.assertDataArrayIdentical(expected, original.isnull())
self.assertDataArrayIdentical(~expected, original.notnull())
