def test_concat(a):
c = a.copy()
d = NumpyDataFrame.concat([a, c])
assert d.shape == (20, )
def test_concat_raises(a):
c = a.copy()
c.col["C"] = np.arange(100, 110)
with pytest.raises(NumpyDataFrameException):
NumpyDataFrame.concat([a, c])
def test_concat_fills_missing(a):
c = a.copy()
c.col["C"] = np.arange(100, 110)
d = NumpyDataFrame.concat([a, c], fill_value=np.inf)
assert np.all(d.data["C"] == np.array([np.inf] * 10 +
list(range(100, 110))))