예제 #1
0
    def test_equals_categorical(self):
        ci1 = CategoricalIndex(["a", "b"], categories=["a", "b"], ordered=True)
        ci2 = CategoricalIndex(["a", "b"],
                               categories=["a", "b", "c"],
                               ordered=True)

        assert ci1.equals(ci1)
        assert not ci1.equals(ci2)
        assert ci1.equals(ci1.astype(object))
        assert ci1.astype(object).equals(ci1)

        assert (ci1 == ci1).all()
        assert not (ci1 != ci1).all()
        assert not (ci1 > ci1).all()
        assert not (ci1 < ci1).all()
        assert (ci1 <= ci1).all()
        assert (ci1 >= ci1).all()

        assert not (ci1 == 1).all()
        assert (ci1 == Index(["a", "b"])).all()
        assert (ci1 == ci1.values).all()

        # invalid comparisons
        with pytest.raises(ValueError, match="Lengths must match"):
            ci1 == Index(["a", "b", "c"])

        msg = "Categoricals can only be compared if 'categories' are the same"
        with pytest.raises(TypeError, match=msg):
            ci1 == ci2
        with pytest.raises(TypeError, match=msg):
            ci1 == Categorical(ci1.values, ordered=False)
        with pytest.raises(TypeError, match=msg):
            ci1 == Categorical(ci1.values, categories=list("abc"))

        # tests
        # make sure that we are testing for category inclusion properly
        ci = CategoricalIndex(list("aabca"), categories=["c", "a", "b"])
        assert not ci.equals(list("aabca"))
        # Same categories, but different order
        # Unordered
        assert ci.equals(CategoricalIndex(list("aabca")))
        # Ordered
        assert not ci.equals(CategoricalIndex(list("aabca"), ordered=True))
        assert ci.equals(ci.copy())

        ci = CategoricalIndex(list("aabca") + [np.nan],
                              categories=["c", "a", "b"])
        assert not ci.equals(list("aabca"))
        assert not ci.equals(CategoricalIndex(list("aabca")))
        assert ci.equals(ci.copy())

        ci = CategoricalIndex(list("aabca") + [np.nan],
                              categories=["c", "a", "b"])
        assert not ci.equals(list("aabca") + [np.nan])
        assert ci.equals(CategoricalIndex(list("aabca") + [np.nan]))
        assert not ci.equals(
            CategoricalIndex(list("aabca") + [np.nan], ordered=True))
        assert ci.equals(ci.copy())