def test_cc_add():
c = ColumnContainer(["a", "b", "c"])
c2 = c.add("d")
assert c2.columns == ["a", "b", "c", "d"]
assert c2.mapping() == [("a", "a"), ("b", "b"), ("c", "c"), ("d", "d")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
c2 = c.add("d", "D")
assert c2.columns == ["a", "b", "c", "d"]
assert c2.mapping() == [("a", "a"), ("b", "b"), ("c", "c"), ("d", "D")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
c2 = c.add("d", "a")
assert c2.columns == ["a", "b", "c", "d"]
assert c2.mapping() == [("a", "a"), ("b", "b"), ("c", "c"), ("d", "a")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
c2 = c.add("a", "b")
assert c2.columns == ["a", "b", "c"]
assert c2.mapping() == [("a", "b"), ("b", "b"), ("c", "c")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
def test_cc_init():
c = ColumnContainer(["a", "b", "c"])
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
c = ColumnContainer(["a", "b", "c"], {"a": "1", "b": "2", "c": "3"})
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "1"), ("b", "2"), ("c", "3")]
def test_cc_rename():
c = ColumnContainer(["a", "b", "c"])
c2 = c.rename({"a": "A", "b": "a"})
assert c2.columns == ["A", "a", "c"]
assert c2.mapping() == [("a", "b"), ("b", "b"), ("c", "c"), ("A", "a")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
def test_cc_limit_to():
c = ColumnContainer(["a", "b", "c"])
c2 = c.limit_to(["c", "a"])
assert c2.columns == ["c", "a"]
assert c2.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]
assert c.columns == ["a", "b", "c"]
assert c.mapping() == [("a", "a"), ("b", "b"), ("c", "c")]