def test_replace():
df = DataFrame({"a": [2, 1, 3], "b": [1, 2, 3]})
s = Series("c", [True, False, True])
df.replace("a", s)
assert df.frame_equal(DataFrame({
"c": [True, False, True],
"b": [1, 2, 3]
}))
def test_slice():
df = DataFrame({"a": [2, 1, 3], "b": ["a", "b", "c"]})
df = df.slice(1, 2)
assert df.frame_equal(DataFrame({"a": [1, 3], "b": ["b", "c"]}))
def test_sort():
df = DataFrame({"a": [2, 1, 3], "b": [1, 2, 3]})
df.sort("a", in_place=True)
assert df.frame_equal(DataFrame({"a": [1, 2, 3], "b": [2, 1, 3]}))