def test_unshift():
assert ImmutableList.of(1, 2).unshift(0) == ImmutableList.of(0, 1, 2)
def test_append():
assert ImmutableList.of(1, 2).append(3) == ImmutableList.of(1, 2, 3)
def test_find_positive():
assert ImmutableList.of(1, 2, 3, 4).find(lambda item: item % 2 == 0) == 2
def test_find_negative():
assert ImmutableList.of(1, 2, 3, 4).find(lambda item: item < 0) is None
def test_plus_operator_exception():
with pytest.raises(ValueError):
ImmutableList.of(0) + [1]
def test_eq():
assert len(ImmutableList()) == 0
assert len(ImmutableList(1)) == 1
assert len(ImmutableList(1).unshift(0)) == 2
def test_empty_filter():
assert ImmutableList.of(
1, 2, 3, 4).filter(lambda item: False) == ImmutableList.empty()
def test_plus_operator():
assert ImmutableList.of(1, 2) + ImmutableList.of(3, 4) == ImmutableList.of(
1, 2, 3, 4)
def test_filter():
assert ImmutableList.of(
1, 2, 3,
4).filter(lambda item: item % 2 == 0) == ImmutableList.of(2, 4)
def test_map():
assert ImmutableList.of(1, 2, 3,
4).map(lambda item: item + 1) == ImmutableList.of(
2, 3, 4, 5)
def test_of():
assert ImmutableList.of(1, 2, 3, 4).to_list() == [1, 2, 3, 4]
def test_to_list():
assert ImmutableList(1).unshift(0).to_list() == [0, 1]
def test_immutable():
lst = ImmutableList(1)
lst2 = lst.append(2)
assert lst is not lst2