def test_no_resize():
"""
Проверка изменения размера при том же значении
"""
c = Carousel(window=2)
assert c.window == 2
c.resize(c.window)
assert c.window == 2
def test_repr_long():
"""
Проверка текстового представления
"""
c = Carousel(window=40)
assert repr(c) == 'Carousel([NULL, NULL, NULL, ..., NULL, NULL, NULL], len=0, window=40)'
c = Carousel(range(100), window=40)
assert repr(c) == 'Carousel([60, 61, 62, ..., 97, 98, 99], len=40, window=40)'
def test_len():
"""
Проверка измерения длины
"""
maxlen = 5
c = Carousel(window=maxlen)
for i in range(1, 10):
c.push(i)
assert len(c) == i if i < maxlen else maxlen
assert len(c) == maxlen
def test_str():
"""
Проверка текстового представления
"""
c = Carousel(window=4)
assert str(c) == 'Carousel([], window=4)'
c = Carousel([1, 2, 3])
assert str(c) == 'Carousel([1, 2, 3], window=3)'
c = Carousel([1, 2, 3], window=2)
assert str(c) == 'Carousel([2, 3], window=2)'
def test_is_sentinel():
"""
Проверка выдачи пустого элемента
"""
c = Carousel(window=2)
with pytest.raises(IndexError):
_ = c[0]
def test_setitem_slice():
"""
Проверка подмены элемента
"""
c = Carousel(window=4)
with pytest.raises(IndexError):
c[:] = [9, 8, 7, 6]
def test_getitem_slice():
"""
Проверка обращения к элементу (срез как индекс)
"""
c = Carousel(window=4)
assert c[:] == []
for i in range(1, 9):
c.push(i)
assert c[0] == 5
assert c[1] == 6
assert c[2] == 7
assert c[3] == 8
assert c[:] == [5, 6, 7, 8]
assert c[:4] == [5, 6, 7, 8]
assert c[:3] == [5, 6, 7]
assert c[:2] == [5, 6]
assert c[:1] == [5]
assert c[1:] == [6, 7, 8]
assert c[2:] == [7, 8]
assert c[3:] == [8]
assert c[4:] == []
c.push(9)
assert c[:] == [6, 7, 8, 9]
assert c[:4] == [6, 7, 8, 9]
assert c[:3] == [6, 7, 8]
assert c[:2] == [6, 7]
assert c[:1] == [6]
assert c[1:] == [7, 8, 9]
assert c[2:] == [8, 9]
assert c[3:] == [9]
assert c[4:] == []
c.push(10)
assert c[:] == [7, 8, 9, 10]
assert c[1:] == [8, 9, 10]
assert c[2:] == [9, 10]
assert c[3:] == [10]
assert c[4:] == []
assert c[0:3:2] == [7, 9]
def test_get_contents():
"""
Не должно влиять на внутренности
"""
c = Carousel([1, 2, 3])
assert c.get_contents() == [1, 2, 3]
assert c._data == [1, 2, 3]
assert c._data == c.get_contents()
c = Carousel([1, 2, 3], window=2)
assert c.get_contents() == [2, 3]
assert c._data == [3, 2]
assert c._data != c.get_contents()
def test_iter():
"""
Проверка итерирования по карусели
"""
base = [1, 2, 3]
c = Carousel(base, window=4)
for ref, value in zip(base, c):
assert ref == value
# убедимся, что не сломали список
assert base == [1, 2, 3]
def test_setitem_int():
"""
Проверка подмены элемента
"""
c = Carousel(window=3)
with pytest.raises(IndexError):
c[0] = 1
c.push(1)
c.push(2)
c.push(3)
c.push(4)
c.push(5)
c.push(6)
assert c[0] == 4
assert c[1] == 5
assert c[2] == 6
assert c[-1] == 6
assert c[-2] == 5
assert c[-3] == 4
assert c[:] == [4, 5, 6]
c[0] = 9
assert c[0] == 9
assert c[1] == 5
assert c[2] == 6
c[1] = 7
assert c[0] == 9
assert c[1] == 7
assert c[2] == 6
c[2] = 4
assert c[0] == 9
assert c[1] == 7
assert c[2] == 4
c[-1] = 78
assert c[0] == 9
assert c[1] == 7
assert c[2] == 78
with pytest.raises(IndexError):
c[75] = 6
def test_resize_empty():
"""
Проверка изменения размера пустой карусели
"""
c = Carousel(window=2)
assert c.window == 2
assert repr(c) == 'Carousel([NULL, NULL], window=2)'
c.resize(5)
assert c.window == 5
assert repr(c) == 'Carousel([NULL, NULL, NULL, NULL, NULL], window=5)'
c.resize(3)
assert c.window == 3
assert repr(c) == 'Carousel([NULL, NULL, NULL], window=3)'
def test_push():
"""
Проверка добавления элемента
"""
maxlen = 3
c = Carousel(window=maxlen, sentinel=None)
assert c.get_contents() == []
x = c.push(1)
assert c.get_contents() == [1]
assert x is None
x = c.push(2)
assert c.get_contents() == [1, 2]
assert x is None
x = c.push(3)
assert c.get_contents() == [1, 2, 3]
assert x is None
x = c.push(4)
assert c.get_contents() == [2, 3, 4]
assert x == 1
x = c.push(5)
assert c.get_contents() == [3, 4, 5]
assert x == 2
x = c.push(6)
assert c.get_contents() == [4, 5, 6]
assert x == 3
def test_getitem_int():
"""
Проверка обращения к элементу (целое как индекс)
"""
c = Carousel(window=4)
with pytest.raises(IndexError):
assert c[0]
with pytest.raises(IndexError):
# noinspection PyTypeChecker
assert c['test']
c.push(1)
assert c[0] == 1
assert c[-1] == 1
with pytest.raises(IndexError):
assert c[2]
c.push(2)
assert c[0] == 1
assert c[1] == 2
assert c[-1] == 2
assert c[-2] == 1
c.push(3)
assert c[0] == 1
assert c[1] == 2
assert c[2] == 3
assert c[-1] == 3
assert c[-2] == 2
assert c[-3] == 1
c.push(4)
assert c[0] == 1
assert c[1] == 2
assert c[2] == 3
assert c[3] == 4
assert c[-1] == 4
assert c[-2] == 3
assert c[-3] == 2
assert c[-4] == 1
c.push(5)
assert c[0] == 2
assert c[1] == 3
assert c[2] == 4
assert c[3] == 5
assert c[-1] == 5
assert c[-2] == 4
assert c[-3] == 3
assert c[-4] == 2
c.push(6)
assert c[0] == 3
assert c[1] == 4
assert c[2] == 5
assert c[3] == 6
assert c[-1] == 6
assert c[-2] == 5
assert c[-3] == 4
assert c[-4] == 3
c.push(7)
assert c[0] == 4
assert c[1] == 5
assert c[2] == 6
assert c[3] == 7
assert c[-1] == 7
assert c[-2] == 6
assert c[-3] == 5
assert c[-4] == 4
c.push(8)
assert c[0] == 5
assert c[1] == 6
assert c[2] == 7
assert c[3] == 8
assert c[-1] == 8
assert c[-2] == 7
assert c[-3] == 6
assert c[-4] == 5
def test_resize():
"""
Проверка изменения размера
"""
c = Carousel([1, 2, 3], window=2)
assert len(c) == 2
assert c.window == 2
assert c.get_contents() == [2, 3]
assert repr(c) == 'Carousel([2, 3], window=2)'
c.resize(5)
assert repr(c) == 'Carousel([2, 3, NULL, NULL, NULL], window=5)'
c.push(4)
c.push(5)
assert len(c) == 4
assert c.window == 5
assert c.get_contents() == [2, 3, 4, 5]
assert repr(c) == 'Carousel([2, 3, 4, 5, NULL], window=5)'
c.push(6)
assert len(c) == 5
assert c.window == 5
assert c.get_contents() == [2, 3, 4, 5, 6]
assert repr(c) == 'Carousel([2, 3, 4, 5, 6], window=5)'
c.resize(2)
assert repr(c) == 'Carousel([5, 6], window=2)'
assert len(c) == 2
assert c.window == 2
assert c.get_contents() == [5, 6]
def test_creation():
"""
Проверка создания
"""
with pytest.raises(ValueError):
Carousel()
c = Carousel(window=2)
assert len(c) == 0
assert c.window == 2
assert c.get_contents() == []
c = Carousel([1, 2, 3])
assert len(c) == 3
assert c.window == 3
assert c.get_contents() == [1, 2, 3]
assert c.extract() == [1, 2, 3]
c = Carousel([1, 2, 3], window=2)
assert len(c) == 2
assert c.window == 2
assert c.get_contents() == [2, 3]
assert c.extract() == [2, 3]