def test_peek_with_one(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertEqualTwice([it.sentinel], it.peek, 1)
self.assertFalseTwice(it.has_next)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1'], it.peek, 1)
assert '1' == next(it)
self.assertFalseTwice(it.has_next)
self.assertEqualTwice([it.sentinel], it.peek, 1)
self.assertFalseTwice(it.has_next)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1'], it.peek, 1)
assert '1' == next(it)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['2'], it.peek, 1)
assert '2' == next(it)
self.assertFalseTwice(it.has_next)
self.assertEqualTwice([it.sentinel], it.peek, 1)
self.assertFalseTwice(it.has_next)
def test_next_with_multi(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 2)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 2)
self.assertTrueTwice(it.has_next)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
assert ['1', '2'] == it.next(2)
self.assertFalseTwice(it.has_next)
a = ['1', '2', '3']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
assert ['1', '2'] == it.next(2)
self.assertTrueTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 2)
self.assertTrueTwice(it.has_next)
a = ['1', '2', '3', '4']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
assert ['1', '2'] == it.next(2)
self.assertTrueTwice(it.has_next)
assert ['3', '4'] == it.next(2)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 2)
self.assertFalseTwice(it.has_next)
def test_next_with_none(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next)
self.assertFalseTwice(it.has_next)
a = ['1']
it = iterpeek(a)
assert '1' == it.__next__()
a = ['1']
it = iterpeek(a)
self.assertNext(it, '1', is_last=True)
a = ['1', '2']
it = iterpeek(a)
self.assertNext(it, '1', is_last=False)
self.assertNext(it, '2', is_last=True)
a = ['1', '2', '3']
it = iterpeek(a)
self.assertNext(it, '1', is_last=False)
self.assertNext(it, '2', is_last=False)
self.assertNext(it, '3', is_last=True)
def test_peek_with_zero(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertEqualTwice([], it.peek, 0)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.peek, 0)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.peek, 0)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.peek, 0)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.peek, 0)
def test_next_with_zero(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 0)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.next, 0)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.next, 0)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.next, 0)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice([], it.next, 0)
def test_peek_with_multi(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertEqualTwice([it.sentinel, it.sentinel], it.peek, 2)
self.assertFalseTwice(it.has_next)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', it.sentinel], it.peek, 2)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', it.sentinel, it.sentinel], it.peek, 3)
self.assertTrueTwice(it.has_next)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2'], it.peek, 2)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2', it.sentinel], it.peek, 3)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2', it.sentinel, it.sentinel], it.peek, 4)
self.assertTrueTwice(it.has_next)
a = ['1', '2', '3']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2'], it.peek, 2)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2', '3'], it.peek, 3)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['1', '2', '3', it.sentinel], it.peek, 4)
self.assertTrueTwice(it.has_next)
assert '1' == next(it)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['2', '3'], it.peek, 2)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['2', '3', it.sentinel], it.peek, 3)
self.assertTrueTwice(it.has_next)
self.assertEqualTwice(['2', '3', it.sentinel, it.sentinel], it.peek, 4)
self.assertTrueTwice(it.has_next)
def test_iter(self):
a = ['1', '2', '3']
it = iterpeek(a)
assert it is it.__iter__()
a = []
b = [i for i in iterpeek(a)]
assert [] == b
a = ['1']
b = [i for i in iterpeek(a)]
assert ['1'] == b
a = ['1', '2']
b = [i for i in iterpeek(a)]
assert ['1', '2'] == b
a = ['1', '2', '3']
b = [i for i in iterpeek(a)]
assert ['1', '2', '3'] == b
def test_init_with_sentinel(self):
a = iter(['1', '2', 'DONE'])
sentinel = 'DONE'
pytest.raises(TypeError, iterpeek, a, sentinel)
def get_next():
return next(a)
it = iterpeek(get_next, sentinel)
assert it.sentinel == sentinel
self.assertNext(it, '1', is_last=False)
self.assertNext(it, '2', is_last=True)
def test_next_with_one(self):
a = []
it = iterpeek(a)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 1)
a = ['1']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
assert ['1'] == it.next(1)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 1)
a = ['1', '2']
it = iterpeek(a)
self.assertTrueTwice(it.has_next)
assert ['1'] == it.next(1)
self.assertTrueTwice(it.has_next)
assert ['2'] == it.next(1)
self.assertFalseTwice(it.has_next)
self.assertRaisesTwice(StopIteration, it.next, 1)