def test_copy(self):
ss = StackSet([1,3,5,7])
ss2 = ss.copy()
assert len(ss2) == 4
ss.push(9)
assert len(ss) == 5
assert len(ss2) == 4
def test_push_one_thing_twice(self):
ss = StackSet()
ss.push('pokey')
ss.push('pokey')
assert len(ss) == 1
k = ss.pop()
assert k == 'pokey'
assert len(ss) == 0
def test_push_into_empty(self):
ss = StackSet()
ss.push('hi')
assert len(ss) == 1
assert ss.peek() == 'hi'
k = ss.pop()
assert len(ss) == 0
assert k == 'hi'
def test_push_multiple_replace_one(self):
ss = StackSet()
self.fill_stack(ss, 20)
assert len(ss) == 20
ss.push(15)
assert len(ss) == 20
k = ss.pop()
assert k == 15
assert len(ss) == 19
def test_push_two(self):
ss = StackSet()
ss.push('a')
ss.push('b')
assert len(ss) == 2
k = ss.pop()
assert k == 'b'
assert len(ss) == 1
k = ss.pop()
assert k == 'a'
assert len(ss) == 0
def test_clear(self):
ss = StackSet()
ss.push(3)
ss.push(5)
ss.clear()
assert len(ss) == 0
ss.push(1)
ss.push(9)
assert len(ss) == 2
ss.clear()
assert len(ss) == 0
assert not 3 in ss
assert not 5 in ss
assert not 1 in ss
assert not 9 in ss
def test_push_multiple_replace_multiple(self):
ss = StackSet()
self.fill_stack(ss, 100)
ss.push(5)
ss.push(50)
ss.push(55)
ss.push(105)
assert 5 in ss
assert 50 in ss
assert 55 in ss
assert 105 in ss
assert len(ss) == 101
assert ss.peek() == 105
