def test_stack_context(name):
stack = ContextStack(name)
stack.push(a=1)
assert list(stack.items()) == [('a', 1)]
with stack(b=2):
assert list(stack.items()) == [('b', 2), ('a', 1)]
assert list(stack.items()) == [('a', 1)]
def test_stack_context_manager():
stack = ContextStack()
stack.push(a=1)
assert list(stack.items()) == [('a', 1)]
with stack(b=2):
assert list(stack.items()) == [('b', 2), ('a', 1)]
assert list(stack.items()) == [('a', 1)]
def test_stack_clear(name):
stack = ContextStack(name)
stack.push(a=1)
stack.push(b=2)
stack.push(c=3)
assert list(stack.items()) == [('c', 3), ('b', 2), ('a', 1)]
stack.clear()
assert list(stack.items()) == []
def test_stack_clear(name):
stack = ContextStack(name)
stack.push(a=1)
stack.push(b=2)
stack.push(c=3)
assert list(stack.items()) == [('c', 3), ('b', 2), ('a', 1)]
stack.clear()
assert list(stack.items()) == []
def test_stack_dict_arg():
stack = ContextStack()
with stack({'a': 1}):
assert list(stack.items()) == [('a', 1)]
with stack({'a': 1}, b=2):
# order not preserved, as kwargs
assert dict(stack) == {'a': 1, 'b': 2}
def test_stack_dict_arg(name):
stack = ContextStack(name)
with stack({'a': 1}):
assert list(stack.items()) == [('a', 1)]
with stack({'a': 1}, b=2):
# order not preserved, as kwargs
assert dict(stack) == {'a': 1, 'b': 2}
def test_stack_basic():
stack = ContextStack()
stack.push(a=1)
assert stack['a'] == 1
assert list(stack.items()) == [('a', 1)]
stack.push(b=2)
assert stack['b'] == 2
assert list(stack.items()) == [('b', 2), ('a', 1)]
stack.push(a=3)
assert stack['a'] == 3
assert list(stack.items()) == [('a', 3), ('b', 2)]
stack.pop()
assert stack['a'] == 1
assert list(stack.items()) == [('b', 2), ('a', 1)]
stack.pop()
assert stack['a'] == 1
assert list(stack.items()) == [('a', 1)]
stack.pop()
with pytest.raises(KeyError):
stack['a']
assert list(stack.items()) == []
def test_stack_basic(name):
stack = ContextStack(name)
stack.push(a=1)
assert stack['a'] == 1
assert list(stack.items()) == [('a', 1)]
stack.push(b=2)
assert stack['b'] == 2
assert list(stack.items()) == [('b', 2), ('a', 1)]
stack.push(a=3)
assert stack['a'] == 3
assert list(stack.items()) == [('a', 3), ('b', 2)]
stack.pop()
assert stack['a'] == 1
assert list(stack.items()) == [('b', 2), ('a', 1)]
stack.pop()
assert stack['a'] == 1
assert list(stack.items()) == [('a', 1)]
stack.pop()
with pytest.raises(KeyError):
stack['a']
assert list(stack.items()) == []
