def test_contains():
stack = CallStack.current()
frame = CallFrame.current()
assert frame in stack
def test_context():
with CallStack.current() as stack:
assert len(stack) > 0
assert len(stack) == 0
def test_get():
stack = CallStack.current()
frame = CallFrame.current()
assert stack[-1] == frame
def test_slicing():
stack = CallStack.current()
_ = stack[:5]
def test_indexing():
stack = CallStack.current()
frame = CallFrame.current()
assert frame == stack[-1]
def test_len():
stack = CallStack.current()
assert len(stack) > 0
def test_reverse_iteration():
stack = CallStack.current()
list(reversed(stack))
def test_iteration():
stack = CallStack.current()
list(stack)
def test_from_frame():
frame = CallFrame.current()
stack = CallStack.from_frame(frame)
assert stack[-1] == frame