def test_push_unknown():
ctx = Context()
needle = 'xyzzy'
assert needle not in _default_context.keys()
with pytest.raises(KeyError):
ctx.push(**{needle: Nothing})
with pytest.raises(RuntimeError):
ctx.pop()
def test_push_known():
ctx = Context()
needle = _default_context.keys()[0]
assert needle in ctx
assert ctx[needle] is not Nothing
ctx.push(**{needle.encode('ascii'): Nothing})
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
def test_push_known():
ctx = Context()
needle = _default_context.keys()[0]
assert needle in ctx
assert ctx[needle] is not Nothing
ctx.push(**{needle.encode('ascii'): Nothing})
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
def test_push_known():
ctx = Context()
needle = list(_default_context.keys())[0]
assert needle in ctx
assert ctx[needle] is not Nothing
ctx.push(**{needle: Nothing})
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
def test_push_known():
ctx = Context()
needle = list(_default_context.keys())[0]
assert needle in ctx
assert ctx[needle] is not Nothing
ctx.push(**{needle: Nothing})
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
def test_stack_plain_push_pop():
ctx = Context()
needle, initial_value = _default_context.items()[0]
assert ctx[needle] == initial_value
ctx.push()
assert ctx[needle] == initial_value
ctx[needle] = Nothing
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
assert ctx[needle] == initial_value
assert_raises(RuntimeError, ctx.pop)
def test_stack_plain_push_pop():
ctx = Context()
needle, initial_value = _default_context.items()[0]
assert ctx[needle] == initial_value
ctx.push()
assert ctx[needle] == initial_value
ctx[needle] = Nothing
assert ctx[needle] is Nothing
ctx.pop()
assert ctx[needle] is not Nothing
assert ctx[needle] == initial_value
assert_raises(RuntimeError, ctx.pop)
def test_default_minimum_stack():
ctx = Context()
with pytest.raises(RuntimeError):
ctx.pop()
