def test_has_no_top():
stack = Metastack()
assert stack.has('something') == False
def test_has_with_base():
stack = Metastack({'something': {'a_list': [1, 2], 'a_value': 5}})
assert stack.has('something/a_list') == True
assert stack.has('something/a_value') == True
assert stack.has('something/does_not_exist') == False
def test_has_top():
stack = Metastack()
stack._set_layer('identifier', {'something': 123})
assert stack.has('something') == True
def test_has_subpath():
stack = Metastack()
stack._set_layer('identifier', {'something': {'in': {'a': 'subpath'}}})
assert stack.has('something/in/a') == True
def test_has_no_subpath():
stack = Metastack()
stack._set_layer('identifier', {'something': {'in': {}}})
assert stack.has('something/in/a/path') == False
