def test_model_plugin():
div_elem = MockElement('div', id='test')
text_elem = MockElement('#text', id='text')
text_elem.text = "{{ c['name'] }}"
div_elem <= text_elem
input_elem = MockElement('input', model='c["name"]', id='input')
div_elem <= input_elem
document <= div_elem
tpl = Template(document['test'])
ctx = Context({})
ctx.c = {'name': ''}
elem = tpl.bind_ctx(ctx)
text_elem = document['text']
input_elem = document['input']
assert text_elem.text == ''
input_elem.setAttribute('value', 'Jonathan')
assert text_elem.text == 'Jonathan'
assert ctx.c['name'] == 'Jonathan'
assert input_elem.value == 'Jonathan'
input_elem.value = 'Test'
assert text_elem.text == 'Jonathan'
assert ctx.c['name'] == 'Jonathan'
ctx.c['name'] = 'Test2'
assert input_elem.value == 'Test2'
assert text_elem.text == 'Test2'
def test_extension():
base = Context()
base.a = 10
base.c = 30
child = Context(base=base)
# Child should have access to parent
assert child.a == 10
# The _get method should work for accessing parent
assert child._get('a') == 10
# Child should not be allowed to modify parent
child.a = 20
assert child.a == 20
assert base.a == 10
# Attributes should propagate recursively
second_child = Context(base=child)
assert second_child.c == 30
assert second_child.a == 20