def test_slot_defaults(web_fixture):
"""If a View does not specify contents for a Slot, the Slot will be populated by the window's default
widget for that slot if specified, else it will be left empty.
"""
class MainUI(UserInterface):
def assemble(self):
main = self.define_page(HTML5Page).use_layout(BasicPageLayout())
main.add_default_slot('main',
P.factory(text='defaulted slot contents'))
self.define_view('/', title='Hello')
fixture = web_fixture
wsgi_app = fixture.new_wsgi_app(site_root=MainUI)
browser = Browser(wsgi_app)
browser.open('/')
# The default widget for the main slot is used
[p] = browser.xpath('//p')
assert p.text == 'defaulted slot contents'
# The header slot has no default, and is thus left empty
header_contents = browser.xpath('//header/*')
assert not header_contents
def test_slots(web_fixture, slot_scenarios):
"""A View modifies the page by populating named Slots in the page with Widgets."""
fixture = slot_scenarios
wsgi_app = web_fixture.new_wsgi_app(site_root=fixture.MainUI)
browser = Browser(wsgi_app)
browser.open('/')
assert browser.title == 'Hello'
[main_p, footer_p] = browser.xpath('//p')
assert main_p.text == 'Hello world'
assert footer_p.text == 'I am the footer'
def test_basic_assembly(web_fixture, basic_scenarios):
"""An application is built by extending UserInterface, and defining this UserInterface in an .assemble() method.
To define the UserInterface, several Views are defined. Views are mapped to URLs. When a user GETs
the URL of a View, a page is rendered back to the user. How that page is created
can happen in different ways, as illustrated by each scenario of this test.
"""
fixture = basic_scenarios
wsgi_app = web_fixture.new_wsgi_app(site_root=fixture.MainUI)
browser = Browser(wsgi_app)
# GETting the URL results in the HTML for that View
with warnings.catch_warnings(record=True) as caught_warnings:
warnings.simplefilter('always')
browser.open('/')
assert browser.title == 'Hello'
warning_messages = [str(i.message) for i in caught_warnings]
assert len(warning_messages) == len(fixture.expected_warnings)
for caught, expected_message in itertools.zip_longest(
warning_messages, fixture.expected_warnings):
assert expected_message in caught
if fixture.content_includes_p:
[message] = browser.xpath('//p')
assert message.text == 'Hello world!'
# The headers are set correctly
response = browser.last_response
assert response.content_length == len(fixture.expected_content)
assert response.content_type == 'text/html'
assert response.charset == 'utf-8'
# Invalid URLs do not exist
with warnings.catch_warnings(record=True):
browser.open('/nonexistantview/', status=404)