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Fixtures for testing Google Appengine (GAE) apps

Project description

Convenience plugin on top of the testbed the Google Appengine (GAE) SDK already provides.

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Install

pip install pytest-beds

After that the plugin is enabled by default. You can use specific fixtures (see below) to activate the Testbed and stub specific services.

Options

--no-gae
Disable the plugin, esp. do not change the python paths and try to import dev_appserver.
--sdk-path PATH
The plugin assumes it can just import dev_apserver. If that fails it looks up the SDK path in the environment variable GAE. Otherwise, you can specify the path to the SDK by using the --sdk-path PATH option.
--project-root PATH
Secondly, the plugin assume that your current path is the projects root folder, t.i. the dirctory which holds the app.yaml. You can specify a different path using --project-root PATH.
--noisy-tasklets
By default the plugin shortens the tracebacks when using ndb tasklets, so they don’t include the eventloop’s internal noise. Use this switch to make ndb noisy again.

Fixtures

The plugin provides fixtures to stub the different services. Usage is therefore simple and straightforward:

# Say, if you create a Foo you hit the database and put some work on queue
def test_foo(ndb, taskqueue):
    foo = Foo.create()

    assert Foo.query().fetch() == [foo]

List of builtin fixtures:

bed
mailer
channel
urlfetch
memcache
taskqueue
blobstore
ndb
users

Users

There are two fixtures anonymous and login to handle the users-stub.

anonymous
Prepares the user stub so that users.get_current_user() will return None
login

Prepares the user stub and returns a function to login actual users:

def test_login(login):
    # at this point users.get_current_user() will return None

    login(id=1, email='foo@gmail.com')
    # now users.get_current_user() will return a user

    login.logout()
    # now users.get_current_user() will return None again

Deferreds

The deferreds fixture inits the taskqueue stub, but returns a useful object, so you can actually run the deferred functions:

def test_work(deferreds):
    deferred.defer(work, 'to be done')

    deferreds.consume()

    assert 'work has been done'

Project details


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