def freeze(h, output_yaml, resolve, groups):
    """Output installed packages."""
    if not groups:
        groups = filter(lambda group: not group.lower().startswith("bower"),
                        h.requirements.keys())
    else:
        groups = [text_type.strip(group) for group in groups.split(",")]

    if output_yaml:
        for requirements in h.requirements.values():
            for requirement in requirements:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
        click.echo(h.requirements.yaml)
    else:
        for group in groups:
            if not h.requirements[group]:
                continue
            click.echo("# {}".format(group))
            for requirement in h.requirements[group]:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
                click.echo(str(requirement))
def test_user_login(self):
        c = Client()
        # User points the browser to the landing page
        res = c.post('/', follow=True)

        # the user is not logged in
        self.assertFalse(res.context['user'].is_authenticated)
        # and is redirected to the login page
        self.assertRedirects(res, '/login/')

        # The login page is being rendered by the correct template
        self.assertTemplateUsed(res, 'registration/login.html')

        # asks the user to login using a set of valid credentials
        res = c.post('/login/', data=self.credentials, follow=True)

        # The system acknowledges him
        self.assertTrue(res.context['user'].is_authenticated)

        # and moves him at the dashboard
        self.assertTemplateUsed(res, 'app/dashboard.html')