def load(self, requirements_file=None):
        """Load or reload requirements from a requirements.txt file.

        :param requirements_file: if not given, the filename used from
            initialization will be read again.
        """
        if requirements_file is None:
            requirements_file = self.filename
            if requirements_file is None:
                raise ValueError("no filename provided")
        elif isinstance(requirements_file, text_type):
            requirements_file = Path(requirements_file)
        self.clear()
        with requirements_file.open() as f:
            self.loads(f.read())

        if isinstance(requirements_file, (text_type, Path)):
            self.filename = requirements_file
def test_projects(self):
        # Get a normal user
        user = User.objects.get(username="testuser")
        self.assertFalse(user.is_superuser)

        # Create a new project
        p = Project.objects.create(owner=user, name="test")

        # Have the proper permissions been set?
        self.assertTrue(user.has_perm("view_project", p))
        self.assertTrue(user.has_perm("add_project", p))
        self.assertTrue(user.has_perm("change_project", p))
        self.assertTrue(user.has_perm("delete_project", p))

        # Get a superuser
        superUser = User.objects.get(username="testsuperuser")
        self.assertTrue(superUser.is_superuser)

        # He should also have permissions, although not explicitly set
        self.assertTrue(superUser.has_perm("delete_project", p))

        # Get another user
        anotherUser = User.objects.get(username="testuser2")
        self.assertFalse(anotherUser.is_superuser)

        # Should not have permission
        self.assertFalse(anotherUser.has_perm("delete_project", p))