def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def test_list_task_watchers(client):
    user = f.UserFactory.create()
    task = f.TaskFactory(owner=user)
    f.MembershipFactory.create(project=task.project, user=user, is_admin=True)
    f.WatchedFactory.create(content_object=task, user=user)
    url = reverse("task-watchers-list", args=(task.id,))

    client.login(user)
    response = client.get(url)

    assert response.status_code == 200
    assert response.data[0]['id'] == user.id