def test_admin_index_when_one_admin(admins):
admins.return_value = [Mock(username="******")]
assert AdminController.index()["admin_users"] == ["fred"]
def test_admin_index_when_multiple_admins(admins_function):
admins_function.return_value = [Mock(username="******"), Mock(username="******"), Mock(username="******")]
template_data = AdminController.index()
assert template_data["admin_users"] == ["fred", "bob", "frank"]
def test_admin_index_when_no_admins(admins):
admins.return_value = []
assert AdminController.index()["admin_users"] == []