I want to test a controller that is supposed to create a record.

I have this unit test file:

class TestController(HttpCase):

    def test_create_record(self, target_url):
        response = self.url_open('/my/create_obj', data={'name': 'obay'}, timeout=100)
        # after this, the object is created in the database 
        # but it doesn't show in the next search results
        self.env['object.name'].search([])  # empty record set

Does the url_open roll back immediately after it finishes the request?