def send_message(self, message):
        data = {'text': str(message)}
        self.__prep_and_send_data(data)
Test an error with assertIsInstance.
dataset/ETHPy150Open univ-of-utah-marriott-library-apple/management_tools/management_tools/slack.py/IncomingWebhooksSender.send_message--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/trial/test/test_assertions.py/TestSynchronousAssertions.test_assertIsInstanceError