python - 对使用 boto3 将文件上传到 S3 的函数进行单元测试

Question

我有这个功能，可以将存档文件上传到 S3 存储桶:

def upload_file_to_s3_bucket(self, bucket, file, key, log):
    if not os.path.exists(file):
        log.error("File '%s' does not exist." % file)
        tools.exit_gracefully(log)
    log.info("Uploading file '%s' to bucket '%s' ..." % (file, bucket))
    try:
        self._s3.upload_file(file, bucket, key)
    except botocore.exceptions.ClientError as e:
        log.error("Unexpected uploading error : %s" % e)
        tools.exit_gracefully(log)
    log.info("Uploading finished.")

我想为它做一个单元测试，这是我目前能写的:

class TestUploadFilesToS3(unittest.TestCase):
    """ Tests unitaires upload_file_to_s3_bucket"""


    def setUp(self):
        conf.LOG_FILE = "/tmp/test.log"
        conf.BUCKET_OUTPUT="name.of.the.bucket"
        conf.Conf.get_level_log()
        self.log = logger(conf.LOG_FILE, conf.LEVEL_LOG).logger
        tools.create_workdir(self.log)
        conf.WORKDIR = os.path.join(conf.LOCAL_DIR, "files/output")
        archive = "file_archive.tar.gz"
        archivePath = "/tmp/clients/file_archive.tar.gz"
        _aws = None

    def tearDown(self):
        tools.delete_workdir(self.log)
        os.remove(conf.LOG_FILE)


    def test_upload_file_to_s3_bucket_success(self):
        self._aws.upload_file_to_s3_bucket(conf.BUCKET_OUTPUT, archivePath, archive, self._log)

要进行单元测试，我不知道在测试函数test_upload_file_to_s3_bucket_success中应该使用哪个函数Assert，具体比较什么。例如，我可以测试文件的 URL 是否存在......？有任何想法吗？谢谢

Answer 1

您可以使用此库模拟与 S3 的交互:

https://github.com/spulec/moto