如何为 aws lambda 处理程序 function (Python) 编写单元测试

Question

Everyone

I have a function which is the handler for aws lambdafunction.

def data_list(event, data_subject):
    dynamodb = boto3.resource("dynamodb")
    table = dynamodb.Table("TestTable")
    print("DATA_LIST")

    def get_col_name(data_subject):
        if data_subject == "X":
            return 'something'
        elif data_subject == "y":
            return 'some other things'
        elif data_subject == "c":
            return 'really'

    def another_function(var):
        pass

I have multiple function under data_list function how can we write unittest cases for each individual function which is under data_list function

Answer 1

Don't.

Instead move them out from the lambda handler function so that you can test them entirely separately.

Then make the lambda handler function it's self so small and simple that you barely need to test it, and can handle testing it with system tests.