如何在字典列表的 Json 响应中断言值答案

【问题标题】：How to assert values in a Json response of List of dictionaries如何在字典列表的 Json 响应中断言值
【发布时间】：2020-02-04 23:17:03
【问题描述】：

这是我从 GET 请求中得到的 Json 响应。


[
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 124,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-01-31T11:14:11.571934+00:00",
        "state": "failed"
    },
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 215,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-01-31T11:14:11.571934+00:00",
        "state": "success"
    },
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 746,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-02-04T11:46:32.465726+00:00",
        "state": "pause"
    }

]

从响应中，我如何断言每个字典列表都有 run_date、id、job_id 和 state。
如果得到 id == 215 并且状态为成功，我可以断言吗？

提前致谢

【问题讨论】：

你到底是什么意思，你怎么能断言它？通过检查条件是否为真，如果不是则引发AssertionError（或其他）异常。哪一部分你不知道该怎么做？

标签： python list assertion

【解决方案1】：

编辑：您可以使用像 Marshmallow 这样的模式库来断言每次运行是否属于某个模式

我会尝试这样的：

def assert_runs(runs, assertions, success_ids):
    for run in runs:
        for assertion in assertions:
            assert assertion in run
            if run['id'] in success_ids:
                try:
                    assert run['state'] == 'success'
                except AssertionError as e:
                    print('ERROR', run['id'], run['state'])
                    raise e

传递运行、断言和 ID 列表以断言成功但这太嵌套了，所以我会分成两个这样的函数：

def assert_ids(run, success_ids):
    if run['id'] in success_ids:
        try:
            assert run['state'] == 'success'
        except AssertionError as e:
            print('ERROR', run['id'], run['state'])
            raise e

def assert_runs(runs, assertions, success_ids):
    for run in runs:
        for assertion in assertions:
            assert assertion in run
            assert_ids(run, success_ids)

并将其称为：

assertions = ['run_date', 'id', 'job_id', 'state']
runs = [
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 124,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-01-31T11:14:11.571934+00:00",
        "state": "failed"
    },
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 215,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-01-31T11:14:11.571934+00:00",
        "state": "success"
    },
    {
        "run_date": "2020-01-31T11:14:11+00:00",
        "id": 746,
        "job_id": "2020-01-31T11:14:11+00:00",
        "start_date": "2020-02-04T11:46:32.465726+00:00",
        "state": "pause"
    }

]

assert_runs(runs, assertions, [215, 746])

【讨论】：