如何正確斷言在 pytest 中引發異常？ - How to properly assert that an exception gets raised in pytest?

問題：

Code:代碼：

# coding=utf-8
import pytest


def whatever():
    return 9/0

def test_whatever():
    try:
        whatever()
    except ZeroDivisionError as exc:
        pytest.fail(exc, pytrace=True)

Output:輸出：

================================ test session starts =================================
platform linux2 -- Python 2.7.3 -- py-1.4.20 -- pytest-2.5.2
plugins: django, cov
collected 1 items 

pytest_test.py F

====================================== FAILURES ======================================
___________________________________ test_whatever ____________________________________

    def test_whatever():
        try:
            whatever()
        except ZeroDivisionError as exc:
>           pytest.fail(exc, pytrace=True)
E           Failed: integer division or modulo by zero

pytest_test.py:12: Failed
============================== 1 failed in 1.16 seconds ==============================

How to make pytest print traceback, so I would see where in the whatever function an exception was raised?如何使 pytest 打印回溯，所以我會看到在whatever函數中引發異常的位置？

---

解決方案：

參考一： https://stackoom.com/question/1Zv8p
參考二： How to properly assert that an exception gets raised in pytest?