代码:

# coding=utf-8
import pytest


def whatever():
    return 9/0

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

输出:

================================ 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 ==============================

如何使pytest打印回溯,所以我将看到在任何函数异常被引发的地方?


当前回答

我只是写了一个钩子,每个测试都会得到

诱惑:

@pytest。hookimpl (tryfirst = True, hookwrapper = True) def pytest_runtest_makereport(item: item, call: CallInfo):

    outcome = yield  # The result after the test is completed
    result = outcome.get_result()

    if result.when == "call":
       if result.failed == True:

       else:

我有一个函数,更新一个文档与测试结果,并通过使用:result.longrepr.reprcrash.message添加跟踪

我不知道这是否是最好的方法,但它确实回答了如何仅使用pytest打印回溯的问题

@显然我有一些其他的代码

其他回答

你的意思是这样的吗?

def test_raises():
    with pytest.raises(Exception) as exc_info:   
        raise Exception('some info')
    # these asserts are identical; you can use either one   
    assert exc_info.value.args[0] == 'some info'
    assert str(exc_info.value) == 'some info'

我只是写了一个钩子,每个测试都会得到

诱惑:

@pytest。hookimpl (tryfirst = True, hookwrapper = True) def pytest_runtest_makereport(item: item, call: CallInfo):

    outcome = yield  # The result after the test is completed
    result = outcome.get_result()

    if result.when == "call":
       if result.failed == True:

       else:

我有一个函数,更新一个文档与测试结果,并通过使用:result.longrepr.reprcrash.message添加跟踪

我不知道这是否是最好的方法,但它确实回答了如何仅使用pytest打印回溯的问题

@显然我有一些其他的代码

pytest.raise (Exception)是你所需要的。

Code

import pytest

def test_passes():
    with pytest.raises(Exception) as e_info:
        x = 1 / 0

def test_passes_without_info():
    with pytest.raises(Exception):
        x = 1 / 0

def test_fails():
    with pytest.raises(Exception) as e_info:
        x = 1 / 1

def test_fails_without_info():
    with pytest.raises(Exception):
        x = 1 / 1

# Don't do this. Assertions are caught as exceptions.
def test_passes_but_should_not():
    try:
        x = 1 / 1
        assert False
    except Exception:
        assert True

# Even if the appropriate exception is caught, it is bad style,
# because the test result is less informative
# than it would be with pytest.raises(e)
# (it just says pass or fail.)

def test_passes_but_bad_style():
    try:
        x = 1 / 0
        assert False
    except ZeroDivisionError:
        assert True

def test_fails_but_bad_style():
    try:
        x = 1 / 1
        assert False
    except ZeroDivisionError:
        assert True

输出

============================================================================================= test session starts ==============================================================================================
platform linux2 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.6.4
collected 7 items 

test.py ..FF..F

=================================================================================================== FAILURES ===================================================================================================
__________________________________________________________________________________________________ test_fails __________________________________________________________________________________________________

    def test_fails():
        with pytest.raises(Exception) as e_info:
>           x = 1 / 1
E           Failed: DID NOT RAISE

test.py:13: Failed
___________________________________________________________________________________________ test_fails_without_info ____________________________________________________________________________________________

    def test_fails_without_info():
        with pytest.raises(Exception):
>           x = 1 / 1
E           Failed: DID NOT RAISE

test.py:17: Failed
___________________________________________________________________________________________ test_fails_but_bad_style ___________________________________________________________________________________________

    def test_fails_but_bad_style():
        try:
            x = 1 / 1
>           assert False
E           assert False

test.py:43: AssertionError
====================================================================================== 3 failed, 4 passed in 0.02 seconds ======================================================================================

请注意,e_info保存了异常对象,因此您可以从中提取详细信息。例如,如果您想检查异常调用堆栈或内部的另一个嵌套异常。

Pytest在不断地发展,最近有了一个很好的变化,现在可以同时进行测试了

异常类型(严格测试) 错误消息(使用正则表达式进行严格或松散检查)

文档中的两个例子:

with pytest.raises(ValueError, match='must be 0 or None'):
    raise ValueError('value must be 0 or None')
with pytest.raises(ValueError, match=r'must be \d+$'):
    raise ValueError('value must be 42')

我已经在许多项目中使用了这种方法,并且非常喜欢它。

注意: ilya-rusin的这一评论也暗示了上述方法。

这个解决方案是我们正在使用的:

def test_date_invalidformat():
    """
    Test if input incorrect data will raises ValueError exception
    """
    date = "06/21/2018 00:00:00"
    with pytest.raises(ValueError):
        app.func(date) #my function to be tested

请参考pytest, https://docs.pytest.org/en/latest/reference.html#pytest-raises