pytest学习（1）

pytest是python的一个测试框架，主要是用来进行一些小的测试。

在pycharm中，缺省用的是unittest，这里说明如何设置为pytest。

当然，第一部是安装pytest

pip3 install pytest

然后，在pycharm中，files-》settings-》tools=》python integrated tools=》设定default test runner

然后，写一个简单的py程序（记住，test_*.py or *_test.py）：

def inc(x):
    return x + 1

def test_answer():
    assert inc(3) == 5

def test_wcf():
    assert inc(3) > 5

def test_hy():
    assert inc(3) < 5

　　运行后：

C:\Python35\python.exe C:\Users\wcf\AppData\Local\JetBrains\Toolbox\apps\PyCharm-P\ch-0\171.4694.67\helpers\pycharm\_jb_pytest_runner.py --path C:/fitme/work/nltk/test_5.py
Testing started at 18:53 ...
Launching py.test with arguments C:/fitme/work/nltk/test_5.py in C:\fitme\work\nltk
============================= test session starts =============================
platform win32 -- Python 3.5.3, pytest-3.1.3, py-1.4.34, pluggy-0.4.0
rootdir: C:\fitme\work\nltk, inifile:
collected 3 items

test_5.py F
test_5.py:3 (test_answer)
def test_answer():
>       assert inc(3) == 5
E       assert 4 == 5
E        +  where 4 = inc(3)

test_5.py:5: AssertionError
F
test_5.py:6 (test_wcf)
def test_wcf():
>       assert inc(3) > 5
E       assert 4 > 5
E        +  where 4 = inc(3)

test_5.py:8: AssertionError
.

================================== FAILURES ===================================
_________________________________ test_answer _________________________________

    def test_answer():
>       assert inc(3) == 5
E       assert 4 == 5
E        +  where 4 = inc(3)

test_5.py:5: AssertionError
__________________________________ test_wcf ___________________________________

    def test_wcf():
>       assert inc(3) > 5
E       assert 4 > 5
E        +  where 4 = inc(3)

test_5.py:8: AssertionError
===================== 2 failed, 1 passed in 0.05 seconds ======================

Process finished with exit code 0

　如果只运行pytest，则对当前目录下所有的test_*.py or *_test.py文件都进行测试。