python单元测试框架——pytest

官网：https://docs.pytest.org/en/latest/

pytest帮你写出更好的程序

1、安装：

　　Ubuntu16.04安装pytest：

　　pip3 install pytest

　　pytest --version

　　　　This is pytest version 3.2.3, imported from /usr/local/lib/python3.5/dist-packages/pytest.py

2、An example of a simple test:（一个简单的例子），命名为test_pytest1.py

1 def funx(x):
2     return x + 1
3
4
5 def test_answer():
6     assert funx(2) == 5

运行：

进入python脚本路径：pytest test_pytest1.py

　　[email protected]:/home/ranxf/Python3单元测试/demo# pytest test_pytest1.py
============================= test session starts ==============================
platform linux -- Python 3.5.2, pytest-3.2.3, py-1.4.34, pluggy-0.4.0
rootdir: /home/ranxf/Python3单元测试/demo, inifile:
collected 1 item

test_pytest1.py F

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

def test_answer():
>       assert funx(2) == 5
E       assert 3 == 5
E        +  where 3 = funx(2)

test_pytest1.py:8: AssertionError
=========================== 1 failed in 0.02 seconds ===========================

进入python脚本路径：pytest -q test_pytest1.py（加一个参数-q）,运行结果：

[email protected]:/home/ranxf/Python3单元测试/demo# pytest -q test_pytest1.py
F
=================================== FAILURES ===================================
_________________________________ test_answer __________________________________

def test_answer():
>       assert funx(2) == 5
E       assert 3 == 5
E        +  where 3 = funx(2)

test_pytest1.py:8: AssertionError
1 failed in 0.02 seconds

两种运行结果有一点差异，就是少了一些版本信息。

3、一个测试类中创建多个测试用例：

 1 # 一个测试类种创建多个测试用例
 2
 3
 4 class TestClass:
 5     def test_one(self):
 6         x = "this"
 7         assert "s" in x
 8
 9     def test_two(self):
10         x = "hello"
11         assert x == "hi"