pytest帮你写出更好的程序
1、An example of a simple test:（一个简单的例子），命名为test_pytest1.py
def funx(x):
return x + 1
def test_answer():
assert funx(2) == 5
运行：
进入python脚本路径：pytest test_pytest1.py
root@localhost:/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 ===========================
2.进入python脚本路径：pytest -q test_pytest1.py（加一个参数-q）,运行结果：
root@localhost:/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。
# 一个测试类种创建多个测试用例
class TestClass:
def test_one(self):
x = "this"
assert "s" in x
def test_two(self):
x = "hello"
assert x == "hi"
4、pytest同样可以提供main()函数来执行测试用例：
目录结构：
"""
pytest中同样提供了main() 来函数来执行测试用例。
pytest/
├── test_pytest1.py
├── test_pytest2.py
└── test_main.py
"""
注：主函数中的文件名只能是test_main.py(如果改为test_pytest3这种格式，将不会遍历执行同路径的其他用例)
import pytest
def test_main():
assert 5 != 5
if __name__ == "__main__":
# pytest.main() # 遍历相同目录下的所以test开头的用例
# pytest.main("-q test_main.py") # 指定测试文件
pytest.main("/root/Documents/python3_1000/1000/python3_pytest") # 指定测试目录
5、pytest生成Html格式的测试报告：
python3 -m pytest test_main.py --html=report/test_main.html
