pytest

pytest的执行方式 Pytest/py.test(终端，命令行，pycharm可配置pytest方式执行) 1. Pytest –v (最高级别信息—verbose) 2. pytest -v -s filename(输出打印) 3.Pytest-q (静默) 搜索用例原则 1.pytest将在当前目录及其子目录中运行test _ * .py或* _test.py形 式的所有文件。 2.以test_开头的函数，以Test开头的类，以test_开头的方法。所有包 package都要有__init__.py文件。 3.Pytest可以执行unittest框架写的用例和方法 来源： https://www.cnblogs.com/QaStudy/p/11637191.html

import pytestdef setup_module(): print('整个模块.py开始')def teardown_module(): print('整个模块的.py结束')def setup_function(): print('不在类中的函数前')def teardown_function(): print('不在类中的函数后')def test_w_one(): print('不在类中的方法1')def test_w_two(): print('不在类中的方法2')class TestClass: def setup_class(self): print('类前面') def teardown_class(self): print('类之后') def setup_method(self): print('方法前') def teardown_method(self): print('方法后') def test_one(self): x='this' assert 'h' in x def test_two(self): x='hello' assert 'h4'==x def test_three(self): a='hello' b='hello world' assert a in bif __name__ == '__main__': pytest

前言： 有使用过unittest单元测试框架，再使用pytest单元测试框架，就可以明显感觉到pytest比unittest真的简洁、方便很多。 unittest与pytest的区别： 主要从用例编写规则、用例的前置和后置、参数化、断言、用例执行、失败重运行和报告这几个方面比较unittest和pytest的区别 来源： https://www.cnblogs.com/cuitang/p/11635103.html

I asked this question about how to write a pytest to check output in stdout and got a solution. Now I need to write a test case , to check if the contents are written to the file and that the contents are written as expected eg: def writetoafile(): file = open("output.txt",w) file.write("hello\n") file.write("world\n") file.close() now a pytest function to check if it written: def test_writeToFile(): file = open("ouput.txt",'r') expected = "hello\nworld\n" assert expected==file.read() while this seems to work, I do not think this is ideal, especially hard-coding. how are these kind of test

fixture的参数可以解决大量重复代码工作,比如数据库的连接、查询、关闭等.同样可以使用参数化来测试多条数据用例 例一、 import pytest @pytest.fixture(params=[("redis", "6379"), ("elasticsearch", "9200")]) def params(request): return request.param @pytest.fixture() def db(params): print(f"\nuse to connection: {params}") yield print(f"\nclose to connection:{params}") @pytest.mark.usefixtures("db") def test_demo(): assert 1 == 1 运行结果: ╰ pytest -v -s test_data.py ======================================================= test session starts ======================================================== platform darwin -- Python 3.7.4, pytest-4.4.0, py-1.8.0,

除了使用pytest.fixture.userfixtures和传参两种显式的调用fixture之外.也可以自动的执行fixture,在定义fixture的时候设置autouser=True即可 from datetime import datetime from time import sleep import pytest @pytest.fixture(autouse=True) def timer_session_scope(): start = datetime.now() print(f"\nstart:{start}") yield end = datetime.now() print(f"total time cost:{end - start}") def test_timer(): sleep(1.3) assert 2 == 2 运行结果: ╰ pytest -v -s test_data.py ======================================================= test session starts ======================================================== platform darwin -- Python 3.7.4, pytest-4.4.0, py-1