pytest学习和使用1-pytest安装和版本查看

1 学习来源

https://docs.pytest.org/en/latest/index.html

2 依赖的环境

环境	版本
python	>=3.6
平台	支持linux、windows

3 本文学习环境

• Python：3.7.0
  
• 操作系统：windows10，64位

• Pycharm：2020.2

4 pytest安装

• 打开cmd命令行，直接输入：

pip install -U pytest

• 安装如下：

C:\Users\Administrator>pip install -U pytest
Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Requirement already satisfied: pytest in d:\python37\lib\site-packages (5.3.2)
Collecting pytest
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/a1/59/6821e900592fbe261f19d67e4def0cb27e52ef8ed16d9922c144961cc1ee/pytest-6.2.4-py3-none-any.whl (280 kB)
     |████████████████████████████████| 280 kB 1.6 MB/s
Requirement already satisfied: importlib-metadata>=0.12 in d:\python37\lib\site-packages (from pytest) (2.1.1)
Requirement already satisfied: pluggy<1.0.0a1,>=0.12 in d:\python37\lib\site-packages (from pytest) (0.13.1)
Requirement already satisfied: colorama in d:\python37\lib\site-packages (from pytest) (0.4.4)
Requirement already satisfied: atomicwrites>=1.0 in d:\python37\lib\site-packages (from pytest) (1.4.0)
Requirement already satisfied: toml in d:\python37\lib\site-packages (from pytest) (0.10.2)
Requirement already satisfied: packaging in d:\python37\lib\site-packages (from pytest) (20.8)
Requirement already satisfied: attrs>=19.2.0 in d:\python37\lib\site-packages (from pytest) (20.3.0)
Requirement already satisfied: iniconfig in d:\python37\lib\site-packages (from pytest) (1.1.1)
Requirement already satisfied: py>=1.8.2 in d:\python37\lib\site-packages (from pytest) (1.10.0)
Requirement already satisfied: zipp>=0.5 in d:\python37\lib\site-packages (from importlib-metadata>=0.12->pytest) (1.2.0)
Requirement already satisfied: pyparsing>=2.0.2 in d:\python37\lib\site-packages (from packaging->pytest) (2.4.7)
Installing collected packages: pytest
  Attempting uninstall: pytest
    Found existing installation: pytest 5.3.2
    Uninstalling pytest-5.3.2:
      Successfully uninstalled pytest-5.3.2
Successfully installed pytest-6.2.4

5 查看pytest版本

• 使用pip show命令

pip show pytest

(venv) F:\pytest_study>pip show pytest
Name: pytest
Version: 6.2.4
Summary: pytest: simple powerful testing with Python
Home-page: https://docs.pytest.org/en/latest/
Author: Holger Krekel, Bruno Oliveira, Ronny Pfannschmidt, Floris Bruynooghe, Brianna Laugher, Florian Bruhin and others
Author-email:
License: MIT
Location: d:\python37\lib\site-packages
Requires: pluggy, importlib-metadata, attrs, iniconfig, toml, py, packaging, atomicwrites, colorama
Required-by: pytest-xdist, pytest-rerunfailures, pytest-ordering, pytest-metadata, pytest-html, pytest-forked, pytest-cov, allure-pytest

• 使用--version命令，如果报错提示如下：

    plugin = ep.load()
  File "d:\python37\lib\site-packages\importlib_metadata\__init__.py", line 105, in load
    module = import_module(match.group('module'))
  File "d:\python37\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 1006, in _gcd_import
  File "", line 983, in _find_and_load
  File "", line 967, in _find_and_load_unlocked
  File "", line 677, in _load_unlocked
  File "d:\python37\lib\site-packages\_pytest\assertion\rewrite.py", line 170, in exec_module
    exec(co, module.__dict__)
  File "d:\python37\lib\site-packages\pytest_rerunfailures.py", line 8, in 
    from _pytest.resultlog import ResultLog
ModuleNotFoundError: No module named '_pytest.resultlog'

• 是因为之前安装过pytest-rerunfailures是用例失败重跑，pytest-rerunfailures不能与pytest 6.1.0以上的版本一起使用，所以卸载pytest-rerunfailures后使用pytest-reportlog来代替即可；

# 卸载pytest-rerunfailures
pip uninstall pytest-rerunfailures

# 安装pytest-reportlog
pip install pytest-reportlog

• 再次查看pytest版本OK了

(venv) F:\pytest_study>pytest -V
pytest 6.2.4