pytest3-命令行选项

1.pytest -h 查看pytest常用命令

E:myprojpytest_demo>pytest -h
usage: pytest [options] [file_or_dir] [file_or_dir] [...]

positional arguments:
  file_or_dir

general:
  -k EXPRESSION         only run tests which match the given substring
                        expression. An expression is a python evaluatable
                        expression where all names are substring-matched
...以下略

2.pytest -vs（-v是啰嗦模式，啥信息都显示；-s允许测试运行时输出任何符合标准的输出流信息，例如代码里面的print）

执行结果：
E:myprojpytest_demo>pytest -vs
================================================================================== test session starts ==================================================================================
platform win32 -- Python 3.6.5, pytest-5.1.2, py-1.8.0, pluggy-0.12.0 -- e:softpythonpython36python.exe
cachedir: .pytest_cache
rootdir: E:myprojpytest_demo, inifile: pytest.ini, testpaths: ./testcases
collected 9 items                                                                                                                                                                        

testcases/test_02.py::test_1 FAILED              # FAILED指测试失败
testcases/test_02.py::test_2 b
PASSED  # 指测试通过
testcases/test_02.py::test_3 c
PASSED
testcases/test_fix.py::Test1::test_s1[u6d4bu8bd5-u6d4bu8bd5] 测试
PASSED
testcases/test_fix.py::Test1::test_s2 用例2：不需要登录，操作222
PASSED
testcases/test_fix.py::Test1::test_s3 登录系统
用例3：登录之后其它动作333
PASSED
testcases/test_fix.py::Test2::test_s4 登录系统
用例4：登录之后其它动作444
PASSED
testcases/test_fix.py::Test2::test_s5 用例5：不需要登录，操作555
PASSED
testcases/test_fix.py::Test2::test_s6 用例6：登录之后其它动作666
PASSED

======================================================================================= FAILURES ========================================================================================
________________________________________________________________________________________ test_1 _________________________________________________________________________________________

    def test_1():
        a = 2
>       assert a == 1
E       assert 2 == 1
E         -2
E         +1

testcases	est_02.py:9: AssertionError
============================================================================== 1 failed, 8 passed in 0.29s ==============================================================================

 3.pytest --lf --ff

--lf, --last-failed rerun only the tests that failed at the last run (or          # 运行上次失败的用例，如果没有失败会重新跑
all if none failed)
--ff, --failed-first run all tests but run the last failures first. This
may re-order tests and thus lead to repeated fixture
setup/teardown

4.pytest -x ： exit instantly on first error or failed test

5.pytest -q 简化输出信息

6.pytest --tb=no 关闭错误信息回溯 argument --tb: (choose from 'short', 'no', 'line')

7.pytest --markers ：查看所有markers

8.pytest -m “mark标记名”：运行指定标记的测试用例

9.pytest -k