1. 前言

命令行参数是根据命令行选项将不同的值传递给测试函数，比如平常在cmd执行”pytest —html=report.html”,这里面的”—html=report.html“就是从命令行传入的参数
对应的参数名称是html，参数值是report.html

2.contetest配置参数

1.首先需要在contetest.py添加命令行选项,命令行传入参数”—cmdopt“, 用例如果需要用到从命令行传入的参数，就调用cmdopt函数：

# content of conftest.py
import pytest

def pytest_addoption(parser):
    parser.addoption(
        "--cmdopt", action="store", default="type1", help="my option: type1 or type2"
    )

@pytest.fixture
def cmdopt(request):
    return request.config.getoption("--cmdopt")

2.测试用例编写案例

# content of test_sample.py
import pytest
def test_answer(cmdopt):
    if cmdopt == "type1":
        print("first")
    elif cmdopt == "type2":
        print("second")
    assert 0  # to see what was printed

if __name__ == "__main__":
    pytest.main(["-s", "test_case1.py"])

运行结果：

>pytest -s
============================= test session starts =============================
test_sample.py first
F

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

cmdopt = 'type1'

    def test_answer(cmdopt):
        if cmdopt == "type1":
            print("first")
        elif cmdopt == "type2":
            print("second")
>       assert 0  # to see what was printed
E       assert 0

test_case1.py:8: AssertionError
========================== 1 failed in 0.05 seconds ===========================

3. 带参数启动

1.如果不带参数执行，那么传默认的default=”type1”，接下来在命令行带上参数去执行

$ pytest -s test_sample.py --cmdopt=type2

test_sample.py second
F

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

cmdopt = 'type2'

    def test_answer(cmdopt):
        if cmdopt == "type1":
            print("first")
        elif cmdopt == "type2":
            print("second")
>       assert 0  # to see what was printed
E       assert 0

test_case1.py:8: AssertionError
========================== 1 failed in 0.05 seconds ===========================