在用pytest執行測試用例的時候，有時需要根據用例執行的結果，做一些其他的操作，比如：在用selenium做自動化測試的時候，如果用例執行失敗，需要截圖，方便以後排查原因：

方法1：

from _pytest.runner import runtestprotocol
from _pytest.runner import pytest_runtest_makereport

def pytest_runtest_protocol(item):
    reports = runtestprotocol(item)
    for report in reports:
        if
 
 report.when == 'call':
            if report.outcome == 'failed':
                if browser_option.screen_shot:
                    report_dir = browser_option.report_dir
                    picture_name = item.name + '.png'
                    picture_path = join(report_dir, picture_name)
                    context.browser.save_screenshot(picture_path)
 

方法2：

from _pytest.runner import runtestprotocol
from _pytest.runner import pytest_runtest_makereport

@pytest.hookimpl(hookwrapper=True, tryfirst=True)
def pytest_runtest_makereport(item, call):
    outcome = yield
    rep = outcome.get_result()
    setattr(item, "rep_" + rep.when, rep)
    if rep.when == 'call'
 
:
        if rep.failed:
            if browser_option.screen_shot:
                report_dir = browser_option.report_dir
                picture_name = item.name + '.png'
                picture_path = join(report_dir, picture_name)
                context.browser.save_screenshot(picture_path)

方法1雖然也能獲取到中間結果，但是該方法由於呼叫了：runtestprotocol,而導致同一個測試用例會被執行兩次，而方法2則不會，所以方法2更加合適。