如何从pytest中获取通过、失败和跳过的测试总数

Question

How can I get to the statistics information of a test session in pytest?

I've tried to define pytest_sessionfinish in the conftest.py file, but I only see testsfailed and testscollected attributes on there.

I also need to know the number of tests passed, skipped and the total time it took. Since pytest prints that info at the end of each session, I assume there's a programmatic way to retrieve that.

Answer 1

Use the pytest_terminal_summary hook. The stats are provided by the terminalreporter object. Example:

# conftest.py

def pytest_terminal_summary(terminalreporter, exitstatus, config):
    print('passed amount:', len(terminalreporter.stats['passed']))
    print('failed amount:', len(terminalreporter.stats['failed']))
    print('xfailed amount:', len(terminalreporter.stats['xfailed']))
    print('skipped amount:', len(terminalreporter.stats['skipped']))

    duration = time.time() - terminalreporter._sessionstarttime
    print('duration:', duration, 'seconds')

Unfortunately, _pytest.terminal.TerminalReporter isn't part of the public API yet, so it's best to inspect its code directly.

---

If you need to access the stats in another hook like pytest_sessionfinish , use the plugin manager, eg:

def pytest_sessionfinish(session, exitstatus):
    reporter = session.config.pluginmanager.get_plugin('terminalreporter')
    print('passed amount:', len(reporter.stats['passed']))
    ...

However, depending on what hook you are in, you may not get the complete stats/correct duration, so caution advised.