regrtest.py 文件源码

def cleanup_test_droppings(testname, verbose):
    import shutil
    import stat
    import gc

    # First kill any dangling references to open files etc.
    # This can also issue some ResourceWarnings which would otherwise get
    # triggered during the following test run, and possibly produce failures.
    gc.collect()

    # Try to clean up junk commonly left behind.  While tests shouldn't leave
    # any files or directories behind, when a test fails that can be tedious
    # for it to arrange.  The consequences can be especially nasty on Windows,
    # since if a test leaves a file open, it cannot be deleted by name (while
    # there's nothing we can do about that here either, we can display the
    # name of the offending test, which is a real help).
    for name in (support.TESTFN,
                 "db_home",
                ):
        if not os.path.exists(name):
            continue

        if os.path.isdir(name):
            kind, nuker = "directory", shutil.rmtree
        elif os.path.isfile(name):
            kind, nuker = "file", os.unlink
        else:
            raise SystemError("os.path says %r exists but is neither "
                              "directory nor file" % name)

        if verbose:
            print("%r left behind %s %r" % (testname, kind, name))
        try:
            # if we have chmod, fix possible permissions problems
            # that might prevent cleanup
            if (hasattr(os, 'chmod')):
                os.chmod(name, stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
            nuker(name)
        except Exception as msg:
            print(("%r left behind %s %r and it couldn't be "
                "removed: %s" % (testname, kind, name, msg)), file=sys.stderr)