base.py 文件源码

def setUp(self):
        super(OutputStreamCapture, self).setUp()
        if os.environ.get('OS_STDOUT_CAPTURE') in _TRUE_VALUES:
            self.out = self.useFixture(fixtures.StringStream('stdout'))
            self.useFixture(
                fixtures.MonkeyPatch('sys.stdout', self.out.stream))
        if os.environ.get('OS_STDERR_CAPTURE') in _TRUE_VALUES:
            self.err = self.useFixture(fixtures.StringStream('stderr'))
            self.useFixture(
                fixtures.MonkeyPatch('sys.stderr', self.err.stream))