test_fixtures.py 文件源码

def test_output(self):
        self.useFixture(fx.EnvironmentVariable('OS_STDOUT_CAPTURE', '1'))
        self.useFixture(fx.EnvironmentVariable('OS_STDERR_CAPTURE', '1'))

        out = self.useFixture(fixtures.OutputStreamCapture())
        sys.stdout.write("foo")
        sys.stderr.write("bar")
        self.assertEqual("foo", out.stdout)
        self.assertEqual("bar", out.stderr)
        # TODO(sdague): nuke the out and err buffers so it doesn't
        # make it to testr