Method run_subprocess

tornado/test/autoreload_test.py:73–105

(self, args)

                    f.write(textwrap.dedent(contents))

    def run_subprocess(self, args):
        # Make sure the tornado module under test is available to the test
        # application
        parts = [os.getcwd()]
        if "PYTHONPATH" in os.environ:
            parts += [
                os.path.join(os.getcwd(), part)
                for part in os.environ["PYTHONPATH"].split(os.pathsep)
            ]
        pythonpath = os.pathsep.join(parts)

        p = Popen(
            args,
            stdout=subprocess.PIPE,
            env=dict(os.environ, PYTHONPATH=pythonpath),
            cwd=self.path,
            universal_newlines=True,
            encoding="utf-8",
        )

        # This timeout needs to be fairly generous for pypy due to jit
        # warmup costs.
        for i in range(40):
            if p.poll() is not None:
                break
            time.sleep(0.1)
        else:
            p.kill()
            raise Exception("subprocess failed to terminate")

        out = p.communicate()[0]
        self.assertEqual(p.returncode, 0)
        return out

    def test_reload(self):
        main = """\