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128 lines
3.9 KiB
128 lines
3.9 KiB
import os
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import shutil
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import subprocess
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from subprocess import Popen
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import sys
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from tempfile import mkdtemp
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import time
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import unittest
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class AutoreloadTest(unittest.TestCase):
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def setUp(self):
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self.path = mkdtemp()
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def tearDown(self):
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try:
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shutil.rmtree(self.path)
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except OSError:
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# Windows disallows deleting files that are in use by
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# another process, and even though we've waited for our
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# child process below, it appears that its lock on these
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# files is not guaranteed to be released by this point.
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# Sleep and try again (once).
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time.sleep(1)
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shutil.rmtree(self.path)
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def test_reload_module(self):
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main = """\
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import os
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import sys
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from tornado import autoreload
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# This import will fail if path is not set up correctly
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import testapp
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print('Starting')
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if 'TESTAPP_STARTED' not in os.environ:
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os.environ['TESTAPP_STARTED'] = '1'
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sys.stdout.flush()
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autoreload._reload()
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"""
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# Create temporary test application
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os.mkdir(os.path.join(self.path, "testapp"))
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open(os.path.join(self.path, "testapp/__init__.py"), "w").close()
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with open(os.path.join(self.path, "testapp/__main__.py"), "w") as f:
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f.write(main)
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# Make sure the tornado module under test is available to the test
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# application
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pythonpath = os.getcwd()
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if "PYTHONPATH" in os.environ:
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pythonpath += os.pathsep + os.environ["PYTHONPATH"]
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p = Popen(
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[sys.executable, "-m", "testapp"],
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stdout=subprocess.PIPE,
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cwd=self.path,
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env=dict(os.environ, PYTHONPATH=pythonpath),
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universal_newlines=True,
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)
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out = p.communicate()[0]
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self.assertEqual(out, "Starting\nStarting\n")
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def test_reload_wrapper_preservation(self):
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# This test verifies that when `python -m tornado.autoreload`
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# is used on an application that also has an internal
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# autoreload, the reload wrapper is preserved on restart.
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main = """\
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import os
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import sys
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# This import will fail if path is not set up correctly
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import testapp
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if 'tornado.autoreload' not in sys.modules:
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raise Exception('started without autoreload wrapper')
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import tornado.autoreload
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print('Starting')
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sys.stdout.flush()
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if 'TESTAPP_STARTED' not in os.environ:
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os.environ['TESTAPP_STARTED'] = '1'
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# Simulate an internal autoreload (one not caused
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# by the wrapper).
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tornado.autoreload._reload()
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else:
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# Exit directly so autoreload doesn't catch it.
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os._exit(0)
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"""
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# Create temporary test application
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os.mkdir(os.path.join(self.path, "testapp"))
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init_file = os.path.join(self.path, "testapp", "__init__.py")
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open(init_file, "w").close()
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main_file = os.path.join(self.path, "testapp", "__main__.py")
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with open(main_file, "w") as f:
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f.write(main)
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# Make sure the tornado module under test is available to the test
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# application
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pythonpath = os.getcwd()
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if "PYTHONPATH" in os.environ:
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pythonpath += os.pathsep + os.environ["PYTHONPATH"]
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autoreload_proc = Popen(
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[sys.executable, "-m", "tornado.autoreload", "-m", "testapp"],
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stdout=subprocess.PIPE,
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cwd=self.path,
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env=dict(os.environ, PYTHONPATH=pythonpath),
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universal_newlines=True,
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)
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# This timeout needs to be fairly generous for pypy due to jit
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# warmup costs.
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for i in range(40):
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if autoreload_proc.poll() is not None:
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break
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time.sleep(0.1)
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else:
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autoreload_proc.kill()
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raise Exception("subprocess failed to terminate")
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out = autoreload_proc.communicate()[0]
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self.assertEqual(out, "Starting\n" * 2)
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