#!/usr/bin/env python
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# Copyright 2017 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import os
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import subprocess
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import sys
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import tempfile
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import unittest
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TOOLS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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PREDICTABLE_WRAPPER = os.path.join(
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TOOLS_DIR, 'predictable_wrapper.py')
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PREDICTABLE_MOCKED = os.path.join(
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TOOLS_DIR, 'unittests', 'testdata', 'predictable_mocked.py')
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def call_wrapper(mode):
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"""Call the predictable wrapper under test with a mocked file to test.
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Instead of d8, we use python and a python mock script. This mock script is
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expecting two arguments, mode (one of 'equal', 'differ' or 'missing') and
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a path to a temporary file for simulating non-determinism.
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"""
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fd, state_file = tempfile.mkstemp()
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os.close(fd)
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try:
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args = [
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sys.executable,
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PREDICTABLE_WRAPPER,
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sys.executable,
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PREDICTABLE_MOCKED,
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mode,
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state_file,
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]
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proc = subprocess.Popen(args, stdout=subprocess.PIPE)
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proc.communicate()
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return proc.returncode
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finally:
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os.unlink(state_file)
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class PredictableTest(unittest.TestCase):
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def testEqualAllocationOutput(self):
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self.assertEqual(0, call_wrapper('equal'))
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def testNoAllocationOutput(self):
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self.assertEqual(2, call_wrapper('missing'))
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def testDifferentAllocationOutput(self):
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self.assertEqual(3, call_wrapper('differ'))
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if __name__ == '__main__':
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unittest.main()
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