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#!/usr/bin/env python3
# Copyright 2017 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
import subprocess
import sys
import tempfile
import unittest
TOOLS_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
PREDICTABLE_WRAPPER = os.path.join(
TOOLS_DIR, 'predictable_wrapper.py')
PREDICTABLE_MOCKED = os.path.join(
TOOLS_DIR, 'unittests', 'testdata', 'predictable_mocked.py')
def call_wrapper(mode):
"""Call the predictable wrapper under test with a mocked file to test.
Instead of d8, we use python and a python mock script. This mock script is
expecting two arguments, mode (one of 'equal', 'differ' or 'missing') and
a path to a temporary file for simulating non-determinism.
"""
fd, state_file = tempfile.mkstemp()
os.close(fd)
try:
args = [
sys.executable,
PREDICTABLE_WRAPPER,
sys.executable,
PREDICTABLE_MOCKED,
mode,
state_file,
]
proc = subprocess.Popen(args, stdout=subprocess.PIPE)
proc.communicate()
return proc.returncode
finally:
os.unlink(state_file)
class PredictableTest(unittest.TestCase):
def testEqualAllocationOutput(self):
self.assertEqual(0, call_wrapper('equal'))
def testNoAllocationOutput(self):
self.assertEqual(2, call_wrapper('missing'))
def testDifferentAllocationOutput(self):
self.assertEqual(3, call_wrapper('differ'))
if __name__ == '__main__':
unittest.main()
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