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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Unittests for shard.py."""
import os
import sys
import unittest
sys.path.append(os.path.join(os.path.dirname(os.path.realpath(__file__)),
os.pardir, os.pardir))
# Mock out android_commands.GetAttachedDevices().
from pylib import android_commands
android_commands.GetAttachedDevices = lambda: ['0', '1']
from pylib.utils import watchdog_timer
import base_test_result
import shard
class TestException(Exception):
pass
class MockRunner(object):
"""A mock TestRunner."""
def __init__(self, device='0', shard_index=0):
self.device = device
self.shard_index = shard_index
self.setups = 0
self.teardowns = 0
def RunTest(self, test):
results = base_test_result.TestRunResults()
results.AddResult(
base_test_result.BaseTestResult(test, base_test_result.ResultType.PASS))
return (results, None)
def SetUp(self):
self.setups += 1
def TearDown(self):
self.teardowns += 1
class MockRunnerFail(MockRunner):
def RunTest(self, test):
results = base_test_result.TestRunResults()
results.AddResult(
base_test_result.BaseTestResult(test, base_test_result.ResultType.FAIL))
return (results, test)
class MockRunnerFailTwice(MockRunner):
def __init__(self, device='0', shard_index=0):
super(MockRunnerFailTwice, self).__init__(device, shard_index)
self._fails = 0
def RunTest(self, test):
self._fails += 1
results = base_test_result.TestRunResults()
if self._fails <= 2:
results.AddResult(base_test_result.BaseTestResult(
test, base_test_result.ResultType.FAIL))
return (results, test)
else:
results.AddResult(base_test_result.BaseTestResult(
test, base_test_result.ResultType.PASS))
return (results, None)
class MockRunnerException(MockRunner):
def RunTest(self, test):
raise TestException
class TestFunctions(unittest.TestCase):
"""Tests for shard._RunTestsFromQueue."""
@staticmethod
def _RunTests(mock_runner, tests):
results = []
tests = shard._TestCollection([shard._Test(t) for t in tests])
shard._RunTestsFromQueue(mock_runner, tests, results,
watchdog_timer.WatchdogTimer(None), 2)
run_results = base_test_result.TestRunResults()
for r in results:
run_results.AddTestRunResults(r)
return run_results
def testRunTestsFromQueue(self):
results = TestFunctions._RunTests(MockRunner(), ['a', 'b'])
self.assertEqual(len(results.GetPass()), 2)
self.assertEqual(len(results.GetNotPass()), 0)
def testRunTestsFromQueueRetry(self):
results = TestFunctions._RunTests(MockRunnerFail(), ['a', 'b'])
self.assertEqual(len(results.GetPass()), 0)
self.assertEqual(len(results.GetFail()), 2)
def testRunTestsFromQueueFailTwice(self):
results = TestFunctions._RunTests(MockRunnerFailTwice(), ['a', 'b'])
self.assertEqual(len(results.GetPass()), 2)
self.assertEqual(len(results.GetNotPass()), 0)
def testSetUp(self):
runners = []
counter = shard._ThreadSafeCounter()
shard._SetUp(MockRunner, '0', runners, counter)
self.assertEqual(len(runners), 1)
self.assertEqual(runners[0].setups, 1)
def testThreadSafeCounter(self):
counter = shard._ThreadSafeCounter()
for i in xrange(5):
self.assertEqual(counter.GetAndIncrement(), i)
class TestThreadGroupFunctions(unittest.TestCase):
"""Tests for shard._RunAllTests and shard._CreateRunners."""
def setUp(self):
self.tests = ['a', 'b', 'c', 'd', 'e', 'f', 'g']
def testCreate(self):
runners = shard._CreateRunners(MockRunner, ['0', '1'])
for runner in runners:
self.assertEqual(runner.setups, 1)
self.assertEqual(set([r.device for r in runners]),
set(['0', '1']))
self.assertEqual(set([r.shard_index for r in runners]),
set([0, 1]))
def testRun(self):
runners = [MockRunner('0'), MockRunner('1')]
results = shard._RunAllTests(runners, self.tests, 0)
self.assertEqual(len(results.GetPass()), len(self.tests))
def testTearDown(self):
runners = [MockRunner('0'), MockRunner('1')]
shard._TearDownRunners(runners)
for runner in runners:
self.assertEqual(runner.teardowns, 1)
def testRetry(self):
runners = shard._CreateRunners(MockRunnerFail, ['0', '1'])
results = shard._RunAllTests(runners, self.tests, 0)
self.assertEqual(len(results.GetFail()), len(self.tests))
def testReraise(self):
runners = shard._CreateRunners(MockRunnerException, ['0', '1'])
with self.assertRaises(TestException):
shard._RunAllTests(runners, self.tests, 0)
class TestShard(unittest.TestCase):
"""Tests for shard.Shard."""
@staticmethod
def _RunShard(runner_factory):
return shard.ShardAndRunTests(runner_factory, ['0', '1'], ['a', 'b', 'c'])
def testShard(self):
results = TestShard._RunShard(MockRunner)
self.assertEqual(len(results.GetPass()), 3)
def testFailing(self):
results = TestShard._RunShard(MockRunnerFail)
self.assertEqual(len(results.GetPass()), 0)
self.assertEqual(len(results.GetFail()), 3)
def testNoTests(self):
results = shard.ShardAndRunTests(MockRunner, ['0', '1'], [])
self.assertEqual(len(results.GetAll()), 0)
if __name__ == '__main__':
unittest.main()
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