324 lines
12 KiB
Python
324 lines
12 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2009 Google Inc. All Rights Reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Verifies that test shuffling works."""
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import os
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import gtest_test_utils
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# Command to run the googletest-shuffle-test_ program.
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COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-shuffle-test_')
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# The environment variables for test sharding.
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TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
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SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
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TEST_FILTER = 'A*.A:A*.B:C*'
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ALL_TESTS = []
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ACTIVE_TESTS = []
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FILTERED_TESTS = []
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SHARDED_TESTS = []
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SHUFFLED_ALL_TESTS = []
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SHUFFLED_ACTIVE_TESTS = []
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SHUFFLED_FILTERED_TESTS = []
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SHUFFLED_SHARDED_TESTS = []
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def AlsoRunDisabledTestsFlag():
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return '--gtest_also_run_disabled_tests'
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def FilterFlag(test_filter):
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return '--gtest_filter=%s' % (test_filter,)
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def RepeatFlag(n):
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return '--gtest_repeat=%s' % (n,)
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def ShuffleFlag():
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return '--gtest_shuffle'
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def RandomSeedFlag(n):
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return '--gtest_random_seed=%s' % (n,)
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def RunAndReturnOutput(extra_env, args):
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"""Runs the test program and returns its output."""
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environ_copy = os.environ.copy()
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environ_copy.update(extra_env)
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return gtest_test_utils.Subprocess([COMMAND] + args, env=environ_copy).output
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def GetTestsForAllIterations(extra_env, args):
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"""Runs the test program and returns a list of test lists.
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Args:
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extra_env: a map from environment variables to their values
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args: command line flags to pass to googletest-shuffle-test_
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Returns:
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A list where the i-th element is the list of tests run in the i-th
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test iteration.
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"""
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test_iterations = []
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for line in RunAndReturnOutput(extra_env, args).split('\n'):
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if line.startswith('----'):
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tests = []
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test_iterations.append(tests)
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elif line.strip():
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tests.append(line.strip()) # 'TestCaseName.TestName'
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return test_iterations
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def GetTestCases(tests):
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"""Returns a list of test cases in the given full test names.
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Args:
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tests: a list of full test names
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Returns:
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A list of test cases from 'tests', in their original order.
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Consecutive duplicates are removed.
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"""
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test_cases = []
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for test in tests:
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test_case = test.split('.')[0]
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if not test_case in test_cases:
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test_cases.append(test_case)
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return test_cases
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def CalculateTestLists():
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"""Calculates the list of tests run under different flags."""
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if not ALL_TESTS:
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ALL_TESTS.extend(
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GetTestsForAllIterations({}, [AlsoRunDisabledTestsFlag()])[0])
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if not ACTIVE_TESTS:
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ACTIVE_TESTS.extend(GetTestsForAllIterations({}, [])[0])
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if not FILTERED_TESTS:
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FILTERED_TESTS.extend(
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GetTestsForAllIterations({}, [FilterFlag(TEST_FILTER)])[0])
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if not SHARDED_TESTS:
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SHARDED_TESTS.extend(
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GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
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SHARD_INDEX_ENV_VAR: '1'},
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[])[0])
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if not SHUFFLED_ALL_TESTS:
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SHUFFLED_ALL_TESTS.extend(GetTestsForAllIterations(
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{}, [AlsoRunDisabledTestsFlag(), ShuffleFlag(), RandomSeedFlag(1)])[0])
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if not SHUFFLED_ACTIVE_TESTS:
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SHUFFLED_ACTIVE_TESTS.extend(GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(1)])[0])
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if not SHUFFLED_FILTERED_TESTS:
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SHUFFLED_FILTERED_TESTS.extend(GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(1), FilterFlag(TEST_FILTER)])[0])
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if not SHUFFLED_SHARDED_TESTS:
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SHUFFLED_SHARDED_TESTS.extend(
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GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
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SHARD_INDEX_ENV_VAR: '1'},
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[ShuffleFlag(), RandomSeedFlag(1)])[0])
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class GTestShuffleUnitTest(gtest_test_utils.TestCase):
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"""Tests test shuffling."""
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def setUp(self):
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CalculateTestLists()
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def testShufflePreservesNumberOfTests(self):
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self.assertEqual(len(ALL_TESTS), len(SHUFFLED_ALL_TESTS))
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self.assertEqual(len(ACTIVE_TESTS), len(SHUFFLED_ACTIVE_TESTS))
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self.assertEqual(len(FILTERED_TESTS), len(SHUFFLED_FILTERED_TESTS))
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self.assertEqual(len(SHARDED_TESTS), len(SHUFFLED_SHARDED_TESTS))
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def testShuffleChangesTestOrder(self):
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self.assert_(SHUFFLED_ALL_TESTS != ALL_TESTS, SHUFFLED_ALL_TESTS)
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self.assert_(SHUFFLED_ACTIVE_TESTS != ACTIVE_TESTS, SHUFFLED_ACTIVE_TESTS)
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self.assert_(SHUFFLED_FILTERED_TESTS != FILTERED_TESTS,
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SHUFFLED_FILTERED_TESTS)
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self.assert_(SHUFFLED_SHARDED_TESTS != SHARDED_TESTS,
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SHUFFLED_SHARDED_TESTS)
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def testShuffleChangesTestCaseOrder(self):
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self.assert_(GetTestCases(SHUFFLED_ALL_TESTS) != GetTestCases(ALL_TESTS),
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GetTestCases(SHUFFLED_ALL_TESTS))
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self.assert_(
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GetTestCases(SHUFFLED_ACTIVE_TESTS) != GetTestCases(ACTIVE_TESTS),
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GetTestCases(SHUFFLED_ACTIVE_TESTS))
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self.assert_(
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GetTestCases(SHUFFLED_FILTERED_TESTS) != GetTestCases(FILTERED_TESTS),
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GetTestCases(SHUFFLED_FILTERED_TESTS))
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self.assert_(
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GetTestCases(SHUFFLED_SHARDED_TESTS) != GetTestCases(SHARDED_TESTS),
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GetTestCases(SHUFFLED_SHARDED_TESTS))
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def testShuffleDoesNotRepeatTest(self):
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for test in SHUFFLED_ALL_TESTS:
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self.assertEqual(1, SHUFFLED_ALL_TESTS.count(test),
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'%s appears more than once' % (test,))
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for test in SHUFFLED_ACTIVE_TESTS:
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self.assertEqual(1, SHUFFLED_ACTIVE_TESTS.count(test),
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'%s appears more than once' % (test,))
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for test in SHUFFLED_FILTERED_TESTS:
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self.assertEqual(1, SHUFFLED_FILTERED_TESTS.count(test),
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'%s appears more than once' % (test,))
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for test in SHUFFLED_SHARDED_TESTS:
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self.assertEqual(1, SHUFFLED_SHARDED_TESTS.count(test),
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'%s appears more than once' % (test,))
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def testShuffleDoesNotCreateNewTest(self):
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for test in SHUFFLED_ALL_TESTS:
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self.assert_(test in ALL_TESTS, '%s is an invalid test' % (test,))
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for test in SHUFFLED_ACTIVE_TESTS:
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self.assert_(test in ACTIVE_TESTS, '%s is an invalid test' % (test,))
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for test in SHUFFLED_FILTERED_TESTS:
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self.assert_(test in FILTERED_TESTS, '%s is an invalid test' % (test,))
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for test in SHUFFLED_SHARDED_TESTS:
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self.assert_(test in SHARDED_TESTS, '%s is an invalid test' % (test,))
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def testShuffleIncludesAllTests(self):
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for test in ALL_TESTS:
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self.assert_(test in SHUFFLED_ALL_TESTS, '%s is missing' % (test,))
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for test in ACTIVE_TESTS:
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self.assert_(test in SHUFFLED_ACTIVE_TESTS, '%s is missing' % (test,))
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for test in FILTERED_TESTS:
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self.assert_(test in SHUFFLED_FILTERED_TESTS, '%s is missing' % (test,))
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for test in SHARDED_TESTS:
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self.assert_(test in SHUFFLED_SHARDED_TESTS, '%s is missing' % (test,))
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def testShuffleLeavesDeathTestsAtFront(self):
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non_death_test_found = False
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for test in SHUFFLED_ACTIVE_TESTS:
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if 'DeathTest.' in test:
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self.assert_(not non_death_test_found,
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'%s appears after a non-death test' % (test,))
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else:
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non_death_test_found = True
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def _VerifyTestCasesDoNotInterleave(self, tests):
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test_cases = []
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for test in tests:
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[test_case, _] = test.split('.')
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if test_cases and test_cases[-1] != test_case:
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test_cases.append(test_case)
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self.assertEqual(1, test_cases.count(test_case),
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'Test case %s is not grouped together in %s' %
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(test_case, tests))
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def testShuffleDoesNotInterleaveTestCases(self):
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self._VerifyTestCasesDoNotInterleave(SHUFFLED_ALL_TESTS)
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self._VerifyTestCasesDoNotInterleave(SHUFFLED_ACTIVE_TESTS)
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self._VerifyTestCasesDoNotInterleave(SHUFFLED_FILTERED_TESTS)
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self._VerifyTestCasesDoNotInterleave(SHUFFLED_SHARDED_TESTS)
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def testShuffleRestoresOrderAfterEachIteration(self):
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# Get the test lists in all 3 iterations, using random seed 1, 2,
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# and 3 respectively. Google Test picks a different seed in each
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# iteration, and this test depends on the current implementation
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# picking successive numbers. This dependency is not ideal, but
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# makes the test much easier to write.
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[tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
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GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
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# Make sure running the tests with random seed 1 gets the same
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# order as in iteration 1 above.
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[tests_with_seed1] = GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(1)])
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self.assertEqual(tests_in_iteration1, tests_with_seed1)
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# Make sure running the tests with random seed 2 gets the same
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# order as in iteration 2 above. Success means that Google Test
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# correctly restores the test order before re-shuffling at the
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# beginning of iteration 2.
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[tests_with_seed2] = GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(2)])
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self.assertEqual(tests_in_iteration2, tests_with_seed2)
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# Make sure running the tests with random seed 3 gets the same
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# order as in iteration 3 above. Success means that Google Test
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# correctly restores the test order before re-shuffling at the
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# beginning of iteration 3.
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[tests_with_seed3] = GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(3)])
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self.assertEqual(tests_in_iteration3, tests_with_seed3)
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def testShuffleGeneratesNewOrderInEachIteration(self):
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[tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
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GetTestsForAllIterations(
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{}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
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self.assert_(tests_in_iteration1 != tests_in_iteration2,
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tests_in_iteration1)
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self.assert_(tests_in_iteration1 != tests_in_iteration3,
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tests_in_iteration1)
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self.assert_(tests_in_iteration2 != tests_in_iteration3,
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tests_in_iteration2)
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def testShuffleShardedTestsPreservesPartition(self):
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# If we run M tests on N shards, the same M tests should be run in
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# total, regardless of the random seeds used by the shards.
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[tests1] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
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SHARD_INDEX_ENV_VAR: '0'},
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[ShuffleFlag(), RandomSeedFlag(1)])
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[tests2] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
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SHARD_INDEX_ENV_VAR: '1'},
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[ShuffleFlag(), RandomSeedFlag(20)])
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[tests3] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
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SHARD_INDEX_ENV_VAR: '2'},
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[ShuffleFlag(), RandomSeedFlag(25)])
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sorted_sharded_tests = tests1 + tests2 + tests3
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sorted_sharded_tests.sort()
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sorted_active_tests = []
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sorted_active_tests.extend(ACTIVE_TESTS)
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sorted_active_tests.sort()
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self.assertEqual(sorted_active_tests, sorted_sharded_tests)
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if __name__ == '__main__':
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gtest_test_utils.Main()
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