ceph/src/jaegertracing/opentelemetry-cpp/third_party/prometheus-cpp/3rdparty/googletest/googletest/test/googletest-shuffle-test.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2009 Google Inc. All Rights Reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met:
   8 #
   9 #     * Redistributions of source code must retain the above copyright
  10 # notice, this list of conditions and the following disclaimer.
  11 #     * Redistributions in binary form must reproduce the above
  12 # copyright notice, this list of conditions and the following disclaimer
  13 # in the documentation and/or other materials provided with the
  14 # distribution.
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  16 # contributors may be used to endorse or promote products derived from
  17 # this software without specific prior written permission.
  18 #
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  20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30
  31 """Verifies that test shuffling works."""
  32
  33 import os
  34 import gtest_test_utils
  35
  36 # Command to run the googletest-shuffle-test_ program.
  37 COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-shuffle-test_')
  38
  39 # The environment variables for test sharding.
  40 TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
  41 SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
  42
  43 TEST_FILTER = 'A*.A:A*.B:C*'
  44
  45 ALL_TESTS = []
  46 ACTIVE_TESTS = []
  47 FILTERED_TESTS = []
  48 SHARDED_TESTS = []
  49
  50 SHUFFLED_ALL_TESTS = []
  51 SHUFFLED_ACTIVE_TESTS = []
  52 SHUFFLED_FILTERED_TESTS = []
  53 SHUFFLED_SHARDED_TESTS = []
  54
  55
  56 def AlsoRunDisabledTestsFlag():
  57   return '--gtest_also_run_disabled_tests'
  58
  59
  60 def FilterFlag(test_filter):
  61   return '--gtest_filter=%s' % (test_filter,)
  62
  63
  64 def RepeatFlag(n):
  65   return '--gtest_repeat=%s' % (n,)
  66
  67
  68 def ShuffleFlag():
  69   return '--gtest_shuffle'
  70
  71
  72 def RandomSeedFlag(n):
  73   return '--gtest_random_seed=%s' % (n,)
  74
  75
  76 def RunAndReturnOutput(extra_env, args):
  77   """Runs the test program and returns its output."""
  78
  79   environ_copy = os.environ.copy()
  80   environ_copy.update(extra_env)
  81
  82   return gtest_test_utils.Subprocess([COMMAND] + args, env=environ_copy).output
  83
  84
  85 def GetTestsForAllIterations(extra_env, args):
  86   """Runs the test program and returns a list of test lists.
  87
  88   Args:
  89     extra_env: a map from environment variables to their values
  90     args: command line flags to pass to googletest-shuffle-test_
  91
  92   Returns:
  93     A list where the i-th element is the list of tests run in the i-th
  94     test iteration.
  95   """
  96
  97   test_iterations = []
  98   for line in RunAndReturnOutput(extra_env, args).split('\n'):
  99     if line.startswith('----'):
 100       tests = []
 101       test_iterations.append(tests)
 102     elif line.strip():
 103       tests.append(line.strip())  # 'TestCaseName.TestName'
 104
 105   return test_iterations
 106
 107
 108 def GetTestCases(tests):
 109   """Returns a list of test cases in the given full test names.
 110
 111   Args:
 112     tests: a list of full test names
 113
 114   Returns:
 115     A list of test cases from 'tests', in their original order.
 116     Consecutive duplicates are removed.
 117   """
 118
 119   test_cases = []
 120   for test in tests:
 121     test_case = test.split('.')[0]
 122     if not test_case in test_cases:
 123       test_cases.append(test_case)
 124
 125   return test_cases
 126
 127
 128 def CalculateTestLists():
 129   """Calculates the list of tests run under different flags."""
 130
 131   if not ALL_TESTS:
 132     ALL_TESTS.extend(
 133         GetTestsForAllIterations({}, [AlsoRunDisabledTestsFlag()])[0])
 134
 135   if not ACTIVE_TESTS:
 136     ACTIVE_TESTS.extend(GetTestsForAllIterations({}, [])[0])
 137
 138   if not FILTERED_TESTS:
 139     FILTERED_TESTS.extend(
 140         GetTestsForAllIterations({}, [FilterFlag(TEST_FILTER)])[0])
 141
 142   if not SHARDED_TESTS:
 143     SHARDED_TESTS.extend(
 144         GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
 145                                   SHARD_INDEX_ENV_VAR: '1'},
 146                                  [])[0])
 147
 148   if not SHUFFLED_ALL_TESTS:
 149     SHUFFLED_ALL_TESTS.extend(GetTestsForAllIterations(
 150         {}, [AlsoRunDisabledTestsFlag(), ShuffleFlag(), RandomSeedFlag(1)])[0])
 151
 152   if not SHUFFLED_ACTIVE_TESTS:
 153     SHUFFLED_ACTIVE_TESTS.extend(GetTestsForAllIterations(
 154         {}, [ShuffleFlag(), RandomSeedFlag(1)])[0])
 155
 156   if not SHUFFLED_FILTERED_TESTS:
 157     SHUFFLED_FILTERED_TESTS.extend(GetTestsForAllIterations(
 158         {}, [ShuffleFlag(), RandomSeedFlag(1), FilterFlag(TEST_FILTER)])[0])
 159
 160   if not SHUFFLED_SHARDED_TESTS:
 161     SHUFFLED_SHARDED_TESTS.extend(
 162         GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
 163                                   SHARD_INDEX_ENV_VAR: '1'},
 164                                  [ShuffleFlag(), RandomSeedFlag(1)])[0])
 165
 166
 167 class GTestShuffleUnitTest(gtest_test_utils.TestCase):
 168   """Tests test shuffling."""
 169
 170   def setUp(self):
 171     CalculateTestLists()
 172
 173   def testShufflePreservesNumberOfTests(self):
 174     self.assertEqual(len(ALL_TESTS), len(SHUFFLED_ALL_TESTS))
 175     self.assertEqual(len(ACTIVE_TESTS), len(SHUFFLED_ACTIVE_TESTS))
 176     self.assertEqual(len(FILTERED_TESTS), len(SHUFFLED_FILTERED_TESTS))
 177     self.assertEqual(len(SHARDED_TESTS), len(SHUFFLED_SHARDED_TESTS))
 178
 179   def testShuffleChangesTestOrder(self):
 180     self.assert_(SHUFFLED_ALL_TESTS != ALL_TESTS, SHUFFLED_ALL_TESTS)
 181     self.assert_(SHUFFLED_ACTIVE_TESTS != ACTIVE_TESTS, SHUFFLED_ACTIVE_TESTS)
 182     self.assert_(SHUFFLED_FILTERED_TESTS != FILTERED_TESTS,
 183                  SHUFFLED_FILTERED_TESTS)
 184     self.assert_(SHUFFLED_SHARDED_TESTS != SHARDED_TESTS,
 185                  SHUFFLED_SHARDED_TESTS)
 186
 187   def testShuffleChangesTestCaseOrder(self):
 188     self.assert_(GetTestCases(SHUFFLED_ALL_TESTS) != GetTestCases(ALL_TESTS),
 189                  GetTestCases(SHUFFLED_ALL_TESTS))
 190     self.assert_(
 191         GetTestCases(SHUFFLED_ACTIVE_TESTS) != GetTestCases(ACTIVE_TESTS),
 192         GetTestCases(SHUFFLED_ACTIVE_TESTS))
 193     self.assert_(
 194         GetTestCases(SHUFFLED_FILTERED_TESTS) != GetTestCases(FILTERED_TESTS),
 195         GetTestCases(SHUFFLED_FILTERED_TESTS))
 196     self.assert_(
 197         GetTestCases(SHUFFLED_SHARDED_TESTS) != GetTestCases(SHARDED_TESTS),
 198         GetTestCases(SHUFFLED_SHARDED_TESTS))
 199
 200   def testShuffleDoesNotRepeatTest(self):
 201     for test in SHUFFLED_ALL_TESTS:
 202       self.assertEqual(1, SHUFFLED_ALL_TESTS.count(test),
 203                        '%s appears more than once' % (test,))
 204     for test in SHUFFLED_ACTIVE_TESTS:
 205       self.assertEqual(1, SHUFFLED_ACTIVE_TESTS.count(test),
 206                        '%s appears more than once' % (test,))
 207     for test in SHUFFLED_FILTERED_TESTS:
 208       self.assertEqual(1, SHUFFLED_FILTERED_TESTS.count(test),
 209                        '%s appears more than once' % (test,))
 210     for test in SHUFFLED_SHARDED_TESTS:
 211       self.assertEqual(1, SHUFFLED_SHARDED_TESTS.count(test),
 212                        '%s appears more than once' % (test,))
 213
 214   def testShuffleDoesNotCreateNewTest(self):
 215     for test in SHUFFLED_ALL_TESTS:
 216       self.assert_(test in ALL_TESTS, '%s is an invalid test' % (test,))
 217     for test in SHUFFLED_ACTIVE_TESTS:
 218       self.assert_(test in ACTIVE_TESTS, '%s is an invalid test' % (test,))
 219     for test in SHUFFLED_FILTERED_TESTS:
 220       self.assert_(test in FILTERED_TESTS, '%s is an invalid test' % (test,))
 221     for test in SHUFFLED_SHARDED_TESTS:
 222       self.assert_(test in SHARDED_TESTS, '%s is an invalid test' % (test,))
 223
 224   def testShuffleIncludesAllTests(self):
 225     for test in ALL_TESTS:
 226       self.assert_(test in SHUFFLED_ALL_TESTS, '%s is missing' % (test,))
 227     for test in ACTIVE_TESTS:
 228       self.assert_(test in SHUFFLED_ACTIVE_TESTS, '%s is missing' % (test,))
 229     for test in FILTERED_TESTS:
 230       self.assert_(test in SHUFFLED_FILTERED_TESTS, '%s is missing' % (test,))
 231     for test in SHARDED_TESTS:
 232       self.assert_(test in SHUFFLED_SHARDED_TESTS, '%s is missing' % (test,))
 233
 234   def testShuffleLeavesDeathTestsAtFront(self):
 235     non_death_test_found = False
 236     for test in SHUFFLED_ACTIVE_TESTS:
 237       if 'DeathTest.' in test:
 238         self.assert_(not non_death_test_found,
 239                      '%s appears after a non-death test' % (test,))
 240       else:
 241         non_death_test_found = True
 242
 243   def _VerifyTestCasesDoNotInterleave(self, tests):
 244     test_cases = []
 245     for test in tests:
 246       [test_case, _] = test.split('.')
 247       if test_cases and test_cases[-1] != test_case:
 248         test_cases.append(test_case)
 249         self.assertEqual(1, test_cases.count(test_case),
 250                          'Test case %s is not grouped together in %s' %
 251                          (test_case, tests))
 252
 253   def testShuffleDoesNotInterleaveTestCases(self):
 254     self._VerifyTestCasesDoNotInterleave(SHUFFLED_ALL_TESTS)
 255     self._VerifyTestCasesDoNotInterleave(SHUFFLED_ACTIVE_TESTS)
 256     self._VerifyTestCasesDoNotInterleave(SHUFFLED_FILTERED_TESTS)
 257     self._VerifyTestCasesDoNotInterleave(SHUFFLED_SHARDED_TESTS)
 258
 259   def testShuffleRestoresOrderAfterEachIteration(self):
 260     # Get the test lists in all 3 iterations, using random seed 1, 2,
 261     # and 3 respectively.  Google Test picks a different seed in each
 262     # iteration, and this test depends on the current implementation
 263     # picking successive numbers.  This dependency is not ideal, but
 264     # makes the test much easier to write.
 265     [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
 266         GetTestsForAllIterations(
 267             {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
 268
 269     # Make sure running the tests with random seed 1 gets the same
 270     # order as in iteration 1 above.
 271     [tests_with_seed1] = GetTestsForAllIterations(
 272         {}, [ShuffleFlag(), RandomSeedFlag(1)])
 273     self.assertEqual(tests_in_iteration1, tests_with_seed1)
 274
 275     # Make sure running the tests with random seed 2 gets the same
 276     # order as in iteration 2 above.  Success means that Google Test
 277     # correctly restores the test order before re-shuffling at the
 278     # beginning of iteration 2.
 279     [tests_with_seed2] = GetTestsForAllIterations(
 280         {}, [ShuffleFlag(), RandomSeedFlag(2)])
 281     self.assertEqual(tests_in_iteration2, tests_with_seed2)
 282
 283     # Make sure running the tests with random seed 3 gets the same
 284     # order as in iteration 3 above.  Success means that Google Test
 285     # correctly restores the test order before re-shuffling at the
 286     # beginning of iteration 3.
 287     [tests_with_seed3] = GetTestsForAllIterations(
 288         {}, [ShuffleFlag(), RandomSeedFlag(3)])
 289     self.assertEqual(tests_in_iteration3, tests_with_seed3)
 290
 291   def testShuffleGeneratesNewOrderInEachIteration(self):
 292     [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
 293         GetTestsForAllIterations(
 294             {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
 295
 296     self.assert_(tests_in_iteration1 != tests_in_iteration2,
 297                  tests_in_iteration1)
 298     self.assert_(tests_in_iteration1 != tests_in_iteration3,
 299                  tests_in_iteration1)
 300     self.assert_(tests_in_iteration2 != tests_in_iteration3,
 301                  tests_in_iteration2)
 302
 303   def testShuffleShardedTestsPreservesPartition(self):
 304     # If we run M tests on N shards, the same M tests should be run in
 305     # total, regardless of the random seeds used by the shards.
 306     [tests1] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
 307                                          SHARD_INDEX_ENV_VAR: '0'},
 308                                         [ShuffleFlag(), RandomSeedFlag(1)])
 309     [tests2] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
 310                                          SHARD_INDEX_ENV_VAR: '1'},
 311                                         [ShuffleFlag(), RandomSeedFlag(20)])
 312     [tests3] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
 313                                          SHARD_INDEX_ENV_VAR: '2'},
 314                                         [ShuffleFlag(), RandomSeedFlag(25)])
 315     sorted_sharded_tests = tests1 + tests2 + tests3
 316     sorted_sharded_tests.sort()
 317     sorted_active_tests = []
 318     sorted_active_tests.extend(ACTIVE_TESTS)
 319     sorted_active_tests.sort()
 320     self.assertEqual(sorted_active_tests, sorted_sharded_tests)
 321
 322 if __name__ == '__main__':
 323   gtest_test_utils.Main()