| 4710c53d |
1 | import gc\r |
| 2 | import os\r |
| 3 | import sys\r |
| 4 | import signal\r |
| 5 | import weakref\r |
| 6 | \r |
| 7 | from cStringIO import StringIO\r |
| 8 | \r |
| 9 | \r |
| 10 | import unittest\r |
| 11 | \r |
| 12 | \r |
| 13 | @unittest.skipUnless(hasattr(os, 'kill'), "Test requires os.kill")\r |
| 14 | @unittest.skipIf(sys.platform =="win32", "Test cannot run on Windows")\r |
| 15 | @unittest.skipIf(sys.platform == 'freebsd6', "Test kills regrtest on freebsd6 "\r |
| 16 | "if threads have been used")\r |
| 17 | class TestBreak(unittest.TestCase):\r |
| 18 | \r |
| 19 | def setUp(self):\r |
| 20 | self._default_handler = signal.getsignal(signal.SIGINT)\r |
| 21 | \r |
| 22 | def tearDown(self):\r |
| 23 | signal.signal(signal.SIGINT, self._default_handler)\r |
| 24 | unittest.signals._results = weakref.WeakKeyDictionary()\r |
| 25 | unittest.signals._interrupt_handler = None\r |
| 26 | \r |
| 27 | \r |
| 28 | def testInstallHandler(self):\r |
| 29 | default_handler = signal.getsignal(signal.SIGINT)\r |
| 30 | unittest.installHandler()\r |
| 31 | self.assertNotEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 32 | \r |
| 33 | try:\r |
| 34 | pid = os.getpid()\r |
| 35 | os.kill(pid, signal.SIGINT)\r |
| 36 | except KeyboardInterrupt:\r |
| 37 | self.fail("KeyboardInterrupt not handled")\r |
| 38 | \r |
| 39 | self.assertTrue(unittest.signals._interrupt_handler.called)\r |
| 40 | \r |
| 41 | def testRegisterResult(self):\r |
| 42 | result = unittest.TestResult()\r |
| 43 | unittest.registerResult(result)\r |
| 44 | \r |
| 45 | for ref in unittest.signals._results:\r |
| 46 | if ref is result:\r |
| 47 | break\r |
| 48 | elif ref is not result:\r |
| 49 | self.fail("odd object in result set")\r |
| 50 | else:\r |
| 51 | self.fail("result not found")\r |
| 52 | \r |
| 53 | \r |
| 54 | def testInterruptCaught(self):\r |
| 55 | default_handler = signal.getsignal(signal.SIGINT)\r |
| 56 | \r |
| 57 | result = unittest.TestResult()\r |
| 58 | unittest.installHandler()\r |
| 59 | unittest.registerResult(result)\r |
| 60 | \r |
| 61 | self.assertNotEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 62 | \r |
| 63 | def test(result):\r |
| 64 | pid = os.getpid()\r |
| 65 | os.kill(pid, signal.SIGINT)\r |
| 66 | result.breakCaught = True\r |
| 67 | self.assertTrue(result.shouldStop)\r |
| 68 | \r |
| 69 | try:\r |
| 70 | test(result)\r |
| 71 | except KeyboardInterrupt:\r |
| 72 | self.fail("KeyboardInterrupt not handled")\r |
| 73 | self.assertTrue(result.breakCaught)\r |
| 74 | \r |
| 75 | \r |
| 76 | def testSecondInterrupt(self):\r |
| 77 | result = unittest.TestResult()\r |
| 78 | unittest.installHandler()\r |
| 79 | unittest.registerResult(result)\r |
| 80 | \r |
| 81 | def test(result):\r |
| 82 | pid = os.getpid()\r |
| 83 | os.kill(pid, signal.SIGINT)\r |
| 84 | result.breakCaught = True\r |
| 85 | self.assertTrue(result.shouldStop)\r |
| 86 | os.kill(pid, signal.SIGINT)\r |
| 87 | self.fail("Second KeyboardInterrupt not raised")\r |
| 88 | \r |
| 89 | try:\r |
| 90 | test(result)\r |
| 91 | except KeyboardInterrupt:\r |
| 92 | pass\r |
| 93 | else:\r |
| 94 | self.fail("Second KeyboardInterrupt not raised")\r |
| 95 | self.assertTrue(result.breakCaught)\r |
| 96 | \r |
| 97 | \r |
| 98 | def testTwoResults(self):\r |
| 99 | unittest.installHandler()\r |
| 100 | \r |
| 101 | result = unittest.TestResult()\r |
| 102 | unittest.registerResult(result)\r |
| 103 | new_handler = signal.getsignal(signal.SIGINT)\r |
| 104 | \r |
| 105 | result2 = unittest.TestResult()\r |
| 106 | unittest.registerResult(result2)\r |
| 107 | self.assertEqual(signal.getsignal(signal.SIGINT), new_handler)\r |
| 108 | \r |
| 109 | result3 = unittest.TestResult()\r |
| 110 | \r |
| 111 | def test(result):\r |
| 112 | pid = os.getpid()\r |
| 113 | os.kill(pid, signal.SIGINT)\r |
| 114 | \r |
| 115 | try:\r |
| 116 | test(result)\r |
| 117 | except KeyboardInterrupt:\r |
| 118 | self.fail("KeyboardInterrupt not handled")\r |
| 119 | \r |
| 120 | self.assertTrue(result.shouldStop)\r |
| 121 | self.assertTrue(result2.shouldStop)\r |
| 122 | self.assertFalse(result3.shouldStop)\r |
| 123 | \r |
| 124 | \r |
| 125 | def testHandlerReplacedButCalled(self):\r |
| 126 | # If our handler has been replaced (is no longer installed) but is\r |
| 127 | # called by the *new* handler, then it isn't safe to delay the\r |
| 128 | # SIGINT and we should immediately delegate to the default handler\r |
| 129 | unittest.installHandler()\r |
| 130 | \r |
| 131 | handler = signal.getsignal(signal.SIGINT)\r |
| 132 | def new_handler(frame, signum):\r |
| 133 | handler(frame, signum)\r |
| 134 | signal.signal(signal.SIGINT, new_handler)\r |
| 135 | \r |
| 136 | try:\r |
| 137 | pid = os.getpid()\r |
| 138 | os.kill(pid, signal.SIGINT)\r |
| 139 | except KeyboardInterrupt:\r |
| 140 | pass\r |
| 141 | else:\r |
| 142 | self.fail("replaced but delegated handler doesn't raise interrupt")\r |
| 143 | \r |
| 144 | def testRunner(self):\r |
| 145 | # Creating a TextTestRunner with the appropriate argument should\r |
| 146 | # register the TextTestResult it creates\r |
| 147 | runner = unittest.TextTestRunner(stream=StringIO())\r |
| 148 | \r |
| 149 | result = runner.run(unittest.TestSuite())\r |
| 150 | self.assertIn(result, unittest.signals._results)\r |
| 151 | \r |
| 152 | def testWeakReferences(self):\r |
| 153 | # Calling registerResult on a result should not keep it alive\r |
| 154 | result = unittest.TestResult()\r |
| 155 | unittest.registerResult(result)\r |
| 156 | \r |
| 157 | ref = weakref.ref(result)\r |
| 158 | del result\r |
| 159 | \r |
| 160 | # For non-reference counting implementations\r |
| 161 | gc.collect();gc.collect()\r |
| 162 | self.assertIsNone(ref())\r |
| 163 | \r |
| 164 | \r |
| 165 | def testRemoveResult(self):\r |
| 166 | result = unittest.TestResult()\r |
| 167 | unittest.registerResult(result)\r |
| 168 | \r |
| 169 | unittest.installHandler()\r |
| 170 | self.assertTrue(unittest.removeResult(result))\r |
| 171 | \r |
| 172 | # Should this raise an error instead?\r |
| 173 | self.assertFalse(unittest.removeResult(unittest.TestResult()))\r |
| 174 | \r |
| 175 | try:\r |
| 176 | pid = os.getpid()\r |
| 177 | os.kill(pid, signal.SIGINT)\r |
| 178 | except KeyboardInterrupt:\r |
| 179 | pass\r |
| 180 | \r |
| 181 | self.assertFalse(result.shouldStop)\r |
| 182 | \r |
| 183 | def testMainInstallsHandler(self):\r |
| 184 | failfast = object()\r |
| 185 | test = object()\r |
| 186 | verbosity = object()\r |
| 187 | result = object()\r |
| 188 | default_handler = signal.getsignal(signal.SIGINT)\r |
| 189 | \r |
| 190 | class FakeRunner(object):\r |
| 191 | initArgs = []\r |
| 192 | runArgs = []\r |
| 193 | def __init__(self, *args, **kwargs):\r |
| 194 | self.initArgs.append((args, kwargs))\r |
| 195 | def run(self, test):\r |
| 196 | self.runArgs.append(test)\r |
| 197 | return result\r |
| 198 | \r |
| 199 | class Program(unittest.TestProgram):\r |
| 200 | def __init__(self, catchbreak):\r |
| 201 | self.exit = False\r |
| 202 | self.verbosity = verbosity\r |
| 203 | self.failfast = failfast\r |
| 204 | self.catchbreak = catchbreak\r |
| 205 | self.testRunner = FakeRunner\r |
| 206 | self.test = test\r |
| 207 | self.result = None\r |
| 208 | \r |
| 209 | p = Program(False)\r |
| 210 | p.runTests()\r |
| 211 | \r |
| 212 | self.assertEqual(FakeRunner.initArgs, [((), {'buffer': None,\r |
| 213 | 'verbosity': verbosity,\r |
| 214 | 'failfast': failfast})])\r |
| 215 | self.assertEqual(FakeRunner.runArgs, [test])\r |
| 216 | self.assertEqual(p.result, result)\r |
| 217 | \r |
| 218 | self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 219 | \r |
| 220 | FakeRunner.initArgs = []\r |
| 221 | FakeRunner.runArgs = []\r |
| 222 | p = Program(True)\r |
| 223 | p.runTests()\r |
| 224 | \r |
| 225 | self.assertEqual(FakeRunner.initArgs, [((), {'buffer': None,\r |
| 226 | 'verbosity': verbosity,\r |
| 227 | 'failfast': failfast})])\r |
| 228 | self.assertEqual(FakeRunner.runArgs, [test])\r |
| 229 | self.assertEqual(p.result, result)\r |
| 230 | \r |
| 231 | self.assertNotEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 232 | \r |
| 233 | def testRemoveHandler(self):\r |
| 234 | default_handler = signal.getsignal(signal.SIGINT)\r |
| 235 | unittest.installHandler()\r |
| 236 | unittest.removeHandler()\r |
| 237 | self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 238 | \r |
| 239 | # check that calling removeHandler multiple times has no ill-effect\r |
| 240 | unittest.removeHandler()\r |
| 241 | self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 242 | \r |
| 243 | def testRemoveHandlerAsDecorator(self):\r |
| 244 | default_handler = signal.getsignal(signal.SIGINT)\r |
| 245 | unittest.installHandler()\r |
| 246 | \r |
| 247 | @unittest.removeHandler\r |
| 248 | def test():\r |
| 249 | self.assertEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
| 250 | \r |
| 251 | test()\r |
| 252 | self.assertNotEqual(signal.getsignal(signal.SIGINT), default_handler)\r |
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