summaryrefslogtreecommitdiffstats
path: root/Lib/unittest/test/test_runner.py
blob: 9cbc26041ff5ec8df8bce53d0a1d9233702ca8c3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
import io
import os
import sys
import pickle
import subprocess

import unittest
from unittest.case import _Outcome

from unittest.test.support import (LoggingResult,
                                   ResultWithNoStartTestRunStopTestRun)


class TestCleanUp(unittest.TestCase):

    def testCleanUp(self):
        class TestableTest(unittest.TestCase):
            def testNothing(self):
                pass

        test = TestableTest('testNothing')
        self.assertEqual(test._cleanups, [])

        cleanups = []

        def cleanup1(*args, **kwargs):
            cleanups.append((1, args, kwargs))

        def cleanup2(*args, **kwargs):
            cleanups.append((2, args, kwargs))

        test.addCleanup(cleanup1, 1, 2, 3, four='hello', five='goodbye')
        test.addCleanup(cleanup2)

        self.assertEqual(test._cleanups,
                         [(cleanup1, (1, 2, 3), dict(four='hello', five='goodbye')),
                          (cleanup2, (), {})])

        self.assertTrue(test.doCleanups())
        self.assertEqual(cleanups, [(2, (), {}), (1, (1, 2, 3), dict(four='hello', five='goodbye'))])

    def testCleanUpWithErrors(self):
        class TestableTest(unittest.TestCase):
            def testNothing(self):
                pass

        test = TestableTest('testNothing')
        outcome = test._outcome = _Outcome()

        exc1 = Exception('foo')
        exc2 = Exception('bar')
        def cleanup1():
            raise exc1

        def cleanup2():
            raise exc2

        test.addCleanup(cleanup1)
        test.addCleanup(cleanup2)

        self.assertFalse(test.doCleanups())
        self.assertFalse(outcome.success)

        ((_, (Type1, instance1, _)),
         (_, (Type2, instance2, _))) = reversed(outcome.errors)
        self.assertEqual((Type1, instance1), (Exception, exc1))
        self.assertEqual((Type2, instance2), (Exception, exc2))

    def testCleanupInRun(self):
        blowUp = False
        ordering = []

        class TestableTest(unittest.TestCase):
            def setUp(self):
                ordering.append('setUp')
                if blowUp:
                    raise Exception('foo')

            def testNothing(self):
                ordering.append('test')

            def tearDown(self):
                ordering.append('tearDown')

        test = TestableTest('testNothing')

        def cleanup1():
            ordering.append('cleanup1')
        def cleanup2():
            ordering.append('cleanup2')
        test.addCleanup(cleanup1)
        test.addCleanup(cleanup2)

        def success(some_test):
            self.assertEqual(some_test, test)
            ordering.append('success')

        result = unittest.TestResult()
        result.addSuccess = success

        test.run(result)
        self.assertEqual(ordering, ['setUp', 'test', 'tearDown',
                                    'cleanup2', 'cleanup1', 'success'])

        blowUp = True
        ordering = []
        test = TestableTest('testNothing')
        test.addCleanup(cleanup1)
        test.run(result)
        self.assertEqual(ordering, ['setUp', 'cleanup1'])

    def testTestCaseDebugExecutesCleanups(self):
        ordering = []

        class TestableTest(unittest.TestCase):
            def setUp(self):
                ordering.append('setUp')
                self.addCleanup(cleanup1)

            def testNothing(self):
                ordering.append('test')

            def tearDown(self):
                ordering.append('tearDown')

        test = TestableTest('testNothing')

        def cleanup1():
            ordering.append('cleanup1')
            test.addCleanup(cleanup2)
        def cleanup2():
            ordering.append('cleanup2')

        test.debug()
        self.assertEqual(ordering, ['setUp', 'test', 'tearDown', 'cleanup1', 'cleanup2'])


class Test_TextTestRunner(unittest.TestCase):
    """Tests for TextTestRunner."""

    def setUp(self):
        # clean the environment from pre-existing PYTHONWARNINGS to make
        # test_warnings results consistent
        self.pythonwarnings = os.environ.get('PYTHONWARNINGS')
        if self.pythonwarnings:
            del os.environ['PYTHONWARNINGS']

    def tearDown(self):
        # bring back pre-existing PYTHONWARNINGS if present
        if self.pythonwarnings:
            os.environ['PYTHONWARNINGS'] = self.pythonwarnings

    def test_init(self):
        runner = unittest.TextTestRunner()
        self.assertFalse(runner.failfast)
        self.assertFalse(runner.buffer)
        self.assertEqual(runner.verbosity, 1)
        self.assertEqual(runner.warnings, None)
        self.assertTrue(runner.descriptions)
        self.assertEqual(runner.resultclass, unittest.TextTestResult)
        self.assertFalse(runner.tb_locals)

    def test_multiple_inheritance(self):
        class AResult(unittest.TestResult):
            def __init__(self, stream, descriptions, verbosity):
                super(AResult, self).__init__(stream, descriptions, verbosity)

        class ATextResult(unittest.TextTestResult, AResult):
            pass

        # This used to raise an exception due to TextTestResult not passing
        # on arguments in its __init__ super call
        ATextResult(None, None, 1)

    def testBufferAndFailfast(self):
        class Test(unittest.TestCase):
            def testFoo(self):
                pass
        result = unittest.TestResult()
        runner = unittest.TextTestRunner(stream=io.StringIO(), failfast=True,
                                         buffer=True)
        # Use our result object
        runner._makeResult = lambda: result
        runner.run(Test('testFoo'))

        self.assertTrue(result.failfast)
        self.assertTrue(result.buffer)

    def test_locals(self):
        runner = unittest.TextTestRunner(stream=io.StringIO(), tb_locals=True)
        result = runner.run(unittest.TestSuite())
        self.assertEqual(True, result.tb_locals)

    def testRunnerRegistersResult(self):
        class Test(unittest.TestCase):
            def testFoo(self):
                pass
        originalRegisterResult = unittest.runner.registerResult
        def cleanup():
            unittest.runner.registerResult = originalRegisterResult
        self.addCleanup(cleanup)

        result = unittest.TestResult()
        runner = unittest.TextTestRunner(stream=io.StringIO())
        # Use our result object
        runner._makeResult = lambda: result

        self.wasRegistered = 0
        def fakeRegisterResult(thisResult):
            self.wasRegistered += 1
            self.assertEqual(thisResult, result)
        unittest.runner.registerResult = fakeRegisterResult

        runner.run(unittest.TestSuite())
        self.assertEqual(self.wasRegistered, 1)

    def test_works_with_result_without_startTestRun_stopTestRun(self):
        class OldTextResult(ResultWithNoStartTestRunStopTestRun):
            separator2 = ''
            def printErrors(self):
                pass

        class Runner(unittest.TextTestRunner):
            def __init__(self):
                super(Runner, self).__init__(io.StringIO())

            def _makeResult(self):
                return OldTextResult()

        runner = Runner()
        runner.run(unittest.TestSuite())

    def test_startTestRun_stopTestRun_called(self):
        class LoggingTextResult(LoggingResult):
            separator2 = ''
            def printErrors(self):
                pass

        class LoggingRunner(unittest.TextTestRunner):
            def __init__(self, events):
                super(LoggingRunner, self).__init__(io.StringIO())
                self._events = events

            def _makeResult(self):
                return LoggingTextResult(self._events)

        events = []
        runner = LoggingRunner(events)
        runner.run(unittest.TestSuite())
        expected = ['startTestRun', 'stopTestRun']
        self.assertEqual(events, expected)

    def test_pickle_unpickle(self):
        # Issue #7197: a TextTestRunner should be (un)pickleable. This is
        # required by test_multiprocessing under Windows (in verbose mode).
        stream = io.StringIO("foo")
        runner = unittest.TextTestRunner(stream)
        for protocol in range(2, pickle.HIGHEST_PROTOCOL + 1):
            s = pickle.dumps(runner, protocol)
            obj = pickle.loads(s)
            # StringIO objects never compare equal, a cheap test instead.
            self.assertEqual(obj.stream.getvalue(), stream.getvalue())

    def test_resultclass(self):
        def MockResultClass(*args):
            return args
        STREAM = object()
        DESCRIPTIONS = object()
        VERBOSITY = object()
        runner = unittest.TextTestRunner(STREAM, DESCRIPTIONS, VERBOSITY,
                                         resultclass=MockResultClass)
        self.assertEqual(runner.resultclass, MockResultClass)

        expectedresult = (runner.stream, DESCRIPTIONS, VERBOSITY)
        self.assertEqual(runner._makeResult(), expectedresult)

    def test_warnings(self):
        """
        Check that warnings argument of TextTestRunner correctly affects the
        behavior of the warnings.
        """
        # see #10535 and the _test_warnings file for more information

        def get_parse_out_err(p):
            return [b.splitlines() for b in p.communicate()]
        opts = dict(stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                    cwd=os.path.dirname(__file__))
        ae_msg = b'Please use assertEqual instead.'
        at_msg = b'Please use assertTrue instead.'

        # no args -> all the warnings are printed, unittest warnings only once
        p = subprocess.Popen([sys.executable, '_test_warnings.py'], **opts)
        out, err = get_parse_out_err(p)
        self.assertIn(b'OK', err)
        # check that the total number of warnings in the output is correct
        self.assertEqual(len(out), 12)
        # check that the numbers of the different kind of warnings is correct
        for msg in [b'dw', b'iw', b'uw']:
            self.assertEqual(out.count(msg), 3)
        for msg in [ae_msg, at_msg, b'rw']:
            self.assertEqual(out.count(msg), 1)

        args_list = (
            # passing 'ignore' as warnings arg -> no warnings
            [sys.executable, '_test_warnings.py', 'ignore'],
            # -W doesn't affect the result if the arg is passed
            [sys.executable, '-Wa', '_test_warnings.py', 'ignore'],
            # -W affects the result if the arg is not passed
            [sys.executable, '-Wi', '_test_warnings.py']
        )
        # in all these cases no warnings are printed
        for args in args_list:
            p = subprocess.Popen(args, **opts)
            out, err = get_parse_out_err(p)
            self.assertIn(b'OK', err)
            self.assertEqual(len(out), 0)


        # passing 'always' as warnings arg -> all the warnings printed,
        #                                     unittest warnings only once
        p = subprocess.Popen([sys.executable, '_test_warnings.py', 'always'],
                             **opts)
        out, err = get_parse_out_err(p)
        self.assertIn(b'OK', err)
        self.assertEqual(len(out), 14)
        for msg in [b'dw', b'iw', b'uw', b'rw']:
            self.assertEqual(out.count(msg), 3)
        for msg in [ae_msg, at_msg]:
            self.assertEqual(out.count(msg), 1)

    def testStdErrLookedUpAtInstantiationTime(self):
        # see issue 10786
        old_stderr = sys.stderr
        f = io.StringIO()
        sys.stderr = f
        try:
            runner = unittest.TextTestRunner()
            self.assertTrue(runner.stream.stream is f)
        finally:
            sys.stderr = old_stderr

    def testSpecifiedStreamUsed(self):
        # see issue 10786
        f = io.StringIO()
        runner = unittest.TextTestRunner(f)
        self.assertTrue(runner.stream.stream is f)


if __name__ == "__main__":
    unittest.main()