[3] | 1 | """ |
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| 2 | Test Suites |
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| 3 | ----------- |
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| 4 | |
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| 5 | Provides a LazySuite, which is a suite whose test list is a generator |
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| 6 | function, and ContextSuite,which can run fixtures (setup/teardown |
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| 7 | functions or methods) for the context that contains its tests. |
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| 8 | |
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| 9 | """ |
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| 10 | from __future__ import generators |
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| 11 | |
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| 12 | import logging |
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| 13 | import sys |
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| 14 | import unittest |
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| 15 | from nose.case import Test |
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| 16 | from nose.config import Config |
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| 17 | from nose.proxy import ResultProxyFactory |
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| 18 | from nose.util import isclass, resolve_name, try_run |
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| 19 | |
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| 20 | if sys.platform == 'cli': |
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| 21 | import clr |
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| 22 | clr.AddReference("IronPython") |
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| 23 | from IronPython.Runtime.Exceptions import StringException |
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| 24 | |
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| 25 | log = logging.getLogger(__name__) |
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| 26 | #log.setLevel(logging.DEBUG) |
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| 27 | |
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| 28 | # Singleton for default value -- see ContextSuite.__init__ below |
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| 29 | _def = object() |
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| 30 | |
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| 31 | |
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| 32 | class MixedContextError(Exception): |
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| 33 | """Error raised when a context suite sees tests from more than |
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| 34 | one context. |
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| 35 | """ |
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| 36 | pass |
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| 37 | |
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| 38 | |
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| 39 | class LazySuite(unittest.TestSuite): |
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| 40 | """A suite that may use a generator as its list of tests |
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| 41 | """ |
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| 42 | def __init__(self, tests=()): |
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| 43 | """Initialize the suite. tests may be an iterable or a generator |
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| 44 | """ |
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| 45 | self._set_tests(tests) |
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| 46 | |
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| 47 | def __iter__(self): |
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| 48 | return iter(self._tests) |
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| 49 | |
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| 50 | def __repr__(self): |
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| 51 | return "<%s tests=generator (%s)>" % ( |
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| 52 | unittest._strclass(self.__class__), id(self)) |
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| 53 | |
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| 54 | def __hash__(self): |
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| 55 | return object.__hash__(self) |
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| 56 | |
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| 57 | __str__ = __repr__ |
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| 58 | |
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| 59 | def addTest(self, test): |
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| 60 | self._precache.append(test) |
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| 61 | |
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| 62 | def __nonzero__(self): |
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| 63 | log.debug("tests in %s?", id(self)) |
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| 64 | if self._precache: |
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| 65 | return True |
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| 66 | if self.test_generator is None: |
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| 67 | return False |
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| 68 | try: |
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| 69 | test = self.test_generator.next() |
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| 70 | if test is not None: |
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| 71 | self._precache.append(test) |
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| 72 | return True |
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| 73 | except StopIteration: |
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| 74 | pass |
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| 75 | return False |
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| 76 | |
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| 77 | def _get_tests(self): |
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| 78 | log.debug("precache is %s", self._precache) |
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| 79 | for test in self._precache: |
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| 80 | yield test |
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| 81 | if self.test_generator is None: |
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| 82 | return |
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| 83 | for test in self.test_generator: |
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| 84 | yield test |
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| 85 | |
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| 86 | def _set_tests(self, tests): |
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| 87 | self._precache = [] |
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| 88 | is_suite = isinstance(tests, unittest.TestSuite) |
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| 89 | if callable(tests) and not is_suite: |
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| 90 | self.test_generator = tests() |
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| 91 | elif is_suite: |
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| 92 | # Suites need special treatment: they must be called like |
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| 93 | # tests for their setup/teardown to run (if any) |
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| 94 | self.addTests([tests]) |
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| 95 | self.test_generator = None |
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| 96 | else: |
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| 97 | self.addTests(tests) |
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| 98 | self.test_generator = None |
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| 99 | |
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| 100 | _tests = property(_get_tests, _set_tests, None, |
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| 101 | "Access the tests in this suite. Access is through a " |
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| 102 | "generator, so iteration may not be repeatable.") |
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| 103 | |
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| 104 | |
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| 105 | class ContextSuite(LazySuite): |
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| 106 | """A suite with context. |
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| 107 | |
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| 108 | A ContextSuite executes fixtures (setup and teardown functions or |
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| 109 | methods) for the context containing its tests. |
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| 110 | |
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| 111 | The context may be explicitly passed. If it is not, a context (or |
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| 112 | nested set of contexts) will be constructed by examining the tests |
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| 113 | in the suite. |
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| 114 | """ |
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| 115 | failureException = unittest.TestCase.failureException |
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| 116 | was_setup = False |
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| 117 | was_torndown = False |
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| 118 | classSetup = ('setup_class', 'setup_all', 'setupClass', 'setupAll', |
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| 119 | 'setUpClass', 'setUpAll') |
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| 120 | classTeardown = ('teardown_class', 'teardown_all', 'teardownClass', |
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| 121 | 'teardownAll', 'tearDownClass', 'tearDownAll') |
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| 122 | moduleSetup = ('setup_module', 'setupModule', 'setUpModule', 'setup', |
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| 123 | 'setUp') |
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| 124 | moduleTeardown = ('teardown_module', 'teardownModule', 'tearDownModule', |
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| 125 | 'teardown', 'tearDown') |
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| 126 | packageSetup = ('setup_package', 'setupPackage', 'setUpPackage') |
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| 127 | packageTeardown = ('teardown_package', 'teardownPackage', |
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| 128 | 'tearDownPackage') |
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| 129 | |
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| 130 | def __init__(self, tests=(), context=None, factory=None, |
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| 131 | config=None, resultProxy=None, can_split=True): |
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| 132 | log.debug("Context suite for %s (%s) (%s)", tests, context, id(self)) |
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| 133 | self.context = context |
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| 134 | self.factory = factory |
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| 135 | if config is None: |
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| 136 | config = Config() |
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| 137 | self.config = config |
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| 138 | self.resultProxy = resultProxy |
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| 139 | self.has_run = False |
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| 140 | self.can_split = can_split |
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| 141 | LazySuite.__init__(self, tests) |
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| 142 | |
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| 143 | def __repr__(self): |
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| 144 | return "<%s context=%s>" % ( |
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| 145 | unittest._strclass(self.__class__), |
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| 146 | getattr(self.context, '__name__', self.context)) |
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| 147 | __str__ = __repr__ |
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| 148 | |
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| 149 | def __hash__(self): |
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| 150 | return object.__hash__(self) |
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| 151 | |
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| 152 | # 2.3 compat -- force 2.4 call sequence |
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| 153 | def __call__(self, *arg, **kw): |
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| 154 | return self.run(*arg, **kw) |
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| 155 | |
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| 156 | def exc_info(self): |
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| 157 | """Hook for replacing error tuple output |
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| 158 | """ |
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| 159 | return sys.exc_info() |
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| 160 | |
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| 161 | def _exc_info(self): |
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| 162 | """Bottleneck to fix up IronPython string exceptions |
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| 163 | """ |
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| 164 | e = self.exc_info() |
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| 165 | if sys.platform == 'cli': |
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| 166 | if isinstance(e[0], StringException): |
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| 167 | # IronPython throws these StringExceptions, but |
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| 168 | # traceback checks type(etype) == str. Make a real |
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| 169 | # string here. |
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| 170 | e = (str(e[0]), e[1], e[2]) |
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| 171 | |
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| 172 | return e |
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| 173 | |
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| 174 | def run(self, result): |
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| 175 | """Run tests in suite inside of suite fixtures. |
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| 176 | """ |
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| 177 | # proxy the result for myself |
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| 178 | if self.resultProxy: |
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| 179 | result, orig = self.resultProxy(result, self), result |
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| 180 | else: |
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| 181 | result, orig = result, result |
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| 182 | try: |
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| 183 | self.setUp() |
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| 184 | except KeyboardInterrupt: |
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| 185 | raise |
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| 186 | except: |
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| 187 | result.addError(self, self._exc_info()) |
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| 188 | return |
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| 189 | try: |
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| 190 | for test in self._tests: |
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| 191 | if result.shouldStop: |
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| 192 | log.debug("stopping") |
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| 193 | break |
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| 194 | # each nose.case.Test will create its own result proxy |
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| 195 | # so the cases need the original result, to avoid proxy |
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| 196 | # chains |
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| 197 | test(orig) |
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| 198 | finally: |
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| 199 | self.has_run = True |
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| 200 | try: |
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| 201 | self.tearDown() |
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| 202 | except KeyboardInterrupt: |
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| 203 | raise |
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| 204 | except: |
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| 205 | result.addError(self, self._exc_info()) |
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| 206 | |
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| 207 | def hasFixtures(self, ctx_callback=None): |
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| 208 | context = self.context |
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| 209 | if context is None: |
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| 210 | return False |
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| 211 | if self.implementsAnyFixture(context, ctx_callback=ctx_callback): |
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| 212 | return True |
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| 213 | # My context doesn't have any, but its ancestors might |
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| 214 | factory = self.factory |
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| 215 | if factory: |
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| 216 | ancestors = factory.context.get(self, []) |
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| 217 | for ancestor in ancestors: |
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| 218 | if self.implementsAnyFixture( |
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| 219 | ancestor, ctx_callback=ctx_callback): |
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| 220 | return True |
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| 221 | return False |
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| 222 | |
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| 223 | def implementsAnyFixture(self, context, ctx_callback): |
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| 224 | if isclass(context): |
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| 225 | names = self.classSetup + self.classTeardown |
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| 226 | else: |
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| 227 | names = self.moduleSetup + self.moduleTeardown |
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| 228 | if hasattr(context, '__path__'): |
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| 229 | names += self.packageSetup + self.packageTeardown |
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| 230 | # If my context has any fixture attribute, I have fixtures |
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| 231 | fixt = False |
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| 232 | for m in names: |
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| 233 | if hasattr(context, m): |
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| 234 | fixt = True |
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| 235 | break |
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| 236 | if ctx_callback is None: |
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| 237 | return fixt |
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| 238 | return ctx_callback(context, fixt) |
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| 239 | |
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| 240 | def setUp(self): |
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| 241 | log.debug("suite %s setUp called, tests: %s", id(self), self._tests) |
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| 242 | if not self: |
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| 243 | # I have no tests |
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| 244 | log.debug("suite %s has no tests", id(self)) |
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| 245 | return |
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| 246 | if self.was_setup: |
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| 247 | log.debug("suite %s already set up", id(self)) |
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| 248 | return |
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| 249 | context = self.context |
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| 250 | if context is None: |
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| 251 | return |
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| 252 | # before running my own context's setup, I need to |
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| 253 | # ask the factory if my context's contexts' setups have been run |
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| 254 | factory = self.factory |
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| 255 | if factory: |
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| 256 | # get a copy, since we'll be destroying it as we go |
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| 257 | ancestors = factory.context.get(self, [])[:] |
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| 258 | while ancestors: |
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| 259 | ancestor = ancestors.pop() |
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| 260 | log.debug("ancestor %s may need setup", ancestor) |
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| 261 | if ancestor in factory.was_setup: |
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| 262 | continue |
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| 263 | log.debug("ancestor %s does need setup", ancestor) |
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| 264 | self.setupContext(ancestor) |
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| 265 | if not context in factory.was_setup: |
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| 266 | self.setupContext(context) |
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| 267 | else: |
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| 268 | self.setupContext(context) |
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| 269 | self.was_setup = True |
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| 270 | log.debug("completed suite setup") |
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| 271 | |
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| 272 | def setupContext(self, context): |
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| 273 | self.config.plugins.startContext(context) |
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| 274 | log.debug("%s setup context %s", self, context) |
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| 275 | if self.factory: |
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| 276 | if context in self.factory.was_setup: |
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| 277 | return |
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| 278 | # note that I ran the setup for this context, so that I'll run |
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| 279 | # the teardown in my teardown |
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| 280 | self.factory.was_setup[context] = self |
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| 281 | if isclass(context): |
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| 282 | names = self.classSetup |
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| 283 | else: |
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| 284 | names = self.moduleSetup |
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| 285 | if hasattr(context, '__path__'): |
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| 286 | names = self.packageSetup + names |
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| 287 | try_run(context, names) |
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| 288 | |
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| 289 | def shortDescription(self): |
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| 290 | if self.context is None: |
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| 291 | return "test suite" |
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| 292 | return "test suite for %s" % self.context |
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| 293 | |
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| 294 | def tearDown(self): |
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| 295 | log.debug('context teardown') |
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| 296 | if not self.was_setup or self.was_torndown: |
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| 297 | log.debug( |
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| 298 | "No reason to teardown (was_setup? %s was_torndown? %s)" |
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| 299 | % (self.was_setup, self.was_torndown)) |
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| 300 | return |
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| 301 | self.was_torndown = True |
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| 302 | context = self.context |
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| 303 | if context is None: |
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| 304 | log.debug("No context to tear down") |
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| 305 | return |
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| 306 | |
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| 307 | # for each ancestor... if the ancestor was setup |
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| 308 | # and I did the setup, I can do teardown |
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| 309 | factory = self.factory |
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| 310 | if factory: |
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| 311 | ancestors = factory.context.get(self, []) + [context] |
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| 312 | for ancestor in ancestors: |
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| 313 | log.debug('ancestor %s may need teardown', ancestor) |
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| 314 | if not ancestor in factory.was_setup: |
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| 315 | log.debug('ancestor %s was not setup', ancestor) |
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| 316 | continue |
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| 317 | if ancestor in factory.was_torndown: |
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| 318 | log.debug('ancestor %s already torn down', ancestor) |
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| 319 | continue |
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| 320 | setup = factory.was_setup[ancestor] |
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| 321 | log.debug("%s setup ancestor %s", setup, ancestor) |
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| 322 | if setup is self: |
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| 323 | self.teardownContext(ancestor) |
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| 324 | else: |
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| 325 | self.teardownContext(context) |
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| 326 | |
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| 327 | def teardownContext(self, context): |
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| 328 | log.debug("%s teardown context %s", self, context) |
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| 329 | if self.factory: |
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| 330 | if context in self.factory.was_torndown: |
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| 331 | return |
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| 332 | self.factory.was_torndown[context] = self |
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| 333 | if isclass(context): |
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| 334 | names = self.classTeardown |
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| 335 | else: |
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| 336 | names = self.moduleTeardown |
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| 337 | if hasattr(context, '__path__'): |
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| 338 | names = self.packageTeardown + names |
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| 339 | try_run(context, names) |
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| 340 | self.config.plugins.stopContext(context) |
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| 341 | |
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| 342 | # FIXME the wrapping has to move to the factory? |
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| 343 | def _get_wrapped_tests(self): |
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| 344 | for test in self._get_tests(): |
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| 345 | if isinstance(test, Test) or isinstance(test, unittest.TestSuite): |
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| 346 | yield test |
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| 347 | else: |
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| 348 | yield Test(test, |
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| 349 | config=self.config, |
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| 350 | resultProxy=self.resultProxy) |
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| 351 | |
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| 352 | _tests = property(_get_wrapped_tests, LazySuite._set_tests, None, |
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| 353 | "Access the tests in this suite. Tests are returned " |
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| 354 | "inside of a context wrapper.") |
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| 355 | |
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| 356 | |
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| 357 | class ContextSuiteFactory(object): |
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| 358 | """Factory for ContextSuites. Called with a collection of tests, |
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| 359 | the factory decides on a hierarchy of contexts by introspecting |
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| 360 | the collection or the tests themselves to find the objects |
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| 361 | containing the test objects. It always returns one suite, but that |
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| 362 | suite may consist of a hierarchy of nested suites. |
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| 363 | """ |
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| 364 | suiteClass = ContextSuite |
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| 365 | def __init__(self, config=None, suiteClass=None, resultProxy=_def): |
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| 366 | if config is None: |
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| 367 | config = Config() |
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| 368 | self.config = config |
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| 369 | if suiteClass is not None: |
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| 370 | self.suiteClass = suiteClass |
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| 371 | # Using a singleton to represent default instead of None allows |
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| 372 | # passing resultProxy=None to turn proxying off. |
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| 373 | if resultProxy is _def: |
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| 374 | resultProxy = ResultProxyFactory(config=config) |
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| 375 | self.resultProxy = resultProxy |
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| 376 | self.suites = {} |
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| 377 | self.context = {} |
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| 378 | self.was_setup = {} |
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| 379 | self.was_torndown = {} |
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| 380 | |
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| 381 | def __call__(self, tests, **kw): |
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| 382 | """Return ``ContextSuite`` for tests. ``tests`` may either |
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| 383 | be a callable (in which case the resulting ContextSuite will |
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| 384 | have no parent context and be evaluated lazily) or an |
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| 385 | iterable. In that case the tests will wrapped in |
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| 386 | nose.case.Test, be examined and the context of each found and a |
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| 387 | suite of suites returned, organized into a stack with the |
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| 388 | outermost suites belonging to the outermost contexts. |
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| 389 | """ |
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| 390 | log.debug("Create suite for %s", tests) |
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| 391 | context = kw.pop('context', getattr(tests, 'context', None)) |
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| 392 | log.debug("tests %s context %s", tests, context) |
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| 393 | if context is None: |
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| 394 | tests = self.wrapTests(tests) |
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| 395 | try: |
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| 396 | context = self.findContext(tests) |
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| 397 | except MixedContextError: |
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| 398 | return self.makeSuite(self.mixedSuites(tests), None, **kw) |
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| 399 | return self.makeSuite(tests, context, **kw) |
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| 400 | |
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| 401 | def ancestry(self, context): |
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| 402 | """Return the ancestry of the context (that is, all of the |
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| 403 | packages and modules containing the context), in order of |
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| 404 | descent with the outermost ancestor last. |
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| 405 | This method is a generator. |
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| 406 | """ |
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| 407 | log.debug("get ancestry %s", context) |
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| 408 | if context is None: |
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| 409 | return |
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| 410 | # Methods include reference to module they are defined in, we |
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| 411 | # don't want that, instead want the module the class is in now |
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| 412 | # (classes are re-ancestored elsewhere). |
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| 413 | if hasattr(context, 'im_class'): |
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| 414 | context = context.im_class |
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| 415 | if hasattr(context, '__module__'): |
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| 416 | ancestors = context.__module__.split('.') |
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| 417 | elif hasattr(context, '__name__'): |
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| 418 | ancestors = context.__name__.split('.')[:-1] |
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| 419 | else: |
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| 420 | raise TypeError("%s has no ancestors?" % context) |
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| 421 | while ancestors: |
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| 422 | log.debug(" %s ancestors %s", context, ancestors) |
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| 423 | yield resolve_name('.'.join(ancestors)) |
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| 424 | ancestors.pop() |
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| 425 | |
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| 426 | def findContext(self, tests): |
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| 427 | if callable(tests) or isinstance(tests, unittest.TestSuite): |
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| 428 | return None |
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| 429 | context = None |
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| 430 | for test in tests: |
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| 431 | # Don't look at suites for contexts, only tests |
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| 432 | ctx = getattr(test, 'context', None) |
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| 433 | if ctx is None: |
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| 434 | continue |
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| 435 | if context is None: |
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| 436 | context = ctx |
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| 437 | elif context != ctx: |
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| 438 | raise MixedContextError( |
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| 439 | "Tests with different contexts in same suite! %s != %s" |
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| 440 | % (context, ctx)) |
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| 441 | return context |
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| 442 | |
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| 443 | def makeSuite(self, tests, context, **kw): |
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| 444 | suite = self.suiteClass( |
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| 445 | tests, context=context, config=self.config, factory=self, |
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| 446 | resultProxy=self.resultProxy, **kw) |
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| 447 | if context is not None: |
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| 448 | self.suites.setdefault(context, []).append(suite) |
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| 449 | self.context.setdefault(suite, []).append(context) |
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| 450 | log.debug("suite %s has context %s", suite, |
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| 451 | getattr(context, '__name__', None)) |
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| 452 | for ancestor in self.ancestry(context): |
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| 453 | self.suites.setdefault(ancestor, []).append(suite) |
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| 454 | self.context[suite].append(ancestor) |
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| 455 | log.debug("suite %s has ancestor %s", suite, ancestor.__name__) |
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| 456 | return suite |
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| 457 | |
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| 458 | def mixedSuites(self, tests): |
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| 459 | """The complex case where there are tests that don't all share |
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| 460 | the same context. Groups tests into suites with common ancestors, |
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| 461 | according to the following (essentially tail-recursive) procedure: |
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| 462 | |
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| 463 | Starting with the context of the first test, if it is not |
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| 464 | None, look for tests in the remaining tests that share that |
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| 465 | ancestor. If any are found, group into a suite with that |
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| 466 | ancestor as the context, and replace the current suite with |
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| 467 | that suite. Continue this process for each ancestor of the |
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| 468 | first test, until all ancestors have been processed. At this |
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| 469 | point if any tests remain, recurse with those tests as the |
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| 470 | input, returning a list of the common suite (which may be the |
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| 471 | suite or test we started with, if no common tests were found) |
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| 472 | plus the results of recursion. |
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| 473 | """ |
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| 474 | if not tests: |
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| 475 | return [] |
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| 476 | head = tests.pop(0) |
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| 477 | if not tests: |
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| 478 | return [head] # short circuit when none are left to combine |
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| 479 | suite = head # the common ancestry suite, so far |
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| 480 | tail = tests[:] |
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| 481 | context = getattr(head, 'context', None) |
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| 482 | if context is not None: |
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| 483 | ancestors = [context] + [a for a in self.ancestry(context)] |
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| 484 | for ancestor in ancestors: |
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| 485 | common = [suite] # tests with ancestor in common, so far |
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| 486 | remain = [] # tests that remain to be processed |
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| 487 | for test in tail: |
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| 488 | found_common = False |
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| 489 | test_ctx = getattr(test, 'context', None) |
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| 490 | if test_ctx is None: |
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| 491 | remain.append(test) |
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| 492 | continue |
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| 493 | if test_ctx is ancestor: |
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| 494 | common.append(test) |
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| 495 | continue |
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| 496 | for test_ancestor in self.ancestry(test_ctx): |
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| 497 | if test_ancestor is ancestor: |
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| 498 | common.append(test) |
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| 499 | found_common = True |
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| 500 | break |
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| 501 | if not found_common: |
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| 502 | remain.append(test) |
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| 503 | if common: |
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| 504 | suite = self.makeSuite(common, ancestor) |
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| 505 | tail = remain |
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| 506 | return [suite] + self.mixedSuites(tail) |
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| 507 | |
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| 508 | def wrapTests(self, tests): |
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| 509 | log.debug("wrap %s", tests) |
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| 510 | if callable(tests) or isinstance(tests, unittest.TestSuite): |
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| 511 | log.debug("I won't wrap") |
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| 512 | return tests |
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| 513 | wrapped = [] |
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| 514 | for test in tests: |
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| 515 | log.debug("wrapping %s", test) |
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| 516 | if isinstance(test, Test) or isinstance(test, unittest.TestSuite): |
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| 517 | wrapped.append(test) |
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| 518 | elif isinstance(test, ContextList): |
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| 519 | wrapped.append(self.makeSuite(test, context=test.context)) |
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| 520 | else: |
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| 521 | wrapped.append( |
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| 522 | Test(test, config=self.config, resultProxy=self.resultProxy) |
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| 523 | ) |
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| 524 | return wrapped |
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| 525 | |
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| 526 | |
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| 527 | class ContextList(object): |
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| 528 | """Not quite a suite -- a group of tests in a context. This is used |
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| 529 | to hint the ContextSuiteFactory about what context the tests |
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| 530 | belong to, in cases where it may be ambiguous or missing. |
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| 531 | """ |
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| 532 | def __init__(self, tests, context=None): |
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| 533 | self.tests = tests |
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| 534 | self.context = context |
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| 535 | |
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| 536 | def __iter__(self): |
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| 537 | return iter(self.tests) |
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| 538 | |
---|
| 539 | |
---|
| 540 | class FinalizingSuiteWrapper(unittest.TestSuite): |
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| 541 | """Wraps suite and calls final function after suite has |
---|
| 542 | executed. Used to call final functions in cases (like running in |
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| 543 | the standard test runner) where test running is not under nose's |
---|
| 544 | control. |
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| 545 | """ |
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| 546 | def __init__(self, suite, finalize): |
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| 547 | self.suite = suite |
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| 548 | self.finalize = finalize |
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| 549 | |
---|
| 550 | def __call__(self, *arg, **kw): |
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| 551 | return self.run(*arg, **kw) |
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| 552 | |
---|
| 553 | def run(self, *arg, **kw): |
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| 554 | try: |
---|
| 555 | return self.suite(*arg, **kw) |
---|
| 556 | finally: |
---|
| 557 | self.finalize(*arg, **kw) |
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| 558 | |
---|
| 559 | |
---|
| 560 | # backwards compat -- sort of |
---|
| 561 | class TestDir: |
---|
| 562 | def __init__(*arg, **kw): |
---|
| 563 | raise NotImplementedError( |
---|
| 564 | "TestDir is not usable with nose 0.10. The class is present " |
---|
| 565 | "in nose.suite for backwards compatibility purposes but it " |
---|
| 566 | "may not be used.") |
---|
| 567 | |
---|
| 568 | |
---|
| 569 | class TestModule: |
---|
| 570 | def __init__(*arg, **kw): |
---|
| 571 | raise NotImplementedError( |
---|
| 572 | "TestModule is not usable with nose 0.10. The class is present " |
---|
| 573 | "in nose.suite for backwards compatibility purposes but it " |
---|
| 574 | "may not be used.") |
---|