670 lines
23 KiB
Python
670 lines
23 KiB
Python
import ctypes
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import itertools
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import logging
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import multiprocessing
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import os
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import pickle
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import textwrap
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import unittest
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import warnings
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from importlib import import_module
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from django.db import connections
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from django.test import SimpleTestCase, TestCase
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from django.test.utils import (
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setup_databases as _setup_databases, setup_test_environment,
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teardown_databases as _teardown_databases, teardown_test_environment,
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)
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from django.utils.datastructures import OrderedSet
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from django.utils.deprecation import RemovedInDjango21Warning
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from django.utils.six import StringIO
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try:
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import tblib.pickling_support
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except ImportError:
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tblib = None
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class DebugSQLTextTestResult(unittest.TextTestResult):
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def __init__(self, stream, descriptions, verbosity):
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self.logger = logging.getLogger('django.db.backends')
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self.logger.setLevel(logging.DEBUG)
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super(DebugSQLTextTestResult, self).__init__(stream, descriptions, verbosity)
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def startTest(self, test):
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self.debug_sql_stream = StringIO()
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self.handler = logging.StreamHandler(self.debug_sql_stream)
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self.logger.addHandler(self.handler)
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super(DebugSQLTextTestResult, self).startTest(test)
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def stopTest(self, test):
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super(DebugSQLTextTestResult, self).stopTest(test)
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self.logger.removeHandler(self.handler)
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if self.showAll:
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self.debug_sql_stream.seek(0)
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self.stream.write(self.debug_sql_stream.read())
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self.stream.writeln(self.separator2)
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def addError(self, test, err):
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super(DebugSQLTextTestResult, self).addError(test, err)
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self.debug_sql_stream.seek(0)
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self.errors[-1] = self.errors[-1] + (self.debug_sql_stream.read(),)
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def addFailure(self, test, err):
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super(DebugSQLTextTestResult, self).addFailure(test, err)
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self.debug_sql_stream.seek(0)
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self.failures[-1] = self.failures[-1] + (self.debug_sql_stream.read(),)
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def printErrorList(self, flavour, errors):
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for test, err, sql_debug in errors:
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self.stream.writeln(self.separator1)
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self.stream.writeln("%s: %s" % (flavour, self.getDescription(test)))
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self.stream.writeln(self.separator2)
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self.stream.writeln("%s" % err)
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self.stream.writeln(self.separator2)
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self.stream.writeln("%s" % sql_debug)
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class RemoteTestResult(object):
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"""
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Record information about which tests have succeeded and which have failed.
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The sole purpose of this class is to record events in the child processes
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so they can be replayed in the master process. As a consequence it doesn't
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inherit unittest.TestResult and doesn't attempt to implement all its API.
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The implementation matches the unpythonic coding style of unittest2.
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"""
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def __init__(self):
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self.events = []
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self.failfast = False
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self.shouldStop = False
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self.testsRun = 0
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@property
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def test_index(self):
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return self.testsRun - 1
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def check_picklable(self, test, err):
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# Ensure that sys.exc_info() tuples are picklable. This displays a
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# clear multiprocessing.pool.RemoteTraceback generated in the child
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# process instead of a multiprocessing.pool.MaybeEncodingError, making
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# the root cause easier to figure out for users who aren't familiar
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# with the multiprocessing module. Since we're in a forked process,
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# our best chance to communicate with them is to print to stdout.
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try:
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pickle.dumps(err)
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except Exception as exc:
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original_exc_txt = repr(err[1])
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original_exc_txt = textwrap.fill(original_exc_txt, 75, initial_indent=' ', subsequent_indent=' ')
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pickle_exc_txt = repr(exc)
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pickle_exc_txt = textwrap.fill(pickle_exc_txt, 75, initial_indent=' ', subsequent_indent=' ')
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if tblib is None:
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print("""
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{} failed:
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{}
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Unfortunately, tracebacks cannot be pickled, making it impossible for the
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parallel test runner to handle this exception cleanly.
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In order to see the traceback, you should install tblib:
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pip install tblib
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""".format(test, original_exc_txt))
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else:
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print("""
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{} failed:
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{}
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Unfortunately, the exception it raised cannot be pickled, making it impossible
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for the parallel test runner to handle it cleanly.
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Here's the error encountered while trying to pickle the exception:
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{}
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You should re-run this test with the --parallel=1 option to reproduce the
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failure and get a correct traceback.
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""".format(test, original_exc_txt, pickle_exc_txt))
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raise
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def stop_if_failfast(self):
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if self.failfast:
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self.stop()
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def stop(self):
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self.shouldStop = True
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def startTestRun(self):
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self.events.append(('startTestRun',))
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def stopTestRun(self):
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self.events.append(('stopTestRun',))
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def startTest(self, test):
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self.testsRun += 1
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self.events.append(('startTest', self.test_index))
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def stopTest(self, test):
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self.events.append(('stopTest', self.test_index))
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def addError(self, test, err):
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self.check_picklable(test, err)
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self.events.append(('addError', self.test_index, err))
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self.stop_if_failfast()
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def addFailure(self, test, err):
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self.check_picklable(test, err)
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self.events.append(('addFailure', self.test_index, err))
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self.stop_if_failfast()
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def addSubTest(self, test, subtest, err):
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raise NotImplementedError("subtests aren't supported at this time")
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def addSuccess(self, test):
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self.events.append(('addSuccess', self.test_index))
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def addSkip(self, test, reason):
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self.events.append(('addSkip', self.test_index, reason))
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def addExpectedFailure(self, test, err):
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# If tblib isn't installed, pickling the traceback will always fail.
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# However we don't want tblib to be required for running the tests
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# when they pass or fail as expected. Drop the traceback when an
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# expected failure occurs.
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if tblib is None:
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err = err[0], err[1], None
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self.check_picklable(test, err)
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self.events.append(('addExpectedFailure', self.test_index, err))
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def addUnexpectedSuccess(self, test):
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self.events.append(('addUnexpectedSuccess', self.test_index))
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self.stop_if_failfast()
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class RemoteTestRunner(object):
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"""
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Run tests and record everything but don't display anything.
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The implementation matches the unpythonic coding style of unittest2.
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"""
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resultclass = RemoteTestResult
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def __init__(self, failfast=False, resultclass=None):
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self.failfast = failfast
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if resultclass is not None:
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self.resultclass = resultclass
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def run(self, test):
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result = self.resultclass()
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unittest.registerResult(result)
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result.failfast = self.failfast
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test(result)
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return result
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def default_test_processes():
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"""
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Default number of test processes when using the --parallel option.
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"""
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# The current implementation of the parallel test runner requires
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# multiprocessing to start subprocesses with fork().
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# On Python 3.4+: if multiprocessing.get_start_method() != 'fork':
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if not hasattr(os, 'fork'):
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return 1
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try:
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return int(os.environ['DJANGO_TEST_PROCESSES'])
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except KeyError:
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return multiprocessing.cpu_count()
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_worker_id = 0
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def _init_worker(counter):
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"""
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Switch to databases dedicated to this worker.
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This helper lives at module-level because of the multiprocessing module's
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requirements.
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"""
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global _worker_id
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with counter.get_lock():
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counter.value += 1
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_worker_id = counter.value
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for alias in connections:
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connection = connections[alias]
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settings_dict = connection.creation.get_test_db_clone_settings(_worker_id)
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# connection.settings_dict must be updated in place for changes to be
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# reflected in django.db.connections. If the following line assigned
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# connection.settings_dict = settings_dict, new threads would connect
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# to the default database instead of the appropriate clone.
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connection.settings_dict.update(settings_dict)
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connection.close()
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def _run_subsuite(args):
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"""
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Run a suite of tests with a RemoteTestRunner and return a RemoteTestResult.
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This helper lives at module-level and its arguments are wrapped in a tuple
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because of the multiprocessing module's requirements.
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"""
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runner_class, subsuite_index, subsuite, failfast = args
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runner = runner_class(failfast=failfast)
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result = runner.run(subsuite)
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return subsuite_index, result.events
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class ParallelTestSuite(unittest.TestSuite):
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"""
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Run a series of tests in parallel in several processes.
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While the unittest module's documentation implies that orchestrating the
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execution of tests is the responsibility of the test runner, in practice,
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it appears that TestRunner classes are more concerned with formatting and
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displaying test results.
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Since there are fewer use cases for customizing TestSuite than TestRunner,
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implementing parallelization at the level of the TestSuite improves
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interoperability with existing custom test runners. A single instance of a
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test runner can still collect results from all tests without being aware
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that they have been run in parallel.
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"""
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# In case someone wants to modify these in a subclass.
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init_worker = _init_worker
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run_subsuite = _run_subsuite
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runner_class = RemoteTestRunner
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def __init__(self, suite, processes, failfast=False):
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self.subsuites = partition_suite_by_case(suite)
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self.processes = processes
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self.failfast = failfast
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super(ParallelTestSuite, self).__init__()
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def run(self, result):
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"""
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Distribute test cases across workers.
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Return an identifier of each test case with its result in order to use
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imap_unordered to show results as soon as they're available.
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To minimize pickling errors when getting results from workers:
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- pass back numeric indexes in self.subsuites instead of tests
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- make tracebacks picklable with tblib, if available
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Even with tblib, errors may still occur for dynamically created
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exception classes such Model.DoesNotExist which cannot be unpickled.
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"""
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if tblib is not None:
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tblib.pickling_support.install()
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counter = multiprocessing.Value(ctypes.c_int, 0)
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pool = multiprocessing.Pool(
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processes=self.processes,
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initializer=self.init_worker.__func__,
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initargs=[counter])
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args = [
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(self.runner_class, index, subsuite, self.failfast)
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for index, subsuite in enumerate(self.subsuites)
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]
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test_results = pool.imap_unordered(self.run_subsuite.__func__, args)
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while True:
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if result.shouldStop:
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pool.terminate()
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break
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try:
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subsuite_index, events = test_results.next(timeout=0.1)
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except multiprocessing.TimeoutError:
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continue
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except StopIteration:
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pool.close()
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break
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tests = list(self.subsuites[subsuite_index])
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for event in events:
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event_name = event[0]
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handler = getattr(result, event_name, None)
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if handler is None:
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continue
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test = tests[event[1]]
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args = event[2:]
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handler(test, *args)
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pool.join()
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return result
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class DiscoverRunner(object):
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"""
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A Django test runner that uses unittest2 test discovery.
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"""
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test_suite = unittest.TestSuite
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parallel_test_suite = ParallelTestSuite
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test_runner = unittest.TextTestRunner
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test_loader = unittest.defaultTestLoader
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reorder_by = (TestCase, SimpleTestCase)
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def __init__(self, pattern=None, top_level=None, verbosity=1,
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interactive=True, failfast=False, keepdb=False,
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reverse=False, debug_mode=False, debug_sql=False, parallel=0,
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tags=None, exclude_tags=None, **kwargs):
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self.pattern = pattern
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self.top_level = top_level
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self.verbosity = verbosity
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self.interactive = interactive
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self.failfast = failfast
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self.keepdb = keepdb
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self.reverse = reverse
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self.debug_mode = debug_mode
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self.debug_sql = debug_sql
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self.parallel = parallel
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self.tags = set(tags or [])
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self.exclude_tags = set(exclude_tags or [])
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@classmethod
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def add_arguments(cls, parser):
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parser.add_argument(
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'-t', '--top-level-directory', action='store', dest='top_level', default=None,
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help='Top level of project for unittest discovery.',
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)
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parser.add_argument(
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'-p', '--pattern', action='store', dest='pattern', default="test*.py",
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help='The test matching pattern. Defaults to test*.py.',
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)
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parser.add_argument(
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'-k', '--keepdb', action='store_true', dest='keepdb', default=False,
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help='Preserves the test DB between runs.'
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)
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parser.add_argument(
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'-r', '--reverse', action='store_true', dest='reverse', default=False,
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help='Reverses test cases order.',
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)
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parser.add_argument(
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'--debug-mode', action='store_true', dest='debug_mode', default=False,
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help='Sets settings.DEBUG to True.',
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)
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parser.add_argument(
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'-d', '--debug-sql', action='store_true', dest='debug_sql', default=False,
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help='Prints logged SQL queries on failure.',
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)
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parser.add_argument(
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'--parallel', dest='parallel', nargs='?', default=1, type=int,
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const=default_test_processes(), metavar='N',
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help='Run tests using up to N parallel processes.',
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)
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parser.add_argument(
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'--tag', action='append', dest='tags',
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help='Run only tests with the specified tag. Can be used multiple times.',
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)
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parser.add_argument(
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'--exclude-tag', action='append', dest='exclude_tags',
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help='Do not run tests with the specified tag. Can be used multiple times.',
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)
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def setup_test_environment(self, **kwargs):
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setup_test_environment(debug=self.debug_mode)
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unittest.installHandler()
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def build_suite(self, test_labels=None, extra_tests=None, **kwargs):
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suite = self.test_suite()
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test_labels = test_labels or ['.']
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extra_tests = extra_tests or []
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discover_kwargs = {}
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if self.pattern is not None:
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discover_kwargs['pattern'] = self.pattern
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if self.top_level is not None:
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discover_kwargs['top_level_dir'] = self.top_level
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for label in test_labels:
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kwargs = discover_kwargs.copy()
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tests = None
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label_as_path = os.path.abspath(label)
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# if a module, or "module.ClassName[.method_name]", just run those
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if not os.path.exists(label_as_path):
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tests = self.test_loader.loadTestsFromName(label)
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elif os.path.isdir(label_as_path) and not self.top_level:
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# Try to be a bit smarter than unittest about finding the
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# default top-level for a given directory path, to avoid
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# breaking relative imports. (Unittest's default is to set
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# top-level equal to the path, which means relative imports
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# will result in "Attempted relative import in non-package.").
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# We'd be happy to skip this and require dotted module paths
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# (which don't cause this problem) instead of file paths (which
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# do), but in the case of a directory in the cwd, which would
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# be equally valid if considered as a top-level module or as a
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# directory path, unittest unfortunately prefers the latter.
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top_level = label_as_path
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while True:
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init_py = os.path.join(top_level, '__init__.py')
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if os.path.exists(init_py):
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try_next = os.path.dirname(top_level)
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if try_next == top_level:
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# __init__.py all the way down? give up.
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break
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top_level = try_next
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continue
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break
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kwargs['top_level_dir'] = top_level
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if not (tests and tests.countTestCases()) and is_discoverable(label):
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# Try discovery if path is a package or directory
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tests = self.test_loader.discover(start_dir=label, **kwargs)
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# Make unittest forget the top-level dir it calculated from this
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# run, to support running tests from two different top-levels.
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self.test_loader._top_level_dir = None
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suite.addTests(tests)
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for test in extra_tests:
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suite.addTest(test)
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if self.tags or self.exclude_tags:
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suite = filter_tests_by_tags(suite, self.tags, self.exclude_tags)
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suite = reorder_suite(suite, self.reorder_by, self.reverse)
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if self.parallel > 1:
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parallel_suite = self.parallel_test_suite(suite, self.parallel, self.failfast)
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# Since tests are distributed across processes on a per-TestCase
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# basis, there's no need for more processes than TestCases.
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parallel_units = len(parallel_suite.subsuites)
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if self.parallel > parallel_units:
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self.parallel = parallel_units
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# If there's only one TestCase, parallelization isn't needed.
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if self.parallel > 1:
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suite = parallel_suite
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return suite
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def setup_databases(self, **kwargs):
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return _setup_databases(
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self.verbosity, self.interactive, self.keepdb, self.debug_sql,
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self.parallel, **kwargs
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)
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def get_resultclass(self):
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return DebugSQLTextTestResult if self.debug_sql else None
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def get_test_runner_kwargs(self):
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return dict(
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failfast=self.failfast,
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resultclass=self.get_resultclass(),
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verbosity=self.verbosity,
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)
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def run_suite(self, suite, **kwargs):
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kwargs = self.get_test_runner_kwargs()
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runner = self.test_runner(**kwargs)
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return runner.run(suite)
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|
|
def teardown_databases(self, old_config, **kwargs):
|
|
"""
|
|
Destroys all the non-mirror databases.
|
|
"""
|
|
_teardown_databases(
|
|
old_config,
|
|
verbosity=self.verbosity,
|
|
parallel=self.parallel,
|
|
keepdb=self.keepdb,
|
|
)
|
|
|
|
def teardown_test_environment(self, **kwargs):
|
|
unittest.removeHandler()
|
|
teardown_test_environment()
|
|
|
|
def suite_result(self, suite, result, **kwargs):
|
|
return len(result.failures) + len(result.errors)
|
|
|
|
def run_tests(self, test_labels, extra_tests=None, **kwargs):
|
|
"""
|
|
Run the unit tests for all the test labels in the provided list.
|
|
|
|
Test labels should be dotted Python paths to test modules, test
|
|
classes, or test methods.
|
|
|
|
A list of 'extra' tests may also be provided; these tests
|
|
will be added to the test suite.
|
|
|
|
Returns the number of tests that failed.
|
|
"""
|
|
self.setup_test_environment()
|
|
suite = self.build_suite(test_labels, extra_tests)
|
|
old_config = self.setup_databases()
|
|
result = self.run_suite(suite)
|
|
self.teardown_databases(old_config)
|
|
self.teardown_test_environment()
|
|
return self.suite_result(suite, result)
|
|
|
|
|
|
def is_discoverable(label):
|
|
"""
|
|
Check if a test label points to a python package or file directory.
|
|
|
|
Relative labels like "." and ".." are seen as directories.
|
|
"""
|
|
try:
|
|
mod = import_module(label)
|
|
except (ImportError, TypeError):
|
|
pass
|
|
else:
|
|
return hasattr(mod, '__path__')
|
|
|
|
return os.path.isdir(os.path.abspath(label))
|
|
|
|
|
|
def reorder_suite(suite, classes, reverse=False):
|
|
"""
|
|
Reorders a test suite by test type.
|
|
|
|
`classes` is a sequence of types
|
|
|
|
All tests of type classes[0] are placed first, then tests of type
|
|
classes[1], etc. Tests with no match in classes are placed last.
|
|
|
|
If `reverse` is True, tests within classes are sorted in opposite order,
|
|
but test classes are not reversed.
|
|
"""
|
|
class_count = len(classes)
|
|
suite_class = type(suite)
|
|
bins = [OrderedSet() for i in range(class_count + 1)]
|
|
partition_suite_by_type(suite, classes, bins, reverse=reverse)
|
|
reordered_suite = suite_class()
|
|
for i in range(class_count + 1):
|
|
reordered_suite.addTests(bins[i])
|
|
return reordered_suite
|
|
|
|
|
|
def partition_suite_by_type(suite, classes, bins, reverse=False):
|
|
"""
|
|
Partitions a test suite by test type. Also prevents duplicated tests.
|
|
|
|
classes is a sequence of types
|
|
bins is a sequence of TestSuites, one more than classes
|
|
reverse changes the ordering of tests within bins
|
|
|
|
Tests of type classes[i] are added to bins[i],
|
|
tests with no match found in classes are place in bins[-1]
|
|
"""
|
|
suite_class = type(suite)
|
|
if reverse:
|
|
suite = reversed(tuple(suite))
|
|
for test in suite:
|
|
if isinstance(test, suite_class):
|
|
partition_suite_by_type(test, classes, bins, reverse=reverse)
|
|
else:
|
|
for i in range(len(classes)):
|
|
if isinstance(test, classes[i]):
|
|
bins[i].add(test)
|
|
break
|
|
else:
|
|
bins[-1].add(test)
|
|
|
|
|
|
def partition_suite_by_case(suite):
|
|
"""
|
|
Partitions a test suite by test case, preserving the order of tests.
|
|
"""
|
|
groups = []
|
|
suite_class = type(suite)
|
|
for test_type, test_group in itertools.groupby(suite, type):
|
|
if issubclass(test_type, unittest.TestCase):
|
|
groups.append(suite_class(test_group))
|
|
else:
|
|
for item in test_group:
|
|
groups.extend(partition_suite_by_case(item))
|
|
return groups
|
|
|
|
|
|
def setup_databases(*args, **kwargs):
|
|
warnings.warn(
|
|
'`django.test.runner.setup_databases()` has moved to '
|
|
'`django.test.utils.setup_databases()`.',
|
|
RemovedInDjango21Warning,
|
|
stacklevel=2,
|
|
)
|
|
return _setup_databases(*args, **kwargs)
|
|
|
|
|
|
def filter_tests_by_tags(suite, tags, exclude_tags):
|
|
suite_class = type(suite)
|
|
filtered_suite = suite_class()
|
|
|
|
for test in suite:
|
|
if isinstance(test, suite_class):
|
|
filtered_suite.addTests(filter_tests_by_tags(test, tags, exclude_tags))
|
|
else:
|
|
test_tags = set(getattr(test, 'tags', set()))
|
|
test_fn_name = getattr(test, '_testMethodName', str(test))
|
|
test_fn = getattr(test, test_fn_name, test)
|
|
test_fn_tags = set(getattr(test_fn, 'tags', set()))
|
|
all_tags = test_tags.union(test_fn_tags)
|
|
matched_tags = all_tags.intersection(tags)
|
|
if (matched_tags or not tags) and not all_tags.intersection(exclude_tags):
|
|
filtered_suite.addTest(test)
|
|
|
|
return filtered_suite
|