mirror of https://github.com/zulip/zulip.git
602 lines
25 KiB
Python
602 lines
25 KiB
Python
from functools import partial
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import random
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from typing import Any, Callable, Dict, List, Optional, Set, Tuple, \
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Type, TypeVar, Union
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from unittest import loader, runner
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from unittest.result import TestResult
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from django.conf import settings
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from django.db import connections, ProgrammingError
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from django.urls.resolvers import URLPattern
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from django.test import TestCase
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from django.test import runner as django_runner
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from django.test.runner import DiscoverRunner
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from django.test.signals import template_rendered
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from zerver.lib import test_helpers
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from zerver.lib.cache import bounce_key_prefix_for_testing
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from zerver.lib.rate_limiter import bounce_redis_key_prefix_for_testing
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from zerver.lib.sqlalchemy_utils import get_sqlalchemy_connection
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from zerver.lib.test_helpers import (
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write_instrumentation_reports,
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append_instrumentation_data
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)
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import os
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import time
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import unittest
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import shutil
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from multiprocessing.sharedctypes import Synchronized
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from scripts.lib.zulip_tools import get_dev_uuid_var_path, TEMPLATE_DATABASE_DIR, \
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get_or_create_dev_uuid_var_path
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# We need to pick an ID for this test-backend invocation, and store it
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# in this global so it can be used in init_worker; this is used to
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# ensure the database IDs we select are unique for each `test-backend`
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# run. This probably should use a locking mechanism rather than the
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# below hack, which fails 1/10000000 of the time.
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random_id_range_start = random.randint(1, 10000000) * 100
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# The root directory for this run of the test suite.
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TEST_RUN_DIR = get_or_create_dev_uuid_var_path(
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os.path.join('test-backend', 'run_{}'.format(random_id_range_start)))
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_worker_id = 0 # Used to identify the worker process.
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ReturnT = TypeVar('ReturnT') # Constrain return type to match
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def slow(slowness_reason: str) -> Callable[[Callable[..., ReturnT]], Callable[..., ReturnT]]:
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'''
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This is a decorate that annotates a test as being "known
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to be slow." The decorator will set expected_run_time and slowness_reason
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as attributes of the function. Other code can use this annotation
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as needed, e.g. to exclude these tests in "fast" mode.
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'''
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def decorator(f: Callable[..., ReturnT]) -> Callable[..., ReturnT]:
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setattr(f, 'slowness_reason', slowness_reason)
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return f
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return decorator
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def is_known_slow_test(test_method: Callable[..., ReturnT]) -> bool:
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return hasattr(test_method, 'slowness_reason')
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def full_test_name(test: TestCase) -> str:
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test_module = test.__module__
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test_class = test.__class__.__name__
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test_method = test._testMethodName
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return '%s.%s.%s' % (test_module, test_class, test_method)
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def get_test_method(test: TestCase) -> Callable[[], None]:
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return getattr(test, test._testMethodName)
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# Each tuple is delay, test_name, slowness_reason
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TEST_TIMINGS = [] # type: List[Tuple[float, str, str]]
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def report_slow_tests() -> None:
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timings = sorted(TEST_TIMINGS, reverse=True)
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print('SLOWNESS REPORT')
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print(' delay test')
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print(' ---- ----')
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for delay, test_name, slowness_reason in timings[:15]:
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if not slowness_reason:
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slowness_reason = 'UNKNOWN WHY SLOW, please investigate'
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print(' %0.3f %s\n %s\n' % (delay, test_name, slowness_reason))
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print('...')
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for delay, test_name, slowness_reason in timings[100:]:
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if slowness_reason:
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print(' %.3f %s is not that slow' % (delay, test_name))
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print(' consider removing @slow decorator')
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print(' This may no longer be true: %s' % (slowness_reason,))
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def enforce_timely_test_completion(test_method: Callable[..., ReturnT], test_name: str,
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delay: float, result: unittest.TestResult) -> None:
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if hasattr(test_method, 'slowness_reason'):
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max_delay = 2.0 # seconds
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else:
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max_delay = 0.4 # seconds
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assert isinstance(result, TextTestResult) or isinstance(result, RemoteTestResult)
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if delay > max_delay:
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msg = '** Test is TOO slow: %s (%.3f s)\n' % (test_name, delay)
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result.addInfo(test_method, msg)
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def fast_tests_only() -> bool:
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return "FAST_TESTS_ONLY" in os.environ
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def run_test(test: TestCase, result: TestResult) -> bool:
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failed = False
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test_method = get_test_method(test)
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if fast_tests_only() and is_known_slow_test(test_method):
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return failed
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test_name = full_test_name(test)
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bounce_key_prefix_for_testing(test_name)
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bounce_redis_key_prefix_for_testing(test_name)
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if not hasattr(test, "_pre_setup"):
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msg = "Test doesn't have _pre_setup; something is wrong."
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error_pre_setup = (Exception, Exception(msg), None)
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result.addError(test, error_pre_setup)
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return True
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test._pre_setup()
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start_time = time.time()
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test(result) # unittest will handle skipping, error, failure and success.
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delay = time.time() - start_time
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enforce_timely_test_completion(test_method, test_name, delay, result)
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slowness_reason = getattr(test_method, 'slowness_reason', '')
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TEST_TIMINGS.append((delay, test_name, slowness_reason))
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test._post_teardown()
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return failed
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class TextTestResult(runner.TextTestResult):
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"""
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This class has unpythonic function names because base class follows
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this style.
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"""
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def __init__(self, *args: Any, **kwargs: Any) -> None:
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super().__init__(*args, **kwargs)
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self.failed_tests = [] # type: List[str]
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def addInfo(self, test: TestCase, msg: str) -> None:
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self.stream.write(msg) # type: ignore # https://github.com/python/typeshed/issues/3139
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self.stream.flush() # type: ignore # https://github.com/python/typeshed/issues/3139
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def addInstrumentation(self, test: TestCase, data: Dict[str, Any]) -> None:
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append_instrumentation_data(data)
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def startTest(self, test: TestCase) -> None:
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TestResult.startTest(self, test)
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self.stream.writeln("Running {}".format(full_test_name(test))) # type: ignore # https://github.com/python/typeshed/issues/3139
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self.stream.flush() # type: ignore # https://github.com/python/typeshed/issues/3139
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def addSuccess(self, *args: Any, **kwargs: Any) -> None:
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TestResult.addSuccess(self, *args, **kwargs)
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def addError(self, *args: Any, **kwargs: Any) -> None:
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TestResult.addError(self, *args, **kwargs)
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test_name = full_test_name(args[0])
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self.failed_tests.append(test_name)
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def addFailure(self, *args: Any, **kwargs: Any) -> None:
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TestResult.addFailure(self, *args, **kwargs)
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test_name = full_test_name(args[0])
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self.failed_tests.append(test_name)
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def addSkip(self, test: TestCase, reason: str) -> None:
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TestResult.addSkip(self, test, reason)
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self.stream.writeln("** Skipping {}: {}".format( # type: ignore # https://github.com/python/typeshed/issues/3139
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full_test_name(test),
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reason))
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self.stream.flush() # type: ignore # https://github.com/python/typeshed/issues/3139
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class RemoteTestResult(django_runner.RemoteTestResult):
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"""
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The class follows the unpythonic style of function names of the
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base class.
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"""
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def addInfo(self, test: TestCase, msg: str) -> None:
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self.events.append(('addInfo', self.test_index, msg))
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def addInstrumentation(self, test: TestCase, data: Dict[str, Any]) -> None:
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# Some elements of data['info'] cannot be serialized.
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if 'info' in data:
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del data['info']
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self.events.append(('addInstrumentation', self.test_index, data))
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def process_instrumented_calls(func: Callable[[Dict[str, Any]], None]) -> None:
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for call in test_helpers.INSTRUMENTED_CALLS:
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func(call)
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SerializedSubsuite = Tuple[Type['TestSuite'], List[str]]
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SubsuiteArgs = Tuple[Type['RemoteTestRunner'], int, SerializedSubsuite, bool]
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def run_subsuite(args: SubsuiteArgs) -> Tuple[int, Any]:
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# Reset the accumulated INSTRUMENTED_CALLS before running this subsuite.
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test_helpers.INSTRUMENTED_CALLS = []
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# The first argument is the test runner class but we don't need it
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# because we run our own version of the runner class.
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_, subsuite_index, subsuite, failfast = args
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runner = RemoteTestRunner(failfast=failfast)
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result = runner.run(deserialize_suite(subsuite))
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# Now we send instrumentation related events. This data will be
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# appended to the data structure in the main thread. For Mypy,
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# type of Partial is different from Callable. All the methods of
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# TestResult are passed TestCase as the first argument but
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# addInstrumentation does not need it.
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process_instrumented_calls(partial(result.addInstrumentation, None))
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return subsuite_index, result.events
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# Monkey-patch database creation to fix unnecessary sleep(1)
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from django.db.backends.postgresql.creation import DatabaseCreation
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def _replacement_destroy_test_db(self: DatabaseCreation,
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test_database_name: str,
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verbosity: int) -> None:
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"""Replacement for Django's _destroy_test_db that removes the
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unnecessary sleep(1)."""
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with self.connection._nodb_connection.cursor() as cursor:
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cursor.execute("DROP DATABASE %s"
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% (self.connection.ops.quote_name(test_database_name),))
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DatabaseCreation._destroy_test_db = _replacement_destroy_test_db
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def destroy_test_databases(worker_id: Optional[int]=None) -> None:
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for alias in connections:
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connection = connections[alias]
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try:
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# In the parallel mode, the test databases are created
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# through the N=self.parallel child processes, and in the
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# parent process (which calls `destroy_test_databases`),
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# `settings_dict` remains unchanged, with the original
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# template database name (zulip_test_template). So to
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# delete the database zulip_test_template_<number>, we
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# need to pass `number` to `destroy_test_db`.
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#
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# When we run in serial mode (self.parallel=1), we don't
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# fork and thus both creation and destruction occur in the
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# same process, which means `settings_dict` has been
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# updated to have `zulip_test_template_<number>` as its
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# database name by the creation code. As a result, to
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# delete that database, we need to not pass a number
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# argument to destroy_test_db.
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if worker_id is not None:
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"""Modified from the Django original to """
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database_id = random_id_range_start + worker_id
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connection.creation.destroy_test_db(suffix=str(database_id))
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else:
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connection.creation.destroy_test_db()
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except ProgrammingError:
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# DB doesn't exist. No need to do anything.
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pass
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def create_test_databases(worker_id: int) -> None:
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database_id = random_id_range_start + worker_id
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for alias in connections:
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connection = connections[alias]
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connection.creation.clone_test_db(
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suffix=str(database_id),
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keepdb=True,
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)
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settings_dict = connection.creation.get_test_db_clone_settings(database_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 init_worker(counter: Synchronized) -> None:
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"""
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This function runs only under parallel mode. It initializes the
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individual processes which are also called workers.
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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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"""
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You can now use _worker_id.
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"""
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# Clear the cache
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from zerver.lib.cache import get_cache_backend
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cache = get_cache_backend(None)
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cache.clear()
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# Close all connections
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connections.close_all()
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destroy_test_databases(_worker_id)
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create_test_databases(_worker_id)
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initialize_worker_path(_worker_id)
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def is_upload_avatar_url(url: URLPattern) -> bool:
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if url.pattern.regex.pattern == r'^user_avatars/(?P<path>.*)$':
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return True
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return False
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# We manually update the upload directory path in the url regex.
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from zproject import dev_urls
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found = False
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for url in dev_urls.urls:
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if is_upload_avatar_url(url):
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found = True
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new_root = os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars")
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url.default_args['document_root'] = new_root
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if not found:
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print("*** Upload directory not found.")
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class TestSuite(unittest.TestSuite):
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def run(self, result: TestResult, debug: Optional[bool]=False) -> TestResult:
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"""
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This function mostly contains the code from
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unittest.TestSuite.run. The need to override this function
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occurred because we use run_test to run the testcase.
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"""
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topLevel = False
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if getattr(result, '_testRunEntered', False) is False:
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result._testRunEntered = topLevel = True # type: ignore
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for test in self:
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# but this is correct. Taken from unittest.
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if result.shouldStop:
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break
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if isinstance(test, TestSuite):
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test.run(result, debug=debug)
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else:
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self._tearDownPreviousClass(test, result) # type: ignore
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self._handleModuleFixture(test, result) # type: ignore
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self._handleClassSetUp(test, result) # type: ignore
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result._previousTestClass = test.__class__ # type: ignore
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if (getattr(test.__class__, '_classSetupFailed', False) or
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getattr(result, '_moduleSetUpFailed', False)):
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continue
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failed = run_test(test, result)
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if failed or result.shouldStop:
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result.shouldStop = True
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break
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if topLevel:
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self._tearDownPreviousClass(None, result) # type: ignore
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self._handleModuleTearDown(result) # type: ignore
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result._testRunEntered = False # type: ignore
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return result
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class TestLoader(loader.TestLoader):
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suiteClass = TestSuite
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class ParallelTestSuite(django_runner.ParallelTestSuite):
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run_subsuite = run_subsuite
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init_worker = init_worker
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def __init__(self, suite: TestSuite, processes: int, failfast: bool) -> None:
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super().__init__(suite, processes, failfast)
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# We can't specify a consistent type for self.subsuites, since
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# the whole idea here is to monkey-patch that so we can use
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# most of django_runner.ParallelTestSuite with our own suite
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# definitions.
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self.subsuites = SubSuiteList(self.subsuites) # type: ignore # Type of self.subsuites changes.
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def check_import_error(test_name: str) -> None:
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try:
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# Directly using __import__ is not recommeded, but here it gives
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# clearer traceback as compared to importlib.import_module.
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__import__(test_name)
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except ImportError as exc:
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raise exc from exc # Disable exception chaining in Python 3.
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def initialize_worker_path(worker_id: int) -> None:
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# Allow each test worker process to write to a unique directory
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# within `TEST_RUN_DIR`.
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worker_path = os.path.join(TEST_RUN_DIR, 'worker_{}'.format(_worker_id))
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os.makedirs(worker_path, exist_ok=True)
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settings.TEST_WORKER_DIR = worker_path
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# Every process should upload to a separate directory so that
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# race conditions can be avoided.
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settings.LOCAL_UPLOADS_DIR = get_or_create_dev_uuid_var_path(
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os.path.join("test-backend",
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os.path.basename(TEST_RUN_DIR),
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os.path.basename(worker_path),
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"test_uploads"))
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class Runner(DiscoverRunner):
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test_suite = TestSuite
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test_loader = TestLoader()
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parallel_test_suite = ParallelTestSuite
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def __init__(self, *args: Any, **kwargs: Any) -> None:
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DiscoverRunner.__init__(self, *args, **kwargs)
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# `templates_rendered` holds templates which were rendered
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# in proper logical tests.
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self.templates_rendered = set() # type: Set[str]
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# `shallow_tested_templates` holds templates which were rendered
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# in `zerver.tests.test_templates`.
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self.shallow_tested_templates = set() # type: Set[str]
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template_rendered.connect(self.on_template_rendered)
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def get_resultclass(self) -> Type[TestResult]:
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return TextTestResult
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def on_template_rendered(self, sender: Any, context: Dict[str, Any], **kwargs: Any) -> None:
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if hasattr(sender, 'template'):
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template_name = sender.template.name
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if template_name not in self.templates_rendered:
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if context.get('shallow_tested') and template_name not in self.templates_rendered:
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self.shallow_tested_templates.add(template_name)
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else:
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self.templates_rendered.add(template_name)
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self.shallow_tested_templates.discard(template_name)
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def get_shallow_tested_templates(self) -> Set[str]:
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return self.shallow_tested_templates
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def setup_test_environment(self, *args: Any, **kwargs: Any) -> Any:
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settings.DATABASES['default']['NAME'] = settings.BACKEND_DATABASE_TEMPLATE
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# We create/destroy the test databases in run_tests to avoid
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# duplicate work when running in parallel mode.
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# Write the template database ids to a file that we can
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# reference for cleaning them up if they leak.
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filepath = os.path.join(get_dev_uuid_var_path(),
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TEMPLATE_DATABASE_DIR,
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str(random_id_range_start))
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os.makedirs(os.path.dirname(filepath), exist_ok=True)
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with open(filepath, "w") as f:
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if self.parallel > 1:
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for index in range(self.parallel):
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f.write(str(random_id_range_start + (index + 1)) + "\n")
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else:
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f.write(str(random_id_range_start) + "\n")
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# Check if we are in serial mode to avoid unnecessarily making a directory.
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# We add "worker_0" in the path for consistency with parallel mode.
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if self.parallel == 1:
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initialize_worker_path(0)
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return super().setup_test_environment(*args, **kwargs)
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def teardown_test_environment(self, *args: Any, **kwargs: Any) -> Any:
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# The test environment setup clones the zulip_test_template
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# database, creating databases with names:
|
|
# 'zulip_test_template_<N, N + self.parallel - 1>',
|
|
# where N is random_id_range_start.
|
|
#
|
|
# We need to delete those databases to avoid leaking disk
|
|
# (Django is smart and calls this on SIGINT too).
|
|
if self.parallel > 1:
|
|
for index in range(self.parallel):
|
|
destroy_test_databases(index + 1)
|
|
else:
|
|
destroy_test_databases()
|
|
|
|
# Clean up our record of which databases this process created.
|
|
filepath = os.path.join(get_dev_uuid_var_path(),
|
|
TEMPLATE_DATABASE_DIR,
|
|
str(random_id_range_start))
|
|
os.remove(filepath)
|
|
|
|
# Clean up our test runs root directory.
|
|
try:
|
|
shutil.rmtree(TEST_RUN_DIR)
|
|
except OSError:
|
|
print("Unable to clean up the test run's directory.")
|
|
pass
|
|
return super().teardown_test_environment(*args, **kwargs)
|
|
|
|
def test_imports(self, test_labels: List[str], suite: Union[TestSuite, ParallelTestSuite]) -> None:
|
|
prefix_old = 'unittest.loader.ModuleImportFailure.' # Python <= 3.4
|
|
prefix_new = 'unittest.loader._FailedTest.' # Python > 3.4
|
|
error_prefixes = [prefix_old, prefix_new]
|
|
for test_name in get_test_names(suite):
|
|
for prefix in error_prefixes:
|
|
if test_name.startswith(prefix):
|
|
test_name = test_name[len(prefix):]
|
|
for label in test_labels:
|
|
# This code block is for Python 3.5 when test label is
|
|
# directly provided, for example:
|
|
# ./tools/test-backend zerver.tests.test_alert_words.py
|
|
#
|
|
# In this case, the test name is of this form:
|
|
# 'unittest.loader._FailedTest.test_alert_words'
|
|
#
|
|
# Whereas check_import_error requires test names of
|
|
# this form:
|
|
# 'unittest.loader._FailedTest.zerver.tests.test_alert_words'.
|
|
if test_name in label:
|
|
test_name = label
|
|
break
|
|
check_import_error(test_name)
|
|
|
|
def run_tests(self, test_labels: List[str],
|
|
extra_tests: Optional[List[TestCase]]=None,
|
|
full_suite: bool=False,
|
|
include_webhooks: bool=False,
|
|
**kwargs: Any) -> Tuple[bool, List[str]]:
|
|
self.setup_test_environment()
|
|
try:
|
|
suite = self.build_suite(test_labels, extra_tests)
|
|
except AttributeError:
|
|
# We are likely to get here only when running tests in serial
|
|
# mode on Python 3.4 or lower.
|
|
# test_labels are always normalized to include the correct prefix.
|
|
# If we run the command with ./tools/test-backend test_alert_words,
|
|
# test_labels will be equal to ['zerver.tests.test_alert_words'].
|
|
for test_label in test_labels:
|
|
check_import_error(test_label)
|
|
|
|
# I think we won't reach this line under normal circumstances, but
|
|
# for some unforeseen scenario in which the AttributeError was not
|
|
# caused by an import error, let's re-raise the exception for
|
|
# debugging purposes.
|
|
raise
|
|
|
|
self.test_imports(test_labels, suite)
|
|
if self.parallel == 1:
|
|
# We are running in serial mode so create the databases here.
|
|
# For parallel mode, the databases are created in init_worker.
|
|
# We don't want to create and destroy DB in setup_test_environment
|
|
# because it will be called for both serial and parallel modes.
|
|
# However, at this point we know in which mode we would be running
|
|
# since that decision has already been made in build_suite().
|
|
#
|
|
# We pass a _worker_id, which in this code path is always 0
|
|
destroy_test_databases(_worker_id)
|
|
create_test_databases(_worker_id)
|
|
|
|
# We have to do the next line to avoid flaky scenarios where we
|
|
# run a single test and getting an SA connection causes data from
|
|
# a Django connection to be rolled back mid-test.
|
|
get_sqlalchemy_connection()
|
|
result = self.run_suite(suite)
|
|
self.teardown_test_environment()
|
|
failed = self.suite_result(suite, result)
|
|
if not failed:
|
|
write_instrumentation_reports(full_suite=full_suite, include_webhooks=include_webhooks)
|
|
return failed, result.failed_tests
|
|
|
|
def get_test_names(suite: Union[TestSuite, ParallelTestSuite]) -> List[str]:
|
|
if isinstance(suite, ParallelTestSuite):
|
|
# suite is ParallelTestSuite. It will have a subsuites parameter of
|
|
# type SubSuiteList. Each element of a SubsuiteList is a tuple whose
|
|
# first element is the type of TestSuite and the second element is a
|
|
# list of test names in that test suite. See serialize_suite() for the
|
|
# implementation details.
|
|
return [name for subsuite in suite.subsuites for name in subsuite[1]]
|
|
else:
|
|
return [full_test_name(t) for t in get_tests_from_suite(suite)]
|
|
|
|
def get_tests_from_suite(suite: unittest.TestSuite) -> TestCase:
|
|
for test in suite:
|
|
if isinstance(test, TestSuite):
|
|
for child in get_tests_from_suite(test):
|
|
yield child
|
|
else:
|
|
yield test
|
|
|
|
def serialize_suite(suite: TestSuite) -> Tuple[Type[TestSuite], List[str]]:
|
|
return type(suite), get_test_names(suite)
|
|
|
|
def deserialize_suite(args: Tuple[Type[TestSuite], List[str]]) -> TestSuite:
|
|
suite_class, test_names = args
|
|
suite = suite_class()
|
|
tests = TestLoader().loadTestsFromNames(test_names)
|
|
for test in get_tests_from_suite(tests):
|
|
suite.addTest(test)
|
|
return suite
|
|
|
|
class RemoteTestRunner(django_runner.RemoteTestRunner):
|
|
resultclass = RemoteTestResult
|
|
|
|
class SubSuiteList(List[Tuple[Type[TestSuite], List[str]]]):
|
|
"""
|
|
This class allows us to avoid changing the main logic of
|
|
ParallelTestSuite and still make it serializable.
|
|
"""
|
|
def __init__(self, suites: List[TestSuite]) -> None:
|
|
serialized_suites = [serialize_suite(s) for s in suites]
|
|
super().__init__(serialized_suites)
|
|
|
|
def __getitem__(self, index: Any) -> Any:
|
|
suite = super().__getitem__(index)
|
|
return deserialize_suite(suite)
|