853 lines
28 KiB
Python
853 lines
28 KiB
Python
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import logging
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import re
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import sys
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import time
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import warnings
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from contextlib import contextmanager
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from functools import wraps
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from io import StringIO
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from itertools import chain
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from types import SimpleNamespace
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from unittest import TestCase, skipIf, skipUnless
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from xml.dom.minidom import Node, parseString
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from django.apps import apps
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from django.apps.registry import Apps
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from django.conf import UserSettingsHolder, settings
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from django.core import mail
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from django.core.exceptions import ImproperlyConfigured
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from django.core.signals import request_started
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from django.db import DEFAULT_DB_ALIAS, connections, reset_queries
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from django.db.models.options import Options
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from django.template import Template
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from django.test.signals import setting_changed, template_rendered
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from django.urls import get_script_prefix, set_script_prefix
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from django.utils.translation import deactivate
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try:
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import jinja2
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except ImportError:
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jinja2 = None
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__all__ = (
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'Approximate', 'ContextList', 'isolate_lru_cache', 'get_runner',
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'modify_settings', 'override_settings',
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'requires_tz_support',
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'setup_test_environment', 'teardown_test_environment',
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)
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TZ_SUPPORT = hasattr(time, 'tzset')
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class Approximate:
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def __init__(self, val, places=7):
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self.val = val
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self.places = places
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def __repr__(self):
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return repr(self.val)
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def __eq__(self, other):
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return self.val == other or round(abs(self.val - other), self.places) == 0
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class ContextList(list):
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"""
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A wrapper that provides direct key access to context items contained
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in a list of context objects.
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"""
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def __getitem__(self, key):
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if isinstance(key, str):
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for subcontext in self:
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if key in subcontext:
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return subcontext[key]
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raise KeyError(key)
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else:
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return super().__getitem__(key)
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def get(self, key, default=None):
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try:
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return self.__getitem__(key)
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except KeyError:
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return default
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def __contains__(self, key):
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try:
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self[key]
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except KeyError:
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return False
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return True
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def keys(self):
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"""
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Flattened keys of subcontexts.
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"""
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return set(chain.from_iterable(d for subcontext in self for d in subcontext))
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def instrumented_test_render(self, context):
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"""
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An instrumented Template render method, providing a signal that can be
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intercepted by the test Client.
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"""
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template_rendered.send(sender=self, template=self, context=context)
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return self.nodelist.render(context)
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class _TestState:
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pass
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def setup_test_environment(debug=None):
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"""
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Perform global pre-test setup, such as installing the instrumented template
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renderer and setting the email backend to the locmem email backend.
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"""
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if hasattr(_TestState, 'saved_data'):
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# Executing this function twice would overwrite the saved values.
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raise RuntimeError(
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"setup_test_environment() was already called and can't be called "
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"again without first calling teardown_test_environment()."
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)
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if debug is None:
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debug = settings.DEBUG
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saved_data = SimpleNamespace()
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_TestState.saved_data = saved_data
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saved_data.allowed_hosts = settings.ALLOWED_HOSTS
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# Add the default host of the test client.
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settings.ALLOWED_HOSTS = [*settings.ALLOWED_HOSTS, 'testserver']
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saved_data.debug = settings.DEBUG
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settings.DEBUG = debug
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saved_data.email_backend = settings.EMAIL_BACKEND
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settings.EMAIL_BACKEND = 'django.core.mail.backends.locmem.EmailBackend'
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saved_data.template_render = Template._render
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Template._render = instrumented_test_render
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mail.outbox = []
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deactivate()
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def teardown_test_environment():
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"""
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Perform any global post-test teardown, such as restoring the original
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template renderer and restoring the email sending functions.
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"""
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saved_data = _TestState.saved_data
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settings.ALLOWED_HOSTS = saved_data.allowed_hosts
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settings.DEBUG = saved_data.debug
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settings.EMAIL_BACKEND = saved_data.email_backend
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Template._render = saved_data.template_render
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del _TestState.saved_data
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del mail.outbox
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def setup_databases(verbosity, interactive, keepdb=False, debug_sql=False, parallel=0, aliases=None, **kwargs):
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"""Create the test databases."""
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test_databases, mirrored_aliases = get_unique_databases_and_mirrors(aliases)
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old_names = []
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for db_name, aliases in test_databases.values():
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first_alias = None
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for alias in aliases:
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connection = connections[alias]
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old_names.append((connection, db_name, first_alias is None))
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# Actually create the database for the first connection
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if first_alias is None:
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first_alias = alias
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connection.creation.create_test_db(
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verbosity=verbosity,
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autoclobber=not interactive,
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keepdb=keepdb,
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serialize=connection.settings_dict.get('TEST', {}).get('SERIALIZE', True),
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)
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if parallel > 1:
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for index in range(parallel):
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connection.creation.clone_test_db(
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suffix=str(index + 1),
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verbosity=verbosity,
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keepdb=keepdb,
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)
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# Configure all other connections as mirrors of the first one
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else:
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connections[alias].creation.set_as_test_mirror(connections[first_alias].settings_dict)
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# Configure the test mirrors.
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for alias, mirror_alias in mirrored_aliases.items():
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connections[alias].creation.set_as_test_mirror(
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connections[mirror_alias].settings_dict)
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if debug_sql:
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for alias in connections:
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connections[alias].force_debug_cursor = True
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return old_names
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def dependency_ordered(test_databases, dependencies):
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"""
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Reorder test_databases into an order that honors the dependencies
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described in TEST[DEPENDENCIES].
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"""
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ordered_test_databases = []
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resolved_databases = set()
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# Maps db signature to dependencies of all its aliases
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dependencies_map = {}
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# Check that no database depends on its own alias
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for sig, (_, aliases) in test_databases:
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all_deps = set()
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for alias in aliases:
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all_deps.update(dependencies.get(alias, []))
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if not all_deps.isdisjoint(aliases):
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raise ImproperlyConfigured(
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"Circular dependency: databases %r depend on each other, "
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"but are aliases." % aliases
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)
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dependencies_map[sig] = all_deps
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while test_databases:
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changed = False
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deferred = []
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# Try to find a DB that has all its dependencies met
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for signature, (db_name, aliases) in test_databases:
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if dependencies_map[signature].issubset(resolved_databases):
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resolved_databases.update(aliases)
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ordered_test_databases.append((signature, (db_name, aliases)))
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changed = True
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else:
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deferred.append((signature, (db_name, aliases)))
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if not changed:
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raise ImproperlyConfigured("Circular dependency in TEST[DEPENDENCIES]")
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test_databases = deferred
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return ordered_test_databases
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def get_unique_databases_and_mirrors(aliases=None):
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"""
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Figure out which databases actually need to be created.
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Deduplicate entries in DATABASES that correspond the same database or are
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configured as test mirrors.
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Return two values:
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- test_databases: ordered mapping of signatures to (name, list of aliases)
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where all aliases share the same underlying database.
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- mirrored_aliases: mapping of mirror aliases to original aliases.
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"""
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if aliases is None:
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aliases = connections
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mirrored_aliases = {}
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test_databases = {}
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dependencies = {}
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default_sig = connections[DEFAULT_DB_ALIAS].creation.test_db_signature()
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for alias in connections:
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connection = connections[alias]
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test_settings = connection.settings_dict['TEST']
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if test_settings['MIRROR']:
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# If the database is marked as a test mirror, save the alias.
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mirrored_aliases[alias] = test_settings['MIRROR']
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elif alias in aliases:
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# Store a tuple with DB parameters that uniquely identify it.
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# If we have two aliases with the same values for that tuple,
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# we only need to create the test database once.
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item = test_databases.setdefault(
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connection.creation.test_db_signature(),
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(connection.settings_dict['NAME'], set())
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)
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item[1].add(alias)
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if 'DEPENDENCIES' in test_settings:
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dependencies[alias] = test_settings['DEPENDENCIES']
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else:
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if alias != DEFAULT_DB_ALIAS and connection.creation.test_db_signature() != default_sig:
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dependencies[alias] = test_settings.get('DEPENDENCIES', [DEFAULT_DB_ALIAS])
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test_databases = dict(dependency_ordered(test_databases.items(), dependencies))
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return test_databases, mirrored_aliases
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def teardown_databases(old_config, verbosity, parallel=0, keepdb=False):
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"""Destroy all the non-mirror databases."""
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for connection, old_name, destroy in old_config:
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if destroy:
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if parallel > 1:
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for index in range(parallel):
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connection.creation.destroy_test_db(
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suffix=str(index + 1),
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verbosity=verbosity,
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keepdb=keepdb,
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)
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connection.creation.destroy_test_db(old_name, verbosity, keepdb)
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def get_runner(settings, test_runner_class=None):
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test_runner_class = test_runner_class or settings.TEST_RUNNER
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test_path = test_runner_class.split('.')
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# Allow for relative paths
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if len(test_path) > 1:
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test_module_name = '.'.join(test_path[:-1])
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else:
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test_module_name = '.'
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test_module = __import__(test_module_name, {}, {}, test_path[-1])
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return getattr(test_module, test_path[-1])
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class TestContextDecorator:
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"""
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A base class that can either be used as a context manager during tests
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or as a test function or unittest.TestCase subclass decorator to perform
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temporary alterations.
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`attr_name`: attribute assigned the return value of enable() if used as
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a class decorator.
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`kwarg_name`: keyword argument passing the return value of enable() if
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used as a function decorator.
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"""
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def __init__(self, attr_name=None, kwarg_name=None):
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self.attr_name = attr_name
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self.kwarg_name = kwarg_name
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def enable(self):
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raise NotImplementedError
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def disable(self):
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raise NotImplementedError
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def __enter__(self):
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return self.enable()
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def __exit__(self, exc_type, exc_value, traceback):
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self.disable()
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def decorate_class(self, cls):
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if issubclass(cls, TestCase):
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decorated_setUp = cls.setUp
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decorated_tearDown = cls.tearDown
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def setUp(inner_self):
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context = self.enable()
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if self.attr_name:
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setattr(inner_self, self.attr_name, context)
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try:
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decorated_setUp(inner_self)
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except Exception:
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self.disable()
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raise
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def tearDown(inner_self):
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decorated_tearDown(inner_self)
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self.disable()
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cls.setUp = setUp
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cls.tearDown = tearDown
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return cls
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raise TypeError('Can only decorate subclasses of unittest.TestCase')
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def decorate_callable(self, func):
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@wraps(func)
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def inner(*args, **kwargs):
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with self as context:
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if self.kwarg_name:
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kwargs[self.kwarg_name] = context
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return func(*args, **kwargs)
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return inner
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def __call__(self, decorated):
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if isinstance(decorated, type):
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return self.decorate_class(decorated)
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elif callable(decorated):
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return self.decorate_callable(decorated)
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raise TypeError('Cannot decorate object of type %s' % type(decorated))
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class override_settings(TestContextDecorator):
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"""
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Act as either a decorator or a context manager. If it's a decorator, take a
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function and return a wrapped function. If it's a contextmanager, use it
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with the ``with`` statement. In either event, entering/exiting are called
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before and after, respectively, the function/block is executed.
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"""
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enable_exception = None
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def __init__(self, **kwargs):
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self.options = kwargs
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||
|
|
super().__init__()
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
# Keep this code at the beginning to leave the settings unchanged
|
||
|
|
# in case it raises an exception because INSTALLED_APPS is invalid.
|
||
|
|
if 'INSTALLED_APPS' in self.options:
|
||
|
|
try:
|
||
|
|
apps.set_installed_apps(self.options['INSTALLED_APPS'])
|
||
|
|
except Exception:
|
||
|
|
apps.unset_installed_apps()
|
||
|
|
raise
|
||
|
|
override = UserSettingsHolder(settings._wrapped)
|
||
|
|
for key, new_value in self.options.items():
|
||
|
|
setattr(override, key, new_value)
|
||
|
|
self.wrapped = settings._wrapped
|
||
|
|
settings._wrapped = override
|
||
|
|
for key, new_value in self.options.items():
|
||
|
|
try:
|
||
|
|
setting_changed.send(
|
||
|
|
sender=settings._wrapped.__class__,
|
||
|
|
setting=key, value=new_value, enter=True,
|
||
|
|
)
|
||
|
|
except Exception as exc:
|
||
|
|
self.enable_exception = exc
|
||
|
|
self.disable()
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
if 'INSTALLED_APPS' in self.options:
|
||
|
|
apps.unset_installed_apps()
|
||
|
|
settings._wrapped = self.wrapped
|
||
|
|
del self.wrapped
|
||
|
|
responses = []
|
||
|
|
for key in self.options:
|
||
|
|
new_value = getattr(settings, key, None)
|
||
|
|
responses_for_setting = setting_changed.send_robust(
|
||
|
|
sender=settings._wrapped.__class__,
|
||
|
|
setting=key, value=new_value, enter=False,
|
||
|
|
)
|
||
|
|
responses.extend(responses_for_setting)
|
||
|
|
if self.enable_exception is not None:
|
||
|
|
exc = self.enable_exception
|
||
|
|
self.enable_exception = None
|
||
|
|
raise exc
|
||
|
|
for _, response in responses:
|
||
|
|
if isinstance(response, Exception):
|
||
|
|
raise response
|
||
|
|
|
||
|
|
def save_options(self, test_func):
|
||
|
|
if test_func._overridden_settings is None:
|
||
|
|
test_func._overridden_settings = self.options
|
||
|
|
else:
|
||
|
|
# Duplicate dict to prevent subclasses from altering their parent.
|
||
|
|
test_func._overridden_settings = {
|
||
|
|
**test_func._overridden_settings,
|
||
|
|
**self.options,
|
||
|
|
}
|
||
|
|
|
||
|
|
def decorate_class(self, cls):
|
||
|
|
from django.test import SimpleTestCase
|
||
|
|
if not issubclass(cls, SimpleTestCase):
|
||
|
|
raise ValueError(
|
||
|
|
"Only subclasses of Django SimpleTestCase can be decorated "
|
||
|
|
"with override_settings")
|
||
|
|
self.save_options(cls)
|
||
|
|
return cls
|
||
|
|
|
||
|
|
|
||
|
|
class modify_settings(override_settings):
|
||
|
|
"""
|
||
|
|
Like override_settings, but makes it possible to append, prepend, or remove
|
||
|
|
items instead of redefining the entire list.
|
||
|
|
"""
|
||
|
|
def __init__(self, *args, **kwargs):
|
||
|
|
if args:
|
||
|
|
# Hack used when instantiating from SimpleTestCase.setUpClass.
|
||
|
|
assert not kwargs
|
||
|
|
self.operations = args[0]
|
||
|
|
else:
|
||
|
|
assert not args
|
||
|
|
self.operations = list(kwargs.items())
|
||
|
|
super(override_settings, self).__init__()
|
||
|
|
|
||
|
|
def save_options(self, test_func):
|
||
|
|
if test_func._modified_settings is None:
|
||
|
|
test_func._modified_settings = self.operations
|
||
|
|
else:
|
||
|
|
# Duplicate list to prevent subclasses from altering their parent.
|
||
|
|
test_func._modified_settings = list(
|
||
|
|
test_func._modified_settings) + self.operations
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.options = {}
|
||
|
|
for name, operations in self.operations:
|
||
|
|
try:
|
||
|
|
# When called from SimpleTestCase.setUpClass, values may be
|
||
|
|
# overridden several times; cumulate changes.
|
||
|
|
value = self.options[name]
|
||
|
|
except KeyError:
|
||
|
|
value = list(getattr(settings, name, []))
|
||
|
|
for action, items in operations.items():
|
||
|
|
# items my be a single value or an iterable.
|
||
|
|
if isinstance(items, str):
|
||
|
|
items = [items]
|
||
|
|
if action == 'append':
|
||
|
|
value = value + [item for item in items if item not in value]
|
||
|
|
elif action == 'prepend':
|
||
|
|
value = [item for item in items if item not in value] + value
|
||
|
|
elif action == 'remove':
|
||
|
|
value = [item for item in value if item not in items]
|
||
|
|
else:
|
||
|
|
raise ValueError("Unsupported action: %s" % action)
|
||
|
|
self.options[name] = value
|
||
|
|
super().enable()
|
||
|
|
|
||
|
|
|
||
|
|
class override_system_checks(TestContextDecorator):
|
||
|
|
"""
|
||
|
|
Act as a decorator. Override list of registered system checks.
|
||
|
|
Useful when you override `INSTALLED_APPS`, e.g. if you exclude `auth` app,
|
||
|
|
you also need to exclude its system checks.
|
||
|
|
"""
|
||
|
|
def __init__(self, new_checks, deployment_checks=None):
|
||
|
|
from django.core.checks.registry import registry
|
||
|
|
self.registry = registry
|
||
|
|
self.new_checks = new_checks
|
||
|
|
self.deployment_checks = deployment_checks
|
||
|
|
super().__init__()
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.old_checks = self.registry.registered_checks
|
||
|
|
self.registry.registered_checks = set()
|
||
|
|
for check in self.new_checks:
|
||
|
|
self.registry.register(check, *getattr(check, 'tags', ()))
|
||
|
|
self.old_deployment_checks = self.registry.deployment_checks
|
||
|
|
if self.deployment_checks is not None:
|
||
|
|
self.registry.deployment_checks = set()
|
||
|
|
for check in self.deployment_checks:
|
||
|
|
self.registry.register(check, *getattr(check, 'tags', ()), deploy=True)
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
self.registry.registered_checks = self.old_checks
|
||
|
|
self.registry.deployment_checks = self.old_deployment_checks
|
||
|
|
|
||
|
|
|
||
|
|
def compare_xml(want, got):
|
||
|
|
"""
|
||
|
|
Try to do a 'xml-comparison' of want and got. Plain string comparison
|
||
|
|
doesn't always work because, for example, attribute ordering should not be
|
||
|
|
important. Ignore comment nodes, document type node, and leading and
|
||
|
|
trailing whitespaces.
|
||
|
|
|
||
|
|
Based on https://github.com/lxml/lxml/blob/master/src/lxml/doctestcompare.py
|
||
|
|
"""
|
||
|
|
_norm_whitespace_re = re.compile(r'[ \t\n][ \t\n]+')
|
||
|
|
|
||
|
|
def norm_whitespace(v):
|
||
|
|
return _norm_whitespace_re.sub(' ', v)
|
||
|
|
|
||
|
|
def child_text(element):
|
||
|
|
return ''.join(c.data for c in element.childNodes
|
||
|
|
if c.nodeType == Node.TEXT_NODE)
|
||
|
|
|
||
|
|
def children(element):
|
||
|
|
return [c for c in element.childNodes
|
||
|
|
if c.nodeType == Node.ELEMENT_NODE]
|
||
|
|
|
||
|
|
def norm_child_text(element):
|
||
|
|
return norm_whitespace(child_text(element))
|
||
|
|
|
||
|
|
def attrs_dict(element):
|
||
|
|
return dict(element.attributes.items())
|
||
|
|
|
||
|
|
def check_element(want_element, got_element):
|
||
|
|
if want_element.tagName != got_element.tagName:
|
||
|
|
return False
|
||
|
|
if norm_child_text(want_element) != norm_child_text(got_element):
|
||
|
|
return False
|
||
|
|
if attrs_dict(want_element) != attrs_dict(got_element):
|
||
|
|
return False
|
||
|
|
want_children = children(want_element)
|
||
|
|
got_children = children(got_element)
|
||
|
|
if len(want_children) != len(got_children):
|
||
|
|
return False
|
||
|
|
return all(check_element(want, got) for want, got in zip(want_children, got_children))
|
||
|
|
|
||
|
|
def first_node(document):
|
||
|
|
for node in document.childNodes:
|
||
|
|
if node.nodeType not in (Node.COMMENT_NODE, Node.DOCUMENT_TYPE_NODE):
|
||
|
|
return node
|
||
|
|
|
||
|
|
want = want.strip().replace('\\n', '\n')
|
||
|
|
got = got.strip().replace('\\n', '\n')
|
||
|
|
|
||
|
|
# If the string is not a complete xml document, we may need to add a
|
||
|
|
# root element. This allow us to compare fragments, like "<foo/><bar/>"
|
||
|
|
if not want.startswith('<?xml'):
|
||
|
|
wrapper = '<root>%s</root>'
|
||
|
|
want = wrapper % want
|
||
|
|
got = wrapper % got
|
||
|
|
|
||
|
|
# Parse the want and got strings, and compare the parsings.
|
||
|
|
want_root = first_node(parseString(want))
|
||
|
|
got_root = first_node(parseString(got))
|
||
|
|
|
||
|
|
return check_element(want_root, got_root)
|
||
|
|
|
||
|
|
|
||
|
|
class CaptureQueriesContext:
|
||
|
|
"""
|
||
|
|
Context manager that captures queries executed by the specified connection.
|
||
|
|
"""
|
||
|
|
def __init__(self, connection):
|
||
|
|
self.connection = connection
|
||
|
|
|
||
|
|
def __iter__(self):
|
||
|
|
return iter(self.captured_queries)
|
||
|
|
|
||
|
|
def __getitem__(self, index):
|
||
|
|
return self.captured_queries[index]
|
||
|
|
|
||
|
|
def __len__(self):
|
||
|
|
return len(self.captured_queries)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def captured_queries(self):
|
||
|
|
return self.connection.queries[self.initial_queries:self.final_queries]
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
self.force_debug_cursor = self.connection.force_debug_cursor
|
||
|
|
self.connection.force_debug_cursor = True
|
||
|
|
# Run any initialization queries if needed so that they won't be
|
||
|
|
# included as part of the count.
|
||
|
|
self.connection.ensure_connection()
|
||
|
|
self.initial_queries = len(self.connection.queries_log)
|
||
|
|
self.final_queries = None
|
||
|
|
request_started.disconnect(reset_queries)
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, exc_type, exc_value, traceback):
|
||
|
|
self.connection.force_debug_cursor = self.force_debug_cursor
|
||
|
|
request_started.connect(reset_queries)
|
||
|
|
if exc_type is not None:
|
||
|
|
return
|
||
|
|
self.final_queries = len(self.connection.queries_log)
|
||
|
|
|
||
|
|
|
||
|
|
class ignore_warnings(TestContextDecorator):
|
||
|
|
def __init__(self, **kwargs):
|
||
|
|
self.ignore_kwargs = kwargs
|
||
|
|
if 'message' in self.ignore_kwargs or 'module' in self.ignore_kwargs:
|
||
|
|
self.filter_func = warnings.filterwarnings
|
||
|
|
else:
|
||
|
|
self.filter_func = warnings.simplefilter
|
||
|
|
super().__init__()
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.catch_warnings = warnings.catch_warnings()
|
||
|
|
self.catch_warnings.__enter__()
|
||
|
|
self.filter_func('ignore', **self.ignore_kwargs)
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
self.catch_warnings.__exit__(*sys.exc_info())
|
||
|
|
|
||
|
|
|
||
|
|
# On OSes that don't provide tzset (Windows), we can't set the timezone
|
||
|
|
# in which the program runs. As a consequence, we must skip tests that
|
||
|
|
# don't enforce a specific timezone (with timezone.override or equivalent),
|
||
|
|
# or attempt to interpret naive datetimes in the default timezone.
|
||
|
|
|
||
|
|
requires_tz_support = skipUnless(
|
||
|
|
TZ_SUPPORT,
|
||
|
|
"This test relies on the ability to run a program in an arbitrary "
|
||
|
|
"time zone, but your operating system isn't able to do that."
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
@contextmanager
|
||
|
|
def extend_sys_path(*paths):
|
||
|
|
"""Context manager to temporarily add paths to sys.path."""
|
||
|
|
_orig_sys_path = sys.path[:]
|
||
|
|
sys.path.extend(paths)
|
||
|
|
try:
|
||
|
|
yield
|
||
|
|
finally:
|
||
|
|
sys.path = _orig_sys_path
|
||
|
|
|
||
|
|
|
||
|
|
@contextmanager
|
||
|
|
def isolate_lru_cache(lru_cache_object):
|
||
|
|
"""Clear the cache of an LRU cache object on entering and exiting."""
|
||
|
|
lru_cache_object.cache_clear()
|
||
|
|
try:
|
||
|
|
yield
|
||
|
|
finally:
|
||
|
|
lru_cache_object.cache_clear()
|
||
|
|
|
||
|
|
|
||
|
|
@contextmanager
|
||
|
|
def captured_output(stream_name):
|
||
|
|
"""Return a context manager used by captured_stdout/stdin/stderr
|
||
|
|
that temporarily replaces the sys stream *stream_name* with a StringIO.
|
||
|
|
|
||
|
|
Note: This function and the following ``captured_std*`` are copied
|
||
|
|
from CPython's ``test.support`` module."""
|
||
|
|
orig_stdout = getattr(sys, stream_name)
|
||
|
|
setattr(sys, stream_name, StringIO())
|
||
|
|
try:
|
||
|
|
yield getattr(sys, stream_name)
|
||
|
|
finally:
|
||
|
|
setattr(sys, stream_name, orig_stdout)
|
||
|
|
|
||
|
|
|
||
|
|
def captured_stdout():
|
||
|
|
"""Capture the output of sys.stdout:
|
||
|
|
|
||
|
|
with captured_stdout() as stdout:
|
||
|
|
print("hello")
|
||
|
|
self.assertEqual(stdout.getvalue(), "hello\n")
|
||
|
|
"""
|
||
|
|
return captured_output("stdout")
|
||
|
|
|
||
|
|
|
||
|
|
def captured_stderr():
|
||
|
|
"""Capture the output of sys.stderr:
|
||
|
|
|
||
|
|
with captured_stderr() as stderr:
|
||
|
|
print("hello", file=sys.stderr)
|
||
|
|
self.assertEqual(stderr.getvalue(), "hello\n")
|
||
|
|
"""
|
||
|
|
return captured_output("stderr")
|
||
|
|
|
||
|
|
|
||
|
|
def captured_stdin():
|
||
|
|
"""Capture the input to sys.stdin:
|
||
|
|
|
||
|
|
with captured_stdin() as stdin:
|
||
|
|
stdin.write('hello\n')
|
||
|
|
stdin.seek(0)
|
||
|
|
# call test code that consumes from sys.stdin
|
||
|
|
captured = input()
|
||
|
|
self.assertEqual(captured, "hello")
|
||
|
|
"""
|
||
|
|
return captured_output("stdin")
|
||
|
|
|
||
|
|
|
||
|
|
@contextmanager
|
||
|
|
def freeze_time(t):
|
||
|
|
"""
|
||
|
|
Context manager to temporarily freeze time.time(). This temporarily
|
||
|
|
modifies the time function of the time module. Modules which import the
|
||
|
|
time function directly (e.g. `from time import time`) won't be affected
|
||
|
|
This isn't meant as a public API, but helps reduce some repetitive code in
|
||
|
|
Django's test suite.
|
||
|
|
"""
|
||
|
|
_real_time = time.time
|
||
|
|
time.time = lambda: t
|
||
|
|
try:
|
||
|
|
yield
|
||
|
|
finally:
|
||
|
|
time.time = _real_time
|
||
|
|
|
||
|
|
|
||
|
|
def require_jinja2(test_func):
|
||
|
|
"""
|
||
|
|
Decorator to enable a Jinja2 template engine in addition to the regular
|
||
|
|
Django template engine for a test or skip it if Jinja2 isn't available.
|
||
|
|
"""
|
||
|
|
test_func = skipIf(jinja2 is None, "this test requires jinja2")(test_func)
|
||
|
|
return override_settings(TEMPLATES=[{
|
||
|
|
'BACKEND': 'django.template.backends.django.DjangoTemplates',
|
||
|
|
'APP_DIRS': True,
|
||
|
|
}, {
|
||
|
|
'BACKEND': 'django.template.backends.jinja2.Jinja2',
|
||
|
|
'APP_DIRS': True,
|
||
|
|
'OPTIONS': {'keep_trailing_newline': True},
|
||
|
|
}])(test_func)
|
||
|
|
|
||
|
|
|
||
|
|
class override_script_prefix(TestContextDecorator):
|
||
|
|
"""Decorator or context manager to temporary override the script prefix."""
|
||
|
|
def __init__(self, prefix):
|
||
|
|
self.prefix = prefix
|
||
|
|
super().__init__()
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.old_prefix = get_script_prefix()
|
||
|
|
set_script_prefix(self.prefix)
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
set_script_prefix(self.old_prefix)
|
||
|
|
|
||
|
|
|
||
|
|
class LoggingCaptureMixin:
|
||
|
|
"""
|
||
|
|
Capture the output from the 'django' logger and store it on the class's
|
||
|
|
logger_output attribute.
|
||
|
|
"""
|
||
|
|
def setUp(self):
|
||
|
|
self.logger = logging.getLogger('django')
|
||
|
|
self.old_stream = self.logger.handlers[0].stream
|
||
|
|
self.logger_output = StringIO()
|
||
|
|
self.logger.handlers[0].stream = self.logger_output
|
||
|
|
|
||
|
|
def tearDown(self):
|
||
|
|
self.logger.handlers[0].stream = self.old_stream
|
||
|
|
|
||
|
|
|
||
|
|
class isolate_apps(TestContextDecorator):
|
||
|
|
"""
|
||
|
|
Act as either a decorator or a context manager to register models defined
|
||
|
|
in its wrapped context to an isolated registry.
|
||
|
|
|
||
|
|
The list of installed apps the isolated registry should contain must be
|
||
|
|
passed as arguments.
|
||
|
|
|
||
|
|
Two optional keyword arguments can be specified:
|
||
|
|
|
||
|
|
`attr_name`: attribute assigned the isolated registry if used as a class
|
||
|
|
decorator.
|
||
|
|
|
||
|
|
`kwarg_name`: keyword argument passing the isolated registry if used as a
|
||
|
|
function decorator.
|
||
|
|
"""
|
||
|
|
def __init__(self, *installed_apps, **kwargs):
|
||
|
|
self.installed_apps = installed_apps
|
||
|
|
super().__init__(**kwargs)
|
||
|
|
|
||
|
|
def enable(self):
|
||
|
|
self.old_apps = Options.default_apps
|
||
|
|
apps = Apps(self.installed_apps)
|
||
|
|
setattr(Options, 'default_apps', apps)
|
||
|
|
return apps
|
||
|
|
|
||
|
|
def disable(self):
|
||
|
|
setattr(Options, 'default_apps', self.old_apps)
|
||
|
|
|
||
|
|
|
||
|
|
def tag(*tags):
|
||
|
|
"""Decorator to add tags to a test class or method."""
|
||
|
|
def decorator(obj):
|
||
|
|
if hasattr(obj, 'tags'):
|
||
|
|
obj.tags = obj.tags.union(tags)
|
||
|
|
else:
|
||
|
|
setattr(obj, 'tags', set(tags))
|
||
|
|
return obj
|
||
|
|
return decorator
|
||
|
|
|
||
|
|
|
||
|
|
@contextmanager
|
||
|
|
def register_lookup(field, *lookups, lookup_name=None):
|
||
|
|
"""
|
||
|
|
Context manager to temporarily register lookups on a model field using
|
||
|
|
lookup_name (or the lookup's lookup_name if not provided).
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
for lookup in lookups:
|
||
|
|
field.register_lookup(lookup, lookup_name)
|
||
|
|
yield
|
||
|
|
finally:
|
||
|
|
for lookup in lookups:
|
||
|
|
field._unregister_lookup(lookup, lookup_name)
|