from __future__ import unicode_literals from collections import Counter from copy import copy import difflib import errno from functools import wraps import json import os import posixpath import re import socket import sys import threading import unittest import warnings from unittest import skipIf # NOQA: Imported here for backward compatibility from unittest.util import safe_repr from django.apps import apps from django.conf import settings from django.core import mail from django.core.exceptions import ValidationError, ImproperlyConfigured from django.core.handlers.wsgi import get_path_info, WSGIHandler from django.core.management import call_command from django.core.management.color import no_style from django.core.management.commands import flush from django.core.servers.basehttp import WSGIRequestHandler, WSGIServer from django.core.urlresolvers import clear_url_caches, set_urlconf from django.db import connection, connections, DEFAULT_DB_ALIAS, transaction from django.forms.fields import CharField from django.http import QueryDict from django.test.client import Client from django.test.html import HTMLParseError, parse_html from django.test.signals import setting_changed, template_rendered from django.test.utils import (CaptureQueriesContext, ContextList, override_settings, modify_settings, compare_xml) from django.utils.deprecation import RemovedInDjango20Warning from django.utils.encoding import force_text from django.utils import six from django.utils.six.moves.urllib.parse import urlsplit, urlunsplit, urlparse, unquote from django.utils.six.moves.urllib.request import url2pathname from django.views.static import serve __all__ = ('TestCase', 'TransactionTestCase', 'SimpleTestCase', 'skipIfDBFeature', 'skipUnlessDBFeature') def to_list(value): """ Puts value into a list if it's not already one. Returns an empty list if value is None. """ if value is None: value = [] elif not isinstance(value, list): value = [value] return value def assert_and_parse_html(self, html, user_msg, msg): try: dom = parse_html(html) except HTMLParseError as e: standardMsg = '%s\n%s' % (msg, e.msg) self.fail(self._formatMessage(user_msg, standardMsg)) return dom class _AssertNumQueriesContext(CaptureQueriesContext): def __init__(self, test_case, num, connection): self.test_case = test_case self.num = num super(_AssertNumQueriesContext, self).__init__(connection) def __exit__(self, exc_type, exc_value, traceback): super(_AssertNumQueriesContext, self).__exit__(exc_type, exc_value, traceback) if exc_type is not None: return executed = len(self) self.test_case.assertEqual( executed, self.num, "%d queries executed, %d expected\nCaptured queries were:\n%s" % ( executed, self.num, '\n'.join( query['sql'] for query in self.captured_queries ) ) ) class _AssertTemplateUsedContext(object): def __init__(self, test_case, template_name): self.test_case = test_case self.template_name = template_name self.rendered_templates = [] self.rendered_template_names = [] self.context = ContextList() def on_template_render(self, sender, signal, template, context, **kwargs): self.rendered_templates.append(template) self.rendered_template_names.append(template.name) self.context.append(copy(context)) def test(self): return self.template_name in self.rendered_template_names def message(self): return '%s was not rendered.' % self.template_name def __enter__(self): template_rendered.connect(self.on_template_render) return self def __exit__(self, exc_type, exc_value, traceback): template_rendered.disconnect(self.on_template_render) if exc_type is not None: return if not self.test(): message = self.message() if len(self.rendered_templates) == 0: message += ' No template was rendered.' else: message += ' Following templates were rendered: %s' % ( ', '.join(self.rendered_template_names)) self.test_case.fail(message) class _AssertTemplateNotUsedContext(_AssertTemplateUsedContext): def test(self): return self.template_name not in self.rendered_template_names def message(self): return '%s was rendered.' % self.template_name class SimpleTestCase(unittest.TestCase): # The class we'll use for the test client self.client. # Can be overridden in derived classes. client_class = Client _overridden_settings = None _modified_settings = None @classmethod def setUpClass(cls): if cls._overridden_settings: cls._cls_overridden_context = override_settings(**cls._overridden_settings) cls._cls_overridden_context.enable() if cls._modified_settings: cls._cls_modified_context = modify_settings(cls._modified_settings) cls._cls_modified_context.enable() @classmethod def tearDownClass(cls): if hasattr(cls, '_cls_modified_context'): cls._cls_modified_context.disable() delattr(cls, '_cls_modified_context') if hasattr(cls, '_cls_overridden_context'): cls._cls_overridden_context.disable() delattr(cls, '_cls_overridden_context') def __call__(self, result=None): """ Wrapper around default __call__ method to perform common Django test set up. This means that user-defined Test Cases aren't required to include a call to super().setUp(). """ testMethod = getattr(self, self._testMethodName) skipped = (getattr(self.__class__, "__unittest_skip__", False) or getattr(testMethod, "__unittest_skip__", False)) if not skipped: try: self._pre_setup() except Exception: result.addError(self, sys.exc_info()) return super(SimpleTestCase, self).__call__(result) if not skipped: try: self._post_teardown() except Exception: result.addError(self, sys.exc_info()) return def _pre_setup(self): """Performs any pre-test setup. This includes: * Creating a test client. * If the class has a 'urls' attribute, replace ROOT_URLCONF with it. * Clearing the mail test outbox. """ self.client = self.client_class() self._urlconf_setup() mail.outbox = [] def _urlconf_setup(self): if hasattr(self, 'urls'): warnings.warn( "SimpleTestCase.urls is deprecated and will be removed in " "Django 2.0. Use @override_settings(ROOT_URLCONF=...) " "in %s instead." % self.__class__.__name__, RemovedInDjango20Warning, stacklevel=2) set_urlconf(None) self._old_root_urlconf = settings.ROOT_URLCONF settings.ROOT_URLCONF = self.urls clear_url_caches() def _post_teardown(self): """Performs any post-test things. This includes: * Putting back the original ROOT_URLCONF if it was changed. """ self._urlconf_teardown() def _urlconf_teardown(self): if hasattr(self, '_old_root_urlconf'): set_urlconf(None) settings.ROOT_URLCONF = self._old_root_urlconf clear_url_caches() def settings(self, **kwargs): """ A context manager that temporarily sets a setting and reverts to the original value when exiting the context. """ return override_settings(**kwargs) def modify_settings(self, **kwargs): """ A context manager that temporarily applies changes a list setting and reverts back to the original value when exiting the context. """ return modify_settings(**kwargs) def assertRedirects(self, response, expected_url, status_code=302, target_status_code=200, host=None, msg_prefix='', fetch_redirect_response=True): """Asserts that a response redirected to a specific URL, and that the redirect URL can be loaded. Note that assertRedirects won't work for external links since it uses TestClient to do a request (use fetch_redirect_response=False to check such links without fetching them). """ if msg_prefix: msg_prefix += ": " e_scheme, e_netloc, e_path, e_query, e_fragment = urlsplit(expected_url) if hasattr(response, 'redirect_chain'): # The request was a followed redirect self.assertTrue(len(response.redirect_chain) > 0, msg_prefix + "Response didn't redirect as expected: Response" " code was %d (expected %d)" % (response.status_code, status_code)) self.assertEqual(response.redirect_chain[0][1], status_code, msg_prefix + "Initial response didn't redirect as expected:" " Response code was %d (expected %d)" % (response.redirect_chain[0][1], status_code)) url, status_code = response.redirect_chain[-1] scheme, netloc, path, query, fragment = urlsplit(url) self.assertEqual(response.status_code, target_status_code, msg_prefix + "Response didn't redirect as expected: Final" " Response code was %d (expected %d)" % (response.status_code, target_status_code)) else: # Not a followed redirect self.assertEqual(response.status_code, status_code, msg_prefix + "Response didn't redirect as expected: Response" " code was %d (expected %d)" % (response.status_code, status_code)) url = response.url scheme, netloc, path, query, fragment = urlsplit(url) if fetch_redirect_response: redirect_response = response.client.get(path, QueryDict(query), secure=(scheme == 'https')) # Get the redirection page, using the same client that was used # to obtain the original response. self.assertEqual(redirect_response.status_code, target_status_code, msg_prefix + "Couldn't retrieve redirection page '%s':" " response code was %d (expected %d)" % (path, redirect_response.status_code, target_status_code)) e_scheme = e_scheme if e_scheme else scheme or 'http' e_netloc = e_netloc if e_netloc else host or 'testserver' expected_url = urlunsplit((e_scheme, e_netloc, e_path, e_query, e_fragment)) self.assertEqual(url, expected_url, msg_prefix + "Response redirected to '%s', expected '%s'" % (url, expected_url)) def _assert_contains(self, response, text, status_code, msg_prefix, html): # If the response supports deferred rendering and hasn't been rendered # yet, then ensure that it does get rendered before proceeding further. if (hasattr(response, 'render') and callable(response.render) and not response.is_rendered): response.render() if msg_prefix: msg_prefix += ": " self.assertEqual(response.status_code, status_code, msg_prefix + "Couldn't retrieve content: Response code was %d" " (expected %d)" % (response.status_code, status_code)) if response.streaming: content = b''.join(response.streaming_content) else: content = response.content if not isinstance(text, bytes) or html: text = force_text(text, encoding=response.charset) content = content.decode(response.charset) text_repr = "'%s'" % text else: text_repr = repr(text) if html: content = assert_and_parse_html(self, content, None, "Response's content is not valid HTML:") text = assert_and_parse_html(self, text, None, "Second argument is not valid HTML:") real_count = content.count(text) return (text_repr, real_count, msg_prefix) def assertContains(self, response, text, count=None, status_code=200, msg_prefix='', html=False): """ Asserts that a response indicates that some content was retrieved successfully, (i.e., the HTTP status code was as expected), and that ``text`` occurs ``count`` times in the content of the response. If ``count`` is None, the count doesn't matter - the assertion is true if the text occurs at least once in the response. """ text_repr, real_count, msg_prefix = self._assert_contains( response, text, status_code, msg_prefix, html) if count is not None: self.assertEqual(real_count, count, msg_prefix + "Found %d instances of %s in response" " (expected %d)" % (real_count, text_repr, count)) else: self.assertTrue(real_count != 0, msg_prefix + "Couldn't find %s in response" % text_repr) def assertNotContains(self, response, text, status_code=200, msg_prefix='', html=False): """ Asserts that a response indicates that some content was retrieved successfully, (i.e., the HTTP status code was as expected), and that ``text`` doesn't occurs in the content of the response. """ text_repr, real_count, msg_prefix = self._assert_contains( response, text, status_code, msg_prefix, html) self.assertEqual(real_count, 0, msg_prefix + "Response should not contain %s" % text_repr) def assertFormError(self, response, form, field, errors, msg_prefix=''): """ Asserts that a form used to render the response has a specific field error. """ if msg_prefix: msg_prefix += ": " # Put context(s) into a list to simplify processing. contexts = to_list(response.context) if not contexts: self.fail(msg_prefix + "Response did not use any contexts to " "render the response") # Put error(s) into a list to simplify processing. errors = to_list(errors) # Search all contexts for the error. found_form = False for i, context in enumerate(contexts): if form not in context: continue found_form = True for err in errors: if field: if field in context[form].errors: field_errors = context[form].errors[field] self.assertTrue(err in field_errors, msg_prefix + "The field '%s' on form '%s' in" " context %d does not contain the error '%s'" " (actual errors: %s)" % (field, form, i, err, repr(field_errors))) elif field in context[form].fields: self.fail(msg_prefix + "The field '%s' on form '%s'" " in context %d contains no errors" % (field, form, i)) else: self.fail(msg_prefix + "The form '%s' in context %d" " does not contain the field '%s'" % (form, i, field)) else: non_field_errors = context[form].non_field_errors() self.assertTrue(err in non_field_errors, msg_prefix + "The form '%s' in context %d does not" " contain the non-field error '%s'" " (actual errors: %s)" % (form, i, err, non_field_errors)) if not found_form: self.fail(msg_prefix + "The form '%s' was not used to render the" " response" % form) def assertFormsetError(self, response, formset, form_index, field, errors, msg_prefix=''): """ Asserts that a formset used to render the response has a specific error. For field errors, specify the ``form_index`` and the ``field``. For non-field errors, specify the ``form_index`` and the ``field`` as None. For non-form errors, specify ``form_index`` as None and the ``field`` as None. """ # Add punctuation to msg_prefix if msg_prefix: msg_prefix += ": " # Put context(s) into a list to simplify processing. contexts = to_list(response.context) if not contexts: self.fail(msg_prefix + 'Response did not use any contexts to ' 'render the response') # Put error(s) into a list to simplify processing. errors = to_list(errors) # Search all contexts for the error. found_formset = False for i, context in enumerate(contexts): if formset not in context: continue found_formset = True for err in errors: if field is not None: if field in context[formset].forms[form_index].errors: field_errors = context[formset].forms[form_index].errors[field] self.assertTrue(err in field_errors, msg_prefix + "The field '%s' on formset '%s', " "form %d in context %d does not contain the " "error '%s' (actual errors: %s)" % (field, formset, form_index, i, err, repr(field_errors))) elif field in context[formset].forms[form_index].fields: self.fail(msg_prefix + "The field '%s' " "on formset '%s', form %d in " "context %d contains no errors" % (field, formset, form_index, i)) else: self.fail(msg_prefix + "The formset '%s', form %d in " "context %d does not contain the field '%s'" % (formset, form_index, i, field)) elif form_index is not None: non_field_errors = context[formset].forms[form_index].non_field_errors() self.assertFalse(len(non_field_errors) == 0, msg_prefix + "The formset '%s', form %d in " "context %d does not contain any non-field " "errors." % (formset, form_index, i)) self.assertTrue(err in non_field_errors, msg_prefix + "The formset '%s', form %d " "in context %d does not contain the " "non-field error '%s' " "(actual errors: %s)" % (formset, form_index, i, err, repr(non_field_errors))) else: non_form_errors = context[formset].non_form_errors() self.assertFalse(len(non_form_errors) == 0, msg_prefix + "The formset '%s' in " "context %d does not contain any " "non-form errors." % (formset, i)) self.assertTrue(err in non_form_errors, msg_prefix + "The formset '%s' in context " "%d does not contain the " "non-form error '%s' (actual errors: %s)" % (formset, i, err, repr(non_form_errors))) if not found_formset: self.fail(msg_prefix + "The formset '%s' was not used to render " "the response" % formset) def _assert_template_used(self, response, template_name, msg_prefix): if response is None and template_name is None: raise TypeError('response and/or template_name argument must be provided') if msg_prefix: msg_prefix += ": " if template_name is not None and response is not None and not hasattr(response, 'templates'): raise ValueError( "assertTemplateUsed() and assertTemplateNotUsed() are only " "usable on responses fetched using the Django test Client." ) if not hasattr(response, 'templates') or (response is None and template_name): if response: template_name = response response = None # use this template with context manager return template_name, None, msg_prefix template_names = [t.name for t in response.templates if t.name is not None] return None, template_names, msg_prefix def assertTemplateUsed(self, response=None, template_name=None, msg_prefix='', count=None): """ Asserts that the template with the provided name was used in rendering the response. Also usable as context manager. """ context_mgr_template, template_names, msg_prefix = self._assert_template_used( response, template_name, msg_prefix) if context_mgr_template: # Use assertTemplateUsed as context manager. return _AssertTemplateUsedContext(self, context_mgr_template) if not template_names: self.fail(msg_prefix + "No templates used to render the response") self.assertTrue(template_name in template_names, msg_prefix + "Template '%s' was not a template used to render" " the response. Actual template(s) used: %s" % (template_name, ', '.join(template_names))) if count is not None: self.assertEqual(template_names.count(template_name), count, msg_prefix + "Template '%s' was expected to be rendered %d " "time(s) but was actually rendered %d time(s)." % (template_name, count, template_names.count(template_name))) def assertTemplateNotUsed(self, response=None, template_name=None, msg_prefix=''): """ Asserts that the template with the provided name was NOT used in rendering the response. Also usable as context manager. """ context_mgr_template, template_names, msg_prefix = self._assert_template_used( response, template_name, msg_prefix) if context_mgr_template: # Use assertTemplateNotUsed as context manager. return _AssertTemplateNotUsedContext(self, context_mgr_template) self.assertFalse(template_name in template_names, msg_prefix + "Template '%s' was used unexpectedly in rendering" " the response" % template_name) def assertRaisesMessage(self, expected_exception, expected_message, callable_obj=None, *args, **kwargs): """ Asserts that the message in a raised exception matches the passed value. Args: expected_exception: Exception class expected to be raised. expected_message: expected error message string value. callable_obj: Function to be called. args: Extra args. kwargs: Extra kwargs. """ return six.assertRaisesRegex(self, expected_exception, re.escape(expected_message), callable_obj, *args, **kwargs) def assertFieldOutput(self, fieldclass, valid, invalid, field_args=None, field_kwargs=None, empty_value=''): """ Asserts that a form field behaves correctly with various inputs. Args: fieldclass: the class of the field to be tested. valid: a dictionary mapping valid inputs to their expected cleaned values. invalid: a dictionary mapping invalid inputs to one or more raised error messages. field_args: the args passed to instantiate the field field_kwargs: the kwargs passed to instantiate the field empty_value: the expected clean output for inputs in empty_values """ if field_args is None: field_args = [] if field_kwargs is None: field_kwargs = {} required = fieldclass(*field_args, **field_kwargs) optional = fieldclass(*field_args, **dict(field_kwargs, required=False)) # test valid inputs for input, output in valid.items(): self.assertEqual(required.clean(input), output) self.assertEqual(optional.clean(input), output) # test invalid inputs for input, errors in invalid.items(): with self.assertRaises(ValidationError) as context_manager: required.clean(input) self.assertEqual(context_manager.exception.messages, errors) with self.assertRaises(ValidationError) as context_manager: optional.clean(input) self.assertEqual(context_manager.exception.messages, errors) # test required inputs error_required = [force_text(required.error_messages['required'])] for e in required.empty_values: with self.assertRaises(ValidationError) as context_manager: required.clean(e) self.assertEqual(context_manager.exception.messages, error_required) self.assertEqual(optional.clean(e), empty_value) # test that max_length and min_length are always accepted if issubclass(fieldclass, CharField): field_kwargs.update({'min_length': 2, 'max_length': 20}) self.assertIsInstance(fieldclass(*field_args, **field_kwargs), fieldclass) def assertHTMLEqual(self, html1, html2, msg=None): """ Asserts that two HTML snippets are semantically the same. Whitespace in most cases is ignored, and attribute ordering is not significant. The passed-in arguments must be valid HTML. """ dom1 = assert_and_parse_html(self, html1, msg, 'First argument is not valid HTML:') dom2 = assert_and_parse_html(self, html2, msg, 'Second argument is not valid HTML:') if dom1 != dom2: standardMsg = '%s != %s' % ( safe_repr(dom1, True), safe_repr(dom2, True)) diff = ('\n' + '\n'.join(difflib.ndiff( six.text_type(dom1).splitlines(), six.text_type(dom2).splitlines()))) standardMsg = self._truncateMessage(standardMsg, diff) self.fail(self._formatMessage(msg, standardMsg)) def assertHTMLNotEqual(self, html1, html2, msg=None): """Asserts that two HTML snippets are not semantically equivalent.""" dom1 = assert_and_parse_html(self, html1, msg, 'First argument is not valid HTML:') dom2 = assert_and_parse_html(self, html2, msg, 'Second argument is not valid HTML:') if dom1 == dom2: standardMsg = '%s == %s' % ( safe_repr(dom1, True), safe_repr(dom2, True)) self.fail(self._formatMessage(msg, standardMsg)) def assertInHTML(self, needle, haystack, count=None, msg_prefix=''): needle = assert_and_parse_html(self, needle, None, 'First argument is not valid HTML:') haystack = assert_and_parse_html(self, haystack, None, 'Second argument is not valid HTML:') real_count = haystack.count(needle) if count is not None: self.assertEqual(real_count, count, msg_prefix + "Found %d instances of '%s' in response" " (expected %d)" % (real_count, needle, count)) else: self.assertTrue(real_count != 0, msg_prefix + "Couldn't find '%s' in response" % needle) def assertJSONEqual(self, raw, expected_data, msg=None): """ Asserts that the JSON fragments raw and expected_data are equal. Usual JSON non-significant whitespace rules apply as the heavyweight is delegated to the json library. """ try: data = json.loads(raw) except ValueError: self.fail("First argument is not valid JSON: %r" % raw) if isinstance(expected_data, six.string_types): try: expected_data = json.loads(expected_data) except ValueError: self.fail("Second argument is not valid JSON: %r" % expected_data) self.assertEqual(data, expected_data, msg=msg) def assertJSONNotEqual(self, raw, expected_data, msg=None): """ Asserts that the JSON fragments raw and expected_data are not equal. Usual JSON non-significant whitespace rules apply as the heavyweight is delegated to the json library. """ try: data = json.loads(raw) except ValueError: self.fail("First argument is not valid JSON: %r" % raw) if isinstance(expected_data, six.string_types): try: expected_data = json.loads(expected_data) except ValueError: self.fail("Second argument is not valid JSON: %r" % expected_data) self.assertNotEqual(data, expected_data, msg=msg) def assertXMLEqual(self, xml1, xml2, msg=None): """ Asserts that two XML snippets are semantically the same. Whitespace in most cases is ignored, and attribute ordering is not significant. The passed-in arguments must be valid XML. """ try: result = compare_xml(xml1, xml2) except Exception as e: standardMsg = 'First or second argument is not valid XML\n%s' % e self.fail(self._formatMessage(msg, standardMsg)) else: if not result: standardMsg = '%s != %s' % (safe_repr(xml1, True), safe_repr(xml2, True)) self.fail(self._formatMessage(msg, standardMsg)) def assertXMLNotEqual(self, xml1, xml2, msg=None): """ Asserts that two XML snippets are not semantically equivalent. Whitespace in most cases is ignored, and attribute ordering is not significant. The passed-in arguments must be valid XML. """ try: result = compare_xml(xml1, xml2) except Exception as e: standardMsg = 'First or second argument is not valid XML\n%s' % e self.fail(self._formatMessage(msg, standardMsg)) else: if result: standardMsg = '%s == %s' % (safe_repr(xml1, True), safe_repr(xml2, True)) self.fail(self._formatMessage(msg, standardMsg)) class TransactionTestCase(SimpleTestCase): # Subclasses can ask for resetting of auto increment sequence before each # test case reset_sequences = False # Subclasses can enable only a subset of apps for faster tests available_apps = None # Subclasses can define fixtures which will be automatically installed. fixtures = None # If transactions aren't available, Django will serialize the database # contents into a fixture during setup and flush and reload them # during teardown (as flush does not restore data from migrations). # This can be slow; this flag allows enabling on a per-case basis. serialized_rollback = False def _pre_setup(self): """Performs any pre-test setup. This includes: * If the class has an 'available_apps' attribute, restricting the app registry to these applications, then firing post_migrate -- it must run with the correct set of applications for the test case. * If the class has a 'fixtures' attribute, installing these fixtures. """ super(TransactionTestCase, self)._pre_setup() if self.available_apps is not None: apps.set_available_apps(self.available_apps) setting_changed.send(sender=settings._wrapped.__class__, setting='INSTALLED_APPS', value=self.available_apps, enter=True) for db_name in self._databases_names(include_mirrors=False): flush.Command.emit_post_migrate(verbosity=0, interactive=False, database=db_name) try: self._fixture_setup() except Exception: if self.available_apps is not None: apps.unset_available_apps() setting_changed.send(sender=settings._wrapped.__class__, setting='INSTALLED_APPS', value=settings.INSTALLED_APPS, enter=False) raise @classmethod def _databases_names(cls, include_mirrors=True): # If the test case has a multi_db=True flag, act on all databases, # including mirrors or not. Otherwise, just on the default DB. if getattr(cls, 'multi_db', False): return [alias for alias in connections if include_mirrors or not connections[alias].settings_dict['TEST']['MIRROR']] else: return [DEFAULT_DB_ALIAS] def _reset_sequences(self, db_name): conn = connections[db_name] if conn.features.supports_sequence_reset: sql_list = conn.ops.sequence_reset_by_name_sql( no_style(), conn.introspection.sequence_list()) if sql_list: with transaction.atomic(using=db_name): cursor = conn.cursor() for sql in sql_list: cursor.execute(sql) def _fixture_setup(self): for db_name in self._databases_names(include_mirrors=False): # Reset sequences if self.reset_sequences: self._reset_sequences(db_name) # If we need to provide replica initial data from migrated apps, # then do so. if self.serialized_rollback and hasattr(connections[db_name], "_test_serialized_contents"): if self.available_apps is not None: apps.unset_available_apps() connections[db_name].creation.deserialize_db_from_string( connections[db_name]._test_serialized_contents ) if self.available_apps is not None: apps.set_available_apps(self.available_apps) if self.fixtures: # We have to use this slightly awkward syntax due to the fact # that we're using *args and **kwargs together. call_command('loaddata', *self.fixtures, **{'verbosity': 0, 'database': db_name}) def _should_reload_connections(self): return True def _post_teardown(self): """Performs any post-test things. This includes: * Flushing the contents of the database, to leave a clean slate. If the class has an 'available_apps' attribute, post_migrate isn't fired. * Force-closing the connection, so the next test gets a clean cursor. """ try: self._fixture_teardown() super(TransactionTestCase, self)._post_teardown() if self._should_reload_connections(): # Some DB cursors include SQL statements as part of cursor # creation. If you have a test that does a rollback, the effect # of these statements is lost, which can affect the operation of # tests (e.g., losing a timezone setting causing objects to be # created with the wrong time). To make sure this doesn't # happen, get a clean connection at the start of every test. for conn in connections.all(): conn.close() finally: if self.available_apps is not None: apps.unset_available_apps() setting_changed.send(sender=settings._wrapped.__class__, setting='INSTALLED_APPS', value=settings.INSTALLED_APPS, enter=False) def _fixture_teardown(self): # Allow TRUNCATE ... CASCADE and don't emit the post_migrate signal # when flushing only a subset of the apps for db_name in self._databases_names(include_mirrors=False): # Flush the database call_command('flush', verbosity=0, interactive=False, database=db_name, reset_sequences=False, allow_cascade=self.available_apps is not None, inhibit_post_migrate=self.available_apps is not None) def assertQuerysetEqual(self, qs, values, transform=repr, ordered=True, msg=None): items = six.moves.map(transform, qs) if not ordered: return self.assertEqual(Counter(items), Counter(values), msg=msg) values = list(values) # For example qs.iterator() could be passed as qs, but it does not # have 'ordered' attribute. if len(values) > 1 and hasattr(qs, 'ordered') and not qs.ordered: raise ValueError("Trying to compare non-ordered queryset " "against more than one ordered values") return self.assertEqual(list(items), values, msg=msg) def assertNumQueries(self, num, func=None, *args, **kwargs): using = kwargs.pop("using", DEFAULT_DB_ALIAS) conn = connections[using] context = _AssertNumQueriesContext(self, num, conn) if func is None: return context with context: func(*args, **kwargs) def connections_support_transactions(): """ Returns True if all connections support transactions. """ return all(conn.features.supports_transactions for conn in connections.all()) class TestCase(TransactionTestCase): """ Similar to TransactionTestCase, but uses `transaction.atomic()` to achieve test isolation. In most situation, TestCase should be prefered to TransactionTestCase as it allows faster execution. However, there are some situations where using TransactionTestCase might be necessary (e.g. testing some transactional behavior). On database backends with no transaction support, TestCase behaves as TransactionTestCase. """ @classmethod def _enter_atomics(cls): """Helper method to open atomic blocks for multiple databases""" atomics = {} for db_name in cls._databases_names(): atomics[db_name] = transaction.atomic(using=db_name) atomics[db_name].__enter__() return atomics @classmethod def _rollback_atomics(cls, atomics): """Rollback atomic blocks opened through the previous method""" for db_name in reversed(cls._databases_names()): transaction.set_rollback(True, using=db_name) atomics[db_name].__exit__(None, None, None) @classmethod def setUpClass(cls): super(TestCase, cls).setUpClass() if not connections_support_transactions(): return cls.cls_atomics = cls._enter_atomics() if cls.fixtures: for db_name in cls._databases_names(include_mirrors=False): try: call_command('loaddata', *cls.fixtures, **{ 'verbosity': 0, 'commit': False, 'database': db_name, }) except Exception: cls._rollback_atomics(cls.cls_atomics) raise cls.setUpTestData() @classmethod def tearDownClass(cls): if connections_support_transactions(): cls._rollback_atomics(cls.cls_atomics) for conn in connections.all(): conn.close() super(TestCase, cls).tearDownClass() @classmethod def setUpTestData(cls): """Load initial data for the TestCase""" pass def _should_reload_connections(self): if connections_support_transactions(): return False return super(TestCase, self)._should_reload_connections() def _fixture_setup(self): if not connections_support_transactions(): # If the backend does not support transactions, we should reload # class data before each test self.setUpTestData() return super(TestCase, self)._fixture_setup() assert not self.reset_sequences, 'reset_sequences cannot be used on TestCase instances' self.atomics = self._enter_atomics() def _fixture_teardown(self): if not connections_support_transactions(): return super(TestCase, self)._fixture_teardown() self._rollback_atomics(self.atomics) class CheckCondition(object): """Descriptor class for deferred condition checking""" def __init__(self, cond_func): self.cond_func = cond_func def __get__(self, obj, objtype): return self.cond_func() def _deferredSkip(condition, reason): def decorator(test_func): if not (isinstance(test_func, type) and issubclass(test_func, unittest.TestCase)): @wraps(test_func) def skip_wrapper(*args, **kwargs): if condition(): raise unittest.SkipTest(reason) return test_func(*args, **kwargs) test_item = skip_wrapper else: # Assume a class is decorated test_item = test_func test_item.__unittest_skip__ = CheckCondition(condition) test_item.__unittest_skip_why__ = reason return test_item return decorator def skipIfDBFeature(*features): """ Skip a test if a database has at least one of the named features. """ return _deferredSkip( lambda: any(getattr(connection.features, feature, False) for feature in features), "Database has feature(s) %s" % ", ".join(features) ) def skipUnlessDBFeature(*features): """ Skip a test unless a database has all the named features. """ return _deferredSkip( lambda: not all(getattr(connection.features, feature, False) for feature in features), "Database doesn't support feature(s): %s" % ", ".join(features) ) class QuietWSGIRequestHandler(WSGIRequestHandler): """ Just a regular WSGIRequestHandler except it doesn't log to the standard output any of the requests received, so as to not clutter the output for the tests' results. """ def log_message(*args): pass class FSFilesHandler(WSGIHandler): """ WSGI middleware that intercepts calls to a directory, as defined by one of the *_ROOT settings, and serves those files, publishing them under *_URL. """ def __init__(self, application): self.application = application self.base_url = urlparse(self.get_base_url()) super(FSFilesHandler, self).__init__() def _should_handle(self, path): """ Checks if the path should be handled. Ignores the path if: * the host is provided as part of the base_url * the request's path isn't under the media path (or equal) """ return path.startswith(self.base_url[2]) and not self.base_url[1] def file_path(self, url): """ Returns the relative path to the file on disk for the given URL. """ relative_url = url[len(self.base_url[2]):] return url2pathname(relative_url) def get_response(self, request): from django.http import Http404 if self._should_handle(request.path): try: return self.serve(request) except Http404: pass return super(FSFilesHandler, self).get_response(request) def serve(self, request): os_rel_path = self.file_path(request.path) os_rel_path = posixpath.normpath(unquote(os_rel_path)) # Emulate behavior of django.contrib.staticfiles.views.serve() when it # invokes staticfiles' finders functionality. # TODO: Modify if/when that internal API is refactored final_rel_path = os_rel_path.replace('\\', '/').lstrip('/') return serve(request, final_rel_path, document_root=self.get_base_dir()) def __call__(self, environ, start_response): if not self._should_handle(get_path_info(environ)): return self.application(environ, start_response) return super(FSFilesHandler, self).__call__(environ, start_response) class _StaticFilesHandler(FSFilesHandler): """ Handler for serving static files. A private class that is meant to be used solely as a convenience by LiveServerThread. """ def get_base_dir(self): return settings.STATIC_ROOT def get_base_url(self): return settings.STATIC_URL class _MediaFilesHandler(FSFilesHandler): """ Handler for serving the media files. A private class that is meant to be used solely as a convenience by LiveServerThread. """ def get_base_dir(self): return settings.MEDIA_ROOT def get_base_url(self): return settings.MEDIA_URL class LiveServerThread(threading.Thread): """ Thread for running a live http server while the tests are running. """ def __init__(self, host, possible_ports, static_handler, connections_override=None): self.host = host self.port = None self.possible_ports = possible_ports self.is_ready = threading.Event() self.error = None self.static_handler = static_handler self.connections_override = connections_override super(LiveServerThread, self).__init__() def run(self): """ Sets up the live server and databases, and then loops over handling http requests. """ if self.connections_override: # Override this thread's database connections with the ones # provided by the main thread. for alias, conn in self.connections_override.items(): connections[alias] = conn try: # Create the handler for serving static and media files handler = self.static_handler(_MediaFilesHandler(WSGIHandler())) # Go through the list of possible ports, hoping that we can find # one that is free to use for the WSGI server. for index, port in enumerate(self.possible_ports): try: self.httpd = WSGIServer( (self.host, port), QuietWSGIRequestHandler) except socket.error as e: if (index + 1 < len(self.possible_ports) and e.errno == errno.EADDRINUSE): # This port is already in use, so we go on and try with # the next one in the list. continue else: # Either none of the given ports are free or the error # is something else than "Address already in use". So # we let that error bubble up to the main thread. raise else: # A free port was found. self.port = port break self.httpd.set_app(handler) self.is_ready.set() self.httpd.serve_forever() except Exception as e: self.error = e self.is_ready.set() def terminate(self): if hasattr(self, 'httpd'): # Stop the WSGI server self.httpd.shutdown() self.httpd.server_close() class LiveServerTestCase(TransactionTestCase): """ Does basically the same as TransactionTestCase but also launches a live http server in a separate thread so that the tests may use another testing framework, such as Selenium for example, instead of the built-in dummy client. Note that it inherits from TransactionTestCase instead of TestCase because the threads do not share the same transactions (unless if using in-memory sqlite) and each thread needs to commit all their transactions so that the other thread can see the changes. """ static_handler = _StaticFilesHandler @property def live_server_url(self): return 'http://%s:%s' % ( self.server_thread.host, self.server_thread.port) @classmethod def setUpClass(cls): super(LiveServerTestCase, cls).setUpClass() connections_override = {} for conn in connections.all(): # If using in-memory sqlite databases, pass the connections to # the server thread. if conn.vendor == 'sqlite' and conn.is_in_memory_db(conn.settings_dict['NAME']): # Explicitly enable thread-shareability for this connection conn.allow_thread_sharing = True connections_override[conn.alias] = conn # Launch the live server's thread specified_address = os.environ.get( 'DJANGO_LIVE_TEST_SERVER_ADDRESS', 'localhost:8081') # The specified ports may be of the form '8000-8010,8080,9200-9300' # i.e. a comma-separated list of ports or ranges of ports, so we break # it down into a detailed list of all possible ports. possible_ports = [] try: host, port_ranges = specified_address.split(':') for port_range in port_ranges.split(','): # A port range can be of either form: '8000' or '8000-8010'. extremes = list(map(int, port_range.split('-'))) assert len(extremes) in [1, 2] if len(extremes) == 1: # Port range of the form '8000' possible_ports.append(extremes[0]) else: # Port range of the form '8000-8010' for port in range(extremes[0], extremes[1] + 1): possible_ports.append(port) except Exception: msg = 'Invalid address ("%s") for live server.' % specified_address six.reraise(ImproperlyConfigured, ImproperlyConfigured(msg), sys.exc_info()[2]) cls.server_thread = LiveServerThread(host, possible_ports, cls.static_handler, connections_override=connections_override) cls.server_thread.daemon = True cls.server_thread.start() # Wait for the live server to be ready cls.server_thread.is_ready.wait() if cls.server_thread.error: # Clean up behind ourselves, since tearDownClass won't get called in # case of errors. cls._tearDownClassInternal() raise cls.server_thread.error @classmethod def _tearDownClassInternal(cls): # There may not be a 'server_thread' attribute if setUpClass() for some # reasons has raised an exception. if hasattr(cls, 'server_thread'): # Terminate the live server's thread cls.server_thread.terminate() cls.server_thread.join() # Restore sqlite in-memory database connections' non-shareability for conn in connections.all(): if conn.vendor == 'sqlite' and conn.is_in_memory_db(conn.settings_dict['NAME']): conn.allow_thread_sharing = False @classmethod def tearDownClass(cls): cls._tearDownClassInternal() super(LiveServerTestCase, cls).tearDownClass()