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django/tests
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Adam Johnson 9ae40d8137 [3.1.x] Fixes #31877 -- Used lazy() for TemplateView kwarg deprecation warning. 
SimpleLazyObjects cause a crash when filtering.

Thanks Tim L. White for the report.
Regression in 4ed534758cb6a11df9f49baddecca5a6cdda9311.

Backport of 20799cc0a6d98816b9ef0577e24691bd26b80d7d from master
2020-08-13 13:13:25 +02:00
..
absolute_url_overrides
…
admin_autodiscover
Used assertRaisesMessage() in various tests.
2020-02-07 12:46:23 +01:00
admin_changelist
[3.1.x] Fixed #31597, #31603 -- Corrected admin clear all filters link behavior.
2020-05-20 21:35:09 +02:00
admin_checks
[3.1.x] Fixed #31575 -- Added system check for admin sidebar request context processor dependency.
2020-05-14 11:01:22 +02:00
admin_custom_urls
Updated test URL patterns to use path() and re_path().
2018-12-31 10:47:32 -05:00
admin_default_site
Fixed #8500 -- Allowed overriding the default admin site instance.
2018-02-03 18:51:10 -05:00
admin_docs
[3.1.x] Updated docutils link to HTTPS and new location.
2020-05-18 08:46:51 +02:00
admin_filters
Fixed #28991 -- Added EmptyFieldListFilter class in admin.filters.
2020-01-03 07:58:04 +01:00
admin_inlines
Fixed #31034 -- Added a navigation sidebar to the admin.
2020-05-11 18:16:38 +02:00
admin_ordering
Made reused RequestFactory instances class attributes.
2018-11-27 09:49:02 -05:00
admin_registration
Fixed #27360 -- Added app or ModelAdmin details for AreadyRegistered exceptions.
2019-03-25 17:34:53 -04:00
admin_scripts
[3.1.x] Fixed #31575 -- Added system check for admin sidebar request context processor dependency.
2020-05-14 11:01:22 +02:00
admin_utils
Fixed #31157 -- Fixed displaying read-only JSONField values in admin.
2020-05-08 09:44:42 +02:00
admin_views
[3.1.x] Fixed #31865 -- Adjusted admin nav sidebar template to reduce debug logging.
2020-08-11 11:43:22 +02:00
admin_widgets
[3.1.x] Fixed CVE-2020-13596 -- Fixed potential XSS in admin ForeignKeyRawIdWidget.
2020-06-03 09:30:41 +02:00
aggregation
[3.1.x] Fixed #31568 -- Fixed alias reference when aggregating over multiple subqueries.
2020-05-14 10:26:05 +02:00
aggregation_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
annotations
[3.1.x] Fixed #31773 -- Fixed preserving output_field in ExpressionWrapper for combined expressions.
2020-07-09 11:55:45 +02:00
app_loading
…
apps
Fixed #27685 -- Added watchman support to the autoreloader.
2019-01-13 20:33:47 -05:00
asgi
[3.1.x] Fixed #31594 -- Added ASGIStaticFilesHandler.get_response_async().
2020-06-08 13:00:48 +02:00
async
Refs #31224 -- Added autoconversion of test async methods.
2020-03-05 14:29:21 +01:00
auth_tests
[3.1.x] Fixed #31842 -- Added DEFAULT_HASHING_ALGORITHM transitional setting.
2020-08-04 09:39:29 +02:00
backends
Refs #30116 -- Simplified regex match group access with Match.__getitem__().
2020-05-11 12:01:28 +02:00
base
…
bash_completion
Removed parser.add_arguments() arguments that match the defaults.
2018-07-02 17:54:57 -04:00
basic
Fixed #29129 -- Skipped UPDATE when adding a model instance with inherited primary key that has a default.
2020-03-05 12:08:38 +01:00
builtin_server
Refs #29069 -- Added test for calling request_finished signal by static file responses.
2020-04-20 06:17:57 +02:00
bulk_create
Fixed #31301 -- Fixed crash of QuerySet.bulk_create() with mixed empty and set ForeignKeys to AutoFields on Oracle.
2020-02-28 12:56:03 +01:00
cache
[3.1.x] Fixed #31728 -- Fixed cache culling when no key is found for deletion.
2020-06-22 07:10:16 +02:00
check_framework
Fixed #31459 -- Fixed handling invalid indentifiers in URL path conversion.
2020-04-15 11:29:35 +02:00
conditional_processing
Updated test URL patterns to use path() and re_path().
2018-12-31 10:47:32 -05:00
constraints
Fixed #20581 -- Added support for deferrable unique constraints.
2020-04-30 10:43:50 +02:00
contenttypes_tests
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
context_processors
Refs #28478 -- Deprecated TestCase's allow_database_queries and multi_db in favor of databases.
2019-01-10 19:11:21 -05:00
csrf_tests
Refs #30116 -- Simplified regex match group access with Match.__getitem__().
2020-05-11 12:01:28 +02:00
custom_columns
Followed style guide for model attribute ordering.
2018-12-27 19:34:14 -05:00
custom_lookups
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
custom_managers
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
custom_methods
…
custom_migration_operations
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custom_pk
Refs #30573 -- Rephrased "Of Course" and "Obvious(ly)" in documentation and comments.
2020-05-04 12:10:47 +02:00
datatypes
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
dates
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
datetimes
Refs #29724 -- Added is_dst parameter to QuerySet.datetimes().
2020-03-20 12:55:33 +01:00
db_functions
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
db_typecasts
…
db_utils
Simplified imports from django.db and django.contrib.gis.db.
2020-02-04 13:20:06 +01:00
dbshell
Fixed #29501 -- Allowed dbshell to pass options to underlying tool.
2020-04-14 14:02:51 +01:00
decorators
Refs #26601 -- Deprecated passing None as get_response arg to middleware classes.
2020-02-18 20:03:44 +01:00
defer
Fixed #30988 -- Deprecated the InvalidQuery exception.
2019-11-18 14:06:51 +01:00
defer_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
delete
[3.1.x] Fixed #31624 -- Avoided subquery usage on QuerySet.all().delete().
2020-05-25 08:47:51 +02:00
delete_regress
Switched setUp() to setUpTestData() where possible in Django's tests.
2018-11-27 09:35:17 -05:00
deprecation
[3.1.x] Fixed #31842 -- Added DEFAULT_HASHING_ALGORITHM transitional setting.
2020-08-04 09:39:29 +02:00
dispatch
Fixed #31327 -- Deprecated providing_args argument for Signal.
2020-03-05 09:38:52 +01:00
distinct_on_fields
Switched setUp() to setUpTestData() where possible in Django's tests.
2018-11-27 09:35:17 -05:00
empty
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empty_models
Added assertions for an empty stdout to CoreCommandsNoOutputTests.
2020-04-20 11:32:03 +02:00
expressions
[3.1.x] Fixed #31659 -- Made ExpressionWrapper preserve output_field for combined expressions.
2020-06-12 07:21:19 +02:00
expressions_case
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
expressions_window
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
extra_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
field_deconstruction
Fixed #23916 -- Allowed makemigrations to handle related model name case changes.
2020-03-25 10:39:34 +01:00
field_defaults
…
field_subclassing
Fixed #30657 -- Allowed customizing Field's descriptors with a descriptor_class attribute.
2019-07-25 08:15:20 +02:00
file_storage
Refs #28184 -- Added test for FileField storage default.
2020-04-08 11:26:17 +02:00
file_uploads
[3.1.x] Fixed #28132 -- Made MultiPartParser ignore filenames with trailing slash.
2020-06-11 09:12:14 +02:00
files
Refs #29983 -- Added test for FILE_UPLOAD_TEMP_DIR pathlib support.
2019-11-06 08:20:23 +01:00
filtered_relation
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
fixtures
Added tests for loaddata with gzip/bzip2 compressed fixtures.
2020-05-08 08:16:50 +02:00
fixtures_model_package
Renamed camelCaseTestMethods to snake_case_test_methods
2019-04-14 16:14:14 +02:00
fixtures_regress
Enforced uniqueness of natural keys used in tests.
2020-04-07 10:54:19 +02:00
flatpages_tests
Fixed #22261 -- Fixed resolving namespaced URLs for flatpages.
2020-01-28 13:14:23 +01:00
force_insert_update
…
foreign_object
Fixed typos in docs and a test comment.
2020-02-19 07:08:23 +01:00
forms_tests
[3.1.x] Fixed #31536 -- Fixed rendering of disabled AdminFileWidget and ClearableFileInput.
2020-06-01 12:48:26 +02:00
from_db_value
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
generic_inline_admin
Changed '%s' % value pattern to str(value).
2020-05-04 08:27:18 +02:00
generic_relations
Fixed #31190 -- Fixed prefetch_related() crash for GenericForeignKey with custom ContentType foreign key.
2020-01-22 07:54:16 +01:00
generic_relations_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
generic_views
[3.1.x] Fixes #31877 -- Used lazy() for TemplateView kwarg deprecation warning.
2020-08-13 13:13:25 +02:00
get_earliest_or_latest
Refs #11557 -- Removed the field_name keyword argument to QuerySet.earliest() and latest().
2019-01-17 10:52:19 -05:00
get_object_or_404
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
get_or_create
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
gis_tests
Fixed #30678 -- Added support for GDAL 3.
2020-05-12 09:06:06 +02:00
handlers
Capitalized Unicode in docs, strings, and comments.
2020-04-20 12:10:33 +02:00
httpwrappers
Capitalized Unicode in docs, strings, and comments.
2020-04-20 12:10:33 +02:00
humanize_tests
Fixed #31363 -- Added support for negative integers to intword template filter.
2020-03-16 08:44:43 +01:00
i18n
[3.1.x] Fixed #30134 -- Ensured unlocalized numbers are string representation in templates.
2020-06-04 11:00:40 +02:00
import_error_package
…
indexes
Fixed #31233 -- Closed database connections and cursors after use.
2020-02-06 15:35:23 +01:00
inline_formsets
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inspectdb
[3.1.x] Fixed #31736 -- Fixed InspectDBTransactionalTests.test_foreign_data_wrapper crash on Windows.
2020-06-23 21:00:09 +02:00
introspection
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
invalid_models_tests
Fixed #12990, Refs #27694 -- Added JSONField model field.
2020-05-08 07:23:31 +02:00
known_related_objects
…
logging_tests
Fixed tests isolation in logging_tests.
2020-05-08 10:49:34 +02:00
lookup
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
m2m_and_m2o
Followed style guide for model attribute ordering.
2018-12-27 19:34:14 -05:00
m2m_intermediary
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
m2m_multiple
…
m2m_recursive
Fixed #30421 -- Allowed symmetrical intermediate table for self-referential ManyToManyField.
2019-06-21 15:03:17 +02:00
m2m_regress
Refs #26022 -- Used context manager version of assertRaisesMessage in tests.
2019-04-29 08:05:07 +02:00
m2m_signals
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
m2m_through
[3.1.x] Fixed #31752 -- Fixed intermittent test_order_by_relational_field_through_model failure.
2020-06-30 13:08:58 +02:00
m2m_through_regress
Changed '%s' % value pattern to str(value).
2020-05-04 08:27:18 +02:00
m2o_recursive
Adjusted code style of a few test data setup methods.
2018-11-27 09:48:22 -05:00
mail
[3.1.x] Fixed #31784 -- Fixed crash when sending emails on Python 3.6.11+, 3.7.8+, and 3.8.4+.
2020-07-20 07:15:04 +02:00
managers_regress
Fixed #31223 -- Added __class_getitem__() to Manager and QuerySet.
2020-04-15 11:26:11 +02:00
many_to_many
Fixed #31095 -- Made RelatedManager.set() preserve existing m2m relations with an invalid type.
2019-12-19 13:33:05 +01:00
many_to_one
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
many_to_one_null
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
max_lengths
Fixed #30295 -- Fixed max_lengths.tests.MaxLengthORMTests when run in isolation.
2019-03-28 10:18:30 +01:00
messages_tests
[3.1.x] Fixed #31842 -- Added DEFAULT_HASHING_ALGORITHM transitional setting.
2020-08-04 09:39:29 +02:00
middleware
Refs #26601 -- Deprecated passing None as get_response arg to middleware classes.
2020-02-18 20:03:44 +01:00
middleware_exceptions
Refs #31040 -- Used 402 HTTP status in middleware_exceptions tests.
2020-03-31 12:09:17 +02:00
migrate_signals
…
migration_test_data_persistence
…
migrations
[3.1.x] Reverted "Fixed #30300 -- Allowed migrations to be loaded from directories without __init__.py file."
2020-07-22 07:04:52 +02:00
migrations2
…
model_enums
Fixed #31154 -- Added support for using enumeration types in templates.
2020-01-10 07:52:06 +01:00
model_fields
[3.1.x] Refs #31829 -- Added DatabaseFeatures.json_key_contains_list_matching_requires_list.
2020-07-30 06:40:32 +02:00
model_forms
Changed django.forms.ValidationError imports to django.core.exceptions.ValidationError.
2020-04-28 10:49:00 +02:00
model_formsets
Changed '%s' % value pattern to str(value).
2020-05-04 08:27:18 +02:00
model_formsets_regress
Used 4 space hanging indent for dictionaries.
2019-01-02 18:18:19 -05:00
model_indexes
Simplified imports from django.db and django.contrib.gis.db.
2020-02-04 13:20:06 +01:00
model_inheritance
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
model_inheritance_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
model_meta
Simplified imports from django.db and django.contrib.gis.db.
2020-02-04 13:20:06 +01:00
model_options
Fixed #30023 -- Prevented SQLite schema alterations while foreign key checks are enabled.
2018-12-15 18:51:59 -05:00
model_package
…
model_regress
Optimized Model and QuerySet pickling version comparison.
2020-05-11 09:50:11 +02:00
modeladmin
Fixed #30311 -- Restored ability to override global admin actions.
2020-04-17 20:23:00 +02:00
multiple_database
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
mutually_referential
…
nested_foreign_keys
Switched setUp() to setUpTestData() where possible in Django's tests.
2018-11-27 09:35:17 -05:00
no_models
…
null_fk
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
null_fk_ordering
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
null_queries
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
one_to_one
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
or_lookups
Switched setUp() to setUpTestData() where possible in Django's tests.
2018-11-27 09:35:17 -05:00
order_with_respect_to
Fixed #13296 -- Fixed ordering by Options.order_with_respect_to after deleting objects.
2019-09-23 11:20:37 +02:00
ordering
[3.1.x] Fixed #31657 -- Fixed ordering by attnames of self-referential ForeignKeys.
2020-06-10 12:05:31 +02:00
pagination
Fixed #14218 -- Added Paginator.__iter__().
2019-10-02 09:49:31 +02:00
postgres_tests
[3.1.x] Fixed #31601 -- Fixed SearchHeadlineTests on PostgresSQL 9.6.18+, 10.13+, 11.8+, and 12.3+.
2020-05-19 08:04:27 +02:00
prefetch_related
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
project_template
Fixed #31232 -- Changed default SECURE_REFERRER_POLICY to 'same-origin'.
2020-02-05 14:39:01 +01:00
properties
Adjusted code style of a few test data setup methods.
2018-11-27 09:48:22 -05:00
proxy_model_inheritance
Removed obsolete TODO in proxy_model_inheritance test.
2018-08-16 09:20:31 -04:00
proxy_models
Updated test URL patterns to use path() and re_path().
2018-12-31 10:47:32 -05:00
queries
[3.1.x] Fixed #31664 -- Reallowed using non-expressions having filterable attribute as rhs in queryset filters.
2020-06-08 09:18:32 +02:00
queryset_pickle
Optimized Model and QuerySet pickling version comparison.
2020-05-11 09:50:11 +02:00
raw_query
Fixed #30988 -- Deprecated the InvalidQuery exception.
2019-11-18 14:06:51 +01:00
redirects_tests
Updated test URL patterns to use path() and re_path().
2018-12-31 10:47:32 -05:00
requests
Fixed #30997 -- Deprecated HttpRequest.is_ajax().
2020-01-27 08:54:32 +01:00
requirements
[3.1.x] Pinned asgiref to 3.2 series with minimum version to 3.2.10.
2020-07-17 11:08:39 +02:00
reserved_names
…
resolve_url
Removed unnecessary tuple wrapping of single format string argument.
2020-04-27 08:30:16 +02:00
responses
[3.1.x] Fixed #31790 -- Fixed setting SameSite and Secure cookies flags in HttpResponse.delete_cookie().
2020-07-16 08:17:45 +02:00
reverse_lookup
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
save_delete_hooks
…
schema
[3.1.x] Fixed #31805 -- Fixed SchemaTests.tearDown() when table names are case-insensitive.
2020-07-22 12:51:03 +02:00
select_for_update
[3.1.x] Fixed #31866 -- Fixed locking proxy models in QuerySet.select_for_update(of=()).
2020-08-11 12:30:31 +02:00
select_related
Refs #30573 -- Rephrased "Of Course" and "Obvious(ly)" in documentation and comments.
2020-05-04 12:10:47 +02:00
select_related_onetoone
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
select_related_regress
Removed unused __str__() methods in tests models.
2020-04-30 09:13:23 +02:00
serializers
Changed '%s' % value pattern to str(value).
2020-05-04 08:27:18 +02:00
servers
Replaced unnecessary str()/bytes() calls with literals.
2019-11-18 15:30:10 +01:00
sessions_tests
[3.1.x] Fixed #31864 -- Fixed encoding session data during transition to Django 3.1.
2020-08-07 21:43:46 +02:00
settings_tests
Fixed #25598 -- Added SCRIPT_NAME prefix to STATIC_URL and MEDIA_URL set to relative paths.
2019-09-25 19:47:03 +02:00
shell
Replaced django.test.utils.patch_logger() with assertLogs().
2018-05-07 09:34:00 -04:00
shortcuts
Refs #25978 -- Removed shortcuts.render_to_response() per deprecation timeline.
2019-01-17 10:50:25 -05:00
signals
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
signed_cookies_tests
…
signing
[3.1.x] Fixed #31842 -- Added DEFAULT_HASHING_ALGORITHM transitional setting.
2020-08-04 09:39:29 +02:00
sitemaps_tests
Fixed #30159 -- Removed unneeded use of OrderedDict.
2019-02-06 13:48:39 -05:00
sites_framework
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
sites_tests
Removed redundant MiddlewareTest.test_old_style_request() test.
2020-02-14 10:35:58 +01:00
staticfiles_tests
[3.1.x] Fixed #31594 -- Added ASGIStaticFilesHandler.get_response_async().
2020-06-08 13:00:48 +02:00
str
…
string_lookup
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
swappable_models
…
syndication_tests
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
template_backends
Refs #30116 -- Simplified regex match group access with Match.__getitem__().
2020-05-11 12:01:28 +02:00
template_loader
…
template_tests
Fixed #25236 -- Deprecated {% ifequal %} and {% ifnotequal %} template tags.
2020-05-11 09:07:33 +02:00
templates
Fixed #31080 -- Removed redundant type="text/javascript" attribute from <script> tags.
2019-12-11 09:49:54 +01:00
test_client
Changed django.forms.ValidationError imports to django.core.exceptions.ValidationError.
2020-04-28 10:49:00 +02:00
test_client_regress
Refs #30116 -- Simplified regex match group access with Match.__getitem__().
2020-05-11 12:01:28 +02:00
test_exceptions
…
test_runner
Refs #31117 -- Made various tests properly handle unexpected databases aliases.
2020-01-20 14:39:02 +01:00
test_runner_apps
Fixed #27430 -- Added -b/--buffer option to DiscoverRunner.
2019-12-09 13:47:12 +01:00
test_utils
Capitalized Unicode in docs, strings, and comments.
2020-04-20 12:10:33 +02:00
timezones
Refs #30573 -- Rephrased "Of Course" and "Obvious(ly)" in documentation and comments.
2020-05-04 12:10:47 +02:00
transaction_hooks
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
transactions
Fixed #30116 -- Dropped support for Python 3.5.
2019-01-30 10:19:48 -05:00
unmanaged_models
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
update
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
update_only_fields
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
urlpatterns
Fixed #31534 -- Deprecated django.conf.urls.url().
2020-05-05 07:34:34 +02:00
urlpatterns_reverse
Fixed #31114 -- Fixed HttpRequest.build_absolute_uri() crash with reverse_lazy() locations.
2019-12-27 09:19:56 +01:00
user_commands
Disabled management commands output with verbosity 0 in various tests.
2020-04-20 09:09:26 +02:00
utils_tests
[3.1.x] Used temporary directory in RestartWithReloaderTests.test_manage_py().
2020-07-20 09:41:28 +02:00
validation
Removed unused __str__() methods in tests models.
2020-04-15 20:20:32 +02:00
validators
Fixed #31548 -- Fixed URLValidator crash on non-strings.
2020-05-08 20:53:05 +02:00
version
…
view_tests
Refs #30116 -- Simplified regex match group access with Match.__getitem__().
2020-05-11 12:01:28 +02:00
wsgi
Fixed #30567 -- Made WSGIHandler pass FileResponse.block_size to wsgi.file_wrapper.
2019-07-26 07:31:51 +02:00
.coveragerc
…
README.rst
Fixed #30367 -- Changed "pip install" to "python -m pip install" in docs, comments and hints.
2019-04-18 14:41:15 +02:00
runtests.py
Refs #31369 -- Deprecated models.NullBooleanField in favor of BooleanField(null=True).
2020-04-24 10:10:45 +02:00
test_sqlite.py
…
urls.py
…

README.rst 

To run the test suite, first, create and activate a virtual environment. Then
install some requirements and run the tests::

    $ cd tests
    $ python -m pip install -e ..
    $ python -m pip install -r requirements/py3.txt
    $ ./runtests.py

For more information about the test suite, see
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/.