Create tests module (django-json-api#855)

Module used to migrate test from example

Author: sliverc

pytest.ini

@@ -50,3 +50,12 @@ exclude_lines =
     def __str__
     def __unicode__
     def __repr__
+
+[tool:pytest]
+DJANGO_SETTINGS_MODULE=example.settings.test
+filterwarnings =
+    error::DeprecationWarning
+    error::PendingDeprecationWarning
+testpaths =
+    example
+    tests

setup.cfg

@@ -0,0 +1,21 @@
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def use_rest_framework_json_api_defaults(settings):
+    """
+    Enfroce default settings for tests modules.
+
+
+    As for now example and tests modules share the same settings file
+    some defaults which have been overwritten in the example app need
+    to be overwritten. This way testing actually happens on default resp.
+    each test defines what non default setting it wants to test.
+
+    Once migration to tests module is finished and tests can have
+    its own settings file, this fixture can be removed.
+    """
+
+    settings.JSON_API_FORMAT_FIELD_NAMES = False
+    settings.JSON_API_FORMAT_TYPES = False
+    settings.JSON_API_PLURALIZE_TYPES = False