text: import os
  import sys
  
  import django
  from django.core import management
  
  
  def pytest_addoption(parser):
      parser.addoption('--no-pkgroot', action='store_true', default=False,
                       help='Remove package root directory from sys.path, ensuring that '
                            'rest_framework is imported from the installed site-packages. '
                            'Used for testing the distribution.')
      parser.addoption('--staticfiles', action='store_true', default=False,
                       help='Run tests with static files collection, using manifest '
                            'staticfiles storage. Used for testing the distribution.')
  
  
  def pytest_configure(config):
      from django.conf import settings
  
      settings.configure(
          DEBUG_PROPAGATE_EXCEPTIONS=True,
          DATABASES={
              'default': {
                  'ENGINE': 'django.db.backends.sqlite3',
                  'NAME': ':memory:'
              }
          },
          SITE_ID=1,
          SECRET_KEY='not very secret in tests',
          USE_I18N=True,
          USE_L10N=True,
          STATIC_URL='/static/',
          ROOT_URLCONF='tests.urls',
          TEMPLATES=[
              {
                  'BACKEND': 'django.template.backends.django.DjangoTemplates',
                  'APP_DIRS': True,
                  'OPTIONS': {
                      "debug": True,  # We want template errors to raise
                  }
              },
          ],
          MIDDLEWARE=(
              'django.middleware.common.CommonMiddleware',
              'django.contrib.sessions.middleware.SessionMiddleware',
              'django.contrib.auth.middleware.AuthenticationMiddleware',
              'django.contrib.messages.middleware.MessageMiddleware',
          ),
          INSTALLED_APPS=(
              'django.contrib.admin',
              'django.contrib.auth',
              'django.contrib.contenttypes',
              'django.contrib.sessions',
              'django.contrib.sites',
              'django.contrib.staticfiles',
              'rest_framework',
              'rest_framework.authtoken',
              'tests.authentication',
              'tests.generic_relations',
              'tests.importable',
              'tests',
          ),
          PASSWORD_HASHERS=(
              'django.contrib.auth.hashers.MD5PasswordHasher',
          ),
      )
  
      # guardian is optional
      # Note that for the test cases we're installing a version of django-guardian
      # that's only compatible with Django 2.0+.
      if django.VERSION >= (2, 0, 0):
          try:
              import guardian  # NOQA
          except ImportError:
              pass
          else:
              settings.ANONYMOUS_USER_ID = -1
              settings.AUTHENTICATION_BACKENDS = (
                  'django.contrib.auth.backends.ModelBackend',
                  'guardian.backends.ObjectPermissionBackend',
              )
              settings.INSTALLED_APPS += (
                  'guardian',
              )
  
      if config.getoption('--no-pkgroot'):
          sys.path.pop(0)
  
          # import rest_framework before pytest re-adds the package root directory.
          import rest_framework
          package_dir = os.path.join(os.getcwd(), 'rest_framework')
          assert not rest_framework.__file__.startswith(package_dir)
  
      # Manifest storage will raise an exception if static files are not present (ie, a packaging failure).
      if config.getoption('--staticfiles'):
          import rest_framework
          settings.STATIC_ROOT = os.path.join(os.path.dirname(rest_framework.__file__), 'static-root')
          settings.STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'
  
      django.setup()
  
      if config.getoption('--staticfiles'):
          management.call_command('collectstatic', verbosity=0, interactive=False)
  