Moved non-documented auth test models to the new test location.

tests/auth_tests/models/custom_permissions.py

@@ -0,0 +1,43 @@
+"""
+The CustomPermissionsUser users email as the identifier, but uses the normal
+Django permissions model. This allows us to check that the PermissionsMixin
+includes everything that is needed to interact with the ModelBackend.
+"""
+from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
+from django.contrib.auth.tests.custom_user import (
+    CustomUserManager, RemoveGroupsAndPermissions,
+)
+from django.db import models
+from django.utils.encoding import python_2_unicode_compatible
+
+
+class CustomPermissionsUserManager(CustomUserManager):
+    def create_superuser(self, email, password, date_of_birth):
+        u = self.create_user(email, password=password, date_of_birth=date_of_birth)
+        u.is_superuser = True
+        u.save(using=self._db)
+        return u
+
+
+with RemoveGroupsAndPermissions():
+    @python_2_unicode_compatible
+    class CustomPermissionsUser(AbstractBaseUser, PermissionsMixin):
+        email = models.EmailField(verbose_name='email address', max_length=255, unique=True)
+        date_of_birth = models.DateField()
+
+        custom_objects = CustomPermissionsUserManager()
+
+        USERNAME_FIELD = 'email'
+        REQUIRED_FIELDS = ['date_of_birth']
+
+        class Meta:
+            app_label = 'auth'
+
+        def get_full_name(self):
+            return self.email
+
+        def get_short_name(self):
+            return self.email
+
+        def __str__(self):
+            return self.email