Improved test isolation of the admin tests and assigned custom admin sites to

prevent test order dependant failures.

This involves introducing usage of `TestCase.urls` and implementing proper
admin.py modules for some of the test apps.

Thanks Florian Apolloner for finding the issue and contributing the patch.

Refs #15294 (it solves these problems so the fix for that ticket we are going
to commit doesn't introduce obscure and hard to reproduce test failures when
running the Django test suite.)

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16856 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/generic_inline_admin/models.py

@@ -1,13 +1,14 @@
 from django.db import models
-from django.contrib import admin
 from django.contrib.contenttypes import generic
 from django.contrib.contenttypes.models import ContentType
 
+
 class Episode(models.Model):
     name = models.CharField(max_length=100)
     length = models.CharField(max_length=100, blank=True)
     author = models.CharField(max_length=100, blank=True)
 
+
 class Media(models.Model):
     """
     Media that can associated to any object.
@@ -22,15 +23,6 @@ class Media(models.Model):
     def __unicode__(self):
         return self.url
 
-class MediaInline(generic.GenericTabularInline):
-    model = Media
-
-class EpisodeAdmin(admin.ModelAdmin):
-    inlines = [
-        MediaInline,
-    ]
-admin.site.register(Episode, EpisodeAdmin)
-
 #
 # These models let us test the different GenericInline settings at
 # different urls in the admin site.
@@ -43,34 +35,21 @@ admin.site.register(Episode, EpisodeAdmin)
 class EpisodeExtra(Episode):
     pass
 
-class MediaExtraInline(generic.GenericTabularInline):
-    model = Media
-    extra = 0
-
-admin.site.register(EpisodeExtra, inlines=[MediaExtraInline])
 
 #
 # Generic inline with extra and max_num
 #
-
 class EpisodeMaxNum(Episode):
     pass
 
-class MediaMaxNumInline(generic.GenericTabularInline):
-    model = Media
-    extra = 5
-    max_num = 2
-
-admin.site.register(EpisodeMaxNum, inlines=[MediaMaxNumInline])
-
 
 #
 # Generic inline with unique_together
 #
-
 class Category(models.Model):
     name = models.CharField(max_length=50)
 
+
 class PhoneNumber(models.Model):
     content_type = models.ForeignKey(ContentType)
     object_id = models.PositiveIntegerField()
@@ -81,25 +60,15 @@ class PhoneNumber(models.Model):
     class Meta:
         unique_together = (('content_type', 'object_id', 'phone_number',),)
 
+
 class Contact(models.Model):
     name = models.CharField(max_length=50)
     phone_numbers = generic.GenericRelation(PhoneNumber)
 
-class PhoneNumberInline(generic.GenericTabularInline):
-    model = PhoneNumber
-
-admin.site.register(Contact, inlines=[PhoneNumberInline])
-admin.site.register(Category)
-
 #
 # Generic inline with can_delete=False
 #
-
 class EpisodePermanent(Episode):
     pass
 
-class MediaPermanentInline(generic.GenericTabularInline):
-    model = Media
-    can_delete = False
 
-admin.site.register(EpisodePermanent, inlines=[MediaPermanentInline])