Started adding tests.

taggit/managers.py

@@ -2,7 +2,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.db import models
 
 from taggit.models import Tag, TaggedItem
-from tagging.utils import require_instance_manager
+from taggit.utils import require_instance_manager
 
 
 class TaggableManager(object):
@@ -23,25 +23,23 @@ class _TaggableManager(models.Manager):
             return Tag.objects.filter(items__object_id=self.object_id, 
                 items__content_type=ct)
         else:
-            return Tag.objects.filter(items__content_type=ct)
+            return Tag.objects.filter(items__content_type=ct).distinct()
     
     @require_instance_manager
-    def add_tag(self, tag):
+    def add(self, tags):
+        if isinstance(tags, basestring):
+            tags = [tags]
+        for tag in tags:
             tag, _ = Tag.objects.get_or_create(name=tag)
             TaggedItem.objects.create(object_id=self.object_id, 
                 content_type=ContentType.objects.get_for_model(self.model), tag=tag)
     
     @require_instance_manager
-    def add_tags(self, tags):
-        for tag in tags:
-            self.add_tag(tag)
-    
-    @require_instance_manager
-    def set_tags(self, tags):
-        self.clear_tags()
-        self.add_tags(tags)
+    def set(self, tags):
+        self.clear()
+        self.add(tags)
     
     @require_instance_manager
-    def clear_tags(self):
+    def clear(self):
         TaggedItem.objects.filter(object_id=self.object_id,
             content_type=ContentType.objects.get_for_model(self.model)).delete()

taggit/tests/__init__.py

+from taggit.tests.tests import (AddTagTestCase)

taggit/tests/models.py

+from django.db import models
+
+from taggit.managers import TaggableManager
+
+
+class Food(models.Model):
+    name = models.CharField(max_length=50)
+    
+    tags = TaggableManager()

taggit/tests/settings.py

+DATABASE_ENGINE = 'sqlite3'
+
+INSTALLED_APPS = [
+    'django.contrib.contenttypes',
+    'taggit',
+    'taggit.tests',
+]

taggit/tests/tests.py

+from django.test import TestCase
+
+from taggit.models import Tag
+from taggit.tests.models import Food
+
+class BaseTaggingTest(TestCase):
+    def assert_tags_equal(self, qs, tags):
+        tags = Tag.objects.filter(name__in=tags)
+        self.assertEqual(list(qs), list(tags))
+
+class AddTagTestCase(BaseTaggingTest):
+    def test_add_tag(self):
+        apple = Food.objects.create(name="apple")
+        self.assertEqual(list(apple.tags.all()), [])
+        self.assertEqual(list(Food.tags.all()),  [])
+        
+        apple.tags.add('green')
+        self.assert_tags_equal(apple.tags.all(), ['green'])
+        self.assert_tags_equal(Food.tags.all(), ['green'])
+        
+        pair = Food.objects.create(name="pair")
+        pair.tags.add('green')
+        self.assert_tags_equal(pair.tags.all(), ['green'])
+        self.assert_tags_equal(Food.tags.all(), ['green'])

taggit/utils.py

@@ -4,7 +4,7 @@ def split_tags(tags):
     return [o.strip() for o in tags.split(',') if o.strip()]
 
 def require_instance_manager(func):
-    @wraps
+    @wraps(func)
     def inner(self, *args, **kwargs):
         if self.object_id is None:
             raise TypeError("Can't call %s with a non-instance manager" % func.__name__)