From 36b58d0c78a065c273a19eeb4f4d6d5a2b92d425 Mon Sep 17 00:00:00 2001
From: Tom Christie <tom@tomchristie.com>
Date: Wed, 3 Oct 2012 10:51:38 +0100
Subject: [PATCH] Many2Many test

---
 rest_framework/tests/models.py     | 16 +++++++++
 rest_framework/tests/serializer.py | 56 +++++++++++++++++++++++-------
 2 files changed, 60 insertions(+), 12 deletions(-)

diff --git a/rest_framework/tests/models.py b/rest_framework/tests/models.py
index 7429d8630..c90668cad 100644
--- a/rest_framework/tests/models.py
+++ b/rest_framework/tests/models.py
@@ -28,9 +28,25 @@ from django.db import models
 #             'pk': self.id
 #         })
 
+class Anchor(models.Model):
+    """
+    A simple model to use as the target of relationships for other test models.
+    """
+    text = models.CharField(max_length=100, default='anchor')
+
+    class Meta:
+        app_label = 'rest_framework'
+
 
 class BasicModel(models.Model):
     text = models.CharField(max_length=100)
 
     class Meta:
         app_label = 'rest_framework'
+
+
+class ManyToManyModel(models.Model):
+    rel = models.ManyToManyField(Anchor)
+
+    class Meta:
+        app_label = 'rest_framework'
diff --git a/rest_framework/tests/serializer.py b/rest_framework/tests/serializer.py
index 16de2c66c..7de79f957 100644
--- a/rest_framework/tests/serializer.py
+++ b/rest_framework/tests/serializer.py
@@ -1,6 +1,7 @@
 import datetime
 from django.test import TestCase
 from rest_framework import serializers
+from rest_framework.tests.models import *
 
 
 class Comment(object):
@@ -94,18 +95,6 @@ class ValidationTests(TestCase):
 
 
 class MetadataTests(TestCase):
-    # def setUp(self):
-    #     self.comment = Comment(
-    #         'tomchristie',
-    #         'Happy new year!',
-    #         datetime.datetime(2012, 1, 1)
-    #     )
-    #     self.data = {
-    #         'email': 'tomchristie',
-    #         'content': 'Happy new year!',
-    #         'created': datetime.datetime(2012, 1, 1)
-    #     }
-
     def test_empty(self):
         serializer = CommentSerializer()
         expected = {
@@ -115,3 +104,46 @@ class MetadataTests(TestCase):
         }
         for field_name, field in expected.items():
             self.assertTrue(isinstance(serializer.data.fields[field_name], field))
+
+
+class ManyToManyTests(TestCase):
+    def setUp(self):
+        class ManyToManySerializer(serializers.ModelSerializer):
+            class Meta:
+                model = ManyToManyModel
+
+        self.serializer_class = ManyToManySerializer
+
+        # An anchor instance to use for the relationship
+        self.anchor = Anchor()
+        self.anchor.save()
+
+        # A model instance with a many to many relationship to the anchor
+        self.instance = ManyToManyModel()
+        self.instance.save()
+        self.instance.rel.add(self.anchor)
+
+        # A serialized representation of the model instance
+        self.data = {'id': 1, 'rel': [self.anchor.id]}
+
+    def test_retrieve(self):
+        serializer = self.serializer_class(instance=self.instance)
+        expected = self.data
+        self.assertEquals(serializer.data, expected)
+
+    def test_create(self):
+        data = {'rel': [self.anchor.id]}
+        serializer = self.serializer_class(data)
+        self.assertEquals(serializer.is_valid(), True)
+        serializer.object.save()
+        obj = serializer.object.object
+        self.assertEquals(obj.pk, 2)
+        self.assertEquals(list(obj.rel.all()), [self.anchor])
+        # self.assertFalse(serializer.object is expected)
+
+    # def test_deserialization_for_update(self):
+    #     serializer = self.serializer_class(self.data, instance=self.instance)
+    #     expected = self.instance
+    #     self.assertEquals(serializer.is_valid(), True)
+    #     self.assertEquals(serializer.object, expected)
+    #     self.assertTrue(serializer.object is expected)