Initial support for writable nested serialization (Not ModelSerializer)

1 files changed, 62 insertions, 0 deletions

diff --git a/rest_framework/tests/serializer_nested.py b/rest_framework/tests/serializer_nested.py
new file mode 100644
index 00000000..c8987bc5
--- /dev/null
+++ b/rest_framework/tests/serializer_nested.py
@@ -0,0 +1,62 @@
+from __future__ import unicode_literals
+from django.test import TestCase
+from rest_framework import serializers
+
+
+class TrackSerializer(serializers.Serializer):
+    order = serializers.IntegerField()
+    title = serializers.CharField(max_length=100)
+    duration = serializers.IntegerField()
+
+
+class AlbumSerializer(serializers.Serializer):
+    album_name = serializers.CharField(max_length=100)
+    artist = serializers.CharField(max_length=100)
+    tracks = TrackSerializer(many=True)
+
+
+class NestedSerializerTestCase(TestCase):
+    def test_nested_validation_success(self):
+        """
+        Correct nested serialization should return the input data.
+        """
+
+        data = {
+            'album_name': 'Discovery',
+            'artist': 'Daft Punk',
+            'tracks': [
+                {'order': 1, 'title': 'One More Time', 'duration': 235},
+                {'order': 2, 'title': 'Aerodynamic', 'duration': 184},
+                {'order': 3, 'title': 'Digital Love', 'duration': 239}
+            ]
+        }
+
+        serializer = AlbumSerializer(data=data)
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(serializer.data, data)
+
+    def test_nested_validation_error(self):
+        """
+        Incorrect nested serialization should return appropriate error data.
+        """
+
+        data = {
+            'album_name': 'Discovery',
+            'artist': 'Daft Punk',
+            'tracks': [
+                {'order': 1, 'title': 'One More Time', 'duration': 235},
+                {'order': 2, 'title': 'Aerodynamic', 'duration': 184},
+                {'order': 3, 'title': 'Digital Love', 'duration': 'foobar'}
+            ]
+        }
+        expected_errors = {
+            'tracks': [
+                {},
+                {},
+                {'duration': ['Enter a whole number.']}
+            ]
+        }
+
+        serializer = AlbumSerializer(data=data)
+        self.assertEqual(serializer.is_valid(), False)
+        self.assertEqual(serializer.errors, expected_errors)