1 files changed, 100 insertions, 0 deletions
diff --git a/rest_framework/tests/test_relations.py b/rest_framework/tests/test_relations.py
new file mode 100644
index 00000000..d19219c9
--- /dev/null
+++ b/rest_framework/tests/test_relations.py
@@ -0,0 +1,100 @@
+"""
+General tests for relational fields.
+"""
+from __future__ import unicode_literals
+from django.db import models
+from django.test import TestCase
+from rest_framework import serializers
+from rest_framework.tests.models import BlogPost
+
+
+class NullModel(models.Model):
+    pass
+
+
+class FieldTests(TestCase):
+    def test_pk_related_field_with_empty_string(self):
+        """
+        Regression test for #446
+
+        https://github.com/tomchristie/django-rest-framework/issues/446
+        """
+        field = serializers.PrimaryKeyRelatedField(queryset=NullModel.objects.all())
+        self.assertRaises(serializers.ValidationError, field.from_native, '')
+        self.assertRaises(serializers.ValidationError, field.from_native, [])
+
+    def test_hyperlinked_related_field_with_empty_string(self):
+        field = serializers.HyperlinkedRelatedField(queryset=NullModel.objects.all(), view_name='')
+        self.assertRaises(serializers.ValidationError, field.from_native, '')
+        self.assertRaises(serializers.ValidationError, field.from_native, [])
+
+    def test_slug_related_field_with_empty_string(self):
+        field = serializers.SlugRelatedField(queryset=NullModel.objects.all(), slug_field='pk')
+        self.assertRaises(serializers.ValidationError, field.from_native, '')
+        self.assertRaises(serializers.ValidationError, field.from_native, [])
+
+
+class TestManyRelatedMixin(TestCase):
+    def test_missing_many_to_many_related_field(self):
+        '''
+        Regression test for #632
+
+        https://github.com/tomchristie/django-rest-framework/pull/632
+        '''
+        field = serializers.RelatedField(many=True, read_only=False)
+
+        into = {}
+        field.field_from_native({}, None, 'field_name', into)
+        self.assertEqual(into['field_name'], [])
+
+
+# Regression tests for #694 (`source` attribute on related fields)
+
+class RelatedFieldSourceTests(TestCase):
+    def test_related_manager_source(self):
+        """
+        Relational fields should be able to use manager-returning methods as their source.
+        """
+        BlogPost.objects.create(title='blah')
+        field = serializers.RelatedField(many=True, source='get_blogposts_manager')
+
+        class ClassWithManagerMethod(object):
+            def get_blogposts_manager(self):
+                return BlogPost.objects
+
+        obj = ClassWithManagerMethod()
+        value = field.field_to_native(obj, 'field_name')
+        self.assertEqual(value, ['BlogPost object'])
+
+    def test_related_queryset_source(self):
+        """
+        Relational fields should be able to use queryset-returning methods as their source.
+        """
+        BlogPost.objects.create(title='blah')
+        field = serializers.RelatedField(many=True, source='get_blogposts_queryset')
+
+        class ClassWithQuerysetMethod(object):
+            def get_blogposts_queryset(self):
+                return BlogPost.objects.all()
+
+        obj = ClassWithQuerysetMethod()
+        value = field.field_to_native(obj, 'field_name')
+        self.assertEqual(value, ['BlogPost object'])
+
+    def test_dotted_source(self):
+        """
+        Source argument should support dotted.source notation.
+        """
+        BlogPost.objects.create(title='blah')
+        field = serializers.RelatedField(many=True, source='a.b.c')
+
+        class ClassWithQuerysetMethod(object):
+            a = {
+                'b': {
+                    'c': BlogPost.objects.all()
+                }
+            }
+
+        obj = ClassWithQuerysetMethod()
+        value = field.field_to_native(obj, 'field_name')
+        self.assertEqual(value, ['BlogPost object'])