From 9805a085fb115785f272489dc24b51ba6f8e6329 Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Mon, 29 Sep 2014 11:23:02 +0100
Subject: UniqueTogetherValidator

---
 tests/test_validators.py | 129 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 122 insertions(+), 7 deletions(-)

(limited to 'tests/test_validators.py')

diff --git a/tests/test_validators.py b/tests/test_validators.py
index a1366a1a..c35ecb51 100644
--- a/tests/test_validators.py
+++ b/tests/test_validators.py
@@ -3,33 +3,148 @@ from django.test import TestCase
 from rest_framework import serializers
 
 
-class ExampleModel(models.Model):
+def dedent(blocktext):
+    return '\n'.join([line[12:] for line in blocktext.splitlines()[1:-1]])
+
+
+# Tests for `UniqueValidator`
+# ---------------------------
+
+class UniquenessModel(models.Model):
     username = models.CharField(unique=True, max_length=100)
 
 
-class ExampleSerializer(serializers.ModelSerializer):
+class UniquenessSerializer(serializers.ModelSerializer):
     class Meta:
-        model = ExampleModel
+        model = UniquenessModel
 
 
 class TestUniquenessValidation(TestCase):
     def setUp(self):
-        self.instance = ExampleModel.objects.create(username='existing')
+        self.instance = UniquenessModel.objects.create(username='existing')
+
+    def test_repr(self):
+        serializer = UniquenessSerializer()
+        expected = dedent("""
+            UniquenessSerializer():
+                id = IntegerField(label='ID', read_only=True)
+                username = CharField(max_length=100, validators=[<UniqueValidator(queryset=UniquenessModel.objects.all())>])
+        """)
+        assert repr(serializer) == expected
 
     def test_is_not_unique(self):
         data = {'username': 'existing'}
-        serializer = ExampleSerializer(data=data)
+        serializer = UniquenessSerializer(data=data)
         assert not serializer.is_valid()
         assert serializer.errors == {'username': ['This field must be unique.']}
 
     def test_is_unique(self):
         data = {'username': 'other'}
-        serializer = ExampleSerializer(data=data)
+        serializer = UniquenessSerializer(data=data)
         assert serializer.is_valid()
         assert serializer.validated_data == {'username': 'other'}
 
     def test_updated_instance_excluded(self):
         data = {'username': 'existing'}
-        serializer = ExampleSerializer(self.instance, data=data)
+        serializer = UniquenessSerializer(self.instance, data=data)
         assert serializer.is_valid()
         assert serializer.validated_data == {'username': 'existing'}
+
+
+# Tests for `UniqueTogetherValidator`
+# -----------------------------------
+
+class UniquenessTogetherModel(models.Model):
+    race_name = models.CharField(max_length=100)
+    position = models.IntegerField()
+
+    class Meta:
+        unique_together = ('race_name', 'position')
+
+
+class UniquenessTogetherSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = UniquenessTogetherModel
+
+
+class TestUniquenessTogetherValidation(TestCase):
+    def setUp(self):
+        self.instance = UniquenessTogetherModel.objects.create(
+            race_name='example',
+            position=1
+        )
+        UniquenessTogetherModel.objects.create(
+            race_name='example',
+            position=2
+        )
+        UniquenessTogetherModel.objects.create(
+            race_name='other',
+            position=1
+        )
+
+    def test_repr(self):
+        serializer = UniquenessTogetherSerializer()
+        expected = dedent("""
+            UniquenessTogetherSerializer(validators=[<UniqueTogetherValidator(queryset=UniquenessTogetherModel.objects.all(), fields=('race_name', 'position'))>]):
+                id = IntegerField(label='ID', read_only=True)
+                race_name = CharField(max_length=100)
+                position = IntegerField()
+        """)
+        assert repr(serializer) == expected
+
+    def test_is_not_unique_together(self):
+        """
+        Failing unique together validation should result in non field errors.
+        """
+        data = {'race_name': 'example', 'position': 2}
+        serializer = UniquenessTogetherSerializer(data=data)
+        print serializer.validators
+        assert not serializer.is_valid()
+        assert serializer.errors == {
+            'non_field_errors': [
+                'The fields race_name, position must make a unique set.'
+            ]
+        }
+
+    def test_is_unique_together(self):
+        """
+        In a unique together validation, one field may be non-unique
+        so long as the set as a whole is unique.
+        """
+        data = {'race_name': 'other', 'position': 2}
+        serializer = UniquenessTogetherSerializer(data=data)
+        assert serializer.is_valid()
+        assert serializer.validated_data == {
+            'race_name': 'other',
+            'position': 2
+        }
+
+    def test_updated_instance_excluded_from_unique_together(self):
+        """
+        When performing an update, the existing instance does not count
+        as a match against uniqueness.
+        """
+        data = {'race_name': 'example', 'position': 1}
+        serializer = UniquenessTogetherSerializer(self.instance, data=data)
+        assert serializer.is_valid()
+        assert serializer.validated_data == {
+            'race_name': 'example',
+            'position': 1
+        }
+
+    def test_ignore_exlcuded_fields(self):
+        """
+        When model fields are not included in a serializer, then uniqueness
+        validtors should not be added for that field.
+        """
+        class ExcludedFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = UniquenessTogetherModel
+                fields = ('id', 'race_name',)
+        serializer = ExcludedFieldSerializer()
+        expected = dedent("""
+            ExcludedFieldSerializer():
+                id = IntegerField(label='ID', read_only=True)
+                race_name = CharField(max_length=100)
+        """)
+        assert repr(serializer) == expected
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