Add JSON serialization tests.

Mobile Buy SDK/Mobile Buy SDK Tests/BUYPropertyDescriptionAdditionsTests.m

@@ -25,33 +25,187 @@
 //
 
 #import <XCTest/XCTest.h>
+#import <CoreData/CoreData.h>
 
-@interface BUYPropertyDescriptionAdditionsTests : XCTestCase
+#import "BUYFlatCollectionTransformer.h"
+#import "BUYDateTransformer.h"
+#import "NSPropertyDescription+BUYAdditions.h"
+#import "TestModel.h"
+
+static NSString * const RootEntity = @"Root";
+static NSString * const BranchEntity = @"Branch";
+static NSString * const LeafEntity = @"Leaf";
+static NSString * const NestEntity = @"Nest";
+static NSString * const BirdEntity = @"Bird";
 
+@interface BUYPropertyDescriptionAdditionsTests : XCTestCase
+@property (nonatomic) NSManagedObjectModel *model;
+@property (nonatomic) TestModelManager *modelManager;
 @end
 
 @implementation BUYPropertyDescriptionAdditionsTests
 
-- (void)setUp {
-    [super setUp];
-    // Put setup code here. This method is called before the invocation of each test method in the class.
++ (void)initialize
+{
+	if (self == [BUYPropertyDescriptionAdditionsTests class]) {
+		[NSValueTransformer setValueTransformer:[BUYFlatCollectionTransformer arrayTransformer] forName:@"Array"];
+		[NSValueTransformer setValueTransformer:[BUYFlatCollectionTransformer setTransformer] forName:@"Set"];
+	}
+}
+
+- (instancetype)initWithInvocation:(NSInvocation *)invocation
+{
+	self = [super initWithInvocation:invocation];
+	if (self) {
+		self.modelManager = [[TestModelManager alloc] init];
+		self.model = self.modelManager.model;
+	}
+	return self;
+}
+
+- (NSEntityDescription *)entityForName:(NSString *)entityName
+{
+	return self.model.entitiesByName[entityName];
+}
+
+- (NSAttributeDescription *)attributeWithName:(NSString *)attributeName forEntity:(NSString *)entityName
+{
+	return [[self entityForName:entityName] attributesByName][attributeName];
+}
+
+- (NSRelationshipDescription *)relationshipWithName:(NSString *)propertyName forEntity:(NSString *)entityName
+{
+	return [[self entityForName:entityName] relationshipsByName][propertyName];
+}
+
+- (void)testJSONTransformerName
+{
+	XCTAssertEqualObjects(BUYDateTransformerName, [self attributeWithName:@"date" forEntity:LeafEntity].JSONValueTransformerName);
+}
+
+- (void)testJSONPropertyKey
+{
+	XCTAssertEqualObjects(@"createDate", [self attributeWithName:@"date" forEntity:LeafEntity].JSONPropertyKey);
+}
+
+- (void)testJSONValueTransformer
+{
+	XCTAssertEqualObjects([BUYFlatCollectionTransformer class], [[self attributeWithName:@"tags" forEntity:LeafEntity].JSONValueTransformer class]);
+}
+
+- (void)testInteger
+{
+	NSAttributeDescription *idAttribute = [self attributeWithName:@"identifier" forEntity:RootEntity];
+	NSNumber *identifier = @10001;
+	XCTAssertEqualObjects(identifier, [idAttribute buy_JSONForValue:identifier]);
+	XCTAssertEqualObjects(identifier, [idAttribute buy_valueForJSON:identifier object:nil]);
+}
+
+- (void)testString
+{
+	NSAttributeDescription *stringAttribute = [self attributeWithName:@"name" forEntity:RootEntity];
+	NSString *name = @"MyRoot";
+	XCTAssertEqualObjects(name, [stringAttribute buy_JSONForValue:name]);
+	XCTAssertEqualObjects(name, [stringAttribute buy_valueForJSON:name object:nil]);
+}
+
+- (void)testDecimalNumber
+{
+	NSAttributeDescription *decimalAttribute = [self attributeWithName:@"age" forEntity:RootEntity];
+	NSString *ageString = @"145";
+	NSDecimalNumber *age = [NSDecimalNumber decimalNumberWithString:ageString];
+	XCTAssertEqualObjects(ageString, [decimalAttribute buy_JSONForValue:age]);
+	XCTAssertEqualObjects(age, [decimalAttribute buy_valueForJSON:ageString object:nil]);
+}
+
+- (void)testDate
+{
+	NSAttributeDescription *dateAttribute = [self attributeWithName:@"date" forEntity:LeafEntity];
+	NSString *dateString = @"1970-01-01T01:17:59+0000";
+	NSDate *date = [NSDate dateWithTimeIntervalSince1970:4679.0];
+	XCTAssertEqualObjects(dateString, [dateAttribute buy_JSONForValue:date]);
+	XCTAssertEqualObjects(date, [dateAttribute buy_valueForJSON:dateString object:nil]);
+}
+
+- (void)testURL
+{
+	// the Root.url attribute declares "attributeValueClass = NSURL; JSONTransformerName = BUYURL"
+	NSAttributeDescription *urlAttribute = [self attributeWithName:@"url" forEntity:RootEntity];
+	NSString *urlString = @"https://www.example.com/api/model.json?id=100";
+	NSURL *url = [NSURL URLWithString:urlString];
+	XCTAssertEqualObjects(urlString, [urlAttribute buy_JSONForValue:url]);
+	XCTAssertEqualObjects(url, [urlAttribute buy_valueForJSON:urlString object:nil]);
+}
+
+- (void)testFlatArray
+{
+	NSAttributeDescription *arrayDescription = [self attributeWithName:@"ornaments" forEntity:BranchEntity];
+	NSString *ornamentsString = @"one two three two one";
+	NSArray *ornaments = @[@"one", @"two", @"three", @"two", @"one"];
+	XCTAssertEqualObjects(ornamentsString, [arrayDescription buy_JSONForValue:ornaments]);
+	XCTAssertEqualObjects(ornaments, [arrayDescription buy_valueForJSON:ornamentsString object:nil]);
+}
+
+- (void)testFlatSet
+{
+	NSAttributeDescription *setDescription = [self attributeWithName:@"tags" forEntity:LeafEntity];
+	NSString *tagsString = @"blue green red";
+	NSSet *tags = [NSSet setWithArray:@[@"red", @"green", @"blue"]];
+	XCTAssertEqualObjects(tags, [setDescription buy_valueForJSON:tagsString object:nil]);
+
+	NSString *jsonString = [setDescription buy_JSONForValue:tags];
+	NSSet *actual = [NSSet setWithArray:[jsonString componentsSeparatedByString:@" "]];
+	XCTAssertEqualObjects(actual, tags);
 }
 
-- (void)tearDown {
-    // Put teardown code here. This method is called after the invocation of each test method in the class.
-    [super tearDown];
+- (void)testRelationship
+{
+	Branch *branch = [self.modelManager buy_objectWithEntityName:BranchEntity JSONDictionary:nil];
+	NSRelationshipDescription *nestRelationship = [self relationshipWithName:@"nest" forEntity:BranchEntity];
+	NSDictionary *expected = @{ @"egg_count" : @2 };
+	id<BUYObject> object = [nestRelationship buy_valueForJSON:expected object:branch];
+	NSDictionary *actual = [nestRelationship buy_JSONForValue:object];
+	XCTAssertEqualObjects(actual, expected);
 }
 
-- (void)testExample {
-    // This is an example of a functional test case.
-    // Use XCTAssert and related functions to verify your tests produce the correct results.
+- (void)testRecursiveRelationship
+{
+	Branch *branch = [self.modelManager buy_objectWithEntityName:BranchEntity JSONDictionary:nil];
+	NSRelationshipDescription *nestRelationship = [self relationshipWithName:@"nest" forEntity:BranchEntity];
+	NSDictionary *json = @{ @"bird_id" : @501 };
+	id object = [nestRelationship buy_valueForJSON:json object:branch];
+	XCTAssertEqualObjects(@501, [[object bird] identifier]);
+	id actual = [nestRelationship buy_JSONForValue:object];
+	XCTAssertEqualObjects(actual, json);
 }
 
-- (void)testPerformanceExample {
-    // This is an example of a performance test case.
-    [self measureBlock:^{
-        // Put the code you want to measure the time of here.
-    }];
+- (void)testToManyRelationship
+{
+	Branch *branch = [self.modelManager buy_objectWithEntityName:BranchEntity JSONDictionary:nil];
+	NSRelationshipDescription *leafRelationship = [self relationshipWithName:@"leaves" forEntity:BranchEntity];
+	id json = @[
+				@{
+					@"date" : @"2001-01-21T00:00:00 +0000",
+					@"tags" : @"test one two"
+					},
+				@{
+					@"date" : @"2010-06-11T00:00:00 +0000",
+					@"tags" : @"phone"
+					},
+				@{
+					@"date" : @"2013-11-03T00:00:00 +0000",
+					@"tags" : @"song tune album"
+					},
+				];
+	NSSet *object = [leafRelationship buy_valueForJSON:json object:branch];
+	XCTAssertTrue([object isKindOfClass:[NSSet class]]);
+	XCTAssertTrue([[object anyObject] isKindOfClass:[Leaf class]]);
+	NSSet *expected = [NSSet setWithObjects:
+					   [NSSet setWithObjects:@"test", @"one", @"two", nil],
+					   [NSSet setWithObjects:@"phone", nil],
+					   [NSSet setWithObjects:@"song", @"tune", @"album", nil],
+					   nil];
+	XCTAssertEqualObjects(expected, [object valueForKey:@"tags"]);
 }
 
 @end

Mobile Buy SDK/Mobile Buy SDK Tests/BUYTestModel.xcdatamodeld/BUYTestModel.xcdatamodel/contents

+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model userDefinedModelVersionIdentifier="" type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="10171" systemVersion="15E65" minimumToolsVersion="Xcode 7.0">
+    <entity name="Bird" representedClassName="Bird" syncable="YES">
+        <attribute name="colour" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="identifier" optional="YES" attributeType="Integer 64" defaultValueString="0" syncable="YES"/>
+        <relationship name="nests" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="Nest" inverseName="bird" inverseEntity="Nest" syncable="YES"/>
+    </entity>
+    <entity name="Branch" representedClassName="Branch" syncable="YES">
+        <attribute name="ornaments" optional="YES" attributeType="Transformable" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClass" value="NSArray"/>
+                <entry key="JSONValueTransformer" value="Array"/>
+            </userInfo>
+        </attribute>
+        <relationship name="leaves" optional="YES" toMany="YES" deletionRule="Cascade" destinationEntity="Leaf" inverseName="branch" inverseEntity="Leaf" syncable="YES"/>
+        <relationship name="nest" optional="YES" maxCount="1" deletionRule="Cascade" destinationEntity="Nest" inverseName="branch" inverseEntity="Nest" syncable="YES"/>
+        <relationship name="root" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Root" inverseName="branches" inverseEntity="Root" syncable="YES"/>
+    </entity>
+    <entity name="Leaf" representedClassName="Leaf" syncable="YES">
+        <attribute name="date" optional="YES" attributeType="Date" syncable="YES">
+            <userInfo>
+                <entry key="JSONPropertyKey" value="createDate"/>
+            </userInfo>
+        </attribute>
+        <attribute name="tags" optional="YES" attributeType="Transformable" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClass" value="NSSet"/>
+                <entry key="JSONValueTransformer" value="Set"/>
+            </userInfo>
+        </attribute>
+        <relationship name="branch" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Branch" inverseName="leaves" inverseEntity="Branch" syncable="YES"/>
+    </entity>
+    <entity name="Nest" representedClassName="Nest" syncable="YES">
+        <attribute name="eggCount" optional="YES" attributeType="Integer 16" syncable="YES"/>
+        <relationship name="bird" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Bird" inverseName="nests" inverseEntity="Bird" syncable="YES">
+            <userInfo>
+                <entry key="JSONPropertyKey" value="bird_id"/>
+            </userInfo>
+        </relationship>
+        <relationship name="branch" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="Branch" inverseName="nest" inverseEntity="Branch" syncable="YES"/>
+    </entity>
+    <entity name="Root" representedClassName="Root" syncable="YES">
+        <attribute name="age" optional="YES" attributeType="Decimal" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="identifier" optional="YES" attributeType="Integer 64" defaultValueString="0" syncable="YES"/>
+        <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="url" optional="YES" attributeType="Transformable" syncable="YES">
+            <userInfo>
+                <entry key="attributeValueClassName" value="NSURL"/>
+                <entry key="JSONTransformerName" value="BUYURL"/>
+            </userInfo>
+        </attribute>
+        <relationship name="branches" optional="YES" toMany="YES" deletionRule="Cascade" destinationEntity="Branch" inverseName="root" inverseEntity="Branch" syncable="YES"/>
+    </entity>
+    <elements>
+        <element name="Root" positionX="-63" positionY="-18" width="128" height="120"/>
+        <element name="Branch" positionX="-63" positionY="0" width="128" height="105"/>
+        <element name="Leaf" positionX="-45" positionY="18" width="128" height="90"/>
+        <element name="Bird" positionX="-36" positionY="45" width="128" height="90"/>
+        <element name="Nest" positionX="-27" positionY="54" width="128" height="90"/>
+    </elements>
+</model>
\ No newline at end of file

Mobile Buy SDK/Mobile Buy SDK Tests/TestModel.h

+//
+//  TestModel.h
+//  Mobile Buy SDK
+//
+//  Created by Brent Gulanowski on 2016-04-27.
+//  Copyright © 2016 Shopify Inc. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "BUYObjectProtocol.h"
+#import "BUYModelManagerProtocol.h"
+
+@class NSManagedObjectModel;
+
+@interface TestModelManager : NSObject<BUYModelManager>
+@property (nonatomic) NSManagedObjectModel *model;
+@end
+
+@interface TestModel : NSObject<BUYObject>
+@property (nonatomic, strong) TestModelManager *modelManager;
+@end
+
+@class Leaf, Nest;
+
+@interface Bird : TestModel
+@property (nonatomic) NSNumber *identifier;
+@property (nonatomic) NSString *colour;
++ (instancetype)birdWithIdentifier:(NSNumber *)identifier;
+@end
+
+@interface Branch : TestModel
+@property (nonatomic) NSArray<NSString *> *ornaments;
+@property (nonatomic) NSSet<Leaf *> *leaves;
+@property (nonatomic) Nest *nest;
+@end
+
+@interface Leaf : TestModel
+@property (nonatomic) NSDate *date;
+@property (nonatomic) NSSet<NSString *> *tags;
+@end
+
+@interface Nest : TestModel
+@property (nonatomic) NSNumber *eggCount;
+@property (nonatomic) Bird *bird;
+@end
+
+@interface Root : TestModel
+@property (nonatomic) NSNumber *identifier;
+@property (nonatomic) NSDecimalNumber *age;
+@property (nonatomic) NSString *name;
+@property (nonatomic) NSURL *url;
+@end

Mobile Buy SDK/Mobile Buy SDK Tests/TestModel.m

+//
+//  TestModel.m
+//  Mobile Buy SDK
+//
+//  Created by Brent Gulanowski on 2016-04-27.
+//  Copyright © 2016 Shopify Inc. All rights reserved.
+//
+
+#import "TestModel.h"
+#import "NSEntityDescription+BUYAdditions.h"
+#import <CoreData/CoreData.h>
+
+@implementation TestModelManager
+
+- (instancetype)init
+{
+	self = [super init];
+	if (self) {
+		self.model = [NSManagedObjectModel mergedModelFromBundles:@[[NSBundle bundleForClass:[self class]]]];
+	}
+	return self;
+}
+
+- (NSEntityDescription *)buy_entityWithName:(NSString *)entityName
+{
+	return self.model.entitiesByName[entityName];
+}
+
+- (Class)managedModelClassForEntityName:(NSString *)entityName
+{
+	return [[self buy_entityWithName:entityName] buy_managedObjectClass];
+}
+
+- (id<BUYObject>)buy_objectWithEntityName:(NSString *)entityName JSONDictionary:(NSDictionary *)JSON
+{
+	return [(id)[[self managedModelClassForEntityName:entityName] alloc] initWithModelManager:self JSONDictionary:JSON];
+}
+
+- (NSArray<id<BUYObject>> *)buy_objectsWithEntityName:(NSString *)entityName JSONArray:(NSArray *)JSON {
+	NSMutableArray *array = [NSMutableArray array];
+	for (NSDictionary *dict in JSON) {
+		[array addObject:[self buy_objectWithEntityName:entityName JSONDictionary:dict]];
+	}
+	return array;
+}
+
+// We don't need these methods for testing
+- (id<BUYObject>)buy_objectWithEntityName:(NSString *)entityName identifier:(NSNumber *)identifier {
+	return [entityName isEqualToString:[Bird entityName]] ? [Bird birdWithIdentifier:identifier] : nil;
+}
+
+- (NSArray<id<BUYObject>> *)buy_objectsWithEntityName:(NSString *)entityName identifiers:(NSArray *)identifiers { return nil; }
+
+- (void)buy_refreshCacheForObject:(id<BUYObject>)object {}
+
+- (BOOL)buy_purgeObject:(id<BUYObject>)object error:(NSError *__autoreleasing *)error { return YES; }
+
+- (BOOL)buy_purgeObjectsWithEntityName:(NSString *)entityName matchingPredicate:(NSPredicate *)predicate { return YES; }
+
+@end
+
+#pragma mark -
+
+@implementation TestModel
+
+@synthesize modelManager=_modelManager;
+
+- (instancetype)initWithModelManager:(id<BUYModelManager>)modelManager JSONDictionary:(NSDictionary *)dictionary
+{
+	self = [super init];
+	if (self) {
+		self.modelManager = modelManager;
+		self.JSONDictionary = dictionary;
+	}
+	return self;
+}
+
+- (NSDictionary *)JSONDictionary
+{
+	return [self.entity buy_JSONForObject:self];
+}
+
+- (void)setJSONDictionary:(NSDictionary *)JSONDictionary
+{
+	[self.entity buy_updateObject:self withJSON:JSONDictionary];
+}
+
+- (NSDictionary *)JSONEncodedProperties
+{
+	NSMutableDictionary *properties = [[self.entity buy_JSONEncodedProperties] mutableCopy];
+	for (NSString *relationshipName in self.entity.relationshipsByName) {
+		NSRelationshipDescription *relationship = properties[relationshipName];
+		if (relationship.inverseRelationship.deleteRule == NSCascadeDeleteRule) {
+			[properties removeObjectForKey:relationshipName];
+		}
+	}
+	return properties;
+}
+
++ (NSPredicate *)fetchPredicateWithJSON:(NSDictionary *)JSONDictionary
+{
+	return nil;
+}
+
++ (NSString *)entityName
+{
+	return NSStringFromClass([self class]);
+}
+
+- (NSEntityDescription *)entity
+{
+	return [self.modelManager buy_entityWithName:[[self class] entityName]];
+}
+
++ (BOOL)tracksDirtyProperties
+{
+	return NO;
+}
+
++ (BOOL)isPersistentClass
+{
+	return NO;
+}
+
+@end
+
+#pragma mark - Models
+
+@implementation Bird
+
++ (instancetype)birdWithIdentifier:(NSNumber *)identifier
+{
+	Bird *bird = [[self alloc] init];
+	bird.identifier = identifier;
+	return bird;
+}
+
+@end
+
+@implementation Branch
+@end
+
+@implementation Leaf
+@end
+
+@implementation Nest
+@end
+
+@implementation Root
+@end

Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj

@@ -119,6 +119,8 @@
 		849810971CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */; };
 		849810981CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */; };
 		849810991CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */; };
+		84CA59BC1CD1378100B2A956 /* BUYTestModel.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = 84CA59BA1CD1378100B2A956 /* BUYTestModel.xcdatamodeld */; };
+		84CA59C01CD1609400B2A956 /* TestModel.m in Sources */ = {isa = PBXBuildFile; fileRef = 84CA59BF1CD1609400B2A956 /* TestModel.m */; };
 		9003969B1B601DF400226B73 /* BUYCartLineItem.h in Headers */ = {isa = PBXBuildFile; fileRef = 900396991B601DF400226B73 /* BUYCartLineItem.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		9003969C1B601DF400226B73 /* BUYCartLineItem.m in Sources */ = {isa = PBXBuildFile; fileRef = 9003969A1B601DF400226B73 /* BUYCartLineItem.m */; };
 		900396AC1B627CB900226B73 /* BUYProductView.h in Headers */ = {isa = PBXBuildFile; fileRef = 900396AA1B627CB900226B73 /* BUYProductView.h */; };
@@ -467,6 +469,9 @@
 		8498108F1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYDeliveryRangeTransformer.m; sourceTree = "<group>"; };
 		849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYFlatCollectionTransformer.h; sourceTree = "<group>"; };
 		849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYFlatCollectionTransformer.m; sourceTree = "<group>"; };
+		84CA59BB1CD1378100B2A956 /* BUYTestModel.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = BUYTestModel.xcdatamodel; sourceTree = "<group>"; };
+		84CA59BE1CD1609400B2A956 /* TestModel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TestModel.h; sourceTree = "<group>"; };
+		84CA59BF1CD1609400B2A956 /* TestModel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TestModel.m; sourceTree = "<group>"; };
 		900396991B601DF400226B73 /* BUYCartLineItem.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYCartLineItem.h; sourceTree = "<group>"; };
 		9003969A1B601DF400226B73 /* BUYCartLineItem.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYCartLineItem.m; sourceTree = "<group>"; };
 		900396AA1B627CB900226B73 /* BUYProductView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; name = BUYProductView.h; path = "Product View/BUYProductView.h"; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
@@ -795,6 +800,7 @@
 		90F592ED1B0D5EFE0026B382 /* Mobile Buy SDK Tests */ = {
 			isa = PBXGroup;
 			children = (
+				84CA59BA1CD1378100B2A956 /* BUYTestModel.xcdatamodeld */,
 				90F592F91B0D5F4C0026B382 /* BUYApplePayAdditionsTest.m */,
 				8491102E1CCE708900E53B93 /* BUYArrayAdditionsTests.m */,
 				90F592FA1B0D5F4C0026B382 /* BUYCartTest.m */,
@@ -822,6 +828,8 @@
 				906CF1AE1B8B660F001F7D5B /* PKContact Test Objects */,
 				90F592EE1B0D5EFE0026B382 /* Supporting Files */,
 				BEB9AE721BA73E6C00575F8A /* test_shop_data.json */,
+				84CA59BE1CD1609400B2A956 /* TestModel.h */,
+				84CA59BF1CD1609400B2A956 /* TestModel.m */,
 			);
 			path = "Mobile Buy SDK Tests";
 			sourceTree = "<group>";
@@ -1487,8 +1495,10 @@
 				90BBCD731B87B6BA00FCCE51 /* BUYPKContact.m in Sources */,
 				849110331CCE708900E53B93 /* BUYStringAdditionsTests.m in Sources */,
 				906CF1B11B8B66AE001F7D5B /* BUYCNPostalAddress.m in Sources */,
+				84CA59BC1CD1378100B2A956 /* BUYTestModel.xcdatamodeld in Sources */,
 				8491103C1CCE731900E53B93 /* BUYURLAdditionsTests.m in Sources */,
 				849110401CCE9DFB00E53B93 /* BUYPropertyDescriptionAdditionsTests.m in Sources */,
+				84CA59C01CD1609400B2A956 /* TestModel.m in Sources */,
 				906CF1AD1B8B5F7D001F7D5B /* BUYNSPersonNameComponents.m in Sources */,
 				BE98DB5C1BB1F4D000C29564 /* OHHTTPStubsResponse+Helpers.m in Sources */,
 				849110311CCE708900E53B93 /* BUYArrayAdditionsTests.m in Sources */,
@@ -1948,6 +1958,19 @@
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
+
+/* Begin XCVersionGroup section */
+		84CA59BA1CD1378100B2A956 /* BUYTestModel.xcdatamodeld */ = {
+			isa = XCVersionGroup;
+			children = (
+				84CA59BB1CD1378100B2A956 /* BUYTestModel.xcdatamodel */,
+			);
+			currentVersion = 84CA59BB1CD1378100B2A956 /* BUYTestModel.xcdatamodel */;
+			path = BUYTestModel.xcdatamodeld;
+			sourceTree = "<group>";
+			versionGroupType = wrapper.xcdatamodel;
+		};
+/* End XCVersionGroup section */
 	};
 	rootObject = F773741519C770CB0039681C /* Project object */;
 }

Mobile Buy SDK/Mobile Buy SDK/Additions/NSPropertyDescription+BUYAdditions.m

@@ -65,6 +65,7 @@ static NSString * const BUYAttributeValueClassNameKey = @"attributeValueClassNam
 		[NSValueTransformer setValueTransformer:[[BUYIdentityTransformer alloc] init] forName:BUYIdentityTransformerName];
 		
 		// attribute type transformers
+		[NSValueTransformer setValueTransformer:[[BUYDateTransformer alloc] init] forName:BUYDateTransformerName];
 		[NSValueTransformer setValueTransformer:[[BUYDecimalNumberTransformer alloc] init] forName:BUYDecimalNumberTransformerName];
 		
 		// value type transformers

Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDateTransformer.m

@@ -25,6 +25,7 @@
 //
 
 #import "BUYDateTransformer.h"
+#import "NSDateFormatter+BUYAdditions.h"
 
 NSString * const BUYDateTransformerName = @"BUYDate";
 
@@ -34,6 +35,13 @@ NSString * const BUYDateTransformerName = @"BUYDate";
 
 @implementation BUYDateTransformer
 
+- (instancetype)init
+{
+	NSDateFormatter *formatter = [NSDateFormatter dateFormatterForPublications];
+	formatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+	return [self initWithDateFormatter:formatter];
+}
+
 - (instancetype)initWithDateFormatter:(NSDateFormatter *)formatter
 {
 	self = [super init];