Add test case for recursive models from @cspickert

MantleTests/MTLJSONAdapterSpec.m

@@ -591,4 +591,19 @@ + (NSValueTransformer *)NSDateJSONTransformer {
 	expect(weakTransformer).toEventually(beNil());
 });
 
+it(@"should support recursive models", ^{
+	NSDictionary *dictionary = @{
+		@"owner": @{@"name": @"Cameron"},
+		@"users": @[
+			@{@"name": @"Dimitri"},
+			@{@"name": @"John"},
+		],
+	};
+
+	NSError *error = nil;
+	MTLRecursiveGroupModel *group = [MTLJSONAdapter modelOfClass:[MTLRecursiveGroupModel class] fromJSONDictionary:dictionary error:&error];
+	expect(group).notTo(beNil());
+	expect(@(group.users.count)).to(equal(@2));
+});
+
 QuickSpecEnd

MantleTests/MTLTestModel.h

@@ -184,3 +184,18 @@ extern const NSInteger MTLTestModelNameMissing;
 @property (readwrite, nonatomic, strong) id optionalImplementedProperty;
 
 @end
+
+
+@interface MTLRecursiveUserModel : MTLModel <MTLJSONSerializing>
+
+@property (nonatomic, copy, readonly) NSString *name;
+@property (nonatomic, copy, readonly) NSArray *groups;
+
+@end
+
+@interface MTLRecursiveGroupModel : MTLModel <MTLJSONSerializing>
+
+@property (nonatomic, readonly) MTLRecursiveUserModel *owner;
+@property (nonatomic, readonly) NSArray *users;
+
+@end

MantleTests/MTLTestModel.m

@@ -472,3 +472,31 @@ - (NSString *)flavor {
 @implementation MTLOptionalPropertyModel
 
 @end
+
+@implementation MTLRecursiveUserModel
+
++ (NSDictionary *)JSONKeyPathsByPropertyKey {
+	return @{@"name": @"name", @"groups": @"groups"};
+}
+
++ (NSValueTransformer *)groupsJSONTransformer {
+	return [MTLJSONAdapter arrayTransformerWithModelClass:[MTLRecursiveGroupModel class]];
+}
+
+@end
+
+@implementation MTLRecursiveGroupModel
+
++ (NSDictionary *)JSONKeyPathsByPropertyKey {
+	return @{@"owner": @"owner", @"users": @"users"};
+}
+
++ (NSValueTransformer *)ownerJSONTransformer {
+	return [MTLJSONAdapter dictionaryTransformerWithModelClass:[MTLRecursiveUserModel class]];
+}
+
++ (NSValueTransformer *)usersJSONTransformer {
+	return [MTLJSONAdapter arrayTransformerWithModelClass:[MTLRecursiveUserModel class]];
+}
+
+@end