Fix #28

Add a test and fix for issue #28. Value arrays now get successfully
parsed using formatters.

Author: christianklotz

Classes/JSONAPIResourceParser.m

@@ -215,8 +215,8 @@ + (void)set:(NSObject <JSONAPIResource> *)resource withDictionary:dictionary {
 
                 if ([value isKindOfClass:[NSArray class]]) {
                     if (format) {
-                        NSMutableArray *temp = [value copy];
-                        for (int i=0; i < [value length]; ++i) {
+                        NSMutableArray *temp = [value mutableCopy];
+                        for (int i = 0; i < [value count]; ++i) {
                             id xformed;
                             if ([format getObjectValue:&xformed forString:temp[i] errorDescription:&error]) {
                                 temp[i] = xformed;

Project/JSONAPI/ArticleResource.h

@@ -17,4 +17,6 @@
 @property (nonatomic, strong) NSDate *date;
 @property (nonatomic, strong) NSArray *comments;
 
+@property (nonatomic, strong) NSArray *versions;
+
 @end

Project/JSONAPI/ArticleResource.m

@@ -33,6 +33,9 @@ + (JSONAPIResourceDescriptor*)descriptor {
 
         [__descriptor hasOne:[PeopleResource class] withName:@"author"];
         [__descriptor hasMany:[CommentResource class] withName:@"comments"];
+
+        [__descriptor addProperty:@"versions"
+                  withDescription:[[JSONAPIPropertyDescriptor alloc] initWithJsonName:@"versions" withFormat:[NSDateFormatter RFC3339DateFormatter]]];
     });
 
     return __descriptor;

Project/JSONAPITests/JSONAPITests.m

@@ -55,6 +55,7 @@ - (void)testDataArticles {
     XCTAssert([article isKindOfClass:[ArticleResource class]], @"Article should be a ArticleResource");
     XCTAssertEqualObjects(article.ID, @"1", @"Article id should be 1");
     XCTAssertEqualObjects(article.title, @"JSON API paints my bikeshed!", @"Article title should be 'JSON API paints my bikeshed!'");
+    XCTAssertNotNil(article.versions, @"Article versions should contain an array of dates");
 }
 
 - (void)testIncludedPeopleAndComments {

Project/JSONAPITests/main_example.json

@@ -11,7 +11,11 @@
     "type": "articles",
     "id": "1",
     "attributes": {
-			 "title": "JSON API paints my bikeshed!"
+			 "title": "JSON API paints my bikeshed!",
+             "versions": [
+                "2015-09-01T12:15:00Z",
+                "2015-08-01T06:15:00Z"
+             ]
     },
     "relationships": {
 			 "author": {