AllowFragments to be decoded

Author: argon

Foundation/NSJSONSerialization.swift

@@ -126,6 +126,9 @@ public class NSJSONSerialization : NSObject {
         else if let (array, _) = try reader.parseArray(0) {
             return array
         }
+        else if opt.contains(.AllowFragments), let (value, _) = try reader.parseValue(0) {
+            return value
+        }
         throw NSError(domain: NSCocoaErrorDomain, code: NSCocoaError.PropertyListReadCorruptError.rawValue, userInfo: [
             "NSDebugDescription" : "JSON text did not start with array or object and option to allow fragments not set."
         ])

TestFoundation/TestNSJSONSerialization.swift

@@ -100,6 +100,8 @@ extension TestNSJSONSerialization {
             ("test_deserialize_simpleEscapeSequences", test_deserialize_simpleEscapeSequences),
             ("test_deserialize_unicodeEscapeSequence", test_deserialize_unicodeEscapeSequence),
             ("test_deserialize_unicodeSurrogatePairEscapeSequence", test_deserialize_unicodeSurrogatePairEscapeSequence),
+
+            ("test_deserialize_allowFragments", test_deserialize_allowFragments),
 
             ("test_deserialize_unterminatedObjectString", test_deserialize_unterminatedObjectString),
             ("test_deserialize_missingObjectKey", test_deserialize_missingObjectKey),
@@ -297,6 +299,23 @@ extension TestNSJSONSerialization {
         }
     }
 
+    func test_deserialize_allowFragments() {
+        let subject = "3"
+        
+        do {
+            for encoding in supportedEncodings {
+                guard let data = subject.bridge().dataUsingEncoding(encoding) else {
+                    XCTFail("Unable to convert string to data")
+                    return
+                }
+                let result = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments) as? Double
+                XCTAssertEqual(result, 3)
+            }
+        } catch {
+            XCTFail("Unexpected error: \(error)")
+        }
+    }
+    
     //MARK: - Parsing Errors
     func test_deserialize_unterminatedObjectString() {
         let subject = "{\"}"