NSJSONSerialization.data(...) fatalErrors on bad input to match objc behavior

Author: glenna

Foundation/JSONSerialization.swift

@@ -139,13 +139,7 @@ open class JSONSerialization : NSObject {
         } else if let container = value as? Dictionary<AnyHashable, Any> {
             try writer.serializeJSON(container)
         } else {
-            if stream {
-                throw NSError(domain: NSCocoaErrorDomain, code: CocoaError.propertyListReadCorrupt.rawValue, userInfo: [
-                    "NSDebugDescription" : "Top-level object was not NSArray or NSDictionary"
-                    ])
-            } else {
-                fatalError("Top-level object was not NSArray or NSDictionary") // This is a fatal error in objective-c too (it is an NSInvalidArgumentException)
-            }
+            fatalError("Top-level object was not NSArray or NSDictionary") // This is a fatal error in objective-c too (it is an NSInvalidArgumentException)
         }
 
         let count = jsonStr.lengthOfBytes(using: .utf8)

TestFoundation/TestJSONSerialization.swift

@@ -945,7 +945,6 @@ extension TestJSONSerialization {
             ("test_jsonReadingOffTheEndOfBuffers", test_jsonReadingOffTheEndOfBuffers),
             ("test_jsonObjectToOutputStreamBuffer", test_jsonObjectToOutputStreamBuffer),
             ("test_jsonObjectToOutputStreamFile", test_jsonObjectToOutputStreamFile),
-            ("test_invalidJsonObjectToStreamBuffer", test_invalidJsonObjectToStreamBuffer),
             ("test_jsonObjectToOutputStreamInsufficientBuffer", test_jsonObjectToOutputStreamInsufficientBuffer),
             ("test_booleanJSONObject", test_booleanJSONObject),
             ("test_serialize_dictionaryWithDecimal", test_serialize_dictionaryWithDecimal),
@@ -1315,14 +1314,6 @@ extension TestJSONSerialization {
         }
     }
 
-    func test_invalidJsonObjectToStreamBuffer() {
-        let str = "Invalid JSON"
-        let buffer = Array<UInt8>(repeating: 0, count: 10)
-        let outputStream = OutputStream(toBuffer: UnsafeMutablePointer(mutating: buffer), capacity: buffer.count)
-        outputStream.open()
-        XCTAssertThrowsError(try JSONSerialization.writeJSONObject(str, toStream: outputStream, options: []))
-    }
-    
     func test_booleanJSONObject() {
         do {
             let objectLikeBoolArray = try JSONSerialization.data(withJSONObject: [true, NSNumber(value: false), NSNumber(value: true)] as Array<Any>)