Add test for NSUUID equality

Author: 0xced

CoreFoundation/Base.subproj/ForSwiftFoundationOnly.h

@@ -209,6 +209,7 @@ extern void _CFURLInitWithFileSystemPathRelativeToBase(CFURLRef url, CFStringRef
 extern Boolean _CFURLInitWithURLString(CFURLRef url, CFStringRef string, Boolean checkForLegalCharacters, _Nullable CFURLRef baseURL);
 extern Boolean _CFURLInitAbsoluteURLWithBytes(CFURLRef url, const UInt8 *relativeURLBytes, CFIndex length, CFStringEncoding encoding, _Nullable CFURLRef baseURL);
 
+extern CFHashCode CFHashBytes(uint8_t *bytes, CFIndex length);
 extern CFIndex __CFProcessorCount();
 extern uint64_t __CFMemorySize();
 extern CFIndex __CFActiveProcessorCount();

Foundation/NSUUID.swift

@@ -62,4 +62,18 @@ public class NSUUID : NSObject, NSCopying, NSSecureCoding, NSCoding {
     public func encodeWithCoder(aCoder: NSCoder) {
 
     }
+    
+    public override func isEqual(object: AnyObject?) -> Bool {
+        if object === self {
+            return true
+        } else if let other = object as? NSUUID {
+            return _cf_uuid_compare(buffer, other.buffer) == 0
+        } else {
+            return false
+        }
+    }
+    
+    public override var hash: Int {
+        return Int(CFHashBytes(buffer, 16))
+    }
 }

TestFoundation/TestNSUUID.swift

@@ -21,6 +21,18 @@ class TestNSUUID : XCTestCase {
 
     var allTests : [(String, () -> ())] {
         return [
+            ("test_Equality", test_Equality),
         ]
     }
+    
+    func test_Equality() {
+        let uuidA = NSUUID(UUIDString: "E621E1F8-C36C-495A-93FC-0C247A3E6E5F")
+        let uuidB = NSUUID(UUIDString: "e621e1f8-c36c-495a-93fc-0c247a3e6e5f")
+        let uuidC = NSUUID(UUIDBytes: [0xe6,0x21,0xe1,0xf8,0xc3,0x6c,0x49,0x5a,0x93,0xfc,0x0c,0x24,0x7a,0x3e,0x6e,0x5f])
+        let uuidD = NSUUID()
+        
+        XCTAssertEqual(uuidA, uuidB, "String case must not matter.")
+        XCTAssertEqual(uuidA, uuidC, "A UUID initialized with a string must be equal to the same UUID initialized with its UnsafePointer<UInt8> equivalent representation.")
+        XCTAssertNotEqual(uuidC, uuidD, "Two different UUIDs must not be equal.")
+    }
 }