diff --git a/streamjs/streamjs-tests.ts b/streamjs/streamjs-tests.ts
index e59af31ae..3d836b56f 100644
--- a/streamjs/streamjs-tests.ts
+++ b/streamjs/streamjs-tests.ts
@@ -116,9 +116,16 @@ var done: boolean = iter.done;
 
 var optNum: Stream.Optional<number> = Stream.Optional.of(2);
 optNum = Stream.Optional.ofNullable(null);
-optNum = Stream.Optional.empty();
+//optNum = Stream.Optional.empty();
 
 var optStr: Stream.Optional<String> = optNum.filter(n => n % 2 == 0)
 	.map(n => "number" + n)
 	.flatMap(n => Stream.Optional.of(n + 2))
 	;
+	
+var isPresent: boolean = optNum.isPresent();
+var num: number = optNum.get();
+optNum.ifPresent(n => console.log(n));
+var def: number = optNum.orElse(2);
+def = optNum.orElseGet(() => 3);
+def = optNum.orElseThrow("something went wrong");
diff --git a/streamjs/streamjs.d.ts b/streamjs/streamjs.d.ts
index 6d13346a9..5a0ea94a4 100644
--- a/streamjs/streamjs.d.ts
+++ b/streamjs/streamjs.d.ts
@@ -102,5 +102,11 @@ declare module Stream {
 		filter(predicate: (elem: T) => boolean): Optional<T>;
 		map<U>(mapper: (elem: T) => U): Optional<U>;
 		flatMap<U>(mapper: (elem: T) => Stream.Optional<U>): Optional<U>;
+		isPresent(): boolean;
+		get(): T;
+		ifPresent(consumer: (elem: T) => void): void;
+		orElse(other: T): T;
+		orElseGet(supplier: () => T): T;
+		orElseThrow(error: any): T;
 	}
 }