test: add test tween unit

Author: hoonsbory

src/tests.ts

@@ -2066,45 +2066,62 @@ export const tests = {
 		TWEEN.removeAll()
 
 		const t = new TWEEN.Tween({x: 1}),
-			t2 = new TWEEN.Tween({x: 1}, true),
+			t2 = new TWEEN.Tween({x: 1}),
+			t3 = new TWEEN.Tween({x: 1}),
 			group = new TWEEN.Group()
 		let groupCounter = 0,
 			childCounter = 0,
-			childCounter2 = 0
+			childCounter2 = 0,
+			childCounter3 = 0
 
 		group.add(t)
 		group.add(t2)
+		group.add(t3)
 
 		t.to({x: 2}, 1000)
 		t2.to({x: 2}, 2000)
+		t3.to({x: 2}, 3000)
 
 		t.onComplete(function (): void {
 			childCounter++
 		})
 		t2.onComplete(function (): void {
 			childCounter2++
 		})
+		t3.onComplete(function (): void {
+			childCounter3++
+		})
 		group.onComplete(function (): void {
 			groupCounter++
 		})
 
 		t.start(0)
 		t2.start(0)
+		t3.start(0)
 
 		group.update(0)
 		test.deepEqual(groupCounter, 0)
 		test.deepEqual(childCounter, 0)
 		test.deepEqual(childCounter2, 0)
+		test.deepEqual(childCounter3, 0)
 
 		group.update(1000)
 		test.deepEqual(groupCounter, 0)
 		test.deepEqual(childCounter, 1)
 		test.deepEqual(childCounter2, 0)
+		test.deepEqual(childCounter3, 0)
 
 		group.update(2000)
 		test.deepEqual(childCounter, 1)
+		test.deepEqual(groupCounter, 0)
+		test.deepEqual(childCounter2, 1)
+		test.deepEqual(childCounter3, 0)
+
+		group.update(3000)
 		test.deepEqual(groupCounter, 1)
+		test.deepEqual(childCounter, 1)
 		test.deepEqual(childCounter2, 1)
+		test.deepEqual(childCounter3, 1)
 		test.done()
 	},