         
         XCTAssertEqual(queue.count, 0)
         
-        for var i = 100; i < 200; i += 1 {
+        for i in 100 ..< 200 {
             queue.enqueue(i)
             
             let allElements = Array(queue)

            XCTAssertEqual(queue.count, i - 100 + 1)
        }
        
        for var i = 100; i < 200; i += 1 {
            let allElements2 = Array(queue)
            let correct2 = Array(i ... 199)
            

        
        XCTAssertEqual(queue.count, 0)
        
        for i in 0 ..< 200000 {
            queue.enqueue(i)
        }
        
