diff --git a/getPositiveSum.test.js b/getPositiveSum.test.js
new file mode 100644
index 00000000..001b7bf6
--- /dev/null
+++ b/getPositiveSum.test.js
@@ -0,0 +1,9 @@
+const getPositiveSum = require('./getPositiveSum');
+
+describe('getPositiveSum', () => {
+  it('should return the correct sum of positive numbers', () => {
+    const numbers = [2, -4, 6, -8, 10, -12];
+    const positiveSum = getPositiveSum(numbers);
+    expect(positiveSum).toBe(18);
+  });
+});
diff --git a/index.js b/index.js
index ff28a6f9..75dd223a 100644
--- a/index.js
+++ b/index.js
@@ -1,22 +1,34 @@
-class NumberArray {
-  constructor(numbers) {
-    this.numbers = numbers;
-  }
+// class NumberArray {
+//   constructor(numbers) {
+//     this.numbers = numbers;
+//   }
 
-  getPositiveSum() {
-    let sum = 0;
-    for (let number of this.numbers) {
-      if (number > 0) {
-        sum += number;
-      }
-    }
-    return sum;
-  }
-}
+//   getPositiveSum() {
+//     let sum = 0;
+//     for (let number of this.numbers) {
+//       if (number > 0) {
+//         sum += number;
+//       }
+//     }
+//     return sum;
+//   }
+// }
+
+// const numbers = [2, -4, 6, -8, 10, -12];
+// const numberArray = new NumberArray(numbers);
+// const positiveSum = numberArray.getPositiveSum();
+
+// // Input: [2, -4, 6, -8, 10, -12]
+// // Output: 18
 
 const numbers = [2, -4, 6, -8, 10, -12];
-const numberArray = new NumberArray(numbers);
-const positiveSum = numberArray.getPositiveSum();
 
-// Input: [2, -4, 6, -8, 10, -12]
-// Output: 18
+const getPositiveSum = (numbers) => {
+  return numbers
+    .filter((number) => number > 0) 
+    .reduce((sum, number) => sum + number, 0); 
+};
+module.exports = getPositiveSum;
+const positiveSum = getPositiveSum(numbers);
+
+console.log(positiveSum);
\ No newline at end of file