Yusup R.

task-1/count-above-threshold.js

@@ -1 +1,26 @@
-//Your code here
+function countAboveThreshold(numbers, threshold) {
+  // Return the count of numbers greater than the threshold
+  // If the array is empty, return `0`
+  //Assume the input is valid
+    let count = 0;
+
+    for (const num of numbers) {
+        if (num > threshold) {
+            count++;
+        }
+    }
+
+    return count;
+}
+
+/*
+example usage:
+countAboveThreshold([1,5,10,3],4)// returns 2
+countAboveThreshold([7,8,9],10)// returns 0
+countAboveThreshold([],5)// returns 0
+*/
+
+console.log(countAboveThreshold([1,5,10,3],4)); 
+console.log(countAboveThreshold([7,8,9],10)); 
+console.log(countAboveThreshold([],5)); 
+

task-2/calculateAverage.js

@@ -17,4 +17,4 @@ export function calculateAverage(numbers) {
   }
 
   return sum / numbers.length;
-}
+}

task-2/calculateAverage.test.js

@@ -0,0 +1,25 @@
+import { describe, it, expect } from "vitest";
+import { calculateAverage } from "./calculateAverage.js";
+
+describe("calculateAverage", () => {
+  it("normal case - valid numbers", () => {
+    expect(calculateAverage([2, 4, 6])).toBe(4);
+  });
+
+  it("single number array", () => {
+    expect(calculateAverage([5])).toBe(5);
+  });
+
+  it("empty array → null", () => {
+    expect(calculateAverage([])).toBeNull();
+  });
+
+  it("non-array input → null", () => {
+    expect(calculateAverage("123")).toBeNull();
+    expect(calculateAverage(null)).toBeNull();
+  });
+
+  it("array with non-number → null", () => {
+    expect(calculateAverage([1, 2, "3"])).toBeNull();  
+  });
+});