tests: checks factorial code (#304)

Author: anthonydmays

lesson_07/conditionals/src/lesson7.test.ts

@@ -1,6 +1,7 @@
 import {
   binarySearch,
   compareStrings,
+  computeFactorial,
   getFirstNFibonacciNumbers,
 } from "./lesson7.js";
 
@@ -42,4 +43,20 @@ describe("Lesson7 Tests", () => {
     // Test for value not present in the array
     expect(binarySearch(values, 0, values.length - 1, 4)).toBe(-1);
   });
+  test("testComputeFactorial", () => {
+    // Test for n = 0 (edge case)
+    expect(computeFactorial(0)).toBe(1);
+
+    // Test for n = 1
+    expect(computeFactorial(1)).toBe(1);
+
+    // Test for n = 5
+    expect(computeFactorial(5)).toBe(120);
+
+    // Test for n = 10
+    expect(computeFactorial(10)).toBe(3628800);
+
+    // Test for negative n (edge case)
+    expect(computeFactorial(-5)).toBe(0);
+  });
 });