add tests for cat and dogs years

src/getHumanAge.test.js

@@ -4,7 +4,31 @@ describe('getHumanAge', () => {
   const { getHumanAge } = require('./getHumanAge');
 
   test('should be declared', () => {
-    expect(getHumanAge)
-      .toBeInstanceOf(Function);
+    expect(getHumanAge).toBeInstanceOf(Function);
+  });
+
+  test('should return [0, 0] for ages less then 15', () => {
+    expect(getHumanAge(10, 10)).toEqual([0, 0]);
+  });
+
+  test('should return [1, 1] for ages between 15 and 23 ', () => {
+    expect(getHumanAge(15, 20)).toEqual([1, 1]);
+  });
+
+  test('should return [2, 2] for ages of exactly 24', () => {
+    expect(getHumanAge(24, 24)).toEqual([2, 2]);
+  });
+
+  test('should calculate additional years correctly for cats and dogs', () => {
+    expect(getHumanAge(28, 29)).toEqual([3, 3]);
+  });
+
+  test('should handle mixed ages correctly', () => {
+    expect(getHumanAge(18, 10)).toEqual([1, 0]);
+  });
+
+  test('should handle edge cases correctly', () => {
+    expect(getHumanAge(15, 15)).toEqual([1, 1]);
+    expect(getHumanAge(25, 25)).toEqual([2, 2]);
   });
 });