Update hasKey snippet to handle failing scenario and add new tests

test/hasKey.test.js

@@ -1,7 +1,10 @@
 const {hasKey} = require('./_30s.js');
 
 const data = {
-  a: 1, b: { c: 4 }, 'd.e': 5
+  a: 1,
+  b: { c: 4 },
+  'd.e': 5,
+  'b.d': 2,
 };
 
 test('hasKey is a Function', () => {
@@ -9,25 +12,33 @@ test('hasKey is a Function', () => {
 });
 
 test('hasKey returns true for simple property', () => {
-  expect(hasKey(data, 'a')).toBe(true);
+  expect(hasKey(data, ['a'])).toBe(true);
 });
 
 test('hasKey returns true for object property', () => {
-  expect(hasKey(data, 'b')).toBe(true);
+  expect(hasKey(data, ['b'])).toBe(true);
 });
 
 test('hasKey returns true for nested property', () => {
-  expect(hasKey(data, 'b.c')).toBe(true);
+  expect(hasKey(data, ['b', 'c'])).toBe(true);
 });
 
 test('hasKey returns true for property with dots', () => {
-  expect(hasKey(data, 'd.e')).toBe(true);
+  expect(hasKey(data, ['d.e'])).toBe(true);
+});
+
+test('hasKey returns true for property with dots and same sibling key', () => {
+  expect(hasKey(data, ['b.d'])).toBe(true);
 });
 
 test('hasKey returns false for non-existent property', () => {
-  expect(hasKey(data, 'f')).toBe(true);
+  expect(hasKey(data, ['f'])).toBe(false);
 });
 
 test('hasKey returns false for virtual nested property', () => {
-  expect(hasKey(data, 'd')).toBe(false);
+  expect(hasKey(data, ['d'])).toBe(false);
+});
+
+test('hasKey returns false for empty key list', () => {
+  expect(hasKey(data, [])).toBe(false);
 });