test(utils): add deepMerge spec test

Author: brandyscarney

core/src/utils/helpers.spec.ts

@@ -1,4 +1,4 @@
-import { inheritAriaAttributes } from './helpers';
+import { deepMerge, inheritAriaAttributes } from './helpers';
 
 describe('inheritAriaAttributes', () => {
   it('should inherit aria attributes', () => {
@@ -40,3 +40,26 @@ describe('inheritAriaAttributes', () => {
     });
   });
 });
+
+describe('deepMerge', () => {
+  it('should merge objects', () => {
+    const target = { a: 1, b: 2 };
+    const source = { b: 3, c: 4 };
+    const result = deepMerge(target, source);
+    expect(result).toEqual({ a: 1, b: 3, c: 4 });
+  });
+
+  it('should merge objects when target is undefined', () => {
+    const target = undefined;
+    const source = { a: 1, b: 2 };
+    const result = deepMerge(target, source);
+    expect(result).toEqual({ a: 1, b: 2 });
+  });
+
+  it('should merge objects when source is undefined', () => {
+    const target = { a: 1, b: 2 };
+    const source = undefined;
+    const result = deepMerge(target, source);
+    expect(result).toEqual({ a: 1, b: 2 });
+  });
+});

core/src/utils/helpers.ts

@@ -461,10 +461,9 @@ export const openURL = async (
  * Deep merges two objects, with source properties overriding target properties
  * @param target The target object to merge into
  * @param source The source object to merge from
- * @returns The merged object (new object, doesn't modify original)
+ * @returns The merged object
  */
 export const deepMerge = (target: any, source: any): any => {
-  // Create a new object to avoid modifying the original
   const result = { ...target };
 
   for (const key in source) {