[MWPW-159328] handle a case where there are not placeholders available (

adobecom#2998)

* [MWPW-159328] handle a case where there are not palceholders availble

* fixed typos

---------

Co-authored-by: Denys Fedotov <dfedotov@Denyss-MacBook-Pro.local>

libs/features/personalization/personalization.js

@@ -154,7 +154,7 @@ export function replacePlaceholders(value, placeholders) {
   if (!matches) return val;
   matches.forEach((match) => {
     const key = match.replace(/{{|}}/g, '').trim();
-    if (placeholders[key]) val = val.replace(match, placeholders[key]);
+    if (placeholders?.[key]) val = val.replace(match, placeholders[key]);
   });
   return val;
 }

test/features/personalization/parseNestedPlaceholders.test.js

@@ -1,5 +1,5 @@
 import { expect } from '@esm-bundle/chai';
-import { parseNestedPlaceholders, createContent } from '../../../libs/features/personalization/personalization.js';
+import { parseNestedPlaceholders, createContent, replacePlaceholders } from '../../../libs/features/personalization/personalization.js';
 import { getConfig } from '../../../libs/utils/utils.js';
 
 const config = getConfig();
@@ -29,3 +29,15 @@ describe('test createContent', () => {
     expect(newContent.innerHTML).to.equal('50');
   });
 });
+describe('replacePlaceholders()', () => {
+  it('should replace placeholders', () => {
+    const str = 'Buy now and save {{promo-discount}}% off {{promo-product-name}}.';
+    const newStr = replacePlaceholders(str, config.placeholders);
+    expect(newStr).to.equal('Buy now and save 50% off CC All Apps.');
+  });
+  it('should not break when there are no placeholders available', () => {
+    const str = 'For just {{promo-price}}, get 20+...';
+    const newStr = replacePlaceholders(str, null);
+    expect(newStr).to.equal(str);
+  });
+});