GPTUtils: Prevent caching empty slot info in gptUtils and add empty info test cases (#13706)

Author: pm-nitin-nimbalkar

libraries/gptUtils/gptUtils.js

@@ -1,5 +1,5 @@
 import { CLIENT_SECTIONS } from '../../src/fpd/oneClient.js';
-import {compareCodeAndSlot, deepAccess, isGptPubadsDefined, uniques} from '../../src/utils.js';
+import {compareCodeAndSlot, deepAccess, isGptPubadsDefined, uniques, isEmpty} from '../../src/utils.js';
 
 const slotInfoCache = new Map();
 
@@ -55,7 +55,7 @@ export function getGptSlotInfoForAdUnitCode(adUnitCode) {
       divId: matchingSlot.getSlotElementId()
     };
   }
-  slotInfoCache.set(adUnitCode, info);
+  !isEmpty(info) && slotInfoCache.set(adUnitCode, info);
   return info;
 }
 

test/spec/libraries/gptUtils_spec.js

@@ -15,5 +15,7 @@ describe('gptUtils', () => {
     const second = gptUtils.getGptSlotInfoForAdUnitCode('code');
     expect(first).to.deep.equal({ gptSlot: 'code', divId: 'div-id' });
     expect(second).to.deep.equal(first);
+    const third = gptUtils.getGptSlotInfoForAdUnitCode('code1'); // not found
+    expect(third).to.deep.equal({});
   });
 });