GumGum adapter: push first indexed value in sizes array to bidRespons…

…es.height and width (#4006)

* changed resizing unit tests to return the first size dimensions in the sizes array

* added some changes

modules/gumgumBidAdapter.js

@@ -175,7 +175,7 @@ function buildRequests (validBidRequests, bidderRequest) {
       tId: transactionId,
       pi: data.pi,
       selector: params.selector,
-      sizes: bidRequest.sizes,
+      sizes: bidRequest.sizes || bidRequest.mediatype[banner].sizes,
       url: BID_ENDPOINT,
       method: 'GET',
       data: Object.assign(data, _getBrowserParams(), _getDigiTrustQueryParams(), _getTradeDeskIDParam(bidRequest))
@@ -221,7 +221,7 @@ function interpretResponse (serverResponse, bidRequest) {
   let [width, height] = sizes[0].split('x')
 
   // return 1x1 when breakout expected
-  if ((product === 2 || product === 5) && includes(sizes, '1x1')) {
+  if (product === 5 && includes(sizes, '1x1')) {
     width = '1'
     height = '1'
   }

test/spec/modules/gumgumBidAdapter_spec.js

@@ -245,8 +245,8 @@ describe('gumgumAdapter', function () {
         'thms': 10000
       }
       let result = spec.interpretResponse({ body: inscreenServerResponse }, inscreenBidRequest);
-      expect(result[0].width).to.equal('1');
-      expect(result[0].height).to.equal('1');
+      expect(result[0].width).to.equal(inscreenBidRequest.sizes[0][0].toString());
+      expect(result[0].height).to.equal(inscreenBidRequest.sizes[0][1].toString());
     })
   })
   describe('getUserSyncs', function () {