fix a bug when the iframe locator is not present on page (#4637)

* fix a bug when the iframe locator is not present on page

* clean up

Author: mkendall07

modules/consentManagementUsp.js

@@ -63,27 +63,26 @@ function lookupUspConsent(uspSuccess, uspError, hookConfig) {
   // - use the USPAPI locator code to see if USP's located in the current window or an ancestor window. This works in friendly or cross domain iframes
   // - if USPAPI is not found, the iframe function will call the uspError exit callback to abort the rest of the USPAPI workflow
   // - try to call the __uspapi() function directly, otherwise use the postMessage() api
-
   // find the CMP frame/window
-  let f = window;
-  let uspapiFrame;
-  while (!uspapiFrame) {
-    try {
-      if (f.frames['__uspapiLocator']) uspapiFrame = f;
-    } catch (e) { }
-    if (f === window.top) break;
-    f = f.parent;
-  }
-
-  if (!uspapiFrame) {
-    return uspError('USP CMP not found.', hookConfig);
-  }
 
   try {
     // try to call __uspapi directly
-    uspapiFrame.__uspapi('getUSPData', USPAPI_VERSION, callbackHandler.consentDataCallback);
+    window.__uspapi('getUSPData', USPAPI_VERSION, callbackHandler.consentDataCallback);
   } catch (e) {
     // must not have been accessible, try using postMessage() api
+    let f = window;
+    let uspapiFrame;
+    while (!uspapiFrame) {
+      try {
+        if (f.frames['__uspapiLocator']) uspapiFrame = f;
+      } catch (e) { }
+      if (f === window.top) break;
+      f = f.parent;
+    }
+
+    if (!uspapiFrame) {
+      return uspError('USP CMP not found.', hookConfig);
+    }
     callUspApiWhileInIframe('getUSPData', uspapiFrame, callbackHandler.consentDataCallback);
   }
 

test/spec/modules/consentManagementUsp_spec.js

@@ -245,6 +245,48 @@ describe('consentManagement', function () {
       }
     });
 
+    describe('test without iframe locater', function() {
+      let uspapiStub = sinon.stub();
+
+      beforeEach(function () {
+        didHookReturn = false;
+        sinon.stub(utils, 'logError');
+        sinon.stub(utils, 'logWarn');
+        window.__uspapi = function() {};
+      });
+
+      afterEach(function () {
+        config.resetConfig();
+        $$PREBID_GLOBAL$$.requestBids.removeAll();
+        uspapiStub.restore();
+        utils.logError.restore();
+        utils.logWarn.restore();
+        delete window.__uspapi;
+        resetConsentData();
+      });
+
+      it('Workflow for normal page withoout iframe locater', function() {
+        let testConsentData = {
+          uspString: '1NY'
+        };
+
+        uspapiStub = sinon.stub(window, '__uspapi').callsFake((...args) => {
+          args[2](testConsentData, true);
+        });
+
+        setConsentConfig(goodConfig);
+        requestBidsHook(() => { didHookReturn = true; }, {});
+
+        let consent = uspDataHandler.getConsentData();
+
+        sinon.assert.notCalled(utils.logWarn);
+        sinon.assert.notCalled(utils.logError);
+
+        expect(didHookReturn).to.be.true;
+        expect(consent).to.equal(testConsentData.uspString);
+      });
+    });
+
     describe('USPAPI workflow for normal pages:', function () {
       let uspapiStub = sinon.stub();
       let ifr = null;