Update test

test/unit-client/assets/javascripts/lib/xhr.test.js

@@ -42,11 +42,25 @@ describe('XHR', () => {
       const params = {}
 
       console.log('Initial history.location.search:', history.location.search);
-
+      const historyPushSpy = sinon.spy(history, 'push');
+
       XHR.updateOutlet(res, params)
-      expect(history.location.search).to.equal('')
+
       console.log('Params provided to XHR.updateOutlet:', params);
       console.log('History location after updateOutlet:', history.location);
+
+      if (historyPushSpy.called) {
+        console.log('history.push was called with:', historyPushSpy.args);
+      } else {
+        console.log('history.push was NOT called');
+      }
+
+      console.log('Final history.location.search:', history.location.search);
+
+      expect(historyPushSpy).not.to.have.been.called; 
+      expect(history.location.search).to.equal('')
+
+      historyPushSpy.restore();
     })
     it('should perform page load if unable to pushState', () => {
       sinon.stub(history, 'replace').throws('error')