I have a simple apex controller extension and created a basic unit test to verify the returned page reference from the controller is expected value.
When I run the test I get failure with below message - clearing showing the values do match???

System.AssertException: Assertion Failed: Page Reference should be for the Opportunity:
Expected: System.PageReference[/0065B000007l82WQAQ],
Actual: System.PageReference[/0065B000007l82WQAQ]

Here is test code:
     @isTest
     static void testOppContractCreateNotCreated() {   /* opportunity stage is not set to correct value for contract create */
        setupTestData();
        PageReference expectRef = new PageReference('/' + opp.Id);
          Test.startTest();
                stdCont = new ApexPages.Standardcontroller(opp);
            contExt = new OpportunityCreateContractContExt(stdCont);  
             PageReference createContractPageRef = Page.createAdSalesContract;
            Test.setCurrentPage(createContractPageRef);
            PageReference goToRef = contExt.getgoToContract();
            system.debug(opp);
            system.debug(goToRef);            
         Test.stopTest();
        system.assertEquals(expectRef, goToRef,'Page Reference should be for the Opportunity');
     }