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How do you clear the ApexPages.getMessages() collection in a test?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Moderator Election Q&A - Questionnaire
2019 Community Moderator Election ResultsHow do you unit test a trigger when you don't know the required fields?Clear Apex:PageMessages without losing viewstateModifying the trigger collection fieldsHow to test page messages in unit test?How to clear the Info message appearing on the Lookup popup windowtest class fails system.assert but manual upload performs as expectedHow to use clear list when the list returns something that is used for other operations?Clear inputs after saveStrange and hard to reproduce redirect for Visualforce pages in LEX back to the loginpage since Summer'18How to clear the filename and value of apex:inputFile



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5















The longtime frustration of not being able to clear the messages in tests is marked as a delivered idea in Summer '18 here Add support for clearing PageMessages via Apex.



A failing of that forum is that there never seems to be a link to what was actually done, leaving you back in Google land trying to figure out what that was. In this case I haven't found any new methods in the documentation, and can confirm that the second assert here fails using API 45:



 System.assert(ApexPages.getMessages().size() > 0);
ApexPages.getMessages().clear();
System.assert(ApexPages.getMessages().size() == 0);


So how are the messages cleared?










share|improve this question




























    5















    The longtime frustration of not being able to clear the messages in tests is marked as a delivered idea in Summer '18 here Add support for clearing PageMessages via Apex.



    A failing of that forum is that there never seems to be a link to what was actually done, leaving you back in Google land trying to figure out what that was. In this case I haven't found any new methods in the documentation, and can confirm that the second assert here fails using API 45:



     System.assert(ApexPages.getMessages().size() > 0);
    ApexPages.getMessages().clear();
    System.assert(ApexPages.getMessages().size() == 0);


    So how are the messages cleared?










    share|improve this question
























      5












      5








      5








      The longtime frustration of not being able to clear the messages in tests is marked as a delivered idea in Summer '18 here Add support for clearing PageMessages via Apex.



      A failing of that forum is that there never seems to be a link to what was actually done, leaving you back in Google land trying to figure out what that was. In this case I haven't found any new methods in the documentation, and can confirm that the second assert here fails using API 45:



       System.assert(ApexPages.getMessages().size() > 0);
      ApexPages.getMessages().clear();
      System.assert(ApexPages.getMessages().size() == 0);


      So how are the messages cleared?










      share|improve this question














      The longtime frustration of not being able to clear the messages in tests is marked as a delivered idea in Summer '18 here Add support for clearing PageMessages via Apex.



      A failing of that forum is that there never seems to be a link to what was actually done, leaving you back in Google land trying to figure out what that was. In this case I haven't found any new methods in the documentation, and can confirm that the second assert here fails using API 45:



       System.assert(ApexPages.getMessages().size() > 0);
      ApexPages.getMessages().clear();
      System.assert(ApexPages.getMessages().size() == 0);


      So how are the messages cleared?







      apex visualforce pagemessages






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 1 hour ago









      Keith CKeith C

      96.8k1097216




      96.8k1097216




















          2 Answers
          2






          active

          oldest

          votes


















          5














          It was easy enough to find the Release Note for this feature by looking at Development > Apex.




          Clear Messages on Visualforce Pages While Testing



          Use the new System.Test.clearApexPageMessages() method to clear the messages on a Visualforce page while executing Apex test methods.



          Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.



          Why: You can use the System.Test.clearApexPageMessages() method to test the success or failure of each call to controller methods. Using this function along with the ApexPages.hasMessages() and ApexPages.getMessages() methods allows you to test Visualforce controllers more easily.




          This method is also included in the documentation on the Test Class:




          clearApexPageMessages()

          Clear the messages on a Visualforce page while executing Apex test methods.



          Signature

          public static void clearApexPageMessages()



          Return Value

          Type: void



          Usage

          This method may only be used in tests.



          Example



          @isTest
          static void clearMessagesTest()
          Test.setCurrentPage(new PageReference('/'));
          ApexPages.addMessage(
          new ApexPages.Message(ApexPages.Severity.WARNING, 'Sample Warning')
          );
          System.assertEquals(1, ApexPages.getMessages().size());
          Test.clearApexPageMessages();
          System.assertEquals(0, ApexPages.getMessages().size());







          share|improve this answer























          • Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

            – Keith C
            1 hour ago



















          4














          OK, with a different set of keywords I hit this Clear Messages on Visualforce Pages While Testing release note that talks about the Test.clearApexPageMessages() method. That is explained in the Test Class documentation.



          And happy days, both these assertions pass:



           System.assert(ApexPages.getMessages().size() > 0);
          Test.clearApexPageMessages();
          System.assert(ApexPages.getMessages().size() == 0);





          share|improve this answer























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            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            5














            It was easy enough to find the Release Note for this feature by looking at Development > Apex.




            Clear Messages on Visualforce Pages While Testing



            Use the new System.Test.clearApexPageMessages() method to clear the messages on a Visualforce page while executing Apex test methods.



            Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.



            Why: You can use the System.Test.clearApexPageMessages() method to test the success or failure of each call to controller methods. Using this function along with the ApexPages.hasMessages() and ApexPages.getMessages() methods allows you to test Visualforce controllers more easily.




            This method is also included in the documentation on the Test Class:




            clearApexPageMessages()

            Clear the messages on a Visualforce page while executing Apex test methods.



            Signature

            public static void clearApexPageMessages()



            Return Value

            Type: void



            Usage

            This method may only be used in tests.



            Example



            @isTest
            static void clearMessagesTest()
            Test.setCurrentPage(new PageReference('/'));
            ApexPages.addMessage(
            new ApexPages.Message(ApexPages.Severity.WARNING, 'Sample Warning')
            );
            System.assertEquals(1, ApexPages.getMessages().size());
            Test.clearApexPageMessages();
            System.assertEquals(0, ApexPages.getMessages().size());







            share|improve this answer























            • Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

              – Keith C
              1 hour ago
















            5














            It was easy enough to find the Release Note for this feature by looking at Development > Apex.




            Clear Messages on Visualforce Pages While Testing



            Use the new System.Test.clearApexPageMessages() method to clear the messages on a Visualforce page while executing Apex test methods.



            Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.



            Why: You can use the System.Test.clearApexPageMessages() method to test the success or failure of each call to controller methods. Using this function along with the ApexPages.hasMessages() and ApexPages.getMessages() methods allows you to test Visualforce controllers more easily.




            This method is also included in the documentation on the Test Class:




            clearApexPageMessages()

            Clear the messages on a Visualforce page while executing Apex test methods.



            Signature

            public static void clearApexPageMessages()



            Return Value

            Type: void



            Usage

            This method may only be used in tests.



            Example



            @isTest
            static void clearMessagesTest()
            Test.setCurrentPage(new PageReference('/'));
            ApexPages.addMessage(
            new ApexPages.Message(ApexPages.Severity.WARNING, 'Sample Warning')
            );
            System.assertEquals(1, ApexPages.getMessages().size());
            Test.clearApexPageMessages();
            System.assertEquals(0, ApexPages.getMessages().size());







            share|improve this answer























            • Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

              – Keith C
              1 hour ago














            5












            5








            5







            It was easy enough to find the Release Note for this feature by looking at Development > Apex.




            Clear Messages on Visualforce Pages While Testing



            Use the new System.Test.clearApexPageMessages() method to clear the messages on a Visualforce page while executing Apex test methods.



            Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.



            Why: You can use the System.Test.clearApexPageMessages() method to test the success or failure of each call to controller methods. Using this function along with the ApexPages.hasMessages() and ApexPages.getMessages() methods allows you to test Visualforce controllers more easily.




            This method is also included in the documentation on the Test Class:




            clearApexPageMessages()

            Clear the messages on a Visualforce page while executing Apex test methods.



            Signature

            public static void clearApexPageMessages()



            Return Value

            Type: void



            Usage

            This method may only be used in tests.



            Example



            @isTest
            static void clearMessagesTest()
            Test.setCurrentPage(new PageReference('/'));
            ApexPages.addMessage(
            new ApexPages.Message(ApexPages.Severity.WARNING, 'Sample Warning')
            );
            System.assertEquals(1, ApexPages.getMessages().size());
            Test.clearApexPageMessages();
            System.assertEquals(0, ApexPages.getMessages().size());







            share|improve this answer













            It was easy enough to find the Release Note for this feature by looking at Development > Apex.




            Clear Messages on Visualforce Pages While Testing



            Use the new System.Test.clearApexPageMessages() method to clear the messages on a Visualforce page while executing Apex test methods.



            Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.



            Why: You can use the System.Test.clearApexPageMessages() method to test the success or failure of each call to controller methods. Using this function along with the ApexPages.hasMessages() and ApexPages.getMessages() methods allows you to test Visualforce controllers more easily.




            This method is also included in the documentation on the Test Class:




            clearApexPageMessages()

            Clear the messages on a Visualforce page while executing Apex test methods.



            Signature

            public static void clearApexPageMessages()



            Return Value

            Type: void



            Usage

            This method may only be used in tests.



            Example



            @isTest
            static void clearMessagesTest()
            Test.setCurrentPage(new PageReference('/'));
            ApexPages.addMessage(
            new ApexPages.Message(ApexPages.Severity.WARNING, 'Sample Warning')
            );
            System.assertEquals(1, ApexPages.getMessages().size());
            Test.clearApexPageMessages();
            System.assertEquals(0, ApexPages.getMessages().size());








            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 1 hour ago









            Adrian LarsonAdrian Larson

            110k19120256




            110k19120256












            • Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

              – Keith C
              1 hour ago


















            • Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

              – Keith C
              1 hour ago

















            Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

            – Keith C
            1 hour ago






            Would be easier still if a link was put back in the idea once the feature was documented in the normal product help. Would have saved 15 wasted minutes of my life and 5 of yours.

            – Keith C
            1 hour ago














            4














            OK, with a different set of keywords I hit this Clear Messages on Visualforce Pages While Testing release note that talks about the Test.clearApexPageMessages() method. That is explained in the Test Class documentation.



            And happy days, both these assertions pass:



             System.assert(ApexPages.getMessages().size() > 0);
            Test.clearApexPageMessages();
            System.assert(ApexPages.getMessages().size() == 0);





            share|improve this answer



























              4














              OK, with a different set of keywords I hit this Clear Messages on Visualforce Pages While Testing release note that talks about the Test.clearApexPageMessages() method. That is explained in the Test Class documentation.



              And happy days, both these assertions pass:



               System.assert(ApexPages.getMessages().size() > 0);
              Test.clearApexPageMessages();
              System.assert(ApexPages.getMessages().size() == 0);





              share|improve this answer

























                4












                4








                4







                OK, with a different set of keywords I hit this Clear Messages on Visualforce Pages While Testing release note that talks about the Test.clearApexPageMessages() method. That is explained in the Test Class documentation.



                And happy days, both these assertions pass:



                 System.assert(ApexPages.getMessages().size() > 0);
                Test.clearApexPageMessages();
                System.assert(ApexPages.getMessages().size() == 0);





                share|improve this answer













                OK, with a different set of keywords I hit this Clear Messages on Visualforce Pages While Testing release note that talks about the Test.clearApexPageMessages() method. That is explained in the Test Class documentation.



                And happy days, both these assertions pass:



                 System.assert(ApexPages.getMessages().size() > 0);
                Test.clearApexPageMessages();
                System.assert(ApexPages.getMessages().size() == 0);






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 1 hour ago









                Keith CKeith C

                96.8k1097216




                96.8k1097216



























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