Code coverage for Classes with only final static string Variables

Question

I have a class which contains only public static final strings how do i write a test class to cover this code?

public class SFA_MobileConstants {

 public static final string ERROR='ERROR';
 public static final string FAIL='FAIL';
 public static final string SUCCESS='SUCCESS';
 public static final string RECSAVEMSG='Record saved';

}


@istest
public class testconstants {

     public testMethod static void testSFA_MobileConstants(){

  System.assertEquals(SFA_MobileConstants.ERROR,SFA_MobileConstants.ERROR);     
  }

}

Answer 1

You should find that if you are testing the code that references these strings they should be covered. Otherwise add a test method to the class that references those strings.

public with sharing class TestStrings {

    public static final String TEST = 'MyString';

    @IsTest
    public static void testStrings()
    {
         System.assertEquals(TEST, TEST);
    }
}

If your variables and tests are in different classes, just be sure to qualify the class name.

public with sharing class TestStrings2 {

    @IsTest
    public static void testStrings()
    {
        System.assertEquals(TestString.TEST, TestString.TEST);
    }
}

In this case you really are just gaining coverage, as we expect the platform behaviour to work and of course provide consistently the strings we assign. So while you could do the same without the assert, it just feels wrong from a best practice point of view. And of course would raise the eye of the security scanner.

Answer 2

Please add a constructor like this:

public SFA_MobileConstants() {}

It will fix your issues.