I can't understand why this assertment is true in my DEV450 environment :

    // TODO #1: Review the code below to see how we are using  
    //          the assertEquals method of the System class to  
    //          ensure that there are no Contacts in the db.
    // System.debug('Size  : ' + [SELECT LastName FROM Contact].size());
    System.assertEquals(0, [SELECT LastName FROM Contact].size());

It seems to be true because the assertion pass, But I got contacts in my training environment !

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If this code is in a test class than it makes sense. At least as long as you do not use the annotation:


In the test classes without this annotation you are just able to access/query the data that you create in your specific test method. The default value for this annotation is false.

  • I knew I was missing something enormous !! Thanks – Alexis MASSON Jun 29 '18 at 9:14
  • 1
    Setting the SeeAllData to true is supposed to be an exception for specific test cases (i.e. getting the standard pricebook before the Test.getStandardPricebookId was available). – Answers_Seeker Jun 29 '18 at 11:03

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