Hi All,

I have written a validation trigger to make sure that only one record of a custom object has a particular flag turned on for each account.

When I test this trigger directly by trying to create a record that satisfies the trigger condition, I get the error message as expected.

So I went ahead and wrote a test class. I am new to apex and this was my first attempt at writing a test method. I read the docmentation and some examples. When I run my test, its 75% complete which is good to move to production but 2 of the most crucial lines are not being tested. I want to understand why this is happening and how  can address it.

When I look at the log, the SOQL query whic is a the heart of my trigger's error mechanism does not return any rows. I confirmed that this query with the values given in the test class does return a row and therefore the error must be raised. but for some reason this is not happening.

Please help meunderstand what is wrong here. Thanks.

Trigger code:

trigger osv_check_default_flag on Collection_Rule__c (before insert, before update) 
{
	//Declarations		
	ID accountID;
	//List of Collection rule objects from the same account
	List <Collection_Rule__c> rules;
	
	for (Collection_Rule__c newRule : Trigger.new) 
	{
		//Get Account of record being inserted
		accountID = newRule.Account__c;
		//Get collection rules from the same Account where the "default" flag is checked.
		rules=[select id from Collection_Rule__c where Default__c=true and Account__c=:accountID];
				
		//If records with the default exist and the current record has its default flag checked, Do not save and raise ERROR!
		if(rules.size()>0 && newRule.Default__c == true)
		{
			newRule.addError('An Account can only have ONE Default Collection Rule');
			break;
		}	 
	  
	 }
	
	

}

 test class:

@isTest
private class osv_test_collection_rule_trigger {
	//Test Method
	static testMethod void CollectionRulesDefault_Test() 
	{
		//Prepare Data
		Collection_Rule__c cr = new Collection_Rule__c();
		cr.Name = 'Test Collection Rule';		
		//This is an ID and will need to be changed when moving to production.
		cr.Account__c = '001Z0000004pGIIIA2';
		cr.Default__c = true;
	
		
		//START TEST
    	//test.starttest();
    	
    	/*Try-catch is the better way to test AddError() method
    	//http://boards.developerforce.com/t5/Apex-Code-Development/How-do-I-test-for-an-exception-addError-in-a-Trigger/td-p/145443*/
    	
    	try {    	
    	//Insert record
    		insert cr;   		
    		
    	}
    	catch(Exception e){
    		Boolean expectedExceptionThrown =  e.getMessage().Equals('An Account can only have ONE Default Collection Rule')? true : false;
            System.AssertEquals(expectedExceptionThrown, true);
            } 
    	
    	//test.stoptest();
	}
}