We get a ton of spam cases coming into SF so we created a formula field that evaluates to TRUE when the case is 7 days old and the Owner of the case is set to a specific Queue which happens to be the spam queue.

I want to trigger off of this formula field and delete the case. Thus far I have:

TRIGGER_____________________________________________________

trigger DeleteUnknownCaseTrigger on Case (after update, after insert) {


List<Case> lstCaseToDelete = new List<Case>();

for(Case c : trigger.new) {
if(c.QUEUE_UNKNOWN_DELETE__c == TRUE){

Case cDel = new Case(Id=c.Id);
lstCaseToDelete.add(cDel);
}
}

delete lstCaseToDelete;

_____________________________________________________________________________

Test Class

_____________________________________________________________________________

@isTest
private class UnknownCaseTriggerDeleteTestClass {
static testMethod void validateTrigger() {
Date myDate = date.newInstance(2013, 6, 1);

Case c = new Case(
OwnerId = '00G20000000ltb9',
Status = 'New',
Subject = 'Test Case',
Description = 'Case Description'
);

insert c;



c.Estimated_Completion_Date__c = myDate;
}
}

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The problem is that the Trigger is only 66% covered and it complains that code inside the if statement isn't covered. I am new to apex so I thought the by setting the date of Estimated Completion Date it would cause the formula to fire and thus test that loop. What am I doing wrong?