anchor.diff:  
   	public void function testRename() skip="isNotSupported" {
   		if(isNotSupported()) return;
  +
  +		try {
  +			if ( structKeyExists(db, "test2") )
  +				db["test2"].drop(); // avoid collection exists error if test fails
  +		} catch (e) {};
   		var coll = resetTestCollection();
   		coll.rename("test2");
   		$assert.isEqual(5, db["test2"].count());
   
   		db["test2"].drop();
   	}
  -
  -
   
   	private void function testCacheAsScope() skip="isNotSupported" {
   		local.id=createUniqueId();
  
positive.code: 		$assert.isEqual( 0, coll.count() );
  	}
  
  	public void function testAggregateResults() skip="isNotSupported" {
  		if(isNotSupported()) return;
  		var coll = resetTestCollection();
  
  
negative.code: 
  		coll.drop();
  		coll.insert(docs);
  		return coll;
  	}
  
  