public function testToArrayFromArray()
 {
     $select = new Kwf_Model_Select();
     $select->where(new Kwf_Model_Select_Expr_Or(array(new Kwf_Model_Select_Expr_Equals('foo', 'bar'), new Kwf_Model_Select_Expr_Not(new Kwf_Model_Select_Expr_Equals('baz', 'buz')))));
     $select->whereEquals('blub', 123);
     $ar = $select->toArray();
     $this->assertEquals(is_array($ar), true);
     $select2 = Kwf_Model_Select::fromArray($ar);
     $this->assertEquals($select, $select2);
 }