public function test_iconvertdel()
 {
     $t = new CT1_Interest_Format();
     $t->set_m(367);
     // anything greater than 366 is treated as continuous
     $t->set_advance(true);
     $this->assertTrue(abs($this->icalc->get_rate_in_form($t) - 0.058269) < 1.0E-6);
     // source of numbers: Formulae and tables 6% p.58   delta
 }