public function testInitPolynom()
 {
     $polynom = new ezcGraphPolynom();
     $polynom->init(4);
     $this->assertEquals(array(0 => 0, 1 => 0, 2 => 0, 3 => 0, 4 => 0), $this->readAttribute($polynom, 'values'), 'Values array not properly initialized.');
 }