public function testGetChannelname()
 {
     $g1 = InstructionControl::getChannelSetId(genSaneGuid());
     $n = genSaneGuid();
     $chanId = InstructionControl::getChannelId($g1, $n);
     $this->assertEquals($n, InstructionControl::getChannelname($chanId));
     $this->assertEquals(null, InstructionControl::getChannelname(-100));
 }