public function testDetachShouldReturnFalseIfSignalHandlerDoesNotExist() { $handle1 = SignalSlot::connect('test', $this, __METHOD__); SignalSlot::clearHandlers('test'); $handle2 = SignalSlot::connect('test', $this, 'handleTestTopic'); $this->assertFalse(SignalSlot::detach($handle1)); }