Comos\Qpm\Process\ProcessTest::testSendSignal_Failed PHP Method

    public function testSendSignal_Failed()
    {
        $child = Process::fork(function () {
            \usleep(0.1 * 1000 * 1000);
        });
        $errorSignal = 1001;
        try {
            $child->sendSignal($errorSignal);
        } catch (\Exception $ex) {
            $this->assertTrue($ex instanceof FailToSendSignalException);
        }
        \pcntl_wait($st);
    }