paragraph1\phpFCM\Tests\MessageTest::testJsonEncodeHandlesTTL PHP Method

    public function testJsonEncodeHandlesTTL()
    {
        $body = '{"to":"\\/topics\\/testing","data":{"foo":"bar"},"priority":"high","time_to_live":3}';
        $this->fixture->setData(['foo' => 'bar'])->setTimeToLive(3);
        $this->fixture->addRecipient(new Topic('testing'));
        $this->assertSame($body, json_encode($this->fixture));
    }