Mocking connection DB

gistfile1.txt

public function setUp() : void
    {
        $this->afterApplicationCreated(function () {
            $this->db = m::mock(
                Connection::class . '[select,update,insert,delete]',
                [m::mock(PDO::class)]
            );
            $manager = $this->app['db'];
            $manager->setDefaultConnection('mock');
            $r = new \ReflectionClass($manager);
            $p = $r->getProperty('connections');
            $p->setAccessible(true);
            $list = $p->getValue($manager);
            $list['mock'] = $this->db;

            $p->setValue($manager, $list);
        });

        parent::setUp();
    }