React\Tests\Stream\BufferTest::testDrain PHP Метод

    public function testDrain()
    {
        $stream = fopen('php://temp', 'r+');
        $loop = $this->createWriteableLoopMock();
        $loop->preventWrites = true;
        $buffer = new Buffer($stream, $loop);
        $buffer->softLimit = 4;
        $buffer->on('error', $this->expectCallableNever());
        $buffer->on('drain', $this->expectCallableOnce());
        $buffer->write("foo");
        $loop->preventWrites = false;
        $buffer->listening = false;
        $buffer->write("bar\n");
    }