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

    public function testErrorWhenStreamResourceIsInvalid()
    {
        $stream = fopen('php://temp', 'r+');
        $loop = $this->createWriteableLoopMock();
        $error = null;
        $buffer = new Buffer($stream, $loop);
        $buffer->on('error', function ($message) use(&$error) {
            $error = $message;
        });
        // invalidate stream resource
        fclose($stream);
        $buffer->write('Attempting to write to bad stream');
        $this->assertInstanceOf('Exception', $error);
        // the error messages differ between PHP versions, let's just check substrings
        $this->assertContains('Unable to write to stream: ', $error->getMessage());
        $this->assertContains(' not a valid stream resource', $error->getMessage(), '', true);
    }