/**
  * @param callable $callback
  */
 public function listenEvents(callable $callback)
 {
     $stream = $this->getHttpClient()->get('/events');
     while (!$stream->getBody()->eof()) {
         $line = \GuzzleHttp\Stream\read_line($stream->getBody());
         if (null !== ($raw = json_decode($line, true))) {
             call_user_func($callback, new Event($raw));
         }
     }
 }
 public function testSkipsOverwrittenBytes()
 {
     $decorated = Stream::factory(implode("\n", array_map(function ($n) {
         return str_pad($n, 4, '0', STR_PAD_LEFT);
     }, range(0, 25))), true);
     $body = new CachingStream($decorated);
     $this->assertEquals("0000\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0001\n", \GuzzleHttp\Stream\read_line($body));
     // Write over part of the body yet to be read, so skip some bytes
     $this->assertEquals(5, $body->write("TEST\n"));
     $this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
     // Read, which skips bytes, then reads
     $this->assertEquals("0003\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
     $this->assertEquals("0004\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0005\n", \GuzzleHttp\Stream\read_line($body));
     // Overwrite part of the cached body (so don't skip any bytes)
     $body->seek(5);
     $this->assertEquals(5, $body->write("ABCD\n"));
     $this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
     $this->assertEquals("TEST\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0003\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0004\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0005\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals("0006\n", \GuzzleHttp\Stream\read_line($body));
     $this->assertEquals(5, $body->write("1234\n"));
     $this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
     // Seek to 0 and ensure the overwritten bit is replaced
     $body->seek(0);
     $this->assertEquals("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", $body->read(50));
     // Ensure that casting it to a string does not include the bit that was overwritten
     $this->assertContains("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", (string) $body);
 }