Return message body when stream buffer is empty (#5)

Author: cdosoftei

composer.json

@@ -1,7 +1,7 @@
 {
   "name": "rtckit/sip",
   "description": "Parser/Renderer for SIP protocol written in PHP",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "type": "library",
   "keywords": [
     "sip",

src/StreamParser.php

@@ -79,6 +79,7 @@ public function process(string $chunk, ?array &$messages): int
                     $this->buffer = ltrim(substr($this->buffer, $this->message->contentLength->value));
                 } else {
                     /* We're all set! */
+                    $this->message->body = $this->buffer;
                     $this->buffer = '';
                 }
             } else {

tests/StreamParserTest.php

@@ -60,6 +60,19 @@ public function testShouldParseVariousChunkSizes()
         fclose($fp);
     }
 
+    public function testShouldParseStreamedMessagesNoDifferentThanPDU()
+    {
+        $bytes = file_get_contents(__DIR__ . '/fixtures/rfc4475/wsinv.dat');
+
+        if ($this->parser->process($bytes, $messages) === StreamParser::SUCCESS) {
+            /* Expect one message and one message only */
+            $this->assertEquals(1, count($messages));
+
+            /* The streamed message to be parsed as if it was an individual PDU */
+            $this->assertEquals(Message::parse($bytes), $messages[0]);
+        }
+    }
+
     public function testFailureWithoutContentLength()
     {
         $bytes =