Added an end to end test for grpc extension.

Author: Takashi Matsuo

e2e/EndToEndTest.php

@@ -146,4 +146,11 @@ public function testSession()
                             'session.php status code');
         $this->assertEquals('1', $body = $resp->getBody()->getContents());
     }
+
+    public function testGrpcPubsub()
+    {
+        $resp = $this->client->get('grpc_pubsub.php');
+        $this->assertEquals('200', $resp->getStatusCode(),
+                            'grpc_pubsub.php status code');
+    }
 }

testapps/php56_custom/composer.json

@@ -1,6 +1,6 @@
 {
     "require": {
-        "silex/silex": "^1.3",
-        "php": "^5.6"
+        "php": "^5.6",
+        "silex/silex": "^1.3"
     }
 }

testapps/php56_e2e/composer.json

@@ -1,6 +1,11 @@
 {
     "require": {
-        "silex/silex": "^1.3",
-        "php": "^5.6"
+        "php": "^5.6",
+        "google/auth": "dev-master",
+        "grpc/grpc": "dev-release-0_13",
+        "silex/silex": "^1.3"
+    },
+    "autoload": {
+        "classmap": ["web"]
     }
 }

testapps/php56_e2e/web/annotations.php

@@ -0,0 +1,17 @@
+<?php
+// DO NOT EDIT! Generated by Protobuf-PHP protoc plugin 1.0
+// Source: google/api/annotations.proto
+//   Date: 2016-03-02 22:35:01
+
+namespace {
+  \google\protobuf\MethodOptions::extension(function(){
+      // OPTIONAL MESSAGE google\api\http = 72295728
+    $f = new \DrSlump\Protobuf\Field();
+    $f->number    = 72295728;
+    $f->name      = "google\api\http";
+    $f->type      = \DrSlump\Protobuf::TYPE_MESSAGE;
+    $f->rule      = \DrSlump\Protobuf::RULE_OPTIONAL;
+    $f->reference = '\google\api\HttpRule';
+    return $f;
+  });
+}