Add test for configurable hooks server port

.travis.yml

@@ -1,5 +1,4 @@
 sudo: required
-dist: trusty
 language: php
 before_install:
   - npm install -g dredd

bin/dredd-hooks-php

@@ -25,10 +25,10 @@ if (!$loaded) {
 
 // Get options from the command line
 $options = getopt('', [
-    'host:',
-    'port:',
-    'force',
-]);
+     'host:',
+     'port:',
+     'force',
+ ]);
 
 Hooks::loadHooks($argv);
 

features/configurable_port.feature

@@ -0,0 +1,49 @@
+Feature: Configurable port
+
+  Background:
+    Given I have "dredd-hooks-php" command installed
+    And I have "dredd" command installed
+    And a file named "server.rb" with:
+      """
+      require 'sinatra'
+      get '/message' do
+        "Hello World!\n\n"
+      end
+      """
+
+    And a file named "apiary.apib" with:
+      """
+      # My Api
+      ## GET /message
+      + Response 200 (text/html;charset=utf-8)
+          Hello World!
+      """
+
+  @announce
+  Scenario:
+    Given a file named "hooks/execution_order_hookfile.php" with:
+      """
+      <?php
+
+      use Dredd\Hooks;
+
+      $key = "hooks_modifications";
+
+      Hooks::before('/message > GET', function(&$transaction) use ($key) {
+
+          if ( ! property_exists($transaction, $key)) $transaction->{$key} = [];
+
+          $transaction->{$key}[] = "listening on different port";
+      });
+      """
+
+    Given I set the environment variables to:
+      | variable                       | value      |
+      | TEST_DREDD_HOOKS_HANDLER_ORDER | true       |
+
+    When I run `dredd ./apiary.apib http://localhost:4567 --hooks-worker-handler-port 61325 --server "ruby server.rb" --language dredd-hooks-php --hookfiles hooks/execution_order_hookfile.php`
+    Then the exit status should be 0
+    Then the output should contain:
+      """
+      0 listening on different port
+      """