Add console extender (#2057)

* Made the console command system extender-friendly

* Added console extender

* Added ConsoleTestCase to integration tests

* Added integration tests for console extender

* Marked event-based console extension system as deprecated

* Moved trimming command output of whitespace into superclass

* Renamed 'add' to 'command'

* Added special processing for laravel commands

* Code style fixes

* More style fixes

* Fixed $this->container

php-packages/testing/tests/integration/ConsoleTestCase.php

@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Tests\integration;
+
+use Flarum\Foundation\Application;
+use Symfony\Component\Console\Application as ConsoleApplication;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\BufferedOutput;
+
+abstract class ConsoleTestCase extends TestCase
+{
+    protected $console;
+
+    protected function console()
+    {
+        if (is_null($this->console)) {
+            $this->console = new ConsoleApplication('Flarum', Application::VERSION);
+            $this->console->setAutoExit(false);
+
+            foreach ($this->app()->getConsoleCommands() as $command) {
+                $this->console->add($command);
+            }
+        }
+
+        return $this->console;
+    }
+
+    protected function runCommand(array $inputArray)
+    {
+        $input = new ArrayInput($inputArray);
+        $output = new BufferedOutput();
+
+        $this->console()->run($input, $output);
+
+        return trim($output->fetch());
+    }
+}