Add more middleware tests

tests/Unit/Http/Middleware/LanguageMiddlewareTest.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Tests\Unit\Http\Middleware;
+
+use Mockery as m;
+use Illuminate\Foundation\Application;
+use Illuminate\Contracts\Config\Repository;
+use Pterodactyl\Http\Middleware\LanguageMiddleware;
+
+class LanguageMiddlewareTest extends MiddlewareTestCase
+{
+    /**
+     * @var \Illuminate\Foundation\Application|\Mockery\Mock
+     */
+    private $appMock;
+
+    /**
+     * @var \Illuminate\Contracts\Config\Repository|\Mockery\Mock
+     */
+    private $config;
+
+    /**
+     * Setup tests.
+     */
+    public function setUp()
+    {
+        parent::setUp();
+
+        $this->appMock = m::mock(Application::class);
+        $this->config = m::mock(Repository::class);
+    }
+
+    /**
+     * Test that a language is defined via the middleware.
+     */
+    public function testLanguageIsSet()
+    {
+        $this->config->shouldReceive('get')->with('app.locale', 'en')->once()->andReturn('en');
+        $this->appMock->shouldReceive('setLocale')->with('en')->once()->andReturnNull();
+
+        $this->getMiddleware()->handle($this->request, $this->getClosureAssertions());
+    }
+
+    /**
+     * Return an instance of the middleware using mocked dependencies.
+     *
+     * @return \Pterodactyl\Http\Middleware\LanguageMiddleware
+     */
+    private function getMiddleware(): LanguageMiddleware
+    {
+        return new LanguageMiddleware($this->appMock, $this->config);
+    }
+}