Added unit tests

tests/Feature/AppVersionTest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class AppVersionTest extends TestCase
+{
+    /**
+     * Test the version CLI command
+     *
+     * @return void
+     */
+    public function testVersionCommand()
+    {
+        $response = $this->artisan('speedtest:version')
+                         ->expectsOutput('Speedtest Tracker v' . config('speedtest.version'));
+    }
+}