Added unit tests for helpers and tests for commands

tests/Feature/Commands/SetSlackWebhookCommandTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Tests\Feature\Commands;
+
+use App\Helpers\SettingsHelper;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Tests\TestCase;
+
+class SetSlackWebhookCommandTest extends TestCase
+{
+    use RefreshDatabase;
+
+    /**
+     * A basic feature test example.
+     *
+     * @return void
+     */
+    public function testSetSlackWebhook()
+    {
+        SettingsHelper::set('slack_webhook', 'pre-test');
+
+        $this->artisan('speedtest:slack', [ 'webhook' => 'test' ])
+             ->expectsOutput('Slack webhook updated')
+             ->assertExitCode(0);
+
+        $this->assertEquals(SettingsHelper::get('slack_webhook')->value, 'test');
+    }
+}