Add an example test

tests/ExampleTest.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+class ExampleTest extends TestCase
+{
+    public function testSomething()
+    {
+        $this->assertTrue(true);
+    }
+}