View file File name : ExampleTest.php Content :<?php namespace Tests\Feature; // use Illuminate\Foundation\Testing\RefreshDatabase; use Tests\TestCase; class ExampleTest extends TestCase { /** * A basic test example. * * @return void */ public function test_the_application_returns_a_successful_response() { $this->assertTrue(true); } /* * i want function that ( LOGIC HERE ) * Please write your code as i show in example below * i only need php code that's ready to be used */ public function testOrderFunction() { $function = function($input){ //write code here }; $input='';/*write expected Input here */; $result='';/*write expected result here */; $this->assertEquals($function($input),$result); } }