PHP Unit testing is based on the works of Sebastian Bergmann.
Documentation of what can be tested you can find here.
You can place your test in the folder 'tests'.
The structure of a test is a follows:
sample:
<?php
define('INC_ROOT', dirname(__FILE__, 2));
require INC_ROOT . '/vendor/autoload.php';
require INC_ROOT . '/tests/ApiTestCase.php';
class FirstTest extends ApiTestCase
{
public function testJoburg()
{
$this->request('GET', '/server/joburg', [], '/server/index.php');
$this->assertThatResponseHasStatus(200);
$this->assertThatResponseHasContentType('text/html; charset=UTF-8');
$this->assertContains('jojo', $this->response->getBody()->__toString());
}
}
You can run a test by using the command line in the terminal and change the folder to the root of your server. This is the same folder where the 'test' folder is in.
Now enter (sample):
./vendor/bin/phpunit ./test/TestToRun.php
When everything is fine, the output will look like:
PHPUnit 5.4.8 by Sebastian Bergmann and contributors.
. 1 / 1 (100%)
Time: 2.65 seconds, Memory: 6.00MB
OK (1 test, 3 assertions)