[PHP] Writing Unit Tests with PHPUnit, Part 1: The Set Up

00-acme-cache.php

<?php

class AcmeCache
{
    private $duration;

    public function __construct()
    {
        $this->duration = 43200;
    }

    public function setDuration($duration)
    {
        $this->duration = $duration;
    }

    public function getDuration()
    {
        return $this->duration;
    }

    // More cache code omitted...
}

01-acme-cache-test.php

<?php

use PHPUnit\Framework\TestCase;

class AcmeCacheTest extends TestCase
{
  protected $cache;

  protected function setUp()
  {
    $this->cache = new AcmeCache();
  }

  public function testDefaultDuration()
  {
    $this->assertTrue($this->cache->getDuration() === 43200);
  }
  
  public function testNewDuration()
  {
    $this->cache->setDuration(1000);
    
    $this->assertFalse($this->cache->getDuration() === 43200);
    $this->assertTrue($this->cache->getDuration() === 1000);
  }
  
  // More to come...
}