Medžaiaga skaidrėms: Išlipus iš 1 PHP failo

1-failas.php

<?php
$today = date('Y-m-d');
if (date('z') == 0xFF) {
    echo "Programuotojų diena";
} else if ('2015-10-10' <= $today && $today <= '2015-10-10') {
    echo "Programuotojų savaitė";
} else {
    echo "Paprasta diena";
}

Events.php

<?php

class Events
{
    public function isProgrammersDay($today)
    {
        return date('z', strtotime($today)) == 0xFF;
    }

    public function isCodeWeek($today)
    {
        $date = date('Y-m-d', strtotime($today));

        return '2015-10-10' <= $date && $date <= '2015-10-18';
    }
}

EventsTest.php

<?php

class EventsTest extends PHPUnit_Framework_TestCase {
    public function testCodeWeek2015()
    {
        $service = new Events();
        $this->assertTrue($service->isCodeWeek('2015-10-10'));
        $this->assertTrue($service->isCodeWeek('2015-10-15'));
        $this->assertTrue($service->isCodeWeek('2015-10-18'));
        $this->assertFalse($service->isCodeWeek('2015-10-09'));
        $this->assertFalse($service->isCodeWeek('2015-10-19'));
        $this->assertFalse($service->isCodeWeek('2015-01-01'));
    }

    public function testCodeWeek2014()
    {
        $service = new Events();
        $this->assertTrue($service->isCodeWeek('2014-10-10'));
        $this->assertTrue($service->isCodeWeek('2014-10-15'));
        $this->assertTrue($service->isCodeWeek('2014-10-18'));
        $this->assertFalse($service->isCodeWeek('2014-10-09'));
        $this->assertFalse($service->isCodeWeek('2014-10-19'));
        $this->assertFalse($service->isCodeWeek('2014-01-01'));
    }

    public function testProgrammersDay()
    {
        $service = new Events();
        $this->assertTrue($service->isProgrammersDay('2015-09-13'));
        $this->assertFalse($service->isProgrammersDay('2015-10-15'));
        $this->assertTrue($service->isProgrammersDay('2014-09-13'));
        $this->assertFalse($service->isProgrammersDay('2014-09-14'));
    }
}