VendingMachineTest.php

<?php
/**
 * @author Manuele Menozzi <[email protected]>
 */

include 'VendingMachine.php';

class VendingMachineTest extends PHPUnit_Framework_TestCase
{
    /**
     * @var VendingMachine
     */
    private $vendingMachine;

    public function setUp()
    {
        $this->vendingMachine = new VendingMachine();
    }

    public function testInsertCoin()
    {
        $this->vendingMachine->addCoin(0.1);
        $this->vendingMachine->addCoin(0.5);
        $this->vendingMachine->addCoin(0.05);

        $this->assertEquals(0.65, $this->vendingMachine->getCurrentCredit());

        $this->vendingMachine->addCoin(1);

        $this->assertEquals(1.65, $this->vendingMachine->getCurrentCredit());
    }

    public function testSellItemAndReturn()
    {
        $this->vendingMachine->addCoin(0.1);
        $this->vendingMachine->addCoin(0.5);
        $this->vendingMachine->addCoin(0.05);
        $this->vendingMachine->addCoin(1);

        $this->vendingMachine->sellItem('coffe');

        // Ipotizziamo che il caffè costi 0,38 €
        $this->assertEquals(1.27, $this->vendingMachine->getCurrentCredit());

        $return = $this->vendingMachine->returnCredit();

        $this->assertEquals(1.27, $return);
        $this->assertEquals(0, $this->vendingMachine->getCurrentCredit());
    }

    public function testMachineDoesNotAcceptInvalidCoin()
    {
        $this->vendingMachine->addCoin(0.01);
        $this->assertEquals(0, $this->vendingMachine->getCurrentCredit());
    }

}