simple-unit-test

php-unit-checkout.php

<?php

namespace DataProvider\Example\Test;

use DataProvider\Example\Checkout;
use PHPUnit_Framework_TestCase;

/**
 * Checkout test for Cash and Credit card.
 */
class CheckoutTest extends PHPUnit_Framework_TestCase
{
    /**
     * @var Checkout
     */
    protected $checkout;

    public function setup()
    {
        $this->checkout = new Checkout();
    }

    /**
     * Data provider for testCalculateTotal
     * variables are in the order of
     * $paymentMethod, $expectedTotal.
     * 
     * @return type
     */
    public function paymentMethodProvider()
    {
        return [
            ['Cash', 100.00],
            ['Credit Card', 95.00],
        ];
    }

    /**
     * Test to check if the order total is calculated correctly
     * for given payment method.
     * 
     * @param string $paymentMethod
     * @param float  $expectedTotal
     * 
     * @dataProvider paymentMethodProvider
     */
    public function testCalculateTotal($paymentMethod, $expectedTotal)
    {
        $this->checkout->calculateTotal($paymentMethod);
        $this->assertEquals(
            $this->checkout->getTotal(),
            $expectedTotal,
            sprintf('Testing total calculation for %s.', $paymentMethod)
        );
    }
}