<?php
require_once 'Cart.php';

class Checkout {
    private $cart;

    public function __construct(Cart $cart) {
        $this->cart = $cart;
    }

    public function getSubTotal() {
        return $this->cart->getTotal();
    }

    public function getShippingCharge() {
        if ($this->cart->getTotal() > 1500) {
            return 0;
        } else {
            return 315;
        }
    }

    public function getTotal() {
        return $this->cart->getTotal() + $this->getShippingCharge();
    }

    public function getCart() {
        return $this->cart;
    }
}

<?php
// Call CheckoutTest::main() if this source file is executed directly.
if (!defined('PHPUnit_MAIN_METHOD')) {
    define('PHPUnit_MAIN_METHOD', 'CheckoutTest::main');
}

require_once 'PHPUnit/Framework.php';

require_once 'Checkout.php';

/**
 * Test class for Checkout.
 * Generated by PHPUnit on 2007-08-23 at 15:27:59.
 */
class CheckoutTest extends PHPUnit_Framework_TestCase {
    /**
     * Runs the test methods of this class.
     *
     * @access public
     * @static
     */
    public static function main() {
        require_once 'PHPUnit/TextUI/TestRunner.php';

        $suite  = new PHPUnit_Framework_TestSuite('CheckoutTest');
        $result = PHPUnit_TextUI_TestRunner::run($suite);
    }

    /**
     * Sets up the fixture, for example, opens a network connection.
     * This method is called before a test is executed.
     *
     * @access protected
     */
    protected function setUp() {
    }

    /**
     * Tears down the fixture, for example, closes a network connection.
     * This method is called after a test is executed.
     *
     * @access protected
     */
    protected function tearDown() {
    }

    /**
     * @todo Implement testGetSubTotal().
     */
    public function testGetSubTotal() {
        // Remove the following lines when you implement this test.
        $this->markTestIncomplete(
          'This test has not been implemented yet.'
        );
    }

    /**
     * @todo Implement testGetShippingCharge().
     */
    public function testGetShippingCharge() {
        // Remove the following lines when you implement this test.
        $this->markTestIncomplete(
          'This test has not been implemented yet.'
        );
    }

    /**
     * @todo Implement testGetTotal().
     */
    public function testGetTotal() {
        // Remove the following lines when you implement this test.
        $this->markTestIncomplete(
          'This test has not been implemented yet.'
        );
    }

    /**
     * @todo Implement testGetCart().
     */
    public function testGetCart() {
        // Remove the following lines when you implement this test.
        $this->markTestIncomplete(
          'This test has not been implemented yet.'
        );
    }
}

// Call CheckoutTest::main() if this source file is executed directly.
if (PHPUnit_MAIN_METHOD == 'CheckoutTest::main') {
    CheckoutTest::main();
}
?>