package org.apidesign.apifest08.test;

import junit.framework.TestCase;

import org.apidesign.apifest08.currency.Convertor;

import org.apidesign.apifest08.currency.CurrencyValue;

/** Finish the Convertor API, and then write bodies of methods inside

 * of this class to match the given tasks. To fullfil your task, use the

 * API define in the <code>org.apidesign.apifest08.currency</code> package.

 * Do not you reflection, or other hacks as your code

 * shall run without any runtime permissions.

 */

public class Task1Test extends TestCase {

    public Task1Test(String testName) {

        super(testName);

    }

    @Override

    protected void setUp() throws Exception {

    }

    @Override

    protected void tearDown() throws Exception {

    }

    /** Create convertor that understands two currencies, CZK and

     *  USD. Make 1 USD == 17 CZK.

     *

     * Creation of the convertor shall not require subclassing of any class

     * or interface on the client side.

     *

     * @return prepared convertor ready for converting USD to CZK and CZK to USD

     */

    public static Convertor<Integer, String> createCZKtoUSD() {

        return Convertor.getConvertorIntegerString(

                CurrencyValue.getCurrencyValue(1, "USD"),

                CurrencyValue.getCurrencyValue(17, "CZK")

        );

    }

    /** Create convertor that understands two currencies, CZK and

     *  SKK. Make 100 SKK == 80 CZK.

     *

     * Creation of the convertor shall not require subclassing of any class

     * or interface on the client side.

     * 

     * @return prepared convertor ready for converting SKK to CZK and CZK to SKK

     */

    public static Convertor<Integer, String> createSKKtoCZK() {

        return Convertor.getConvertorIntegerString(

                CurrencyValue.getCurrencyValue(100, "SKK"),

                CurrencyValue.getCurrencyValue(80, "CZK")

        );

    }

    /** Use the convertor from <code>createCZKtoUSD</code> method and do few conversions

     * with it.

     */

    public void testCurrencyCZKUSD() throws Exception {

        Convertor<Integer, String> c = createCZKtoUSD();

        CurrencyValue<Integer, String> result;

        // convert $5 to CZK using c:

        // assertEquals("Result is 85 CZK");

        result = c.convert(CurrencyValue.getCurrencyValue(5, "USD"));

        assertEquals(CurrencyValue.getCurrencyValue(85, "CZK"), result);

        // convert $8 to CZK

        // assertEquals("Result is 136 CZK");

        result = c.convert(CurrencyValue.getCurrencyValue(8, "USD"));

        assertEquals(CurrencyValue.getCurrencyValue(136, "CZK"), result);

        // convert 1003CZK to USD

        // assertEquals("Result is 59 USD");

        result = c.convert(CurrencyValue.getCurrencyValue(1003, "CZK"));

        assertEquals(CurrencyValue.getCurrencyValue(59, "USD"), result);

    }

    /** Use the convertor from <code>createSKKtoCZK</code> method and do few conversions

     * with it.

     */

    public void testCurrencySKKCZK() throws Exception {

        Convertor<Integer, String> c = createSKKtoCZK();

        CurrencyValue<Integer, String> result;

        // convert 16CZK using c:

        // assertEquals("Result is 20 SKK");

        result = c.convert(CurrencyValue.getCurrencyValue(16, "CZK"));

        assertEquals(CurrencyValue.getCurrencyValue(20, "SKK"), result);

        // convert 500SKK to CZK

        // assertEquals("Result is 400 CZK");

        result = c.convert(CurrencyValue.getCurrencyValue(500, "SKK"));

        assertEquals(CurrencyValue.getCurrencyValue(400, "CZK"), result);

    }

}