package org.apidesign.apifest08.test;

import java.math.BigDecimal;

import java.util.Currency;

import junit.framework.TestCase;

import org.apidesign.apifest08.currency.Convertor;

import org.apidesign.apifest08.currency.ConvertorFactory;

/** 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 createCZKtoUSD()

    {

        return (ConvertorFactory.getConvertor("CZK", "USD"));

    }

    /** 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 createSKKtoCZK()

    {

        return (ConvertorFactory.getConvertor(Currency.getInstance("SKK"), Currency.getInstance("CZK")));

    }

    public static Convertor createUSDtoUSD()

    {

        return (ConvertorFactory.getConvertor(Currency.getInstance("USD"), Currency.getInstance("USD")));

    }

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

     * with it.

     */

    public void testCurrencyCZKUSD() throws Exception {

        Convertor  c = createCZKtoUSD();

        BigDecimal result;

        // convert $5 to CZK using c:

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

        result = c.convertFrom(BigDecimal.valueOf(5));

        assertEquals(new BigDecimal("85.00"), result);

        // convert $8 to CZK

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

        result = c.convertFrom(BigDecimal.valueOf(8));

        assertEquals(new BigDecimal("136.00"), result);

        // convert 1003CZK to USD

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

        result = c.convertTo(BigDecimal.valueOf(1003));

        assertEquals(new BigDecimal("59.00"), result);

    }

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

     * with it.

     */

    public void testCurrencySKKCZK() throws Exception {

        Convertor c = createSKKtoCZK();

        BigDecimal result;

        // convert 16CZK using c:

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

        result = c.convertFrom(BigDecimal.valueOf(16));

        assertEquals(new BigDecimal("20.00"), result);

        // convert 500SKK to CZK

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

        result = c.convertTo(BigDecimal.valueOf(500));

        assertEquals(new BigDecimal("400.00"), result);

   }

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

     * with it.

     */

    public void testCurrencyUSDUSD() throws Exception {

        Convertor c = createUSDtoUSD();

        BigDecimal result;

        // convert 1USD using c:

        // assertEquals("Result is 1 USD");

        result = c.convertFrom(BigDecimal.valueOf(1));

        assertEquals(new BigDecimal("1.00"), result);

        // convert 500USD to USD

        // assertEquals("Result is 500 USD");

        result = c.convertTo(BigDecimal.valueOf(500));

        assertEquals(new BigDecimal("500.00"), result);

   }

}