package api.usage;

import api.Writer;

import java.io.IOException;

import java.io.StringWriter;

import java.io.StringWriter;

import org.junit.Before;

import org.junit.Test;

import static org.junit.Assert.*;

/** Converting the Crypto example to the APIs that split client and provider

 * concerns and do not mix delegation and subclassing.

 *

 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 */

public class BufferedWriterCryptoTest {

    private StringWriter writer;

    public BufferedWriterCryptoTest() {

    }

    @Before

    public void setUp() {

        writer = new StringWriter();

    }

    @Test

    public void testBehaviourOfRealBufferInJDKWorksFine() throws IOException {

        Writer bufferedWriter = CryptoWriter.create(Writer.create(writer));

        bufferedWriter.write("VMS");

        bufferedWriter.flush();

        assertEquals("Converted", "WNT", writer.toString());

    }

}