jtulach@61: 
jtulach@61: package org.apidesign.delegatingwriter;
jtulach@61: 
jtulach@61: import java.io.BufferedWriter;
jtulach@61: import java.io.IOException;
jtulach@61: import java.io.StringWriter;
jtulach@61: import org.junit.Before;
jtulach@61: import org.junit.Test;
jtulach@61: import static org.junit.Assert.*;
jtulach@61: 
jtulach@61: /**
jtulach@61:  *
jtulach@61:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jtulach@61:  */
jtulach@61: public class BufferedWriterThrowingExceptionTest {
jtulach@61:     private StringWriter writer;
jtulach@61:     
jtulach@61:     public BufferedWriterThrowingExceptionTest() {
jtulach@61:     }
jtulach@61: 
jtulach@61:     @Before
jtulach@61:     public void setUp() {
jtulach@61:         writer = new StringWriter();
jtulach@61:     }
jtulach@61:     
jtulach@61:     @Test
jtulach@61:     public void testBehaviourOfRealBufferInJDK() throws IOException {
jtulach@61:         BufferedWriter bufferedWriter = new BufferedWriter(writer);
jtulach@61:         doAppendHello(bufferedWriter, "Hello!");
jtulach@61:         bufferedWriter.flush();
jtulach@61:         
jtulach@61:         assertEquals("Hello!", writer.toString());
jtulach@61:     }
jtulach@61: 
jtulach@61:     @Test
jtulach@61:     public void testBehaviourOfBufferThatThrowsExceptionWhenAppendIsCalled() throws IOException {
jtulach@61:         BufferedWriter bufferedWriter = new AltBufferedWriter(writer, AltBufferedWriter.Behaviour.THROW_EXCEPTION);
jtulach@61:         doAppendHello(bufferedWriter, "Hello!");
jtulach@61:         bufferedWriter.flush();
jtulach@61:         
jtulach@61:         assertEquals("Hello!", writer.toString());
jtulach@61:     }
jtulach@61: 
jtulach@64:     @Test
jtulach@64:     public void testBehaviourWhenDelegatingConditionallyIsOK() throws IOException {
jtulach@64:         BufferedWriter bufferedWriter = new AltBufferedWriter(writer, AltBufferedWriter.Behaviour.DELEGATE_CONDITIONALLY);
jtulach@64:         doAppendHello(bufferedWriter, "Hello!");
jtulach@64:         bufferedWriter.flush();
jtulach@64:         
jtulach@64:         assertEquals("Hello!", writer.toString());
jtulach@64:     }
jtulach@61: 
jtulach@61:     private void doAppendHello(BufferedWriter bufferedWriter, CharSequence what) throws IOException {
jtulach@61:         // BEGIN: writer.throw.client
jtulach@61:         try {
jtulach@61:             bufferedWriter.append(what);
jtulach@61:         } catch (UnsupportedOperationException ex) {
jtulach@61:             bufferedWriter.write(what.toString());
jtulach@61:         }
jtulach@61:         // END: writer.throw.client
jtulach@61:     }
jtulach@61:     
jtulach@61: }