Commons IO example source code file (StringBuilderWriterTest.java)

This example Commons IO source code file (StringBuilderWriterTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons IO tags/keywords

b, bar, barfoo, f, foo, foo, foobar, io, ioexception, ioexception, stringbuilderwriter, stringbuilderwriter, stringbuilderwritertest, writer, writer

The Commons IO StringBuilderWriterTest.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.io.output;

import java.io.IOException;
import java.io.Writer;

import junit.framework.TestCase;

/**
 * Test case for {@link StringBuilderWriter}.
 *
 * @version $Revision: 1021884 $ $Date: 2010-10-12 19:49:16 +0100 (Tue, 12 Oct 2010) $
 */
public class StringBuilderWriterTest extends TestCase {
    private static final char[] FOOBAR_CHARS = new char[] {'F', 'o', 'o', 'B', 'a', 'r'};

    /**
     * Contruct a new test case.
     * @param name The name of the test
     */
    public StringBuilderWriterTest(String name) {
        super(name);
    }

    /** Test {@link StringBuilderWriter} constructor. */
    public void testAppendConstructCapacity() throws IOException {
        Writer writer = new StringBuilderWriter(100);
        writer.append("Foo");
        assertEquals("Foo", writer.toString());
    }

    /** Test {@link StringBuilderWriter} constructor. */
    public void testAppendConstructStringBuilder() {
        StringBuilder builder = new StringBuilder("Foo");
        StringBuilderWriter writer = new StringBuilderWriter(builder);
        writer.append("Bar");
        assertEquals("FooBar", writer.toString());
        assertSame(builder, writer.getBuilder());
    }

    /** Test {@link StringBuilderWriter} constructor. */
    public void testAppendConstructNull() throws IOException {
        Writer writer = new StringBuilderWriter((StringBuilder)null);
        writer.append("Foo");
        assertEquals("Foo", writer.toString());
    }

    /** Test {@link Writer#append(char)}. */
    public void testAppendChar() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.append('F').append('o').append('o');
        assertEquals("Foo", writer.toString());
    }

    /** Test {@link Writer#append(CharSequence)}. */
    public void testAppendCharSequence() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.append("Foo").append("Bar");
        assertEquals("FooBar", writer.toString());
    }

    /** Test {@link Writer#append(CharSequence, int, int)}. */
    public void testAppendCharSequencePortion() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.append("FooBar", 3, 6).append(new StringBuffer("FooBar"), 0, 3);
        assertEquals("BarFoo", writer.toString());
    }

    /** Test {@link Writer#close()}. */
    public void testClose() {
        Writer writer = new StringBuilderWriter();
        try {
            writer.append("Foo");
            writer.close();
            writer.append("Bar");
        } catch (Throwable t) {
            fail("Threw: " + t);
        }
        assertEquals("FooBar", writer.toString());
    }

    /** Test {@link Writer#write(int)}. */
    public void testWriteChar() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.write('F');
        assertEquals("F", writer.toString());
        writer.write('o');
        assertEquals("Fo", writer.toString());
        writer.write('o');
        assertEquals("Foo", writer.toString());
    }

    /** Test {@link Writer#write(char[])}. */
    public void testWriteCharArray() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.write(new char[] {'F', 'o', 'o'});
        assertEquals("Foo", writer.toString());
        writer.write(new char[] {'B', 'a', 'r'});
        assertEquals("FooBar", writer.toString());
    }

    /** Test {@link Writer#write(char[], int, int)}. */
    public void testWriteCharArrayPortion() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.write(FOOBAR_CHARS, 3, 3);
        assertEquals("Bar", writer.toString());
        writer.write(FOOBAR_CHARS, 0, 3);
        assertEquals("BarFoo", writer.toString());
    }

    /** Test {@link Writer#write(String)}. */
    public void testWriteString() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.write("Foo");
        assertEquals("Foo", writer.toString());
        writer.write("Bar");
        assertEquals("FooBar", writer.toString());
    }

    /** Test {@link Writer#write(String, int, int)}. */
    public void testWriteStringPortion() throws IOException {
        Writer writer = new StringBuilderWriter();
        writer.write("FooBar", 3, 3);
        assertEquals("Bar", writer.toString());
        writer.write("FooBar", 0, 3);
        assertEquals("BarFoo", writer.toString());
    }

}