src/test/java/org/apache/maven/shared/io/logging/DefaultMessageHolderTest.java

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 * 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.maven.shared.io.logging;

import java.io.PrintWriter;
import java.io.StringWriter;

import junit.framework.TestCase;

public class DefaultMessageHolderTest extends TestCase {

    // MessageHolder newMessage();
    // int size();
    // String render();
    public void testNewMessageIncrementsSizeWhenEmpty() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        MessageHolder test = mh.newMessage();

        assertSame(mh, test);

        assertEquals(1, mh.size());

        assertEquals("", mh.render());
    }

    // MessageHolder append( CharSequence messagePart );
    // int size();
    // String render();
    public void testAppendCreatesNewMessageIfNoneCurrent() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        MessageHolder test = mh.append("test");

        assertSame(mh, test);

        assertEquals(1, mh.size());

        assertEquals("[1] [INFO] test", mh.render());
    }

    // MessageHolder append( Throwable error );
    // int size();
    // String render();
    public void testAppendErrorCreatesNewMessageIfNoneCurrent() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        NullPointerException npe = new NullPointerException();

        MessageHolder test = mh.append(npe);

        assertSame(mh, test);

        assertEquals(1, mh.size());

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);

        npe.printStackTrace(pw);

        assertEquals("[1] [INFO] Error:\n" + sw.toString(), mh.render());
    }

    // MessageHolder newMessage();
    // MessageHolder append( CharSequence messagePart );
    // int size();
    // String render();
    public void testNewMessageThenAppendOnlyIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        MessageHolder test = mh.newMessage();

        assertSame(mh, test);

        test = mh.append("test");

        assertSame(mh, test);

        assertEquals(1, mh.size());

        assertEquals("[1] [INFO] test", mh.render());
    }

    // MessageHolder newMessage();
    // MessageHolder append( CharSequence messagePart );
    // MessageHolder append( CharSequence messagePart );
    // int size();
    // String render();
    public void testNewMessageThenAppendTwiceOnlyIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        MessageHolder test = mh.newMessage();

        assertSame(mh, test);

        test = mh.append("test");

        assertSame(mh, test);

        test = mh.append(" again");

        assertSame(mh, test);

        assertEquals(1, mh.size());

        assertEquals("[1] [INFO] test again", mh.render());
    }

    // MessageHolder newMessage();
    // MessageHolder append( CharSequence messagePart );
    // MessageHolder append( Throwable error );
    // int size();
    // String render();
    public void testNewMessageThenAppendBothMessageAndErrorOnlyIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();

        assertEquals(0, mh.size());

        MessageHolder test = mh.newMessage();

        assertSame(mh, test);

        test = mh.append("test");

        assertSame(mh, test);

        NullPointerException npe = new NullPointerException();

        test = mh.append(npe);

        assertSame(mh, test);

        assertEquals(1, mh.size());

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);

        npe.printStackTrace(pw);

        assertEquals("[1] [INFO] test\nError:\n" + sw.toString(), mh.render());
    }

    // MessageHolder addMessage( CharSequence messagePart );
    // int size();
    // String render();
    public void testAddMessageIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();
        MessageHolder check = mh.addMessage("test");

        assertSame(mh, check);

        assertEquals(1, mh.size());
        assertEquals("[1] [INFO] test", mh.render());
    }

    // MessageHolder addMessage( CharSequence messagePart );
    // int size();
    // String render();
    public void testAddMessageTwiceIncrementsSizeByTwo() {
        MessageHolder mh = new DefaultMessageHolder();
        MessageHolder check = mh.addMessage("test");

        assertSame(mh, check);

        check = mh.addMessage("test2");

        assertSame(mh, check);

        assertEquals(2, mh.size());
        assertEquals("[1] [INFO] test\n\n[2] [INFO] test2", mh.render());
    }

    // MessageHolder addMessage( CharSequence messagePart, Throwable error );
    // int size();
    // String render();
    public void testAddMessageWithErrorIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();

        NullPointerException npe = new NullPointerException();

        MessageHolder check = mh.addMessage("test", npe);

        assertSame(mh, check);

        assertEquals(1, mh.size());

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);

        npe.printStackTrace(pw);

        assertEquals("[1] [INFO] test\nError:\n" + sw.toString(), mh.render());
    }

    // MessageHolder addMessage( CharSequence messagePart, Throwable error );
    // MessageHolder addMessage( CharSequence messagePart );
    // int size();
    // String render();
    public void testAddMessageWithErrorThenWithJustMessageIncrementsSizeByTwo() {
        MessageHolder mh = new DefaultMessageHolder();

        NullPointerException npe = new NullPointerException();

        MessageHolder check = mh.addMessage("test", npe);

        assertSame(mh, check);

        check = mh.addMessage("test2");

        assertSame(mh, check);

        assertEquals(2, mh.size());

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);

        npe.printStackTrace(pw);

        assertEquals("[1] [INFO] test\nError:\n" + sw.toString() + "\n\n[2] [INFO] test2", mh.render());
    }

    // MessageHolder addMessage( Throwable error );
    // int size();
    // String render();
    public void testAddMessageWithJustErrorIncrementsSizeByOne() {
        MessageHolder mh = new DefaultMessageHolder();

        NullPointerException npe = new NullPointerException();

        MessageHolder check = mh.addMessage(npe);

        assertSame(mh, check);

        assertEquals(1, mh.size());

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);

        npe.printStackTrace(pw);

        assertEquals("[1] [INFO] Error:\n" + sw.toString(), mh.render());
    }

    // boolean isEmpty();
    public void testIsEmptyAfterConstruction() {
        assertTrue(new DefaultMessageHolder().isEmpty());
    }

    // boolean isEmpty();
    public void testIsNotEmptyAfterConstructionAndNewMessageCall() {
        assertFalse(new DefaultMessageHolder().newMessage().isEmpty());
    }

    public void testAppendCharSequence() {
        MessageHolder mh = new DefaultMessageHolder();
        mh.newMessage().append(new StringBuffer("This is a test"));

        assertTrue(mh.render().indexOf("This is a test") > -1);
    }
}