/*
 *  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.tools.ant.taskdefs;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

import org.apache.tools.ant.DefaultLogger;
import org.apache.tools.ant.Project;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

import static org.apache.tools.ant.util.FileUtils.readFully;
import static org.junit.Assert.assertEquals;

/**
 * Test Java-dependent parts of the Echo task.
 */
public class EchoTest {

    @Rule
    public TemporaryFolder folder = new TemporaryFolder();

    private EchoTestLogger logger;

    private Echo echo;

    @Before
    public void setUp() {
        Project p = new Project();
        p.init();
        logger = new EchoTestLogger();
        p.addBuildListener(logger);
        echo = new Echo();
        echo.setProject(p);
    }

    @Test
    public void testLogBlankEcho() {
        echo.setTaskName("testLogBlankEcho");
        echo.execute();
        assertEquals("[testLogBlankEcho] ", logger.lastLoggedMessage);
    }

    @Test
    public void testLogUTF8Echo() throws IOException {
        File removeThis = folder.newFile("abc.txt");
        Charset cs = StandardCharsets.UTF_8;
        String msg = "\u00e4\u00a9";

        echo.setTaskName("testLogUTF8Echo");
        echo.setMessage(msg);
        echo.setFile(removeThis);
        echo.setEncoding(cs.name());
        echo.execute();

        assertEquals(msg, readFully(new InputStreamReader(new FileInputStream(removeThis), cs)));
    }

    private class EchoTestLogger extends DefaultLogger {
        String lastLoggedMessage;

        /**
         * Create a new EchoTestLogger.
         */
        public EchoTestLogger() {
            super();
            this.setMessageOutputLevel(Project.MSG_DEBUG);
            this.setOutputPrintStream(new PrintStream(new ByteArrayOutputStream(256)));
            this.setErrorPrintStream(new PrintStream(new ByteArrayOutputStream(256)));
        }

        /**
         * {@inheritDoc}
         */
        protected void log(String message) {
            this.lastLoggedMessage = message;
        }

    }
}
