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/*
 * 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.sshd.server.shell;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import org.apache.sshd.util.BaseTest;
import org.apache.sshd.util.BogusEnvironment;
import org.apache.sshd.util.BogusExitCallback;
import org.apache.sshd.util.BogusInvertedShell;
import org.junit.Test;

import static junit.framework.Assert.assertEquals;

public class InvertedShellWrapperTest extends BaseTest {

    @Test
    public void testStreamsAreFlushedBeforeClosing() throws Exception {
        BogusInvertedShell shell = newShell("out", "err");
        shell.setAlive(false);
        ByteArrayInputStream in = new ByteArrayInputStream("in".getBytes());
        ByteArrayOutputStream out = new ByteArrayOutputStream(50);
        ByteArrayOutputStream err = new ByteArrayOutputStream();

        InvertedShellWrapper wrapper = new InvertedShellWrapper(shell);
        wrapper.setInputStream(in);
        wrapper.setOutputStream(out);
        wrapper.setErrorStream(err);
        wrapper.setExitCallback(new BogusExitCallback());
        wrapper.start(new BogusEnvironment());

        wrapper.pumpStreams();

        // check the streams were flushed before exiting
        assertEquals("in", shell.getInputStream().toString());
        assertEquals("out", out.toString());
        assertEquals("err", err.toString());
    }

    private BogusInvertedShell newShell(String contentOut, String contentErr) {
        ByteArrayOutputStream in = new ByteArrayOutputStream(20);
        ByteArrayInputStream out = new ByteArrayInputStream(contentOut.getBytes());
        ByteArrayInputStream err = new ByteArrayInputStream(contentErr.getBytes());
        return new BogusInvertedShell(in, out, err);
    }

}