/*
    * 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.maven.shared.utils.cli;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  
  public class StreamPollFeederTest {
  
      @Test
      public void waitUntilFeederDoneOnInputStream() throws Exception {
  
          ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
          StreamPollFeeder streamPollFeeder = new StreamPollFeeder(System.in, outputStream);
  
          // start thread
          streamPollFeeder.start();
  
          // wait a moment
          Thread.sleep(100);
  
          // wait until process finish
          streamPollFeeder.waitUntilDone();
          assertNull(streamPollFeeder.getException());
      }
  
      @Test
      public void dataShouldBeCopied() throws InterruptedException, IOException {
  
          StringBuilder TEST_DATA = new StringBuilder();
          for (int i = 0; i < 100; i++) {
              TEST_DATA.append("TestData");
          }
  
          ByteArrayInputStream inputStream =
                  new ByteArrayInputStream(TEST_DATA.toString().getBytes());
          ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
  
          StreamPollFeeder streamPollFeeder = new StreamPollFeeder(inputStream, outputStream);
  
          streamPollFeeder.start();
  
          //  wait until all data from steam will be read
          while (outputStream.size() < TEST_DATA.length()) {
              Thread.sleep(100);
          }
  
          // wait until process finish
          streamPollFeeder.waitUntilDone();
          assertNull(streamPollFeeder.getException());
  
          assertEquals(TEST_DATA.toString(), outputStream.toString());
      }
  }