Android Open Source - AudioBook Bookshelf Controller Test

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Java Source Code

/**
 *  This work is licensed under the Creative Commons Attribution-NonCommercial-
 *  NoDerivs 3.0 Unported License. To view a copy of this license, visit
 *  http://creativecommons.org/licenses/by-nc-nd/3.0/ or send a letter to 
 *  Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 
 *  94041, USA./*from   ww  w  .  ja v a  2s . com*/
 * 
 *  Use of this work is permitted only in accordance with license rights granted.
 *  Materials provided "AS IS"; no representations or warranties provided.
 * 
 *  Copyright ? 2012 Marcus Parkkinen, Aki K?kel?, Fredrik ?hs.
 **/

package edu.chalmers.dat255.audiobookplayer.ctrl;

import java.util.LinkedList;
import java.util.List;

import android.test.AndroidTestCase;
import edu.chalmers.dat255.audiobookplayer.model.Book;
import edu.chalmers.dat255.audiobookplayer.model.Bookshelf;
import edu.chalmers.dat255.audiobookplayer.model.Track;

/**
 * Test case for BookshelfController.
 * <p>
 * Tests selecting a track and book at the same time (no other features are
 * implemented).
 * <p>
 * Ignores testing methods which only relay the calls directly to the model.
 * 
 * @author Aki K?kel?
 * @version 0.2
 * 
 */
public class BookshelfControllerTest extends AndroidTestCase {

  // BookshelfController - the test object
  private BookshelfController bookshelfController;

  // Books
  private static final String TITLE0 = "title0";
  private static final String TITLE1 = "title1";
  private static final String TITLE2 = "title2";

  // Constant values; 'magic numbers'

  // indices to test selecting.
  private static final int LEGAL_BOOK_INDEX = 2;
  private static final int LEGAL_TRACK_INDEX = 2;

  // since we will be testing with 3 books, 3 is an illegal index (0-2 are
  // legal)
  private static final int ILLEGAL_BOOK_INDEX = 3;

  // since we will be testing with 3 tracks, 3 is an illegal index (0-2 are
  // legal)
  private static final int ILLEGAL_TRACK_INDEX = 3;

  private static final String PATH0 = "p0";
  private static final String PATH1 = "p1";
  private static final String PATH2 = "p2";

  private static final int DURATION0 = 5000;
  private static final int DURATION1 = 6000;
  private static final int DURATION2 = 7000;

  /*
   * (non-Javadoc)
   * 
   * @see android.test.AndroidTestCase#setUp()
   */
  @Override
  protected void setUp() {
    try {
      super.setUp();
    } catch (Exception e) {
      // catch exceptions from super.setUp() and fail
      fail("setUp failed + " + e.getMessage());
    }
    // NOTE: do not change these values; the tests depend on them

    // Create tracks
    Track t0 = new Track(PATH0, DURATION0);
    Track t1 = new Track(PATH1, DURATION1);
    Track t2 = new Track(PATH2, DURATION2);

    // Put them in a list
    List<Track> tracks = new LinkedList<Track>();
    tracks.add(t0);
    tracks.add(t1);
    tracks.add(t2);

    // Create books
    Book b0 = new Book(tracks, TITLE0);
    Book b1 = new Book(tracks, TITLE1);
    Book b2 = new Book(tracks, TITLE2);

    // Create a new bookshelf to create the controller with
    Bookshelf bookshelf = new Bookshelf();

    // Add books to the bookshelf (to add to the allowed indices)
    bookshelf.addBook(b0);
    bookshelf.addBook(b1);
    bookshelf.addBook(b2);

    // Create a new controller with the bookshelf
    bookshelfController = new BookshelfController(bookshelf);

  }

  /**
   * Tests selecting track and book.
   */
  public void testSetSelectedTrack() {

    // ensure that the first book and track are selected (index 0) as
    // intended
    assertTrue(bookshelfController.getSelectedBookIndex() == 0);
    assertTrue(bookshelfController.getSelectedTrackIndex() == 0);

    // select a book and track at legal indices
    bookshelfController.setSelectedTrack(LEGAL_BOOK_INDEX,
        LEGAL_TRACK_INDEX);

    // ensure that the indices are changed properly
    assertTrue(indicesAreUnchanged());

    /*
     * ensure that nothing is changed if the indices are out of bounds for
     * either the track or the book, or both.
     */

    // setting to illegal book index, illegal track index
    bookshelfController.setSelectedTrack(ILLEGAL_BOOK_INDEX,
        ILLEGAL_TRACK_INDEX);
    // ensure that nothing changed.
    assertTrue(indicesAreUnchanged());

    // setting to illegal book index, legal track index
    bookshelfController.setSelectedTrack(ILLEGAL_BOOK_INDEX,
        LEGAL_TRACK_INDEX);
    // ensure that nothing changed.
    assertTrue(indicesAreUnchanged());

    // setting to legal book index, illegal track index
    bookshelfController.setSelectedTrack(LEGAL_BOOK_INDEX,
        ILLEGAL_TRACK_INDEX);
    // ensure that nothing changed.
    assertTrue(indicesAreUnchanged());

  }

  /**
   * @return True if the selected book and selected track indices are the
   *         legal ones specified in BookshelfControllerTest (i.e. changed).
   */
  private boolean indicesAreUnchanged() {
    return bookshelfController.getSelectedBookIndex() == LEGAL_BOOK_INDEX
        && bookshelfController.getSelectedTrackIndex() == LEGAL_TRACK_INDEX;
  }

}

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