FINISH ALL TODOS

// TODO: complete the methods /** * Immutable Data Class for video objects. * Comprises a triple: title, year, director. * * @objecttype Immutable Data Class * @objectinvariant * Title is non-null, no leading or final spaces, not empty string. * @objectinvariant * Year is greater than 1800, less than 5000. * @objectinvariant * Director is non-null, no leading or final spaces, not empty string. */ final class VideoObj implements Comparable { /** @invariant non-null, no leading or final spaces, not empty string */ private final String _title; /** @invariant greater than 1800, less than 5000 */ private final int _year; /** @invariant non-null, no leading or final spaces, not empty string */ private final String _director;

/** * Initialize all object attributes. * Title and director are "trimmed" to remove leading and final space. * @throws IllegalArgumentException if any object invariant is violated. */ VideoObj(String title, int year, String director) { // TODO _title = null; _year = 0; _director = null; }

/** * Return the value of the attribute. */ public String director() { // TODO return "director"; }

/** * Return the value of the attribute. */ public String title() { // TODO return "title"; }

/** * Return the value of the attribute. */ public int year() { // TODO return -1; }

/** * Compare the attributes of this object with those of thatObject. * @param thatObject the Object to be compared. * @return deep equality test between this and thatObject. */ public boolean equals(Object thatObject) { // TODO return false; }

/** * Return a hash code value for this object using the algorithm from Bloch: * fields are added in the following order: title, year, director. */ public int hashCode() { // TODO return -1; }

/** * Compares the attributes of this object with those of thatObject, in * the following order: title, year, director. * @param thatObject the Object to be compared. * @return a negative integer, zero, or a positive integer as this * object is less than, equal to, or greater thatObject. * @throws ClassCastException if thatObject has an incompatible type. */ public int compareTo(Object thatObject) { // TODO return -1; }

/** * Return a string representation of the object in the following format: * "title (year) : director". */ public String toString() { // TODO return "El Mariachi (1996) : Rodriguez"; } }

import junit.framework.Assert; import junit.framework.TestCase;

// TODO: complete the tests public class VideoTEST extends TestCase { public VideoTEST(String name) { super(name); } public void testConstructorAndAttributes() { String title1 = "XX"; String director1 = "XY"; String title2 = " XX "; String director2 = " XY "; int year = 2002;

VideoObj v1 = new VideoObj(title1, year, director1); Assert.assertSame(title1, v1.title()); Assert.assertEquals(year, v1.year()); Assert.assertSame(director1, v1.director());

VideoObj v2 = new VideoObj(title2, year, director2); Assert.assertEquals(title1, v2.title()); Assert.assertEquals(director1, v2.director()); }

public void testConstructorExceptionYear() { try { new VideoObj("X", 1800, "Y"); Assert.fail(); } catch (IllegalArgumentException e) { } try { new VideoObj("X", 5000, "Y"); Assert.fail(); } catch (IllegalArgumentException e) { } try { new VideoObj("X", 1801, "Y"); new VideoObj("X", 4999, "Y"); } catch (IllegalArgumentException e) { Assert.fail(); } }

public void testConstructorExceptionTitle() { try { new VideoObj(null, 2002, "Y"); Assert.fail(); } catch (IllegalArgumentException e) { } try { new VideoObj("", 2002, "Y"); Assert.fail(); } catch (IllegalArgumentException e) { } try { new VideoObj(" ", 2002, "Y"); Assert.fail(); } catch (IllegalArgumentException e) { } }

public void testConstructorExceptionDirector() { // TODO }

public void testHashCode() { Assert.assertEquals (-875826552, new VideoObj("None", 2009, "Zebra").hashCode()); Assert.assertEquals (-1391078111, new VideoObj("Blah", 1954, "Cante").hashCode()); }

public void testEquals() { // TODO }

public void testCompareTo() { // TODO }

public void testToString() { // TODO } }