Tugas 10 Unit Testing

Nama : Afel Allaric Absor
NRP   : 5025231140
Kelas  : Pemrograman Bebasis Objek (A)

                                                              Tugas 10 Unit Testing

- Isi file SalesItem.java : 

import java.util.ArrayList;
import java.util.Iterator;
/**
 * The class represents sales items on an online e-commerce site (such
 * as Amazon.com). SalesItem objects store all information relevant to
 * this item, including description, price, customer comments, etc.
 *
 * NOTE: The current version is incomplete! Currently, only code
 * dealing with customer comments is here.
 *
 * @author Michael Kölling and David J. Barnes
 * @version 0.1 (2011-07-31)
 */
public class SalesItem
{
    private String name;
    private int price; // in cents
    private ArrayList<Comment> comments;
    /**
     * Create a new sales item.
     */
    public SalesItem(String name, int price)
    {
        this.name = name;
        this.price = price;
        comments = new ArrayList<Comment>();
    }
    /**
     * Return the name of this item.
     */
    public String getName()
    {
        return name;
    }
    /**
     * Return the price of this item.
     */
    public int getPrice()
    {
        return price;
    }
    /**
     * Return the number of customer comments for this item.
     */
    public int getNumberOfComments()
    {
        return comments.size();
    }
    /**
     * Add a comment to the comment list of this sales item. Return
     * true if successful, false if the comment was rejected.
     *
     * The comment will be rejected if the same author has already
     * left a comment or if the rating is invalid. Valid ratings are
     * numbers between 1 and 5 (inclusive).
     */
    public boolean addComment(String author, String text, int rating)
    {
        if(ratingInvalid(rating)) { // reject invalid ratings
            return false;
        }
        if(findCommentByAuthor(author) != null) {
// reject multiple comments by same author

            return false;
        }
        comments.add(new Comment(author, text, rating));
        return true;
    }
    /**
     * Remove the comment stored at the index given. If the index is
     * invalid, do nothing.
     */
    public void removeComment(int index)
    {
        if(index >=0 && index < comments.size()) { // index is valid
            comments.remove(index);
        }
    }
    /**
     * Upvote the comment at 'index'. That is: count this comment as
     * more helpful. If the index is invalid, do nothing.
     */
    public void upvoteComment(int index)
    {
        if(index >=0 && index < comments.size()) { // index is valid
            comments.get(index).upvote();
        }
    }
    /**
     * Downvote the comment at 'index'. That is: count this comment as
     * less helpful. If the index is invalid, do nothing.
     */
    public void downvoteComment(int index)
    {
        if(index >=0 && index < comments.size()) { // index is valid
            comments.get(index).downvote();
        }
    }
    /**
     * Show all comments on screen. (Currently, for testing purposes:
     * print to the terminal. Modify later for web display.)
     */
    public void showInfo()
    {
        System.out.println("*** " + name + " ***");
        System.out.println("Price: " + priceString(price));
        System.out.println();
        System.out.println("Customer comments:");
        for(Comment comment : comments) {
            System.out.println("-----------------------------------");
            System.out.println(comment.getFullDetails());
        }
        System.out.println();
        System.out.println("=====================================");
    }
    /**
     * Return the most helpful comment. The most useful comment is the
     * one with the highest vote balance. If there are multiple
     * comments with equal highest balance, return any one of them.
     */
    public Comment findMostHelpfulComment()
    {
        Iterator<Comment> it = comments.iterator();
        Comment best = it.next();
        while(it.hasNext()) {
            Comment current = it.next();
            if(current.getVoteCount() > best.getVoteCount()) {
                best = current;
            }
        }
        return best;
    }
    /**
     * Check whether the given rating is invalid. Return true if it is
     * invalid. Valid ratings are in the range [1..5].
     */
    private boolean ratingInvalid(int rating)
    {
        return rating < 1 || rating > 5;
    }
    /**
     * Find the comment by the author with the given name.
     *
     * @return The comment if it exists, null if it doesn'>t.
     */
    private Comment findCommentByAuthor(String author)
    {
        for(Comment comment : comments) {
            if(comment.getAuthor().equals(author)) {
                return comment;
            }
        }
        return null;
    }
    /**
     * For a price given as an int, return a readable String
     * representing the same price. The price is given in whole cents.
     * For example for price==12345, the following String
     * is returned: $123.45
     */
    private String priceString(int price)
    {
        int dollars = price / 100;
        int cents = price - (dollars*100);
        if(cents <= 9) {
            return "$" + dollars + ".0" + cents; // zero padding
        }
        else {
            return "$" + dollars + "." + cents;
        }
    }
}

- Isi file dari Comment.java :

public class Comment {
    private String author;
    private String text;
    private int rating;
    private int votes;

    /**
     * Constructor for Comment.
     */
    public Comment(String author, String text, int rating) {
        this.author = author;
        this.text = text;
        this.rating = rating;
        this.votes = 0; 
    }

    /**
     * Get the author of the comment.
     */
    public String getAuthor() {
        return author;
    }

    /**
     * Get the full details of the comment.
     */
    public String getFullDetails() {
        return "Author: " + author + "\n" +
                "Rating: " + rating + "\n" +
                "Votes: " + votes + "\n" +
                "Comment: " + text;
    }

    /**
     * Get the current vote count.
     */
    public int getVoteCount() {
        return votes;
    }

    /**
     * Upvote the comment.
     */
    public void upvote() {
        votes++;
    }

    /**
     * Downvote the comment.
     */
    public void downvote() {
        votes--;
    }
}

- isi file dari SalesItemTest.java :

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.Test;

public class SalesItemTest {

    @Test
    public void testAddCommentAndCount() {
        SalesItem salesItem = new SalesItem("Java Book", 12345);
        
        assertTrue(salesItem.addComment("James Duckling", "Great book...", 4));
        assertTrue(salesItem.addComment("Fred", "Like it", 2));
        
        assertEquals(2, salesItem.getNumberOfComments());
    }

    @Test
    public void testRejectDuplicateAuthorComment() {
        SalesItem salesItem = new SalesItem("Java Book", 12345);
        
        assertTrue(salesItem.addComment("James Duckling", "Great book...", 4));
        
        assertEquals(false, salesItem.addComment("James Duckling", "Not as good on second read.", 3));
    }

    @Test
    public void testRejectInvalidRating() {
        SalesItem salesItem = new SalesItem("Java Book", 12345);
        
        assertEquals(false, salesItem.addComment("Jane Doe", "Not my style", 0));
        
        assertEquals(false, salesItem.addComment("John Doe", "Amazing read!", 6));
    }
}

- Hasil kode saat dijalankan :

- Link repository github berisi kode : https://github.com/afelallaric/Tugas-PBO-10-Unit-Testing.git