PBO-10/11 Implementasi Unit testing dan Debugging

Laporan mata kuliah Pemrograman Berorientasi Objek (A) - Pertemuan 10

Nama: Nabil Irawan

NRP: 5025241231

Kelas: Pemrograman Berorientasi Objek (A)

fajarbaskoro: PBO2019 - Testing dan Debuggingfajarbaskoro

Laporan

Implementasi Unit testing dan Debugging

SalesItem merupakan class utama yang merepresentasikan produk dengan harga dan daftar ulasan. Class ini menyimpan koleksi objek Comment dan menyediakan operasi seperti menambah dan menghapus komentar, voting, menampilkan info, serta mencari komentar. Comment merupakan model sederhana untuk satu ulasan lengkap dengan operasi upvote dan downvote dengan formatter detail. SalesItemTest merupakan suite JUnit yang menguji perilaku kedua class sebelumnya, seperti pembuatan SalesItem, validasi penambahan komentar, efek upvote dan downvote terhadap penentuan komentar, serta keluaran showInfo().

SalesItem.java

Code:

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class SalesItem {
    private String title;
    private int unitPrice;
    private final List<Comment> feedbacks;

    public SalesItem(String name, int price) {
        this.title = name;
        this.unitPrice = price;
        this.feedbacks = new ArrayList<>();
    }

    public String getName() {
        return title;
    }

    public int getPrice() {
        return unitPrice;
    }

    public int getNumberOfComments() {
        return feedbacks.size();
    }

    public boolean addComment(String author, String message, int rating) {
        if (rating < 0 || rating > 5) return false;
        feedbacks.add(new Comment(author, message, rating));
        return true;
    }

    public boolean removeComment(int index) {
        if (index < 0 || index >= feedbacks.size()) return false;
        feedbacks.remove(index);
        return true;
    }

    public boolean upvoteComment(int index) {
        if (index < 0 || index >= feedbacks.size()) return false;
        feedbacks.get(index).upvote();
        return true;
    }

    public boolean downvoteComment(int index) {
        if (index < 0 || index >= feedbacks.size()) return false;
        feedbacks.get(index).downvote();
        return true;
    }

    public Comment findMostHelpfulComment() {
        if (feedbacks.isEmpty()) return null;
        Comment best = feedbacks.get(0);
        for (int i = 1; i < feedbacks.size(); i++) {
            Comment c = feedbacks.get(i);
            if (c.getVoteCount() > best.getVoteCount()) best = c;
        }
        return best;
    }

    public void showInfo() {
        System.out.println(title + ": " + priceString(unitPrice));
        System.out.println();
        Iterator<Comment> it = feedbacks.iterator();
        while (it.hasNext()) {
            System.out.println(it.next().getFullDetails());
            if (it.hasNext()) System.out.println();
        }
    }

    private String priceString(int price) {
        int dollars = price / 100;
        int cents = price % 100;
        if (cents <= 9) {
            return "$" + dollars + ".0" + cents;
        } else {
            return "$" + dollars + "." + cents;
        }
    }
}

Comment.java

Code:

public class Comment {
    private String writer;
    private String body;
    private int score;
    private int votes;

    public Comment(String author, String text, int rating) {
        this.writer = author;
        this.body = text;
        this.score = Math.max(0, Math.min(rating, 5));
        this.votes = 0;
    }

    public String getAuthor() {
        return writer;
    }

    public String getText() {
        return body;
    }

    public int getRating() {
        return score;
    }

    public int getVoteCount() {
        return votes;
    }

    public void upvote() {
        votes++;
    }

    public void downvote() {
        votes--;
    }

    public String getFullDetails() {
        return "Author: " + writer + "\n" +
               "Rating: " + score + "/5\n" +
               "Votes: " + votes + "\n" +
               "Comment: " + body;
    }
}

SalesItemTest.java

Code:

import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;

public class SalesItemTest {

    @Test
    public void testConstructorAndGetters() {
        SalesItem item = new SalesItem("Laptop", 1000000);
        assertEquals("Laptop", item.getName());
        assertEquals(1000000, item.getPrice());
        assertEquals(0, item.getNumberOfComments());
    }

    @Test
    public void testAddCommentValid() {
        SalesItem item = new SalesItem("Phone", 2500000);
        assertTrue(item.addComment("Aldric", "Mantap", 5));
        assertTrue(item.addComment("Bo", "Bagus", 4));
        assertEquals(2, item.getNumberOfComments());
    }

    @Test
    public void testAddCommentInvalidRating() {
        SalesItem item = new SalesItem("Mouse", 150000);
        assertFalse(item.addComment("A", "Nope", -1));
        assertFalse(item.addComment("B", "Nope", 6));
        assertEquals(0, item.getNumberOfComments());
    }

    @Test
    public void testUpvoteDownvoteAndFindMostHelpful() {
        SalesItem item = new SalesItem("Keyboard", 300000);
        item.addComment("Aldric", "Nice feel", 5);
        item.addComment("Bo", "Cukup oke", 4);
        item.addComment("Chen", "Biasa saja", 3);

        item.upvoteComment(1);
        item.upvoteComment(1);
        item.downvoteComment(0);
        item.downvoteComment(2);
        item.downvoteComment(2);

        Comment mostHelpful = item.findMostHelpfulComment();
        assertEquals("Bo", mostHelpful.getAuthor());
    }

    @Test
    public void testShowInfo() {
        SalesItem item = new SalesItem("Headphones", 2000);
        item.addComment("Aldric", "Excellent sound quality!", 5);
        item.addComment("Bo", "Comfortable to wear.", 4);
        item.showInfo();
    }
}

Proof:

Done.