Unit Testing

 

Nama           : Hafidz Panji Ashari
NRP             : 5025231278
Kelas            : PBO-A


Kelas PhoneProduct

import java.util.ArrayList;
import java.util.Comparator;

public class PhoneProduct {
    private String brand; // Nama merk
    private String model; // Model handphone
    private double price; // Harga dalam USD
    private ArrayList<Review> reviews; // Daftar ulasan pengguna

    // Constructor
    public PhoneProduct(String brand, String model, double price) {
        this.brand = brand;
        this.model = model;
        this.price = price;
        this.reviews = new ArrayList<>();
    }

    // Getters dan Setters
    public String getBrand() {
        return brand;
    }

    public String getModel() {
        return model;
    }

    public double getPrice() {
        return price;
    }

    // Menambahkan ulasan pengguna
    public boolean addReview(String username, String comment, int rating) {
        if (rating < 1 || rating > 5) {
            return false; // Rating harus valid
        }
        if (findReviewByUser(username) != null) {
            return false; // Tidak boleh ada ulasan ganda dari user yang sama
        }
        reviews.add(new Review(username, comment, rating));
        return true;
    }

    // Menghapus ulasan berdasarkan indeks
    public void removeReview(int index) {
        if (index >= 0 && index < reviews.size()) {
            reviews.remove(index);
        }
    }

    // Menampilkan informasi handphone dan ulasan
    public void displayInfo() {
        System.out.println("Brand: " + brand);
        System.out.println("Model: " + model);
        System.out.println("Price: $" + price);
        System.out.println("User Reviews:");
        for (Review review : reviews) {
            System.out.println("------------------------------");
            System.out.println(review.getDetails());
        }
    }

    // Menghitung rata-rata rating
    public double getAverageRating() {
        if (reviews.isEmpty()) {
            return 0.0;
        }
        double totalRating = 0;
        for (Review review : reviews) {
            totalRating += review.getRating();
        }
        return totalRating / reviews.size();
    }

    // Menemukan ulasan terbaik berdasarkan rating
    public Review getBestReview() {
        return reviews.stream()
                      .max(Comparator.comparingInt(Review::getRating))
                      .orElse(null);
    }

    // Helper untuk mencari ulasan berdasarkan username
    private Review findReviewByUser(String username) {
        for (Review review : reviews) {
            if (review.getUsername().equalsIgnoreCase(username)) {
                return review;
            }
        }
        return null;
    }
}


Kelas Review


public class Review {
    private String username; // Nama pengguna
    private String comment;  // Ulasan
    private int rating;      // Rating (1-5)

    public Review(String username, String comment, int rating) {
        this.username = username;
        this.comment = comment;
        this.rating = rating;
    }

    public String getUsername() {
        return username;
    }

    public String getComment() {
        return comment;
    }

    public int getRating() {
        return rating;
    }

    // Detail ulasan
    public String getDetails() {
        return "User: " + username + "\nRating: " + rating + "/5\nComment: " + comment;
    }
}


Unit Testing dengan JUnit

Tambahkan Dependency JUnit

<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter</artifactId>
    <version>5.9.3</version>
    <scope>test</scope>
</dependency>


Kelas Test untuk PhoneProduct

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

public class PhoneProductTest {

    @Test
    public void testAddReview() {
        PhoneProduct phone = new PhoneProduct("Samsung", "Galaxy S23", 999.99);
        assertTrue(phone.addReview("user1", "Great phone!", 5));
        assertFalse(phone.addReview("user1", "Duplicate review", 4));
        assertFalse(phone.addReview("user2", "Invalid rating", 6));  
    }

    @Test
    public void testGetAverageRating() {
        PhoneProduct phone = new PhoneProduct("Apple", "iPhone 14", 1099.99);
        phone.addReview("user1", "Amazing phone", 5);
        phone.addReview("user2", "Good but expensive", 4);

        assertEquals(4.5, phone.getAverageRating());
    }

    @Test
    public void testGetBestReview() {
        PhoneProduct phone = new PhoneProduct("Xiaomi", "Redmi Note 12", 299.99);
        phone.addReview("user1", "Great value", 4);
        phone.addReview("user2", "Perfect phone for the price", 5);

        Review bestReview = phone.getBestReview();
        assertNotNull(bestReview);
        assertEquals("user2", bestReview.getUsername());
        assertEquals(5, bestReview.getRating());
    }
}

















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