remotasks_library_problem.java

remotasks_library_problem.java

// MainTest.java
package tests;

import src.Main;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.BeforeAll;
public class MainTest {
    @BeforeAll
    static void setUp() {
        // Sample Users
        Main.users.put("admin", new Main.User("admin", "admin"));
        Main.users.put("user1", new Main.User("user1", "user"));
        Main.users.put("user2", new Main.User("user2", "user"));

        // Sample Books
        Main.books.put("Book1", new Main.Book("Book1"));
        Main.books.put("Book2", new Main.Book("Book2"));
        Main.books.put("Book3", new Main.Book("Book3"));
    }
    @Test
    void testLoginSuccess() {
        assertEquals("Login successful. Welcome, admin!", Main.login("admin", "admin"));
    }

    @Test
    void testLoginFailure() {
        assertEquals("Invalid username or password.", Main.login("nonexistentuser", "password"));
    }

    @Test
    void testReserveBookSuccess() {
        assertEquals("user1 reserved Book1", Main.reserveBook("Book1", "user1"));
    }

    @Test
    void testReserveBookFailure() {
        assertEquals("user1 reserved Book2", Main.reserveBook("Book2", "user1"));
    }

    @Test
    void testGenerateReport() {
        assertEquals("Library Report:\nBook3 - Reserved: false, Loaned: false\nBook1 - Reserved: false, Loaned: false\nBook2 - Reserved: false, Loaned: false\n", Main.generateReport());
    }
}


// Main.java
package src;

import java.util.*;

public class Main {
    // User class is now static to be accessed in the MainTest class
    public static class User {
        String username;
        String role;

        public User(String username, String role) {
            this.username = username;
            this.role = role;
        }
    }

    // Book class is now static to be accessed in the MainTest class
    public static class Book {
        String title;
        boolean isReserved;
        boolean isLoaned;

        public Book(String title) {
            this.title = title;
            this.isReserved = false;
            this.isLoaned = false;
        }
    }

    public static Map<String, Book> books = new HashMap<>();
    public static Map<String, User> users = new HashMap<>();

    public static void main(String[] args) {
        // Sample Users
        users.put("admin", new User("admin", "admin"));
        users.put("user1", new User("user1", "user"));
        users.put("user2", new User("user2", "user"));

        // Sample Books
        books.put("Book1", new Book("Book1"));
        books.put("Book2", new Book("Book2"));
        books.put("Book3", new Book("Book3"));

        // Simulate user actions
        System.out.println(login("admin", "admin")); // Log in as admin
        System.out.println(listBooks()); // List all books

        System.out.println(reserveBook("Book1", "user1")); // User1 reserves Book1
        System.out.println(loanBook("Book1", "user1")); // User1 loans Book1
        System.out.println(returnBook("Book1")); // User1 returns Book1

        System.out.println(generateReport()); // Generate a simple report
    }

    // Methods remain the same as before...

    public static String login(String username, String password) {
        User user = users.get(username);
        if (user != null) {
            return "Login successful. Welcome, " + user.username + "!";
        } else {
            return "Invalid username or password.";
        }
    }


    public static String reserveBook(String bookTitle, String username) {
        Book book = books.get(bookTitle);
        if (book != null && !book.isReserved && !book.isLoaned) {
            book.isReserved = true;
            return username + " reserved " + bookTitle;
        } else {
            return "Book not available for reservation.";
        }
    }

    public static String loanBook(String bookTitle, String username) {
        Book book = books.get(bookTitle);
        if (book != null && book.isReserved && !book.isLoaned) {
            book.isLoaned = true;
            book.isReserved = false;
            return username + " loaned " + bookTitle;
        } else {
            return "Book not available for loan.";
        }
    }

    public static String returnBook(String bookTitle) {
        Book book = books.get(bookTitle);
        if (book != null && book.isLoaned) {
            book.isLoaned = false;
            return bookTitle + " returned.";
        } else {
            return "Invalid book return.";
        }
    }

    public static String generateReport() {
        StringBuilder result = new StringBuilder("Library Report:\n");
        for (Map.Entry<String, Book> entry : books.entrySet()) {
            result.append(entry.getKey())
                  .append(" - Reserved: ")
                  .append(entry.getValue().isReserved)
                  .append(", Loaned: ")
                  .append(entry.getValue().isLoaned)
                  .append("\n");
        }
        return result.toString();
    }

    // Method to return the list of books as a string
    public static String listBooks() {
        StringBuilder result = new StringBuilder("Available Books:\n");
        for (Map.Entry<String, Book> entry : books.entrySet()) {
            result.append(entry.getKey())
                  .append(" - Reserved: ")
                  .append(entry.getValue().isReserved)
                  .append(", Loaned: ")
                  .append(entry.getValue().isLoaned)
                  .append("\n");
        }
        result.append("\n");
        return result.toString();
    }

}