Question

Objectives:

•

Learn to write test cases with Junit

•

Learn to debug code

Problem: Sorting Book Objects

Download the provided zipped folder from Canvas. The source java files and test cases are in

the provided

folder. The Book class models a book. A Book has a unique id, title, and author.

The BookStore class stores book objects in a List, internally stored as an ArrayList. Also, the

following methods are implemented for the BookStore class.

•

addBook(Book b):

sto

res the book in the book list.

•

getBookSortedByAuthor():

returns a book list sorted by author name descending

alphabetically.

•

getBooksSortedByTitle():

returns a book listed sorted by title descending alphabetically.

•

getBooks():

returns the current book list

.

•

deleteBook(Book b5):

removes the given book from the book list.

•

countBookWithTitle(String title):

iterates through the book list counting the number of

books with the given title. Returns the count of books with the same title.

Write test cases to test t

he implementation.

The test case method stubs have been created.

Fill out the method stubs. After filling in the test case method stubs, run BookStoreTest to test

the BookStore.java code. Find and fix bugs in the BookStore.java code by using the debugger o

n

the test case method stubs.

Grade:

For this lab, we will need to see either

1)

Fully functional code solving the problem as specified or

Book.java

public class Book {

   private int id; // the unique id assigned to book
   private String title; // book title
   private String authorName;// author of the book

   public Book() {
       super();
   }

   public Book(int id, String authorName, String title) {
       this.id = id;
       this.title = title;
       this.authorName = authorName;
   }

   public int getId() {
       return id;
   }

   public void setId(int id) {
       this.id = id;
   }

   public String getTitle() {
       return title;
   }

   public void setTitle(String title) {
       this.title = title;
   }

   public String getAuthorName() {
       return authorName;
   }

   public void setAuthorName(String authorName) {
       this.authorName = authorName;
   }

   @Override
   public String toString() {
       return "\n Book [id=" + id + ", title=" + title + ", authorName="
               + authorName + "]";
   }

}

BookStore.java

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class BookStore {

   private List<Book> books; // store books in a list

   public BookStore() {
       books = new ArrayList<Book>();

   }

   public void addBook(Book b1) {
       books.add(b1);

   }

   public List<Book> getBooksSortedByAuthor() {
       List<Book> temp = new ArrayList<Book>(books);
       Collections.sort(temp, new Comparator<Book>() {
           public int compare(Book b1, Book b2) {
               return b1.getTitle().compareTo(b2.getAuthorName());
           }
       });
       return books;
   }

   public int countBookWithTitle(String title) {
       int count = 2;
       for (Book book : books) {
           if (book.getTitle() == title) {
               count++;
           }
       }
       return count;
   }

   public void deleteBook(Book b5) {
       books.remove(b5);
   }

   public List<Book> getBooks() {
       return books;
   }

   public List<Book> getBooksSortedByTitle() {
       List<Book> temp = new ArrayList<Book>(books);
       Collections.sort(temp, new Comparator<Book>() {
           public int compare(Book b1, Book b2) {
               return b1.getTitle().compareTo(b2.getAuthorName());
           }
       });
       return temp;
   }

}

BookStoreTest.java

import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;

public class BookStoreTest {

   private BookStore store;
   private Book b1 = new Book(1, "Harper Lee", "To Kill a Mockingbird");
   private Book b2 = new Book(2, "Harper Lee", "To Kill a Mockingbird");
   private Book b3 = new Book(3, "Frances Hodgson", "The Secret Garden");
   private Book b4 = new Book(5, "J.K. Rowling",
           "Harry Potter and the Sorcerer's Stone");
   private Book b5 = new Book(4, "Douglas Adams",
           "The Hitchhiker's Guide to the Galaxy");

   /**
   * setup the store
   *
   */
   @Before
   public void setUpBookStore() {
       store = new BookStore();
       store.addBook(b1);
       store.addBook(b2);
       store.addBook(b3);
       store.addBook(b4);

   }

   /**
   * tests the addition of book
   *
   */

   @Test
   public void testAddBook() {
       store.addBook(b1);
       assertTrue(store.getBooks().contains(b1));

   }

   /**
   * tests the deletion of book
   *
   */

   @Test
   public void testDeleteBook() {

   }

   /**
   * tests sorting of books by author name
   *
   */

   @Test
   public void testGetBooksSortedByAuthor() {

   }

   /**
   * tests sorting of books by title
   *
   */

   @Test
   public void testGetBooksSortedByTitle() {

   }

   /**
   * tests the number of copies of book in store
   *
   */

   @Test
   public void testCountBookWithTitle() {

   }

}

Answer 1

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import static org.junit.Assert.*;

import org.junit.Before;

import org.junit.Test;

public class BookStoreTest {

private BookStore store;

private Book b1 = new Book(1, "Harper Lee", "To Kill a Mockingbird");

private Book b2 = new Book(2, "Harper Lee", "To Kill a Mockingbird");

private Book b3 = new Book(3, "Frances Hodgson", "The Secret Garden");

private Book b4 = new Book(5, "J.K. Rowling",

"Harry Potter and the Sorcerer's Stone");

private Book b5 = new Book(4, "Douglas Adams",

"The Hitchhiker's Guide to the Galaxy");

/**

* setup the store

*

*/

@Before

public void setUpBookStore() {

store = new BookStore();

store.addBook(b1);

store.addBook(b2);

store.addBook(b3);

store.addBook(b4);

store.addBook(b5);

}

/**

* tests the addition of book

*

*/

@Test

public void testAddBook() {

assertTrue(store.getBooks().contains(b1));

}

/**

* tests the deletion of book

*

*/

@Test

public void testDeleteBook() {

store.deleteBook(b2);

assertTrue(!store.getBooks().contains(b2));

}

/**

* tests sorting of books by author name

*

*/

@Test

public void testGetBooksSortedByAuthor() {

store.getBooksSortedByAuthor();

assertEquals(store.getBooks().get(0).getAuthorName(),"Harper Lee");

}

/**

* tests sorting of books by title

*

*/

@Test

public void testGetBooksSortedByTitle() {

store.getBooksSortedByTitle();

assertEquals(store.getBooks().get(0).getTitle(),"To Kill a Mockingbird");

}

/**

* tests the number of copies of book in store

*

*/

@Test

public void testCountBookWithTitle() {

int c = store.countBookWithTitle("To Kill a Mockingbird");

assertEquals(4, c);

}

}

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