Add book details feature

src/com/twu/biblioteca/Biblioteca.java

@@ -28,7 +28,7 @@ public List<Book> listBooks() {
     }
 
     private void initialiazeBookList() {
-        Book book = new Book("Harry Potter");
+        Book book = new Book("Harry Potter", "J. K. Rowling", 1997);
         books.add(book);
     }
 }

src/com/twu/biblioteca/BibliotecaApp.java

@@ -7,7 +7,7 @@ public static void main(String[] args) {
         System.out.println(biblioteca.welcomeUser());
 
         for(Book book : biblioteca.listBooks()) {
-            System.out.println(book.name + "\n");
+            System.out.println(book.showDetails() + "\n");
         }
     }
 }

src/com/twu/biblioteca/Book.java

@@ -5,8 +5,17 @@
  */
 public class Book {
     public String name;
+    public String author;
+    public int year;
 
-    public Book(String name) {
+    public Book(String name, String author, int year) {
         this.name = name;
+        this.author = author;
+        this.year = year;
+    }
+
+    public String showDetails() {
+        String separator = " - ";
+        return name + separator + author + separator + Integer.toString(year);
     }
 }

test/com/twu/biblioteca/BibliotecaTest.java

@@ -25,12 +25,13 @@ public void welcomeUser_ShouldReturnGivenMessage() throws Exception {
     @Test
     public void listBooks_ShouldListAllBooks() throws Exception {
         biblioteca = new Biblioteca();
-        Book book = new Book("Harry Potter");
+        String separator = " - ";
+        Book book = new Book("Harry Potter", "J. K. Rowling", 1997);
         List<Book> expected = new ArrayList<Book>();
         expected.add(book);
+        Book expectedBook = expected.get(0);
 
         assertEquals(expected.size(), biblioteca.listBooks().size());
-
-        assertEquals(expected.get(0).name, biblioteca.listBooks().get(0).name);
+        assertEquals(expectedBook.name + separator + expectedBook.author + separator + expectedBook.year , biblioteca.listBooks().get(0).showDetails());
     }
 }

test/com/twu/biblioteca/BookTest.java

@@ -0,0 +1,16 @@
+package com.twu.biblioteca;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Created by gdias on 7/31/15.
+ */
+public class BookTest {
+    @Test
+    public void showDetails_ShouldReturnBookNameAuthorAndYear() throws Exception {
+        String expected = "Harry Potter - J. K. Rowling - 1997";
+        assertEquals(expected, new Book("Harry Potter", "J. K. Rowling", 1997).showDetails());
+    }
+}