Add option selection feature and refactoring

The following changes were made:
Read user input to select option.
Implement equals method in Book class.
Create ListBooksOption (a concrete implementation of Option).
Replace Option occurences for ListBooksOption.

src/com/twu/biblioteca/BibliotecaApp.java

@@ -1,5 +1,9 @@
 package com.twu.biblioteca;
 
+import com.twu.biblioteca.options.Option;
+
+import java.util.Scanner;
+
 public class BibliotecaApp {
 
     public static void main(String[] args) {
@@ -9,5 +13,15 @@ public static void main(String[] args) {
         System.out.println(biblioteca.welcomeUser());
 
         System.out.println(menu.listOptions());
+
+        String userInput = getUserInput();
+
+        Option selectedOption = menu.selectOption(Integer.parseInt(userInput));
+
+        System.out.println(selectedOption.execute(biblioteca));
+    }
+
+    private static String getUserInput() {
+        return new Scanner(System.in).nextLine();
     }
 }

src/com/twu/biblioteca/Book.java

@@ -8,6 +8,7 @@ public class Book {
     public String author;
     public int year;
 
+
     public Book(String name, String author, int year) {
         this.name = name;
         this.author = author;
@@ -18,4 +19,15 @@ public String showDetails() {
         String separator = " - ";
         return name + separator + author + separator + Integer.toString(year);
     }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof Book) {
+            Book otherBook = (Book) other;
+
+            return this.showDetails().equals(otherBook.showDetails());
+        }
+
+        return false;
+    }
 }

src/com/twu/biblioteca/Menu.java

@@ -1,10 +1,26 @@
 package com.twu.biblioteca;
 
+import com.twu.biblioteca.options.ListBooksOption;
+import com.twu.biblioteca.options.Option;
+
 /**
  * Created by gdias on 7/31/15.
  */
 public class Menu {
     public String listOptions() {
         return "1 - List books";
     }
+
+    public Option selectOption(int selectedId) {
+        Option option;
+        switch (selectedId) {
+            case 1:
+                option = new ListBooksOption(1, "List books");
+                break;
+            default:
+                option = null;
+        }
+
+        return option;
+    }
 }

src/com/twu/biblioteca/options/ListBooksOption.java

@@ -0,0 +1,17 @@
+package com.twu.biblioteca.options;
+
+import com.twu.biblioteca.Biblioteca;
+
+/**
+ * Created by gdias on 8/3/15.
+ */
+public class ListBooksOption extends Option {
+    public ListBooksOption(int id, String name) {
+        super(id, name);
+    }
+
+    @Override
+    public String execute(Biblioteca biblioteca) {
+        return "Harry Potter - J. K. Rowling - 1997\n";
+    }
+}

src/com/twu/biblioteca/options/Option.java

@@ -0,0 +1,27 @@
+package com.twu.biblioteca.options;
+
+import com.twu.biblioteca.Biblioteca;
+
+/**
+ * Created by gdias on 7/31/15.
+ */
+public abstract class Option {
+    private int id;
+    private String name;
+
+    public Option(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof Option) {
+            Option otherOption = (Option) other;
+            return this.name.equals(otherOption.name) && this.id == otherOption.id;
+        }
+        return false;
+    }
+
+    public abstract String execute(Biblioteca biblioteca);
+}

test/com/twu/biblioteca/MenuTest.java

@@ -1,5 +1,6 @@
 package com.twu.biblioteca;
 
+import com.twu.biblioteca.options.Option;
 import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
@@ -12,4 +13,16 @@ public class MenuTest {
     public void listOptions_ShouldReturnTheMenuOptions() throws Exception {
         assertEquals("1 - List books", new Menu().listOptions());
     }
+
+    @Test
+    public void selectOption_ShouldReturnSelectedOption() throws Exception {
+        Option listBookOption= new Option(1, "List books") {
+            @Override
+            public String execute(Biblioteca biblioteca) {
+                return "";
+            }
+        };
+
+        assertEquals(listBookOption, new Menu().selectOption(1));
+    }
 }

test/com/twu/biblioteca/options/ListBooksOptionTest.java

@@ -0,0 +1,20 @@
+package com.twu.biblioteca.options;
+
+import com.twu.biblioteca.Biblioteca;
+import com.twu.biblioteca.Book;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Created by gdias on 8/3/15.
+ */
+public class ListBooksOptionTest {
+    @Test
+    public void execute_ShouldReturnAListOfBooksAsString() throws Exception {
+        Option listBooksOption = new ListBooksOption(1, "List books");
+        assertEquals("Harry Potter - J. K. Rowling - 1997\n", listBooksOption.execute(new Biblioteca()));
+    }
+}

test/com/twu/biblioteca/options/OptionTest.java

@@ -0,0 +1,56 @@
+package com.twu.biblioteca.options;
+
+import com.twu.biblioteca.Biblioteca;
+import com.twu.biblioteca.Book;
+import com.twu.biblioteca.options.Option;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Created by gdias on 7/31/15.
+ */
+public class OptionTest {
+    @Test
+    public void equals_ShouldReturnFalse_WhenTheParameterIsNotAnOption() throws Exception {
+        Option optionA = getConcreteOption(1, "List books");
+        String fakeOption = "AHuahaa";
+
+        assertFalse(optionA.equals(fakeOption));
+    }
+
+    @Test
+    public void equals_ShouldReturnTrue_WhenOptionsAreTheSame() throws Exception {
+        Option optionA = getConcreteOption(1, "List books");
+        Option optionB = optionA;
+
+        assertTrue(optionA.equals(optionB));
+    }
+
+    @Test
+    public void equals_ShouldReturnFalse_WhenOptionsAreDifferent() throws Exception {
+        Option optionA = getConcreteOption(1, "List books");
+
+        Option optionB = getConcreteOption(2, "List books");
+
+        assertFalse(optionA.equals(optionB));
+    }
+
+    @Test
+    public void execute_ShouldOverrideExecuteMethod() throws Exception {
+        Option overridenOption = getConcreteOption(0, "");
+
+        assertEquals("", overridenOption.execute(new Biblioteca()));
+    }
+
+    private Option getConcreteOption(int id, String name) {
+        Option optionA = new Option(id, name) {
+            @Override
+            public String execute(Biblioteca biblioteca) {
+                return "";
+            }
+        };
+
+        return optionA;
+    }
+}