feat: adds Library class and corresponding tests (#260)

* feat - finished test for lesson 10 added answers in terminal

* feat: Add Book, Patron, & Library, class and corresponding tests

* fix: added Library file

* chore: removes misplaced quiz file.

---------

Co-authored-by: Anthony D. Mays <anthonydmays@users.noreply.github.com>

lesson_09/oop/oop_app/src/main/java/com/codedifferently/lesson9/kevinmason/Book.java

@@ -0,0 +1,41 @@
+package com.codedifferently.lesson9.kevinmason;
+
+public class Book {
+  private String title;
+  private String isbn;
+  private String author;
+  private int numberOfPages;
+  private boolean checkedOut;
+
+  public Book(String title, String isbn, String author, int numberOfPages) {
+    this.title = title;
+    this.isbn = isbn;
+    this.author = author;
+    this.numberOfPages = numberOfPages;
+    this.checkedOut = false;
+  }
+
+  public String getTitle() {
+    return title;
+  }
+
+  public String getIsbn() {
+    return isbn;
+  }
+
+  public String getAuthor() {
+    return author;
+  }
+
+  public int getNumberOfPages() {
+    return numberOfPages;
+  }
+
+  public boolean isCheckedOut() {
+    return checkedOut;
+  }
+
+  public void setCheckedOut(boolean checkedOut) {
+    this.checkedOut = checkedOut;
+  }
+}

lesson_09/oop/oop_app/src/main/java/com/codedifferently/lesson9/kevinmason/Library.java

@@ -0,0 +1,42 @@
+package com.codedifferently.lesson9.kevinmason;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Library {
+  private List<Book> books;
+  private List<Patron> patrons;
+
+  public Library() {
+    this.books = new ArrayList<>();
+    this.patrons = new ArrayList<>();
+  }
+
+  public void addBook(Book book) {
+    books.add(book);
+  }
+
+  public void removeBook(Book book) {
+    books.remove(book);
+  }
+
+  public void registerPatron(Patron patron) {
+    patrons.add(patron);
+  }
+
+  public void checkOutBook(Book book, Patron patron) {
+    if (!book.isCheckedOut()) {
+      book.setCheckedOut(true);
+      patron.addCheckedOutBook(book);
+    }
+  }
+
+  public void returnBook(Book book, Patron patron) {
+    book.setCheckedOut(false);
+    patron.removeCheckedOutBook(book);
+  }
+
+  public List<Book> getBooks() {
+    return books;
+  }
+}

lesson_09/oop/oop_app/src/main/java/com/codedifferently/lesson9/kevinmason/Patron.java

@@ -0,0 +1,30 @@
+package com.codedifferently.lesson9.kevinmason;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Patron {
+  private String name;
+  private List<Book> checkedOutBooks;
+
+  public Patron(String name) {
+    this.name = name;
+    this.checkedOutBooks = new ArrayList<>();
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public List<Book> getCheckedOutBooks() {
+    return checkedOutBooks;
+  }
+
+  public void addCheckedOutBook(Book book) {
+    checkedOutBooks.add(book);
+  }
+
+  public void removeCheckedOutBook(Book book) {
+    checkedOutBooks.remove(book);
+  }
+}

lesson_09/oop/oop_app/src/test/java/com/codedifferently/lesson9/kevinmason/BookTest.java

@@ -0,0 +1,17 @@
+package com.codedifferently.lesson9.kevinmason;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+public class BookTest {
+
+  @Test
+  public void testCheckOut() {
+    Book book = new Book("Title", "ISBN123", "Author", 200);
+    assertFalse(book.isCheckedOut());
+
+    book.setCheckedOut(true);
+    assertTrue(book.isCheckedOut());
+  }
+}

lesson_09/oop/oop_app/src/test/java/com/codedifferently/lesson9/kevinmason/LibraryTest.java

@@ -0,0 +1,29 @@
+package com.codedifferently.lesson9.kevinmason;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+public class LibraryTest {
+
+  @Test
+  public void testAddBook() {
+    // Create a library
+    Library library = new Library();
+
+    // Create a book
+    Book book = new Book("Test Book", "ISBN123", "Test Author", 200);
+
+    // Add the book to the library
+    library.addBook(book);
+
+    // Retrieve the list of books from the library
+    List<Book> books = library.getBooks();
+
+    // Verify that the book was added to the library
+    assertTrue(books.contains(book));
+  }
+
+  // You can add more test methods for other functionalities here...
+}

lesson_09/oop/oop_app/src/test/java/com/codedifferently/lesson9/kevinmason/PatronTest.java

@@ -0,0 +1,28 @@
+package com.codedifferently.lesson9.kevinmason;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertTrue; // Import statically assertTrue method
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+public class PatronTest {
+
+  @Test
+  public void testAddCheckedOutBook() {
+    // Create a patron
+    Patron patron = new Patron("John Doe");
+
+    // Create a book
+    Book book = new Book("Test Book", "ISBN123", "Test Author", 200);
+
+    // Add the book to the patron's checked out books
+    patron.addCheckedOutBook(book);
+
+    // Retrieve the list of checked out books
+    List<Book> checkedOutBooks = patron.getCheckedOutBooks();
+
+    // Verify that the book was added to the list of checked out books
+    assertTrue(checkedOutBooks.contains(book));
+  }
+}