feat: adds Lesson 09 classes + test (mekhi) (#246)

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

@@ -0,0 +1,60 @@
+package com.codedifferently.lesson9.library;
+
+import java.util.List;
+
+/** Represents a Marvel comic in the library. */
+public class Book {
+  private String title;
+  private String isbn;
+  private List<String> authors;
+  private int numPages;
+  private boolean checkedOut;
+
+  public Book(String title, String isbn, List<String> authors, int numPages) {
+    this.title = title;
+    this.isbn = isbn;
+    this.authors = authors;
+    this.numPages = numPages;
+    this.checkedOut = false;
+  }
+
+  public String getTitle() {
+    return title;
+  }
+
+  public void setTitle(String title) {
+    this.title = title;
+  }
+
+  public String getIsbn() {
+    return isbn;
+  }
+
+  public void setIsbn(String isbn) {
+    this.isbn = isbn;
+  }
+
+  public List<String> getAuthors() {
+    return authors;
+  }
+
+  public void setAuthors(List<String> authors) {
+    this.authors = authors;
+  }
+
+  public int getNumPages() {
+    return numPages;
+  }
+
+  public void setNumPages(int numPages) {
+    this.numPages = numPages;
+  }
+
+  public boolean isCheckedOut() {
+    return checkedOut;
+  }
+
+  public void setCheckedOut(boolean checkedOut) {
+    this.checkedOut = checkedOut;
+  }
+}

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

@@ -0,0 +1,59 @@
+package com.codedifferently.lesson9.library;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** Represents a library with Marvel comics and patrons. */
+public class Library {
+  private List<Book> marvelComics;
+  private List<Patron> patrons;
+
+  public Library() {
+    this.marvelComics = new ArrayList<>();
+    this.patrons = new ArrayList<>();
+  }
+
+  public void addComic(Book comic) {
+    marvelComics.add(comic);
+  }
+
+  public void removeComic(Book comic) {
+    marvelComics.remove(comic);
+  }
+
+  public void registerPatron(Patron patron) {
+    patrons.add(patron);
+  }
+
+  public void checkOutComic(Book comic, Patron patron) {
+    if (marvelComics.contains(comic) && patrons.contains(patron)) {
+      patron.checkOutBook(comic);
+    } else {
+      System.out.println("Marvel comic or patron not found in the library.");
+    }
+  }
+
+  public void returnComic(Book comic, Patron patron) {
+    if (marvelComics.contains(comic) && patrons.contains(patron)) {
+      patron.returnBook(comic);
+    } else {
+      System.out.println("Marvel comic or patron not found in the library.");
+    }
+  }
+
+  public List<Book> getMarvelComics() {
+    return marvelComics;
+  }
+
+  public void setMarvelComics(List<Book> marvelComics) {
+    this.marvelComics = marvelComics;
+  }
+
+  public List<Patron> getPatrons() {
+    return patrons;
+  }
+
+  public void setPatrons(List<Patron> patrons) {
+    this.patrons = patrons;
+  }
+}

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

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+package com.codedifferently.lesson9.library;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** Represents a patron of the library. */
+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 void setName(String name) {
+    this.name = name;
+  }
+
+  public List<Book> getCheckedOutBooks() {
+    return checkedOutBooks;
+  }
+
+  public void setCheckedOutBooks(List<Book> checkedOutBooks) {
+    this.checkedOutBooks = checkedOutBooks;
+  }
+
+  public void checkOutBook(Book book) {
+    if (!book.isCheckedOut()) {
+      book.setCheckedOut(true);
+      checkedOutBooks.add(book);
+    } else {
+      System.out.println("Marvel comic is already checked out.");
+    }
+  }
+
+  public void returnBook(Book book) {
+    if (checkedOutBooks.contains(book)) {
+      book.setCheckedOut(false);
+      checkedOutBooks.remove(book);
+    } else {
+      System.out.println("Marvel comic is not checked out by this patron.");
+    }
+  }
+}

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

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+package com.codedifferently.lesson9.test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.codedifferently.lesson9.library.Book;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+public class BookTest {
+
+  @Test
+  public void testComicConstructor() {
+    List<String> authors = new ArrayList<>();
+    authors.add("Stan Lee");
+    Book comic = new Book("Spider-Man", "9781302920528", authors, 200);
+    assertEquals("Spider-Man", comic.getTitle());
+    assertEquals("9781302920528", comic.getIsbn());
+    assertEquals(authors, comic.getAuthors());
+    assertEquals(200, comic.getNumPages());
+    assertFalse(comic.isCheckedOut());
+  }
+
+  @Test
+  public void testSetCheckedOut() {
+    Book comic = new Book("Iron Man", "9781302921556", List.of("Stan Lee"), 150);
+    assertFalse(comic.isCheckedOut());
+    comic.setCheckedOut(true);
+    assertTrue(comic.isCheckedOut());
+  }
+}

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

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+package com.codedifferently.lesson9.test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.codedifferently.lesson9.library.Book;
+import com.codedifferently.lesson9.library.Library;
+import com.codedifferently.lesson9.library.Patron;
+import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class LibraryTest {
+  private Library library;
+  private Book comic;
+  private Patron patron;
+
+  @BeforeEach
+  public void setup() {
+    library = new Library();
+    comic = new Book("X-Men", "9781302921785", List.of("Stan Lee"), 250);
+    patron = new Patron("Natasha Romanoff");
+  }
+
+  @Test
+  public void testAddComic() {
+    library.addComic(comic);
+    assertEquals(1, library.getMarvelComics().size());
+    assertTrue(library.getMarvelComics().contains(comic));
+  }
+
+  @Test
+  public void testRemoveComic() {
+    library.addComic(comic);
+    assertEquals(1, library.getMarvelComics().size());
+    library.removeComic(comic);
+    assertEquals(0, library.getMarvelComics().size());
+  }
+
+  @Test
+  public void testRegisterPatron() {
+    library.registerPatron(patron);
+    assertEquals(1, library.getPatrons().size());
+    assertTrue(library.getPatrons().contains(patron));
+  }
+
+  @Test
+  public void testCheckOutComic() {
+    library.addComic(comic);
+    library.registerPatron(patron);
+    library.checkOutComic(comic, patron);
+    assertEquals(1, patron.getCheckedOutBooks().size());
+    assertTrue(patron.getCheckedOutBooks().contains(comic));
+  }
+}

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

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+package com.codedifferently.lesson9.test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.codedifferently.lesson9.library.Book;
+import com.codedifferently.lesson9.library.Patron;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+public class PatronTest {
+
+  @Test
+  public void testPatronConstructor() {
+    Patron patron = new Patron("Peter Parker");
+    assertEquals("Peter Parker", patron.getName());
+    assertEquals(new ArrayList<Book>(), patron.getCheckedOutBooks());
+  }
+
+  @Test
+  public void testCheckOutComic() {
+    Patron patron = new Patron("Tony Stark");
+    Book comic = new Book("Avengers", "9781302921686", List.of("Stan Lee"), 300);
+    patron.checkOutBook(comic);
+    assertEquals(1, patron.getCheckedOutBooks().size());
+  }
+}