Derwinbell completed tdd-lab-design-your-own-object

src/main/java/object/example/derwinbell/Library.java

@@ -0,0 +1,49 @@
+package object.example.derwinbell;
+
+public class Library {
+    private String title;
+    private String author;
+    private int pages;
+    private boolean checkedOut;
+    private int dueDays;
+
+    public Library(String title, String author, int pages, boolean checkedOut, int dueDays) {
+        if (pages <= 0) {
+            throw new IllegalArgumentException("Pages must be greater than 0");
+        }
+        this.title = title;
+        this.author = author;
+        this.pages = pages;
+        this.checkedOut = checkedOut;
+        this.dueDays = dueDays;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public int getPages() {
+        return pages;
+    }
+
+    public boolean isCheckedOut() {
+        return checkedOut;
+    }
+
+    public int getDueDays() {
+        return dueDays;
+    }
+    public void checkOut(){
+        checkedOut = true;
+    }
+
+    public void returnBook(){
+        checkedOut = false;
+    }
+
+
+}

src/test/java/object/example/derwinbell/LibraryTest.java

@@ -0,0 +1,42 @@
+package object.example.derwinbell;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class LibraryTest {
+    @Test
+    void constructorWorks(){
+        Library book = new Library("Java", "Smith", 300, false, 14);
+
+        assertEquals("Java", book.getTitle());
+        assertEquals("Smith", book.getAuthor());
+    }
+
+
+    @Test
+    void checkOutWorks(){
+
+        Library book = new Library("Java", "Smith", 300, false, 14);
+
+        book.checkOut();
+
+        assertTrue(book.isCheckedOut());
+    }
+
+    @Test
+    void invalidPagesThrows(){
+
+        assertThrows(IllegalArgumentException.class, () -> {
+            new Library("Java", "Smith", -1, false, 14);
+        });
+    }
+
+    @Test
+    void findPagesAndDueDates(){
+        Library book = new Library("Java", "Smith", 300, false, 14);
+
+        assertEquals(14, book.getDueDays());
+        assertEquals(300, book.getPages());
+    }
+
+}