✅ Reussite du test de reduction des stock avec l'exception possible

src/test/java/fr/iut_fbleau/but3/dev62/mylibrary/book/entity/BookTest.java

@@ -1,7 +1,7 @@
 package fr.iut_fbleau.but3.dev62.mylibrary.book.entity;
 
-import fr.iut_fbleau.but3.dev62.mylibrary.book.BookDTO;
-import fr.iut_fbleau.but3.dev62.mylibrary.book.converter.BookConverter;
+
+import fr.iut_fbleau.but3.dev62.mylibrary.book.exception.IllegalBookStockException;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -9,7 +9,8 @@ import org.junit.jupiter.api.Test;
 import java.time.LocalDate;
 import java.util.ArrayList;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class BookTest {
 
@@ -84,5 +85,66 @@ public class BookTest {
 
             assertEquals(copyExpected, book.getStock());
         }
+
+        @Test
+        @DisplayName("removeLoyaltyPoints should correctly decrement loyalty points")
+        void testRemoveCopy() throws IllegalBookStockException {
+            Book book =Book.builder()
+                    .stock(5)
+                    .build();
+            Integer copyToRemove = 2;
+            Integer copyExpected = 3;
+
+            book.removeStock(copyToRemove);
+
+            assertEquals(copyExpected, book.getStock());
+        }
+
+        @Test
+        @DisplayName("removeLoyaltyPoints should correctly decrement loyalty points")
+        void testRemoveZeroToCopy() throws IllegalBookStockException {
+            Book book =Book.builder()
+                    .stock(5)
+                    .build();
+            Integer copyToRemove = 0;
+            Integer copyExpected = 5;
+
+            book.removeStock(copyToRemove);
+
+            assertEquals(copyExpected, book.getStock());
+        }
+
+        @Test
+        @DisplayName("removeLoyaltyPoints should correctly decrement loyalty points")
+        void testRemoveAllToCopy() throws IllegalBookStockException {
+            Book book =Book.builder()
+                    .stock(5)
+                    .build();
+            Integer copyToRemove = 5;
+            Integer copyExpected = 0;
+
+            book.removeStock(copyToRemove);
+
+            assertEquals(copyExpected, book.getStock());
+        }
+
+        @Test
+        @DisplayName("removeSTock should throw exception when trying to remove more copy than available")
+        void testRemoveTooManyCopy() {
+            Book book = Book.builder()
+                    .stock(50)
+                    .build();
+            int copyToRemove = 75;
+
+            IllegalBookStockException exception = assertThrows(
+                    IllegalBookStockException.class,
+                    () -> book.removeStock(copyToRemove)
+            );
+
+            assertEquals(50, book.getStock());
+
+            assertTrue(exception.getMessage().contains(String.valueOf(copyToRemove)));
+            assertTrue(exception.getMessage().contains(String.valueOf(book.getStock())));
+        }
     }
 }