pom.xml

@@ -27,7 +27,7 @@
 		<url/>
 	</scm>
 	<properties>
-		<java.version>17</java.version>
+		<java.version>21</java.version>
 	</properties>
 	<dependencies>
 		<dependency>
@@ -80,6 +80,11 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-test</artifactId>

src/test/java/de/zendric/app/xpensely_Server/ExpenseListRepositoryTest.java

@@ -1,13 +1,14 @@
 package de.zendric.app.xpensely_Server;
 
-import java.util.Optional;
-
+import de.zendric.app.xpensely_server.model.ExpenseList;
+import de.zendric.app.xpensely_server.repo.ExpenseListRepository;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 
-import de.zendric.app.xpensely_server.model.ExpenseList;
-import de.zendric.app.xpensely_server.repo.ExpenseListRepository;
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 @DataJpaTest
 class ExpenseListRepositoryTest {
@@ -16,11 +17,31 @@ class ExpenseListRepositoryTest {
     private ExpenseListRepository expenseListRepository;
 
     @Test
-        void testFindExpenseListById() {
-                // Assuming an ExpenseList with id = 1 exists in your test DB.
-                Optional<ExpenseList> optionalExpenseList = expenseListRepository.findById(1L);
+    void saveAndFindById_returnsExpenseList() {
+        ExpenseList list = new ExpenseList();
+        list.setName("Groceries");
+        ExpenseList saved = expenseListRepository.save(list);
 
-                ExpenseList expenseList = optionalExpenseList.get();
-                System.out.println("ExpenseList name: " + expenseList.getName());
+        Optional<ExpenseList> found = expenseListRepository.findById(saved.getId());
+
+        assertTrue(found.isPresent());
+        assertEquals("Groceries", found.get().getName());
+    }
+
+    @Test
+    void findById_nonExistentId_returnsEmpty() {
+        Optional<ExpenseList> found = expenseListRepository.findById(999L);
+        assertTrue(found.isEmpty());
+    }
+
+    @Test
+    void delete_removesFromRepository() {
+        ExpenseList list = new ExpenseList();
+        list.setName("To Delete");
+        ExpenseList saved = expenseListRepository.save(list);
+
+        expenseListRepository.deleteById(saved.getId());
+
+        assertTrue(expenseListRepository.findById(saved.getId()).isEmpty());
     }
 }