diff --git a/src/test/java/com/example/authentication/Sau02f220uServiceTest.java b/src/test/java/com/example/authentication/Sau02f220uServiceTest.java
new file mode 100644
index 0000000..7a60736
--- /dev/null
+++ b/src/test/java/com/example/authentication/Sau02f220uServiceTest.java
@@ -0,0 +1,17 @@
+package com.example.authentication;
+
+import org.junit.jupiter.api.Test;
+import static org.mockito.Mockito.*;
+
+class Sau02f220uServiceTest {
+    @Test
+    void testAuthenticate() {
+        Sau02f220uService service = new Sau02f220uService();
+        Sau02f220uDto dto = new Sau02f220uDto();
+        dto.setUsername("testUser");
+        dto.setPassword("testPass");
+
+        service.authenticate(dto);
+        // Add assertions here
+    }
+}
\ No newline at end of file