Test: addStudentTest Test added

src/test/java/org/example/AdministrationTest.java

@@ -119,4 +119,20 @@ class AdministrationTest {
         assertEquals("A2002", result.getId(), "The ID should match the one searched for.");
     }
 
+    @Test
+    void addStudentTest() {
+        Administration administration = new Administration();
+        Student student = new Student("Alice", "S1001", "Student");
+
+        // Initially, no student should be found
+        assertNull(administration.findStudentById("S1001"));
+
+        // Add the student
+        administration.addStudents(student);
+
+        // Now, the student should be found
+        assertNotNull(administration.findStudentById("S1001"));
+        assertEquals("Alice", administration.findStudentById("S1001").getName());
+    }
+
 }