Test: findAdminByIdTest Test added

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

@@ -108,6 +108,15 @@ class AdministrationTest {
         assertEquals("Jane Doe", result.getName(), "The name of the found admin should match.");
     }
 
+    @Test
+    void findAdminByIdTest() {
+        Administration administration = new Administration();
+        Admin admin = new Admin("John Doe", "A2002", "Admin");
+        administration.addAdmin(admin);
 
+        Admin result = administration.findAdminById("A2002");
+        assertNotNull(result, "Admin should be found by ID.");
+        assertEquals("A2002", result.getId(), "The ID should match the one searched for.");
+    }
 
 }