chore: add test for loggable

apps/server/src/modules/demo/loggable/demo-school-create.loggable.spec.ts

@@ -0,0 +1,28 @@
+import { CrudOperation } from '@shared/types';
+import { DemoSchoolCreateLoggable } from './demo-school-create.loggable';
+
+describe(DemoSchoolCreateLoggable.name, () => {
+	describe('getLogMessage', () => {
+		const setup = () => {
+			const userId = 'fakeId';
+
+			const loggable = new DemoSchoolCreateLoggable(userId);
+
+			return { userId, loggable };
+		};
+
+		it('should log the correct message', () => {
+			const { loggable, userId } = setup();
+
+			const result = loggable.getLogMessage();
+
+			expect(result).toEqual({
+				message: expect.any(String),
+				data: {
+					operation: CrudOperation.CREATE,
+					userId,
+				},
+			});
+		});
+	});
+});