Error while run unit test with moleculer-cli generated project

[JasLin]

i am trying to make an es7 template project with moleculer-cli generated project .now it can run with npm run dev without error,
but it can't pass npm test , with errors:

  ● Test 'products' service › Test hooks › encountered a declaration exception

    ServiceSchemaError: Service name can't be empty! Maybe it is not a valid Service schema. Maybe is it not a service schema?

      4 | const DbMixin = require("../mixins/db.mixin");
      5 | 
    > 6 | @Service({
        | ^
      7 |       name: 'products',
      8 |       // constructOverride: false,
      9 |       // skipHandler: true,

      at Object.parseServiceSchema (../node_modules/moleculer/src/service.js:92:10)
      at new Service (../node_modules/moleculer/src/service.js:63:9)
      at new ProductsService (products.service.js:6:1)
      at new <anonymous> (../node_modules/moleculer-decorators/dist/index.js:128:9)
      at ServiceBroker.createService (../node_modules/moleculer/src/service-broker.js:801:14)
      at Suite.<anonymous> (../test/unit/services/products.spec.js:149:10)
      at Suite.<anonymous> (../test/unit/services/products.spec.js:146:2)
      at Object.<anonymous> (../test/unit/services/products.spec.js:9:1)

the error was begin from :

products.spec.js

...
describe("Test hooks", () => {
		const broker = new ServiceBroker({ logger: false });
		const createActionFn = jest.fn();
		broker.createService(TestService, { // <- error start from here, while it try to merge mock action to TestService Schema
			actions: {
				create: {
					handler: createActionFn
				}
			}
		});
...
}

and createService run into :

...
createService(schema, schemaMods) {
		let service;
		schema = this.normalizeSchemaConstructor(schema);
		if (Object.prototype.isPrototypeOf.call(this.ServiceFactory, schema)) {
			service = new schema(this, schemaMods); // <- run into here to new Decoratored Schema, but it with schemaMods, this is why it throws error , beacause `new service(broker, schemaMods)` will call parseServiceSchema, it will check name of schemaMods , but shemaMods don't have name properties. see bellow code . 
		} else {
			let s = schema;
			
			if (schemaMods)
				s = this.ServiceFactory.mergeSchemas(schema, schemaMods);
			console.log('s', s);
			service = new this.ServiceFactory(this, s);
		}
}
...

i notice that , moleculer-decorators return Service as :

return class extends parentService.constructor {
      constructor(broker, schema) { //  <- new schema(this, schemaMods) 
        super(broker, schema); // <- here, it will call `Moleculer.Service`, with params broker and schemaMods  
        this.parseServiceSchema(base);
      }
    };
  };

ref

class Service {

...
	constructor(broker, schema) {
		if (!isObject(broker))
			throw new ServiceSchemaError("Must set a ServiceBroker instance!");

		this.broker = broker;

		if (broker)
			this.Promise = broker.Promise;

		if (schema)
			this.parseServiceSchema(schema); // <- ran into here 
	}

	/**
	 * Parse Service schema & register as local service
	 *
	 * @param {Object} schema of Service
	 */
	parseServiceSchema(schema) {
		if (!isObject(schema))
			throw new ServiceSchemaError("The service schema can't be null. Maybe is it not a service schema?");

		this.originalSchema = _.cloneDeep(schema);

		if (schema.mixins) {
			schema = Service.applyMixins(schema);
		}

		if (isFunction(schema.merged)) {
			schema.merged.call(this, schema);
		} else if (Array.isArray(schema.merged)) {
			schema.merged.forEach(fn => fn.call(this, schema));
		}

		this.broker.callMiddlewareHookSync("serviceCreating", [this, schema]);

		if (!schema.name) { // <- error throws here
			
			console.error("Service name can't be empty! Maybe it is not a valid Service schema. Maybe is it not a service schema?", { schema });
			throw new ServiceSchemaError("Service name can't be empty! Maybe it is not a valid Service schema. Maybe is it not a service schema?", { schema });
		}
         ...