Add options.autoUpdateSchema (#63)

Add new option to allow/disallow automatic updating of schema.

Co-authored-by: Shawn McKnight <mck321@gmail.com>

Author: brunonunes

index.d.ts

@@ -91,6 +91,7 @@ declare module "moleculer-apollo-server" {
 		};
 		routeOptions?: ServiceRouteOptions;
 		serverOptions?: Config;
+		autoUpdateSchema?: boolean;
 	}
 
 	export function ApolloService(options: ApolloServiceOptions): ServiceSchema;

src/service.js

@@ -24,12 +24,15 @@ module.exports = function(mixinOptions) {
 		serverOptions: {},
 		createAction: true,
 		subscriptionEventName: "graphql.publish",
+		autoUpdateSchema: true,
 	});
 
 	const serviceSchema = {
 		events: {
 			"$services.changed"() {
-				this.invalidateGraphQLSchema();
+				if (mixinOptions.autoUpdateSchema) {
+					this.invalidateGraphQLSchema();
+				}
 			},
 			[mixinOptions.subscriptionEventName](event) {
 				if (this.pubsub) {

test/unit/service.spec.js

@@ -208,6 +208,33 @@ describe("Test Service", () => {
 			await stop();
 		});
 
+		it("should not invalidate schema when autoUpdateSchema is false", async () => {
+			const { broker, svc, stop } = await startService({
+				autoUpdateSchema: false
+			});
+			svc.invalidateGraphQLSchema = jest.fn();
+
+			await broker.broadcastLocal("$services.changed");
+
+			expect(svc.invalidateGraphQLSchema).toBeCalledTimes(0);
+
+			await stop();
+		});
+
+		it("should not invalidate schema when autoUpdateSchema is true", async () => {
+			const { broker, svc, stop } = await startService({
+				autoUpdateSchema: true
+			});
+			svc.invalidateGraphQLSchema = jest.fn();
+
+			await broker.broadcastLocal("$services.changed");
+
+			expect(svc.invalidateGraphQLSchema).toBeCalledTimes(1);
+			expect(svc.invalidateGraphQLSchema).toBeCalledWith();
+
+			await stop();
+		});
+
 		it("should subscribe to the default subscription event", async () => {
 			const { broker, svc, stop } = await startService();