chore: add a test to verify eventHook registration

lib/server-impl.test.js

@@ -2,6 +2,7 @@
 
 const test = require('ava');
 const proxyquire = require('proxyquire');
+const { EventEmitter } = require('events');
 const express = require('express');
 const getLogger = require('../test/fixtures/no-logger');
 
@@ -13,6 +14,8 @@ const getApp = proxyquire('./app', {
     },
 });
 
+const eventStore = new EventEmitter();
+
 const serverImpl = proxyquire('./server-impl', {
     './app': getApp,
     './metrics': {
@@ -21,8 +24,10 @@ const serverImpl = proxyquire('./server-impl', {
         },
     },
     './db': {
-        createStores(o) {
-            return o;
+        createStores() {
+            return {
+                eventStore,
+            };
         },
     },
     './options': {
@@ -58,3 +63,16 @@ test('should call preRouterHook', async t => {
     });
     t.true(called === 1);
 });
+
+test('should call eventHook', async t => {
+    let called = 0;
+    await serverImpl.start({
+        port: 0,
+        getLogger,
+        eventHook: () => {
+            called++;
+        },
+    });
+    eventStore.emit('feature-created', {});
+    t.true(called === 1);
+});