Add type for asynchronous nightwatch test hooks

types/nightwatch/index.d.ts

@@ -2160,16 +2160,23 @@ export interface NightwatchCustomAssertions {}
 
 export interface NightwatchBrowser extends NightwatchAPI, NightwatchCustomCommands, NightwatchCustomAssertions, NightwatchCustomPageObjects { }
 
-/**
- * Performs an assertion
- *
- */
 export type NightwatchTest = (browser: NightwatchBrowser) => void;
 
-export interface NightwatchTests {
+export interface NightwatchTestFunctions {
     [key: string]: NightwatchTest;
 }
 
+export type NightwatchTestHook = (browser: NightwatchBrowser, done: () => void) => void;
+
+export interface NightwatchTestHooks {
+    before?: NightwatchTestHook;
+    after?: NightwatchTestHook;
+    beforeEach?: NightwatchTestHook;
+    afterEach?: NightwatchTestHook;
+}
+
+export type NightwatchTests = NightwatchTestFunctions | NightwatchTestHooks;
+
 /**
  * Performs an assertion
  *

types/nightwatch/nightwatch-tests.ts

@@ -1,6 +1,9 @@
 import { NightwatchAPI, NightwatchTests } from 'nightwatch';
 
 const test: NightwatchTests = {
+  before: (browser, done) => {
+    done();
+  },
   'Demo test Google': (browser) => {
     browser
       .url('http://www.google.com')