合并打字稿外部全局接口和继承

Question

之前暴露的问题，我指该项目是在这里：https://github.com/abauzac/nightwatch-typescript

我的问题是夜巡定义，它在全球（不出口了大量的接口，在命名空间里或模块https://github.com/DefinitelyTyped/DefinitelyTyped/blob/38bd4efd5dc8c666f70d77b020a0b64a13ce3980/types/nightwatch/index.d.ts），包括：

./node_modules/@types/nightwatch：

export interface NightwatchCustomCommands { /* empty interface */ } 
export interface NightwatchCustomAssertions { /* empty interface */ } 

export interface NightwatchBrowser extends NightwatchCustomCommands, NightwatchCustomAssertions, ... { ... } 

export interface NightwatchAssertions extends NightwatchBrowser { ... } 

我已经添加自定义命令和断言Nightwatch并试图合并NightwatchCustomCommands和NightwatchCustomAssertions：

./types/index.d.ts

import { NightwatchAssertions, NightwatchBrowser } from "nightwatch"; 

// merge interfaces with nightwatch types 

interface NightwatchCustomAssertions { 
    compareScreenshot(this: NightwatchBrowser, filename: string, expected: number, callback: Function); 
} 

interface NightwatchCustomCommands { 
    wplogin(this: NightwatchBrowser, callback?: Function):this; 

    compareScreenshot(this: NightwatchBrowser, filename: string, expected?: number, callback?: Function) 
} 

但它似乎编译时接口不被合并：

Property 'wplogin' does not exist on type 'NightwatchBrowser'. 
Property 'compareScreenshot' does not exist on type 'NightwatchAssertions'. 

两个@types和类型的文件夹都包含在tsconfig “typeRoots”。到目前为止，我尝试添加“导出”到接口，命名空间......不知道我错过了什么。

Answer 1

我没有检查这一点，但我认为你必须围绕与一个模块声明：

import * as NW from "nightwatch"; 

    declare module "nightwatch" { 
    export interface NightwatchCustomAssertions { 
     compareScreenshot(this: NW.NightwatchBrowser, filename: string, expected: number, callback: Function): any; 
    } 

    export interface NightwatchCustomCommands { 
     wplogin(this: NW.NightwatchBrowser, callback?: Function):this; 
     compareScreenshot(this: NW.NightwatchBrowser, filename: string, expected?: number, callback?: Function): any; 
    } 
    }