合併打字稿外部全局接口和繼承

Question

之前暴露的問題，我指該項目是在這裏：https://github.com/abauzac/nightwatch-typescript

我的問題是夜巡定義，它在全球（不出口了大量的接口，在命名空間裏或模塊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 { ... } 

我已經添加自定義命令和斷言Nightwatch並試圖合併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) 
} 

但它似乎編譯時接口不被合併：

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

兩個@types和類型的文件夾都包含在tsconfig 「typeRoots」。到目前爲止，我嘗試添加「導出」到接口，命名空間......不知道我錯過了什麼。

Answer 1

我沒有檢查這一點，但我認爲你必須圍繞與一個模塊聲明：

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; 
    } 
    }