78 lines
2.3 KiB
TypeScript
78 lines
2.3 KiB
TypeScript
import * as childProcess from 'child_process';
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import * as path from 'path';
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import * as http from 'http';
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import * as v8 from 'v8';
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export const ifit = (condition: boolean) => (condition ? it : it.skip);
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export const ifdescribe = (condition: boolean) => (condition ? describe : describe.skip);
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export const delay = (time: number) => new Promise(resolve => setTimeout(resolve, time));
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type CleanupFunction = (() => void) | (() => Promise<void>)
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const cleanupFunctions: CleanupFunction[] = [];
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export async function runCleanupFunctions () {
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for (const cleanup of cleanupFunctions) {
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const r = cleanup();
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if (r instanceof Promise) { await r; }
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}
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cleanupFunctions.length = 0;
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}
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export function defer (f: CleanupFunction) {
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cleanupFunctions.unshift(f);
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}
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class RemoteControlApp {
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process: childProcess.ChildProcess;
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port: number;
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constructor (proc: childProcess.ChildProcess, port: number) {
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this.process = proc;
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this.port = port;
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}
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remoteEval = (js: string): Promise<any> => {
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return new Promise((resolve, reject) => {
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const req = http.request({
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host: '127.0.0.1',
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port: this.port,
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method: 'POST'
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}, res => {
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const chunks = [] as Buffer[];
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res.on('data', chunk => { chunks.push(chunk); });
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res.on('end', () => {
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const ret = v8.deserialize(Buffer.concat(chunks));
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if (Object.prototype.hasOwnProperty.call(ret, 'error')) {
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reject(new Error(`remote error: ${ret.error}\n\nTriggered at:`));
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} else {
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resolve(ret.result);
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}
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});
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});
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req.write(js);
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req.end();
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});
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}
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remotely = (script: Function, ...args: any[]): Promise<any> => {
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return this.remoteEval(`(${script})(...${JSON.stringify(args)})`);
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}
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}
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export async function startRemoteControlApp () {
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const appPath = path.join(__dirname, 'fixtures', 'apps', 'remote-control');
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const appProcess = childProcess.spawn(process.execPath, [appPath]);
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appProcess.stderr.on('data', d => {
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process.stderr.write(d);
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});
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const port = await new Promise<number>(resolve => {
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appProcess.stdout.on('data', d => {
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const m = /Listening: (\d+)/.exec(d.toString());
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if (m && m[1] != null) {
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resolve(Number(m[1]));
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}
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});
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});
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defer(() => { appProcess.kill('SIGINT'); });
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return new RemoteControlApp(appProcess, port);
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}
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