testcafe
Version:
Automated browser testing for the modern web development stack.
119 lines • 18.7 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const events_1 = require("events");
const pinkie_1 = __importDefault(require("pinkie"));
const time_limit_promise_1 = __importDefault(require("time-limit-promise"));
const promisify_event_1 = __importDefault(require("promisify-event"));
const lodash_1 = require("lodash");
const map_reverse_1 = __importDefault(require("map-reverse"));
const runtime_1 = require("../errors/runtime");
const types_1 = require("../errors/types");
const LOCAL_BROWSERS_READY_TIMEOUT = 2 * 60 * 1000;
const REMOTE_BROWSERS_READY_TIMEOUT = 6 * 60 * 1000;
class BrowserSet extends events_1.EventEmitter {
constructor(browserConnectionGroups) {
super();
this.RELEASE_TIMEOUT = 10000;
this.pendingReleases = [];
this.browserConnectionGroups = browserConnectionGroups;
this.browserConnections = lodash_1.flatten(browserConnectionGroups);
this.connectionsReadyTimeout = null;
this.browserErrorHandler = error => this.emit('error', error);
this.browserConnections.forEach(bc => bc.on('error', this.browserErrorHandler));
// NOTE: We're setting an empty error handler, because Node kills the process on an 'error' event
// if there is no handler. See: https://nodejs.org/api/events.html#events_class_events_eventemitter
this.on('error', lodash_1.noop);
}
static async _waitIdle(bc) {
if (bc.idle || !bc.ready)
return;
await promisify_event_1.default(bc, 'idle');
}
static async _closeConnection(bc) {
if (bc.closed || !bc.ready)
return;
bc.close();
await promisify_event_1.default(bc, 'closed');
}
async _getReadyTimeout() {
const isLocalBrowser = connection => connection.provider.isLocalBrowser(connection.id, connection.browserInfo.browserName);
const remoteBrowsersExist = (await pinkie_1.default.all(this.browserConnections.map(isLocalBrowser))).indexOf(false) > -1;
return remoteBrowsersExist ? REMOTE_BROWSERS_READY_TIMEOUT : LOCAL_BROWSERS_READY_TIMEOUT;
}
_createPendingConnectionPromise(readyPromise, timeout, timeoutError) {
const timeoutPromise = new pinkie_1.default((_, reject) => {
this.connectionsReadyTimeout = setTimeout(() => reject(timeoutError), timeout);
});
return pinkie_1.default
.race([readyPromise, timeoutPromise])
.then(value => {
this.connectionsReadyTimeout.unref();
return value;
}, error => {
this.connectionsReadyTimeout.unref();
throw error;
});
}
async _waitConnectionsOpened() {
const connectionsReadyPromise = pinkie_1.default.all(this.browserConnections
.filter(bc => !bc.opened)
.map(bc => promisify_event_1.default(bc, 'opened')));
const timeoutError = new runtime_1.GeneralError(types_1.RUNTIME_ERRORS.cannotEstablishBrowserConnection);
const readyTimeout = await this._getReadyTimeout();
await this._createPendingConnectionPromise(connectionsReadyPromise, readyTimeout, timeoutError);
}
_checkForDisconnections() {
const disconnectedUserAgents = this.browserConnections
.filter(bc => bc.closed)
.map(bc => bc.userAgent);
if (disconnectedUserAgents.length)
throw new runtime_1.GeneralError(types_1.RUNTIME_ERRORS.cannotRunAgainstDisconnectedBrowsers, disconnectedUserAgents.join(', '));
}
//API
static from(browserConnections) {
const browserSet = new BrowserSet(browserConnections);
const prepareConnection = pinkie_1.default.resolve()
.then(() => {
browserSet._checkForDisconnections();
return browserSet._waitConnectionsOpened();
})
.then(() => browserSet);
return pinkie_1.default
.race([
prepareConnection,
promisify_event_1.default(browserSet, 'error')
])
.catch(async (error) => {
await browserSet.dispose();
throw error;
});
}
releaseConnection(bc) {
if (this.browserConnections.indexOf(bc) < 0)
return pinkie_1.default.resolve();
lodash_1.pull(this.browserConnections, bc);
bc.removeListener('error', this.browserErrorHandler);
const appropriateStateSwitch = !bc.permanent ?
BrowserSet._closeConnection(bc) :
BrowserSet._waitIdle(bc);
const release = time_limit_promise_1.default(appropriateStateSwitch, this.RELEASE_TIMEOUT).then(() => lodash_1.pull(this.pendingReleases, release));
this.pendingReleases.push(release);
return release;
}
async dispose() {
// NOTE: When browserConnection is cancelled, it is removed from
// the this.connections array, which leads to shifting indexes
// towards the beginning. So, we must copy the array in order to iterate it,
// or we can perform iteration from the end to the beginning.
if (this.connectionsReadyTimeout)
this.connectionsReadyTimeout.unref();
map_reverse_1.default(this.browserConnections, bc => this.releaseConnection(bc));
await pinkie_1.default.all(this.pendingReleases);
}
}
exports.default = BrowserSet;
module.exports = exports.default;
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{ EventEmitter } from 'events';\nimport Promise from 'pinkie';\nimport getTimeLimitedPromise from 'time-limit-promise';\nimport promisifyEvent from 'promisify-event';\nimport { noop, pull as remove, flatten } from 'lodash';\nimport mapReverse from 'map-reverse';\nimport { GeneralError } from '../errors/runtime';\nimport { RUNTIME_ERRORS } from '../errors/types';\n\nconst LOCAL_BROWSERS_READY_TIMEOUT  = 2 * 60 * 1000;\nconst REMOTE_BROWSERS_READY_TIMEOUT = 6 * 60 * 1000;\n\nexport default class BrowserSet extends EventEmitter {\n    constructor (browserConnectionGroups) {\n        super();\n\n        this.RELEASE_TIMEOUT = 10000;\n\n        this.pendingReleases = [];\n\n        this.browserConnectionGroups = browserConnectionGroups;\n        this.browserConnections      = flatten(browserConnectionGroups);\n\n        this.connectionsReadyTimeout = null;\n\n        this.browserErrorHandler = error => this.emit('error', error);\n\n        this.browserConnections.forEach(bc => bc.on('error', this.browserErrorHandler));\n\n        // NOTE: We're setting an empty error handler, because Node kills the process on an 'error' event\n        // if there is no handler. See: https://nodejs.org/api/events.html#events_class_events_eventemitter\n        this.on('error', noop);\n    }\n\n    static async _waitIdle (bc) {\n        if (bc.idle || !bc.ready)\n            return;\n\n        await promisifyEvent(bc, 'idle');\n    }\n\n    static async _closeConnection (bc) {\n        if (bc.closed || !bc.ready)\n            return;\n\n        bc.close();\n\n        await promisifyEvent(bc, 'closed');\n    }\n\n    async _getReadyTimeout () {\n        const isLocalBrowser      = connection => connection.provider.isLocalBrowser(connection.id, connection.browserInfo.browserName);\n        const remoteBrowsersExist = (await Promise.all(this.browserConnections.map(isLocalBrowser))).indexOf(false) > -1;\n\n        return remoteBrowsersExist ? REMOTE_BROWSERS_READY_TIMEOUT : LOCAL_BROWSERS_READY_TIMEOUT;\n    }\n\n    _createPendingConnectionPromise (readyPromise, timeout, timeoutError) {\n        const timeoutPromise = new Promise((_, reject) => {\n            this.connectionsReadyTimeout = setTimeout(() => reject(timeoutError), timeout);\n        });\n\n        return Promise\n            .race([readyPromise, timeoutPromise])\n            .then(\n                value => {\n                    this.connectionsReadyTimeout.unref();\n                    return value;\n                },\n                error => {\n                    this.connectionsReadyTimeout.unref();\n                    throw error;\n                }\n            );\n    }\n\n    async _waitConnectionsOpened () {\n        const connectionsReadyPromise = Promise.all(\n            this.browserConnections\n                .filter(bc => !bc.opened)\n                .map(bc => promisifyEvent(bc, 'opened'))\n        );\n\n        const timeoutError = new GeneralError(RUNTIME_ERRORS.cannotEstablishBrowserConnection);\n        const readyTimeout = await this._getReadyTimeout();\n\n        await this._createPendingConnectionPromise(connectionsReadyPromise, readyTimeout, timeoutError);\n    }\n\n    _checkForDisconnections () {\n        const disconnectedUserAgents = this.browserConnections\n            .filter(bc => bc.closed)\n            .map(bc => bc.userAgent);\n\n        if (disconnectedUserAgents.length)\n            throw new GeneralError(RUNTIME_ERRORS.cannotRunAgainstDisconnectedBrowsers, disconnectedUserAgents.join(', '));\n    }\n\n\n    //API\n    static from (browserConnections) {\n        const browserSet = new BrowserSet(browserConnections);\n\n        const prepareConnection = Promise.resolve()\n            .then(() => {\n                browserSet._checkForDisconnections();\n                return browserSet._waitConnectionsOpened();\n            })\n            .then(() => browserSet);\n\n        return Promise\n            .race([\n                prepareConnection,\n                promisifyEvent(browserSet, 'error')\n            ])\n            .catch(async error => {\n                await browserSet.dispose();\n\n                throw error;\n            });\n    }\n\n    releaseConnection (bc) {\n        if (this.browserConnections.indexOf(bc) < 0)\n            return Promise.resolve();\n\n        remove(this.browserConnections, bc);\n\n        bc.removeListener('error', this.browserErrorHandler);\n\n        const appropriateStateSwitch = !bc.permanent ?\n            BrowserSet._closeConnection(bc) :\n            BrowserSet._waitIdle(bc);\n\n        const release = getTimeLimitedPromise(appropriateStateSwitch, this.RELEASE_TIMEOUT).then(() => remove(this.pendingReleases, release));\n\n        this.pendingReleases.push(release);\n\n        return release;\n    }\n\n    async dispose () {\n        // NOTE: When browserConnection is cancelled, it is removed from\n        // the this.connections array, which leads to shifting indexes\n        // towards the beginning. So, we must copy the array in order to iterate it,\n        // or we can perform iteration from the end to the beginning.\n        if (this.connectionsReadyTimeout)\n            this.connectionsReadyTimeout.unref();\n\n        mapReverse(this.browserConnections, bc => this.releaseConnection(bc));\n\n        await Promise.all(this.pendingReleases);\n    }\n}\n"]}