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231 lines (182 loc) · 6.91 KB
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'use strict';
const debug = require('debug');
const chalk = require('chalk');
const _ = require('lodash');
const PassthroughEmitter = require('./passthrough-emitter');
const Promise = require('bluebird');
const pluginsLoader = require('plugins-loader');
const gracefulFs = require('graceful-fs');
const Config = require('./config');
const GeminiError = require('./errors/gemini-error');
const readTests = require('./test-reader');
const Runner = require('./runner');
const Events = require('./constants/events');
const StateProcessor = require('./state-processor');
const SuiteCollection = require('./suite-collection');
const {temp} = require('gemini-core');
const PREFIX = require('../package').name + '-';
Promise.promisifyAll(require('fs-extra'));
// patch fs module prototype for preventing EMFILE error (too many open files)
gracefulFs.gracefulify(require('fs'));
const parseBrowsers = (browsers) => {
return browsers && browsers.replace(/\s/g, '').split(',');
};
module.exports = class Gemini extends PassthroughEmitter {
static create(config, allowOverrides) {
return new Gemini(config, allowOverrides);
}
static readRawConfig(filePath) {
return Config.readRawConfig(filePath);
}
constructor(config, allowOverrides) {
super();
this.config = new Config(config, allowOverrides);
this.events = Events;
this.SuiteCollection = SuiteCollection;
setupLog(this.config.system.debug);
this._loadPlugins();
}
extendCli(parser) {
this.emit(Events.CLI, parser);
}
getScreenshotPath(suite, stateName, browserId) {
return this.config.forBrowser(browserId).getScreenshotPath(suite, stateName);
}
getBrowserCapabilites(browserId) {
return this.config.forBrowser(browserId).desiredCapabilities;
}
getValidBrowsers(browsers) {
return _.intersection(browsers, this.browserIds);
}
checkUnknownBrowsers(browsers) {
const browsersFromConfig = this.browserIds;
const unknownBrowsers = _.difference(browsers, browsersFromConfig);
if (unknownBrowsers.length) {
console.warn(
`${chalk.yellow('WARNING:')} Unknown browsers id: ${unknownBrowsers.join(', ')}.\n` +
`Use one of the browser ids specified in config file: ${browsersFromConfig.join(', ')}`
);
}
}
get browserIds() {
return this.config.getBrowserIds();
}
update(paths, options) {
return this._exec(() => this._run(StateProcessor.createScreenUpdater(options), paths, options));
}
test(paths, options) {
return this._exec(() => this._run(StateProcessor.createTester(this.config), paths, options));
}
readTests(paths, options = {}) {
return this._exec(() => this._readTests(paths, options));
}
_exec(fn) {
return this._init().then(() => fn());
}
_init() {
this._init = () => Promise.resolve(); // init only once
return this.emitAndWait(Events.INIT);
}
_loadPlugins() {
pluginsLoader.load(this, this.config.system.plugins, PREFIX);
}
_readTests(paths, options) {
options = _.assignIn(options, {paths});
return readTests(this, this.config, options)
.then((rootSuite) => {
if (options.grep) {
applyGrep_(options.grep, rootSuite);
}
const suiteCollection = new SuiteCollection(rootSuite.children);
this.emit(Events.AFTER_TESTS_READ, {suiteCollection});
return suiteCollection;
});
function applyGrep_(grep, suite) {
if (!suite.hasStates) {
_.clone(suite.children).forEach((child) => {
applyGrep_(grep, child, suite);
});
} else {
if (!grep.test(suite.fullName)) {
suite.parent.removeChild(suite);
}
}
if (!suite.hasStates && !suite.children.length && suite.parent) {
suite.parent.removeChild(suite);
}
}
}
_run(stateProcessor, paths, options) {
if (!options) {
//if there are only two arguments, they are
//(stateProcessor, options) and paths are
//the default.
options = paths;
paths = undefined;
}
options = options || {};
options.reporters = options.reporters || [];
temp.init(this.config.system.tempDir);
const runner = Runner.create(this.config, stateProcessor);
const envBrowsers = parseBrowsers(process.env.GEMINI_BROWSERS);
const envSkipBrowsers = parseBrowsers(process.env.GEMINI_SKIP_BROWSERS);
options.browsers = options.browsers || envBrowsers;
this._passThroughEvents(runner);
// it is important to require signal handler here in order to guarantee subscribing to "INTERRUPT" event
require('./signal-handler').on(Events.INTERRUPT, (data) => {
this.emit(Events.INTERRUPT, data);
runner.cancel();
});
if (options.browsers) {
this.checkUnknownBrowsers(options.browsers);
}
const getTests = (source, options) => {
return source instanceof SuiteCollection
? Promise.resolve(source)
: this._readTests(source, options);
};
return getTests(paths, options)
.then((suiteCollection) => {
this.checkUnknownBrowsers(envSkipBrowsers);
const validSkippedBrowsers = this.getValidBrowsers(envSkipBrowsers);
suiteCollection.skipBrowsers(validSkippedBrowsers);
options.reporters.forEach((reporter) => applyReporter(runner, reporter));
let testsStatistic;
runner.on(Events.END, (stats) => testsStatistic = stats);
return runner.run(suiteCollection)
.then(() => testsStatistic);
});
}
_passThroughEvents(runner) {
this.passthroughEvent(runner, _.values(Events));
}
};
function applyReporter(runner, reporter) {
if (typeof reporter === 'string') {
reporter = {name: reporter};
}
if (typeof reporter === 'object') {
const reporterPath = reporter.path;
try {
reporter = require('./reporters/' + reporter.name);
} catch (e) {
if (e.code === 'MODULE_NOT_FOUND') {
throw new GeminiError('No such reporter: ' + reporter.name);
}
throw e;
}
return reporter(runner, reporterPath);
}
if (typeof reporter !== 'function') {
throw new TypeError('Reporter must be a string, an object or a function');
}
reporter(runner);
}
function setupLog(isDebug) {
if (isDebug) {
Promise.config({
longStackTraces: true
});
debug.enable('gemini:*');
}
}