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167 lines (148 loc) · 5.19 KB
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'use strict';
var EventEmitter = require('events').EventEmitter,
q = require('q'),
inherit = require('inherit'),
promiseUtils = require('./promise-util'),
GeminiError = require('./errors/gemini-error'),
StateError = require('./errors/state-error'),
BrowserLauncher = require('./browser/launcher'),
CaptureSession = require('../lib/capture-session'),
exec = q.denodeify(require('child_process').exec);
module.exports = inherit(EventEmitter, {
__constructor: function(config, browserLauncher) {
this.config = config;
this._cancelled = false;
this.browserLauncher = browserLauncher || new BrowserLauncher(config);
},
run: function(rootSuite) {
var _this = this;
return this._checkGM()
.then(function() {
_this.emit('begin', {
totalStates: rootSuite.deepStatesCount,
browserIds: Object.keys(_this.config.browsers)
});
return q(_this._prepare());
})
.then(function() {
return _this._runBrowsers(rootSuite.children);
})
.then(function() {
_this.emit('end');
});
},
_prepare: function() {
},
_checkGM: function() {
return exec('gm -version')
.then(function() {
return true;
})
.fail(function() {
return q.reject(new GeminiError(
'Unable to find required package: GraphicsMagick',
'Make sure that GraphicsMagick is installed and availiable in your PATH.\n' +
'Additonal info and installation instructions:\nhttp://www.graphicsmagick.org/'
));
});
},
_runBrowsers: function(suites) {
var _this = this;
return q.all(Object.keys(this.config.browsers).map(function(browserId) {
return _this.browserLauncher.launch(browserId)
.then(function(browser) {
_this.emit('startBrowser', {browserId: browser.id});
return _this._runSuitesInBrowser(suites, browser)
.fin(function() {
_this.emit('stopBrowser', {browserId: browser.id});
return _this.browserLauncher.stop(browser);
});
})
.fail(function(e) {
_this._cancelled = true;
return q.reject(e);
});
}));
},
_runSuitesInBrowser: function(suites, browser) {
var _this = this;
return promiseUtils.seqMap(suites, function(suite) {
return _this._runSuiteInBrowser(suite, browser);
});
},
_runSuiteInBrowser: function(suite, browser) {
if (this._cancelled) {
return q.resolve();
}
var _this = this,
eventData = {
browserId: browser.id,
suiteName: suite.name
};
this.emit('beginSuite', eventData);
return this._runSuiteStates(suite, browser)
.then(function() {
return _this._runSuitesInBrowser(suite.children, browser);
})
.then(function() {
_this.emit('endSuite', eventData);
});
},
_runSuiteStates: function(suite, browser) {
if (!suite.hasStates) {
return q.resolve();
}
var _this = this,
session = new CaptureSession(browser);
return browser.open(this.config.getAbsoluteUrl(suite.url))
.then(function() {
return session.runHook(suite.beforeHook);
})
.then(function() {
return promiseUtils.seqMap(suite.states, function(state) {
return _this._runStateInSession(state, session);
});
})
.then(function() {
return session.runHook(suite.afterHook);
});
},
_runStateInSession: function(state, session) {
if (this._cancelled) {
return q.resolve();
}
var _this = this,
suite = state.suite,
eventData = {
browserId: session.browser.id,
suiteName: state.suite.name,
stateName: state.name
};
if (state.shouldSkip(session.browser)) {
_this.emit('skipState', eventData);
return q();
}
_this.emit('beginState', eventData);
return session.capture(state)
.then(function(image) {
return q(_this._processCapture({
suite: suite,
state: state,
browser: session.browser,
image: image
}));
})
.fail(function(e) {
if (e instanceof StateError) {
_this.emit('error', e);
} else {
return q.reject(e);
}
})
.fin(function() {
_this.emit('endState', eventData);
});
},
_processCapture: function() {
}
});