Utility which contains common modules for gemini and hermione.
Table of Contents
- SetsBuilder
- Options
- BrowserPool
- events
- promiseUtils
- BrowserAgent
- Errors
- Image
- Temp
- clientBdridge
- coverageLevel
Creates mapping of test files with browsers in which they should be run and vice versa.
Example of usage:
const SetsBuilder = require('gemini-core').SetsBuilder;
const sets = {
desktop: {
files: ['desktop/tests/**.js'],
ignoreFiles: ['desktop/tests/fixtures/**'], // exclude directories from reading while test finding
browsers: ['bro1'],
},
touch-phone: {
files: ['touch-phone/tests'],
browsers: ['bro2']
}
};
SetsBuilder
.create(sets, {defaultDir: 'default/path'}) // creates setsBuilder using specified tests and options
.useSets(['desktop']) // use only the specified sets
.useBrowsers(['bro1']) // use only specified browsers
.useFiles(['desktop/tests/test.js']) // use only specified files if sets
// and files to use are not specified
.build('/root', globOpts, ['.js', '.ts']) // builds a collection of sets with paths expanded according
// to the project root, glob options and file extensions
.then((setCollection) => {
setCollection.groupByFile(); // groups all browsers of test-sets by file:
// {'desktop/tests/test.js': ['bro1']}
setCollection.groupByBrowser(); // groups all files of test-sets by browser:
// {'bro': ['desktop/tests/test.js']}
})
.done();
Returns an object with some options.
const options = require('gemini-core').config.options;
const sets = options.sets; // returns a section for configparser with two options – files and browsers.
// Default value is an empty set - all: {files: []}
Example:
const BrowserPool = require('gemini-core').BrowserPool;
// Some browser realization
class Browser {
constructor(id) {
this.id = 'bro'; // required field
this.sessionId = null; // required field
}
launch() {
return doLaunch()
.then((sessionId) => this.sessionId = sessionId);
}
// required method
reset() {
return doSomeReset();
}
quit() {
return doQuit();
}
}
const BrowserManager = {
create: (id) => new Browser(id),
start: (browser) => browser.launch(),
onStart: (browser) => emitter.emitAndWait('sessionStart', browser),
onQuit: (browser) => emitter.emitAndWait('sessionEnd', browser),
quit: (browser) => browser.quit()
};
const config = {
forBrowser: (id) => {
return {
parallelLimit: 1, // maximum number of specific browser sessions executed in parallel
sessionUseLimit: 2 // maxiumu number of session reuse (test per session, for example)
};
},
getBrowserIds: () => config.getBrowserIds(),
system: {
parallelLimit: 10 // maximum number of browser sessions at all
}
};
const pool = BrowserPool.create(BrowserManager, {
logNamespace: 'gemini', // prefix for logger. log = require('debug')(`${logNamespace}:pool:...`)
config
});
return pool.getBrowser('bro'/*, {highPriority: true}*/)
.then((bro) => {
...
return pool.freeBrowser(bro);
});
Node.js event emitter with promises support.
Node.js builtin EventEmitter
class executes all handlers synchronously without waiting for completion of any async operations that may happen inside.
AsyncEmitter
is the subclass of EventEmitter
which adds ability to return a promise from event handler and wait until it resolved. Just use emitAndWait
instead of emit
:
const AsyncEmitter = require('gemini-core').events.AsyncEmitter;
const emitter = new AsyncEmitter();
emitter.on('event', function() {
return Promise.delay(1000);
});
emitter.emitAndWait('event')
.then(function() {
console.log('All handlers finished'); // Would be called after 1 second
});
emitAndWait
returns promise.
passthroughEvent(from, to, event)
Passes event
from from
to to
. event
can be an array of events.
waitForResults(promises)
Waits for all promises in array to be resolved or rejected. If any promise is rejected - rejects with the first rejection error, otherwise resolves.
Example:
const BrowserAgent = require('gemini-core').BrowserAgent;
const BrowserPool = require('gemini-core').BrowserPool;
const pool = BrowserPool.create(/*BrowserManager, config*/);
const browserAgent = BrowserAgent.create('bro-id', pool);
return browserAgent.getBrowser(/*{highPriority: true}*/)
.then((bro) => {
...
return browserAgent.freeBrowser(bro/*, {force: true}*/);
});
This error will be thrown on browser pool cancel:
const BrowserPool = require('gemini-core').BrowserPool;
const CancelledError = require('gemini-core').errors.CancelledError;
...
pool.getBrowser('bro')
.then((bro) => ...)
.catch((e) => {
if (e instanceof CancelledError) {
console.log('cancelled')
}
});
pool.cancel();
API for working with images.
const {Image} = require('gemini-core');
const imgBuffer = new Buffer('someBufferString', 'base64');
const image = new Image(imgBuffer);
const imageSize = image.getSize();
Crop image to the passed sizes depending on scale factor. Modifies current image. Returns Promise with image instance.
const image = new Image(imgBuffer);
const cropArea = {
top: 10,
left: 10,
width: 100,
height: 100
};
image.crop(cropArea, 2); // will crop double sized image i.e width=200, heigth=200 etc.
Returns object with current image size e.g. {width: 100, height: 100}
Returns RGBA color of the passed image pixel in row. Takes pixel number in row as first argument and row nomber as second. Returns object with color.
const image = new Image(imgBuffer);
const color = image.getRGBA(1, 2); // {r: 255, g: 0, b: 0, a:255}
Save image to the passed path. Asynchronous operation. Returns Promise with current image instance.
Fill image area with black color depending on scale factor.
const image = new Image(imgBuffer);
const clearArea = {
top: 10,
left: 10,
width: 100,
height: 100
};
image.clear(clearArea, {scaleFactor: 1});
Append another image to current. Modifies current image.
const image1 = new Image(imgBuffer);
const image2 = new Image(imgBuffer);
image1.join(image2);
Returns new Image instance from base64 hash.
Convert object-like RGB color to string.
const color = Image.RGBToString({r: 255, g: 0, b: 0}); // returns #ff0000
Compare images with passed options. Asynchronous operation. Returns compare result sa Boolean value.
const opts = {
canHaveCaret: true,
pixelRatio: 1,
tolerance: 2,
antialiasingTolerance: 3
};
return Image.compare(path1, path2, opts)
.then((isEqual) => {
console.log(isEqual);
});
Save new diff image with passed options on the file system.
const diffOpts = {
reference: '/ref/path/image.png',
current: '/curr/path/image.png',
diff: '/diff/path/image.png',
diffColor: '#f5f5f5',
tolerance: 2
};
return Image.buildDiff(diffOpts); // will save image with diff to /diff/path/image.png
Class for creating temp direcroty for image save. Directory will be removed on process end.
Init temp directory.
Generate random path relative temp directory.
Serialize Temp instance.
Attach passed directory to the current Temp instance.
const {clientBridge} = require('gemini-core');
return clientBridge.build(browser, {calibration, coverage});
const {coverage: {coverageLevel}} = require('gemini-core');
coverageLevel.merge(oldValue, newValue);