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Utilities for Automated UI Testing of Enact components

This package includes the common WebDriver configurations and some utility modules for executing automated UI tests from Enact UI library packages. This package is not intended to be used directly and must be configured as a devDependency of the UI library.

Setting up a UI Library

  1. Add @enact/ui-test-utils as a devDependency: npm i --save-dev @enact/ui-test-utils

  2. Create the tests/ui folder structure within the UI library

  3. Add apps and specs folders to tests/ui

  4. Add local WebDriver configuration files within tests/ui

    • wdio.conf.js containing module.exports = require('@enact/ui-test-utils/ui/wdio.conf.js');
    • wdio.docker.conf.js containing module.exports = require('@enact/ui-test-utils/ui/wdio.docker.conf.js');
    • wdio.tv.conf.js containing module.exports = require('@enact/ui-test-utils/ui/wdio.tv.conf.js');

  • and tests/screenshot

    • wdio.conf.js containing module.exports = require('@enact/ui-test-utils/screenshot/wdio.conf.js');
    • wdio.docker.conf.js containing module.exports = require('@enact/ui-test-utils/screenshot/wdio.docker.conf.js');
    • wdio.tv.conf.js containing module.exports = require('@enact/ui-test-utils/screenshot/wdio.tv.conf.js');
  1. Add npm scripts for each of the above configuration files. There are likely other scripts already defined so these will be added to the existing scripts.
   "scripts": {
      "test-ui": "start-tests tests/ui/wdio.conf.js",
      "test-ui-docker": "start-tests tests/ui/wdio.docker.conf.js",
      "test-ui-tv": "start-tests tests/ui/wdio.tv.conf.js",
      "test-ss": "start-tests tests/screenshot/wdio.conf.js",
      "test-ss-docker": "start-tests tests/screenshot/wdio.docker.conf.js",
      "test-ss-tv": "start-tests tests/screenshot/wdio.tv.conf.js",
   }
  1. Optionally configure different ESLint and git configuration rules using .eslintrc.js and .gitignore files, respectively

Creating tests

Within the UI Library, create an app for testing in /tests/ui/apps and create a corresponding test in /tests/ui/specs.

The Page component from @enact/ui-test-utils/test/Page contains useful methods for loading tests.

Testing on TV

Pass the IP address of the TV as an environment variable and use the test-ui-tv task:

TV_IP=10.0.1.1 npm run test-ui-tv

Filtering Tests

Filtering UI by Component

npm run test-ui -- --spec <pattern>

Example 1 - will execute tests for 'Button'

npm run test-ui -- --spec Button

Example 2 - will execute tests for 'InputField' component

npm run test-ui -- --spec /InputField

Note: <pattern> can also be a regex and may need to be in quotes to prevent expansion on the command line.

Filtering Screenshot by Component

npm run test-ss -- --component <pattern>

Note: pattern may need to be in quotes to prevent expansion on the command line if you use a regex.

Example 1 - uses regular expression to match only tests that begin with 'Button'

npm run test-ss -- --component "^Button"

Example 2 - match all tests that contain 'Button'

npm run test-ss -- --component Button

Filtering Screenshot by Theme

npm run test-ss -- --spec Light-specs

You can combine theme and component filtering for more precise runs:

npm run test-ss -- --component CheckboxItem --spec Default-specs

Filtering Screenshot by Title

Search within the title of the screenshot for a specific regex string:

npm run test-ss -- --title "color = green"

As before, you can combine multiple filters:

npm run test-ss -- --component "^Button" --title "disabled"

Filtering Screenshot by Test ID

Execute the first test of each component:

npm run test-ss -- --id 0

The test ID can be gotten from the failed tests results, looking at the request output or by counting the number of tests in a component.

As before, you can combine multiple filters:

npm run test-ss -- --component "^Button" --id 10

Failed UI Test Screenshots

When a test fails, a screenshot will be captured showing the state when it failed. The screenshots are saved to ./tests/ui/errorShots/. The test run will display the filename for a failed test:

Example:

F
	Screenshot location: ./tests/ui/errorShots/should-meet-initial-conditions.png

Viewing Test Results

After a test runs, if new screenshots are generated, a page is created with links to open each of the images. To open this file (on a Mac):

open tests/screenshot/dist/newFiles.html

If there are test failures, a failure log is created that contains links to the sets of images. To open this file (on a Mac):

open tests/screenshot/dist/failedTests.html

Images can be navigated using the keyboard arrow keys. Click on an image to zoom in. Click out of the image to zoom out.

In the output, the test case button opens the sample app with the parameters that produced the output. This requires that a server be running on port 3000. If you have globally installed the serve command with npm install -g serve you can start the server like this:

serve tests/screenshot/dist

Optimizing Building

Re-run tests without building

The --skip-build option can be used to skip packing Enact and the apps directory. Changes to the Enact version or test apps will not be picked up.

npm run test-ui -- --spec /Input --skip-build

Advanced Usage

Setting the Number of Concurrent Instances

To limit or increase the number of concurrent tests, use the --instances option:

npm run test-ui -- --instances 2

Running Tests Offline

By default, the latest versions of various drivers will be downloaded before starting tests. This can be skipped when no internet connection is available by specifying the --offline option:

npm run test-ui -- --offline

Running with visible browser

By default, tests run in 'headless' mode, which hides the browser window used for testing. You can watch the tests run by passing --visible:

npm run test-ui -- --visible

Running with visible browser and filtering by component

For example, filtering for the component 'Input'.

npm run test-ui -- --visible --spec /Input

Loading sample apps in a browser

This requires that a server be running on port 3000. If you have globally installed the serve command with npm install -g serve you can start the server like this:

serve dist

To open a specific test app, open the URL path for the test. The path will match the name of the JS source file for the app. For example, to open the VirtualList test app, navigate to:

http://localhost:3000/VirtualList-View/

Viewing screenshot tests in the browser

Navigate to a URL using the component name and test case number. Change 'Sandstone-View' to the name of the view appropriate for your library.

An index page will be served when no component is specified. Select a test from the list to open it.

localhost:3000/Sandstone-View/

You can go directly to a test by specifying the component name and test ID number:

localhost:3000/Sandstone-View/?component=<component name>&testId=<number of the test>

Example:

localhost:3000/Sandstone-View/?component=RadioItem&testId=10