Percy visual testing for Selenium.js.
$ npm install --save-dev @percy/cli @percy/selenium-webdriver
This is an example using the percySnapshot
function. For other examples of selenium-webdriver
usage, see the Selenium JS docs.
const { Builder } = require('selenium-webdriver');
const percySnapshot = require('@percy/selenium-webdriver');
(async function example() {
let driver = await new Builder().forBrowser('firefox').build();
try {
await driver.get('http://google.com/');
await percySnapshot(driver, 'Google Homepage');
await driver.get('http://example.com/');
await percySnapshot(driver, 'Example Site');
} finally {
await driver.quit();
}
})();
Running the code above directly will result in the following logs:
$ node script.js
[percy] Percy is not running, disabling snapshots
When running with percy exec
, and your project's
PERCY_TOKEN
, a new Percy build will be created and snapshots will be uploaded to your project.
$ export PERCY_TOKEN=[your-project-token]
$ percy exec -- node script.js
[percy] Percy has started!
[percy] Created build #1: https://percy.io/[your-project]
[percy] Running "node script.js"
[percy] Snapshot taken "Google Homepage"
[percy] Snapshot taken "Example Site"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!
percySnapshot(driver, name[, options])
driver
(required) - Aselenium-webdriver
driver instancename
(required) - The snapshot name; must be unique to each snapshotoptions
- See per-snapshot configuration options
We built a tool to help automate migrating to the new CLI toolchain! Migrating can be done by running the following commands and following the prompts:
$ npx @percy/migrate
? Are you currently using @percy/selenium-webdriver (@percy/seleniumjs)? Yes
? Install @percy/cli (required to run percy)? Yes
? Migrate Percy config file? Yes
? Upgrade SDK to @percy/selenium-webdriver@1.0.0? Yes
This will automatically run the changes described below for you.
If you're coming from the @percy/seleniumjs
package, make sure to uninstall that package first
before installing this one.
$ npm uninstall @percy/seleniumjs
Now you can safely install @percy/selenium-webdriver
and @percy/cli
.
If you're coming from a pre-1.0 version of this package, make sure to install @percy/cli
after
upgrading to retain any existing scripts that reference the Percy CLI command.
$ npm install --save-dev @percy/cli
If you have a previous Percy configuration file, migrate it to the newest version with the
config:migrate
command:
$ percy config:migrate
percyScreenshot(driver, name, options)
[ needs @percy/cli 1.27.0-beta.0+ ];
This is an example test using the percyScreenshot
method.
const { Builder } = require('selenium-webdriver');
const { percyScreenshot } = require('@percy/selenium-webdriver'); // both for selenium-webdriver/wdio
(async function example() {
const driver = new webdriver.Builder().usingServer('https://hub-cloud.browserstack.com/wd/hub').withCapabilities(capabilities).build(); // pass automate capabilities
try {
await driver.get('http://google.com/');
await percyScreenshot(driver, 'Screenshot 1');
await driver.get('http://example.com/');
await percyScreenshot(driver, 'Screenshot 2');
} finally {
await driver.quit();
}
})();
driver
(required) - A Selenium driver instancename
(required) - The screenshot name; must be unique to each screenshotoptions
(optional) - There are various options supported by percyScreenshot to server further functionality.freezeAnimation
- Boolean value by default it falls back tofalse
, you can passtrue
and percy will freeze image based animations.percyCSS
- Custom CSS to be added to DOM before the screenshot being taken. Note: This gets removed once the screenshot is taken.ignoreRegionXpaths
- elements in the DOM can be ignored using xpathignoreRegionSelectors
- elements in the DOM can be ignored using selectors.ignoreRegionSeleniumElements
- elements can be ignored using selenium_elements.customIgnoreRegions
- elements can be ignored using custom boundaries- IgnoreRegion:-
-
Description: This class represents a rectangular area on a screen that needs to be ignored for visual diff.
-
Constructor:
init(self, top, bottom, left, right)
-
Parameters:
top
(int): Top coordinate of the ignore region.bottom
(int): Bottom coordinate of the ignore region.left
(int): Left coordinate of the ignore region.right
(int): Right coordinate of the ignore region. -
Raises:ValueError: If top, bottom, left, or right is less than 0 or top is greater than or equal to bottom or left is greater than or equal to right.
-
valid: Ignore region should be within the boundaries of the screen.
-
- IgnoreRegion:-
Note: Automate Percy Token starts with auto
keyword. The command can be triggered using exec
keyword.
$ export PERCY_TOKEN=[your-project-token]
$ percy exec -- [js test command]
[percy] Percy has started!
[percy] [Javascript example] : Starting automate screenshot ...
[percy] Screenshot taken "Javascript example"
[percy] Stopping percy...
[percy] Finalized build #1: https://percy.io/[your-project]
[percy] Done!
Refer to docs here: Percy on Automate