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Automating Visual Testing with Playwright, Argos and GitHub Actions


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Picture de John Noonan sur Unsplash

Visible testing permits builders to establish and repair visible bugs in purposes earlier than they turn out to be an issue. By automating visible testing, builders can make sure that their net purposes look and performance as supposed once they make adjustments and updates.

On this information, we’ll present find out how to automate visible testing with Playwright, Argos, and GitHub Actions. The objective is to be notified of visible adjustments on every pull-request instantly inside GitHub, and repair visible bugs earlier than they make it into manufacturing.



Set up the Argos GitHub App

To get began with Argos, you may first want to put in the Argos GitHub App. This can enable Argos to entry your repositories, add take a look at statuses on pull-request, and notify you when visible adjustments are detected.

To put in Argos app, go to the GitHub Marketplace, subscribe to an Argos plan and full the set up.



Playwright and Argos setup

Playwright is a strong testing framework that gives a terrific developer expertise and good out-of-the-box options for end-to-end testing. To put in Playwright, execute the next command in your terminal and reply the questions within the immediate:

npm init playwright@newest
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To make use of Playwright with Argos, additionally, you will have to put in the next packages:

npm set up --save-dev @argos-ci/cli  @argos-ci/playwright
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Seize the screenshots

As soon as Playwright and Argos app are put in, you may create take a look at recordsdata to seize screenshots of your software. Use the argosScreenshot perform offered by @argos-ci/playwright insure secure screenshots.

For instance, the next take a look at file will take a screenshot of your homepage:

// exams/homepage.spec.ts
import { take a look at } from "@playwright/take a look at";
import { argosScreenshot } from "@argos-ci/playwright";
take a look at.describe("Homepage", () => {
  take a look at("take screenshot", async ({ web page }) => {
    await web page.goto("http://localhost:3000/");
    await argosScreenshot(web page, "homepage");
  });
});
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To run the take a look at, use the playwright take a look at command:

npx playwright take a look at
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If every part is ready up accurately, the take a look at ought to move and it’s best to discover a new screenshot within the /screenshots folder.



Combine with GitHub Actions

With the screenshots captured, now you can combine the Visible Testing into your GitHub Actions Steady Integration. To do that, you must create a brand new GitHub Actions workflow file that runs Playwright exams and uploads screenshots to Argos.

Create a brand new file referred to as .github/workflows/major.yml within the root listing of your repository with the next content material:

# file: .github/workflows/major.yml
identify: CI
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
jobs:
  e2e:
    runs-on: ubuntu-latest
    steps:
      - makes use of: actions/checkout@v3
      - identify: Setup Node.js
        makes use of: actions/setup-node@v3
        with:
          node-version: 18
      - identify: Set up dependencies
        run: npm ci
      - identify: Run exams
        run: npx playwright take a look at
      - identify: Add screenshots to Argos
        run: npx @argos-ci/cli add screenshots
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This workflow defines a job that runs on pull requests to the primary department. The job does the next:

  • Checkout the code from GitHub
  • Setup Node.js 18
  • Set up dependencies
  • Run the exams with Playwright
  • Add the screenshots to Argos

Upon getting added the workflow file, you may commit and push the adjustments to your repository. GitHub will mechanically begin operating the workflow on every pull request.



Monitor Visible Modifications

Now you can begin monitoring visible adjustments in your net software. Argos will detect and report any visible adjustments between your pull request department and your major department.

GitHub test standing
GitHub check status
By clicking on “Particulars” hyperlink, you may overview the outcomes of the comparability in Argos.

Argos instance construct
argos-build

Learn this documentation if you happen to want extra details about visible testing workflow.



Conclusion

On this information, we now have proven you find out how to automate visible testing with Playwright, Argos, and GitHub Actions. By integrating visible testing into your CI workflow, you may catch and repair visible bugs earlier than they make it into manufacturing. With Argos, you may simply configure baseline, monitor visible adjustments, and collaborate together with your group to repair points. By following the steps outlined on this information, you may ensure that your net software appears to be like and capabilities as supposed, whilst you make adjustments and updates.


We hope this put up has been useful. In the event you’re all for studying about how Argos might help you enhance the standard of your net purposes, check out our documentation. And if you happen to’re prepared to begin automating your visible testing, be happy to join a free trial and see how Argos might help you catch bugs.

In the event you want extra details about Visible Testing, it will be a pleasure that can assist you on our Discord community.

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