Add Playwright end-to-end tests

[ErvinRacz]

Add Playwright end-to-end tests

• Added Playwright configuration and workflows for running tests on push and pull requests.
• Created end-to-end tests for applications, channels, groups, instances, and packages.
• Added global setup and teardown scripts for database initialization and cleanup.
• Updated .gitignore to exclude Playwright test results and reports.
• Installed necessary dependencies for Playwright and PostgreSQL client.

How to use

npx playwright test --ui

Testing done

Testing will be done with the PR and the added github workflow.

• Add instructions in readme how to run the test

[Copilot]

Copilot reviewed 19 out of 29 changed files in this pull request and generated 2 comments.

Files not reviewed (10)

• frontend/.gitignore: Language not supported
• frontend/e2e/mask-and-fix-dynamic-parts.css: Language not supported
• frontend/package-lock.json: Language not supported
• frontend/package.json: Language not supported
• frontend/e2e/README.md: Evaluated as low risk
• frontend/e2e/application.spec.ts: Evaluated as low risk
• frontend/e2e/global.setup.ts: Evaluated as low risk
• frontend/e2e/group.spec.ts: Evaluated as low risk
• frontend/e2e/package.spec.ts: Evaluated as low risk
• frontend/e2e/channel.spec.ts: Evaluated as low risk

Comments suppressed due to low confidence (2)

frontend/e2e/instance.spec.ts:10

• [nitpick] The variable name 'instances' is ambiguous. It should be renamed to 'instanceCount'.

await expect(page.getByRole('link', { name: 'instances' })).toContainText('1instances');

frontend/e2e/helpers.ts:23

• The appName parameter is typed as 'any', which is not ideal. It should be typed as 'string'.

export async function deleteApplication(page: Page, appName: any) {

[ErvinRacz]

@tormath1
Do you know if we could host the generated test summary report in the github pages under a folder like playwright-report?

It would be helpful to be able to access it easily in case of test failure.
Currently to see what went wrong, you would need to download the artifact and unzip it.

I tried something like this, but the runner got no permissions:

  deploy-report:
    if: always()
    runs-on: ubuntu-latest
    needs: test
    permissions:
      contents: write
    steps:
      - name: Download Playwright Report Artifact
        uses: actions/download-artifact@v4
        with:
          name: playwright-report
          path: playwright-report

      - name: Deploy Playwright Report to GitHub Pages
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: playwright-report
          publish_branch: gh-pages
          destination_dir: playwright-report