chore: initial e2e tests

[tracy-french]

What this PR does / why we need it: This change includes the initial e2e test setup and a confirmation test for the "Get property value" query (see #212). The initial implementation does not rely on a provisioned data source and instead mocks network requests.

The change also includes a GitHub action for running the tests on PR push (following guidance int Grafana testing guide).

Follow-up PRs will include:

• Tests for all query types (including non-happy path tests)
• Tests for the config editor
• Tests for the asset browser
• Increased test writing scalability (e.g., mocking requests, test fixtures, utilities)
• True e2e tests using real SiteWise resources and services

The test added assumes the fix in #286 is merged to test asset property selection.

[tracy-french]

Updated PR with GH action.

[kevinwcyu]

@tracy-french, awesome work!

Most of the comments are just used to mark a place in the code to apply a preceding suggestion, so most of the comments are just duplicates.

Thanks for helping us get the initial e2e tests setup. I think you may be one of the first (possibly the first person) outside of Grafana to try out the new @grafana/plugin-e2e package. Hopefully you found the docs helpful. As @grafana/plugin-e2e and its docs are still a WIP, we'd welcome any feedback about it if you have any.

[kevinwcyu]

Suggested change

	- name: Upload artifacts
	uses: actions/upload-artifact@v4
	if: ${{ (always() && steps.run-tests.outcome == 'success') || (failure() && steps.run-tests.outcome == 'failure') && github.event.organization.login != 'grafana' }}
	with:
	name: playwright-report-${{ matrix.GRAFANA_IMAGE.NAME }}-v${{ matrix.GRAFANA_IMAGE.VERSION }}-${{github.run_id}}
	path: playwright-report/
	retention-days: 30
	- name: Publish report to GCS
	if: ${{ (always() && steps.run-tests.outcome == 'success') || (failure() && steps.run-tests.outcome == 'failure') && github.event.organization.login == 'grafana' }}
	uses: grafana/plugin-actions/publish-report@main
	with:
	grafana-version: ${{ matrix.GRAFANA_IMAGE.VERSION }}

[tracy-french]

This job appears to require additional configuration on the repo? https://github.com/grafana/iot-sitewise-datasource/actions/runs/8145135150/job/22260712602?pr=285#step:13:28.

[kevinwcyu]

Looks like an issue with the GH action being run from a fork. I've asked for some clarification on this from the publish report action author. I'll let you know what the suggested action when they get back to me.

[tracy-french]

@kevinwcyu Thank you for your time and feedback! I will work on addressing all of your comments shortly!

Exciting to be one of the first using @grafana/plugin-e2e. I'll write up a few of my thoughts about the package and drop them here for you.

[tracy-french]

@kevinwcyu All of your feedback has been addressed. Just running into the issues with the dev image and GCS.

[kevinwcyu]

LGTM. Tentatively approving as it should be ready once the docker-compose.yaml file is updated and we figure out what to do with the publish report step (this will be on our end to figure out).

Nice catch on the Format property having an incorrect id.

[kevinwcyu]

Looks like an issue with the GH action being run from a fork. I've asked for some clarification on this from the publish report action author. I'll let you know what the suggested action when they get back to me.

[tracy-french]

@kevinwcyu As the tests are now running on every version and we just have the GCS action left to handle, I'm going to merge this. Maybe we'll see the action succeed 🤞.