Issue number: N/A
---------
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
Screenshots in a branch are currently compared against the screenshots
on `main`. While we ultimately need to compare against ground truths in
`main`, this can cause tests to seemingly fail at random. For example,
this branch was created based on
eb2772c0ce.
However,
381de0b3d3
was added to `main` after the first commit and has new screenshot diffs.
I do not have the latest ground truths for the changed screenshots in
this branch, so the screenshot tests failed in
https://github.com/ionic-team/ionic-framework/actions/runs/4995702351/jobs/8947969061
even though I did not change any component implementations.
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- Test runs in CI now run against the ground truths available in the
branch. When a commit is added to the merge queue, it will be tested
against the latest `main` and any commits ahead of it in the queue. As a
result, if there _is_ a conflict then the test run will fail at that
point and the commit will be removed from the merge queue.
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->
## Other information
<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->
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submitting a pull request, or let us know here if you need any help:
https://ionicframework.com/docs/building/contributing -->
<!-- Some docs updates need to be made in the `ionic-docs` repo, in a
separate PR. See
https://github.com/ionic-team/ionic-framework/blob/main/.github/CONTRIBUTING.md#modifying-documentation
for details. -->
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
<!-- Issues are required for both bug fixes and features. -->
Unbuilt changes in `core` are not always being caught because the
`api.txt` file is not cached.
Stencil will potentially update both the `src/components.d.ts` and
`api.txt` files when there are built changes to the public API. We need
to check both files when accounting for unbuilt changes.
Example: https://github.com/ionic-team/ionic-framework/pull/25858
This had updates to `api.txt` that were not built.
Built changes PR:
https://github.com/ionic-team/ionic-framework/pull/25933
Example of this change catching `api.txt` changes as intended:
https://github.com/ionic-team/ionic-framework/pull/27165
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- GitHub Actions core build step caches `api.txt`
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->
## Other information
<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->
