16a78f97f5
The `upgrade` playground example has been disabled for a long time because Protractor initially didn't support running hybrid apps. Now that we use a more recent version of Protractor that handles hybrid apps (also automatically), we can re-enable this long-standing disabled test. Additionally the e2e test logic was outdated and failed because a CSS selector did not match the template of the upgrade example. With this change, the CSS selector has been updated to match the example's template, and also the test has been updated slightly to also ensure that content projection works. PR Close #28490
How to serve the examples
All playground examples are built and served with Bazel. Below is an example that demonstrates how a specific example can be built and served with Bazel:
# e.g. src/zippy_component
yarn bazel run modules/playground/src/zippy_component:devserver
# e.g. src/upgrade
yarn bazel run modules/playground/src/upgrade:devserver