Previously we were adding `/assets/discourse/tests/core_plugin_tests.js` to the test html all the time. This works in development mode, but fails silently when using testem via the `ember test` CLI, because there is no proxy running.
This commit makes a few changes to fix this, and make it more useful:
- Only renders the plugin `<script>` when in development mode, or when `LOAD_PLUGINS=1` (matching core's behavior)
- Only loads plugin translations based on the same logic
- When running via testem, and the above conditions are met, testem is configured to proxy `core_plugin_tests.js` through to a rails server. (port based on the `UNICORN_PORT` env variable)
- Adds a descriptive error if the plugin `<script>` fails to load. This can happen if the rails server hasn't been started
- Updates the logic for testem browsers. Ember CLI always launches testem in "CI" mode, and we don't really want 3 browsers opening by default. Our CI explicitly specifies the 3 browsers at runtime
This is `console.log`'d to the browser console. run-qunit will print this to stdout. testem will not, so a custom reporter is implemented to print this message.
The `--enable-precise-memory-info` is added so that chrome provides high-resolution memory information. This API is not supported by firefox. The logic will degrade gracefully.
This commit sets `tap_failed_tests_only` to `true` in our testem config, so now only the failing tests will show in our GitHub CI Ember test runs, which saves developers from having to hunt through all of the passing tests using GitHub's janky console output scrollback.
* DEV: Use custom tags rather than handlebars server side
These will be skipped if they are ever rendered in a document. The
handlebars really messes stuff up.
* DEV: Build our own locale file for testing purposes
We can't practically proxy everything in test mode, but we can
approximate the logic and build our own locale file for testing purposes
that works quite well. This allows us to run tests without a proxy.
* DEV: Support for testem runner for ember cli tests
