Allow the option to specify render_entry_point() to be a no-op for backend tests

[shangxiao]

render_entry_point() requires a stats file to be present, which may not be the case for various reasons

[davecoates]

Does this need to be an option? Is mocking too onerous? e.g.

    def setUp(self):
        self.patcher = patch("allianceutils.webpack.WebpackEntryPointLoader.get_chunks_for_entry_point")
        self.mocked_render_entry_point = self.patcher.start()

    def tearDown(self):
        self.patcher.stop()

[shangxiao]

The best workaround I found was to add a fake stats file:

{
  "status": "done",
  "entrypoints": {
    "<entry-point-name>": [{"name": "<entry-point-name>"}]
  },
  "publicPath": "http://127.0.0.1/"
}

place it in the frontend/ directory then add this to CI settings:

WEBPACK_LOADER["DEFAULT"]["STATS_FILE"] = PROJECT_DIR / "frontend/webpack-stats-ci.json"

An option to disable is the best DX though. Mocking is the least developer-friendly option.

[davecoates]

This has never come up because builds are always committed, so the stats file used in production is available in CI. Do you not commit builds?