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flutter_flutter/packages/flutter_tools/test/widget_preview_scaffold.shard
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Ben Konyi afb13d8bb7
[ Widget Preview ] Add UUID to registered DTD streams and services (#180140) 
DTD only supports a single instance of a registered service with a given
name. For widget preview development, we sometimes want to use a DTD
instance that's attached to an IDE to test IDE integration. However,
IDEs frequently spawn their own widget preview instances which register
services with DTD. In the case where `flutter widget-preview start
--dtd-url=<dtd-url>` is run and `dtd-url` points to a DTD instance with
another widget preview service running, the process simply crashes.

This change adds a unique identifier to the widget preview DTD service
and stream names that allows for each `flutter widget-preview start`
instance to register its own unique widget preview DTD services, even if
other widget preview instances are using the same DTD instance.

Fixes https://github.com/flutter/flutter/issues/179883
2026-01-05 19:52:27 +00:00
..
widget_preview_scaffold
[ Widget Preview ] Add UUID to registered DTD streams and services (#180140)
2026-01-05 19:52:27 +00:00
.gitignore
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README.md
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update_widget_preview_scaffold.dart
[ Tool ] Enable omit_obvious_*_types and specify_nonobvious_*_types lints (#172018)
2025-07-11 19:32:57 +00:00

README.md

Widget Preview Scaffold Testing

This directory contains a hydrated instance of the widget_preview_scaffold project template that's used for generating the environment used by flutter widget-preview start to host Widget Previews, as well as utilities to detect if the hydrated instance is outdated when compared to the template files.

Updating the Hydrated Template

If any of the widget_preview_scaffold template files are updated, widget_preview_scaffold/test/template_change_detection_smoke_test.dart will fail to indicate that the hydrated scaffold needs to be regenerated. To do this, run dart test/widget_preview_scaffold.shard/update_widget_preview_scaffold.dart to regenerate the project.