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The `theme` parameter of `Preview(...)` allows for developers to provide a callback that returns a `PreviewThemeData` instance which can contain theming data for Material and Cupertino widgets in both light and dark modes. The provided theme data will be injected into the widget tree and applied to the previewed widget. The `brightness` parameter allows for developers to specify an initial brightness setting (e.g., light vs dark mode) for the previewed widget. If not provided, the current system default is used. A new button has also been added to each widget preview card that allows for toggling between light and dark mode for individual previews. **Demo:** https://github.com/user-attachments/assets/f0a4a3bc-25d2-49b0-a5f6-9149eccfc1d4 Fixes https://github.com/flutter/flutter/issues/166436 Fixes https://github.com/flutter/flutter/issues/166275 Fixes https://github.com/flutter/flutter/issues/166279 Fixes https://github.com/flutter/flutter/issues/166437
Flutter Web integration tests
To run the tests in this package download the chromedriver matching the version of Chrome. To find out the version of your Chrome installation visit chrome://version.
Start chromedriver using the following command:
chromedriver --port=4444
An integration test is run using the flutter drive command. Some tests are
written for a specific web renderer and/or specific build mode.
Before running a test, check the _runWebLongRunningTests function defined in
dev/bots/test.dart, and determine the right web renderer and the build
mode you'd like to run the test in.
Here's an example of running an integration test:
flutter drive --target=test_driver/text_editing_integration.dart \
-d web-server \
--browser-name=chrome \
--profile
This example runs the test in profile mode (--profile).
More resources:
- chromedriver: https://chromedriver.chromium.org/getting-started
- FlutterDriver: https://github.com/flutter/flutter/blob/main/docs/contributing/testing/Running-Flutter-Driver-tests-with-Web.md
package:integration_test: https://pub.dev/packages/integration_test