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This PR creates a new class `RoundedSuperellipseBorder`, which is the main way to draw a rounded superellipse with filling and/or stroking. The new class is very similar to `RoundedRectangleBorder` and shares a lot of private code, therefore they reside in the same file. For demonstration purposes, the rounded superellipse is also applied to `CupertinoActionSheet`, whose cancel button was drawn with the border class. https://github.com/user-attachments/assets/39599dcf-5cf1-46e1-ab34-8c477cbef9d4 (Sadly this demo wouldn't fit for dartpad because rounded superellipses are not yet supported on Web.) ## Pre-launch Checklist - [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [ ] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [ ] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [ ] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
Tests for the Cupertino package
Avoid importing the Material 'package:flutter/material.dart' in these tests as we're trying to test the Cupertino package in standalone scenarios.
The 'material' subdirectory contains tests for cross-interactions of Material Cupertino widgets in hybridized apps.
Some tests may also be replicated in the Material tests when Material reuses Cupertino components on iOS such as page transitions and text editing.