[material_ui] Port routes_transition_test to material_ui - #12634

flutter/packages@7a7912f...18fe786

2026-09-02 [email protected]
[path_parsing] Fix deprecation lints (flutter/packages#12704)
2026-09-02 [email protected] [material_ui] Use super parameters in
more places (flutter/packages#12460)
2026-09-02 [email protected] [material_ui] Add
a README and placeholders for migrating gen_defaults templates
(flutter/packages#12714)
2026-09-01 [email protected] [image_picker] Add native tests
for image, metadata, photo-asset, and PHPicker save utilities
(flutter/packages#12536)
2026-09-01 [email protected] [material_ui] Port routes_transition_test
to material_ui (flutter/packages#12634)
2026-09-01 [email protected] Roll Flutter from
c8c5e3b to 0cbd1a4 (23 revisions) (flutter/packages#12712)
2026-09-01 [email protected]
[material_ui] Remove !chrome in text_field_test.dart
(flutter/packages#12548)

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Ports routes_transition_test.dart from flutter/flutter to material_ui. 
The original test is removed separately in flutter/flutter#186620 and added here to preserve its Material navigation transition coverage.

Part of [flutter/flutter#177414.](flutter/flutter#188444)
Related to [flutter/flutter#188444.](flutter/flutter#186620)

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Ports routes_transition_test.dart from flutter/flutter to material_ui. 
The original test is removed separately in flutter/flutter#186620 and added here to preserve its Material navigation transition coverage.

Part of [flutter/flutter#177414.](flutter/flutter#188444)
Related to [flutter/flutter#188444.](flutter/flutter#186620)

## Pre-Review Checklist

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The test now lives in material_ui (flutter/packages#12634). Remove its obsolete cross-import exception as well.

Part of flutter#177414

The test now lives in material_ui (flutter/packages#12634). Remove its obsolete cross-import exception as well.

Part of flutter#177414

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Removes `routes_transition_test.dart` from `flutter/flutter`. The test
will be added to `material_ui` in `flutter/packages` in [this
pr](flutter/packages#12634)

Part of flutter#177414.
Related to flutter#188444.

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