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flutter_flutter/engine/src/flutter/shell/platform/android/test
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Bruno Leroux fbed8a7194
Add support for language hints in TextFields (Android only) (#165554) 
## Description

This PR adds support for language hints in TextFields.
This is supported only on Android for the moment and the property name,
aka `TextField.hintLocales`, is based on Android's
`EditorInfo.hintLocales` property, see
https://developer.android.com/reference/android/view/inputmethod/EditorInfo#hintLocales.

## Related Issue

Fixes [Support for language hints in
TextFields](https://github.com/flutter/flutter/issues/163698)

## Tests

Adds 4 tests.
Updates several tests.
2025-04-17 10:58:38 +00:00
..
io/flutter
Add support for language hints in TextFields (Android only) (#165554)
2025-04-17 10:58:38 +00:00
README.md
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README.md

Unit testing Java code

All Java code in the engine should now be able to be tested with Robolectric 4.12.1 and JUnit 4. The test suite has been added after the bulk of the Java code was first written, so most of these classes do not have existing tests. Ideally code after this point should be tested, either with unit tests here or with integration tests in other repos.

Adding a new test

  1. Create a file under test/ matching the path and name of the class under test. For example, shell/platform/android/io/flutter/util/Preconditions.java -> shell/platform/android/**test**/io/flutter/util/Preconditions**Test**.java.
  2. Add your file to the sources of the robolectric_tests build target in /shell/platform/android/BUILD.gn. This compiles the test class into the test jar.
  3. Import your test class and add it to the @SuiteClasses annotation in FlutterTestSuite.java. This makes sure the test is actually executed at run time.
  4. Write your test.
  5. Build and run with testing/run_tests.py [--type=java] [--java-filter=<test_class_name>].

Example: from engine/src/flutter on a Mac et build -c android_debug_unopt_arm64 testing/run_tests.py --android-variant=android_debug_unopt_arm64 --type=java --java-filter=io.flutter.embedding.android.FlutterViewTest

Note that testing/run_tests.py does not build the engine binaries; instead they should be built prior to running this command and also when the source files change. See Compiling the engine for details on how to do so.

Q&A

My new test won't run. There's a "ClassNotFoundException".

See Updating Embedding Dependencies.

My new test won't compile. It can't find one of my imports.

See Updating Embedding Dependencies.

My test does not show log output in the console

Import org.robolectric.shadows.ShadowLog; then Use ShadowLog.stream = System.out; in your test or setup method.