Japanese fonts for flutter apps.
By default, flutter test uses the font called Ahem that simply shows spaces, makes golden tests less valuable. flutter_fonts_jp provides Japanese fonts for testing.
First, add flutter_fonts_jp to dev_dependencies:
# pubspec.yaml
dev_dependences:
flutter_fonts_jp:
Next, make sure that flutter.assets in pubspec.yaml contains at least one file/directory. This is required to tells flutter to bundle fonts. If you app does not use any assets, add a dummy (empty) directory.
# pbuspec.yaml
flutter:
assets:
- images/
Lastly call loadJapaneseFont in tests.
testWidgets('golden test', (WidgetTester tester) async {
await loadJapaneseFont();
await tester.pumpWidget(App());
await expectLater(find.byType(App), matchesGoldenFile('app.png'));
});
A golden file look something like this (it uses the real font instead of the blank one).
Golden files can differ based on flutter version or platform flutter/flutter#36667. We use linux and the latest stable flutter version for golden files.