99 lines
3.1 KiB
Dart
99 lines
3.1 KiB
Dart
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import 'dart:convert';
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import 'dart:ui' as ui;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:halkyon_ui/halkyon_ui.dart';
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import 'package:halkyon_ui_example/main.dart';
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import 'package:material_ui/material_ui.dart';
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/// How many pixels [text] inks in [family] at [weight]: heavier strokes ink
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/// more.
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Future<int> ink(String text, String family, FontWeight weight) async {
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final painter = TextPainter(
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text: TextSpan(
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text: text,
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style: TextStyle(
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fontFamily: family,
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fontSize: 40,
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fontWeight: weight,
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color: const Color(0xFF000000),
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),
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),
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textDirection: TextDirection.ltr,
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)..layout();
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final recorder = ui.PictureRecorder();
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painter.paint(Canvas(recorder), Offset.zero);
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final image = await recorder.endRecording().toImage(
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painter.width.ceil(),
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painter.height.ceil(),
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);
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final pixels = (await image.toByteData())!;
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var inked = 0;
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for (var alpha = 3; alpha < pixels.lengthInBytes; alpha += 4) {
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if (pixels.getUint8(alpha) > 128) {
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inked++;
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}
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}
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return inked;
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}
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void main() {
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TestWidgetsFlutterBinding.ensureInitialized();
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test("an app finds the package's Noto Sans under the theme's name, and "
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'draws every weight with it', () async {
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final manifest = jsonDecode(
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await rootBundle.loadString('FontManifest.json'),
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) as List<Object?>;
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final noto = manifest.cast<Map<String, Object?>>().singleWhere(
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(font) => font['family'] == appFontFamily,
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);
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final assets = [
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for (final font
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in (noto['fonts']! as List<Object?>).cast<Map<String, Object?>>())
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font['asset']! as String,
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];
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expect(
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assets,
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contains('packages/halkyon_ui/assets/fonts/NotoSans-Variable.ttf'),
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);
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// Loaded as the engine loads an app's fonts as it starts: by the
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// manifest's family and files.
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final loader = FontLoader(appFontFamily);
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for (final asset in assets) {
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loader.addFont(rootBundle.load(asset));
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}
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await loader.load();
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const text = 'Ἀθῆναι Halkyon';
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final regular = await ink(text, appFontFamily, FontWeight.w400);
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final bold = await ink(text, appFontFamily, FontWeight.w700);
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expect(bold, greaterThan(regular * 1.2));
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});
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test("Noto Sans's licence joins the app's licence list", () async {
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registerFontLicenses();
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final notices = [
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await for (final entry in LicenseRegistry.licenses)
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if (entry.packages.contains('Noto Sans')) entry,
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];
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expect(notices, hasLength(1));
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expect(
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notices.single.paragraphs.map((paragraph) => paragraph.text).join(),
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contains('SIL OPEN FONT LICENSE'),
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);
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});
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testWidgets("the app speaks German with the package's texts", (tester) async {
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await tester.pumpWidget(const ExampleApp(locale: Locale('de')));
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expect(find.text('Halkyon'), findsOneWidget);
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expect(find.text('Example'), findsOneWidget);
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await tester.tap(find.text('Delete'));
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await tester.pumpAndSettle();
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expect(find.text('Abbrechen'), findsOneWidget);
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});
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}
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