Files
clide/test/terminal/painter_bold_metrics_test.dart
T
jpmschweitzerandClaude Opus 4.8 6d0ebab721 chore: adopt Dart 3.9 toolchain — honest floor + tall-style reformat (T-353)
Raise the declared minimums in pubspec.yaml to what our deps already
require: Flutter >=3.35.0 / Dart >=3.9.0 (was 3.19.0 / 3.5.0). alchemist
0.12 needs Flutter 3.32; Dart 3.9 first ships in Flutter 3.35, so 3.35 is
the binding floor. Pin the exact build toolchain in .fvmrc (Flutter
3.44.1).

Moving to the Dart 3.9 language level switches `dart format` to the new
"tall" style and enables two new lints. This commit is the resulting
mechanical churn, isolated from any behaviour change:
  - whole-tree `dart format` reformat (tall style)
  - `dart fix` for unnecessary_underscores + use_null_aware_elements

No runtime behaviour change; `make test` green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-11 12:11:53 +02:00

53 lines
1.9 KiB
Dart

/// Verifies that the bundled JetBrainsMono Bold face has identical
/// advance widths to Regular at our render size — required for the
/// terminal cell grid to stay stable when bold attributes flip on.
///
/// If this fails, the workaround in painter.dart was deactivated
/// against a font that drifts; pick one of the alternatives in T-73
/// (variable JetBrainsMono / Berkeley Mono / IBM Plex Mono).
library;
import 'dart:io';
import 'dart:ui' as ui;
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
const _family = 'JetBrainsMonoTest';
const _fontSize = 14.0;
const _sample = 'mmmmmmmmmm';
void main() {
setUpAll(() async {
final regular = await File('assets/fonts/jetbrains_mono/JetBrainsMono-Regular.ttf').readAsBytes();
final bold = await File('assets/fonts/jetbrains_mono/JetBrainsMono-Bold.ttf').readAsBytes();
final loader = FontLoader(_family)
..addFont(Future.value(ByteData.sublistView(regular)))
..addFont(Future.value(ByteData.sublistView(bold)));
await loader.load();
});
test('JetBrainsMono Bold advance width matches Regular (cell drift = 0)', () {
final regularWidth = _measure(FontWeight.normal);
final boldWidth = _measure(FontWeight.bold);
expect(
boldWidth,
regularWidth,
reason:
'Bold advance width must equal Regular at $_fontSize px '
'or the terminal cell grid drifts when bold flips on.',
);
});
}
double _measure(FontWeight weight) {
final builder = ui.ParagraphBuilder(ui.ParagraphStyle(fontFamily: _family, fontSize: _fontSize))
..pushStyle(ui.TextStyle(fontFamily: _family, fontWeight: weight, fontSize: _fontSize))
..addText(_sample);
final paragraph = builder.build()..layout(const ui.ParagraphConstraints(width: double.infinity));
final width = paragraph.maxIntrinsicWidth;
paragraph.dispose();
return width;
}