chain-studio/test/chain_log_test.dart
flemming-it 891acd2ba2
Some checks failed
Security / Security check (push) Failing after 2s
refactor: rename internal Fai* design system + fai_ helpers to chain
The Studio design system, widgets and helpers carried a Fai* / fai_
prefix (FaiSpace, FaiColors, FaiTheme, FaiLog, 17 fai_*.dart files, the
faiBinary* l10n keys). Studio is the Ch∆In product, so rename them to
Chain* / chain_ — carefully preserving English fail/failure/failed.
Also fix stale references: the 'fai' binary in l10n strings -> 'chain',
FAI_* env vars (FAI_BIN/DATA_DIR/MODULES_DIR/TODAY/BOOTSTRAP_TOKEN) ->
CHAIN_*, fai_platform -> fai_chain, fai_hub -> chain_hub. Vendor
security-hook tooling (FAI_BANNED_TERMS_FILE) + the .fai bundle ext left.
flutter analyze + test: clean (20 passed).

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>
2026-06-16 17:53:17 +02:00

103 lines
3.7 KiB
Dart

// Unit tests for ChainLog — the central error log that
// `~/.fai/logs/studio-errors.log` is the operator-visible
// surface of. The tests redirect the singleton at a temp file
// via `ChainLog.testPathOverride` so the real log under HOME is
// never touched.
import 'dart:convert';
import 'dart:io';
import 'package:chain_studio/data/chain_log.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
group('ChainLog', () {
late Directory tmp;
late File logFile;
setUp(() {
tmp = Directory.systemTemp.createTempSync('chain_log_test_');
logFile = File('${tmp.path}/studio-errors.log');
ChainLog.testPathOverride = logFile.path;
});
tearDown(() {
ChainLog.testPathOverride = null;
try {
tmp.deleteSync(recursive: true);
} catch (_) {/* best-effort */}
});
test('append writes one JSON-shaped line per event', () async {
await ChainLog.instance.error('flows.run', 'boom');
final lines = await ChainLog.instance.tail();
expect(lines, hasLength(1));
final entry = jsonDecode(lines.single) as Map<String, Object?>;
expect(entry['source'], 'flows.run');
expect(entry['error'], 'boom');
expect(entry['level'], 'error');
expect(entry['ts'], isA<String>());
});
test('context field is preserved when supplied', () async {
await ChainLog.instance.error(
'theme.plugin.load',
Exception('endpoint unreachable'),
context: 'capability=studio.theme.space',
);
final lines = await ChainLog.instance.tail();
final entry = jsonDecode(lines.single) as Map<String, Object?>;
expect(entry['context'], 'capability=studio.theme.space');
expect(entry['error'], contains('endpoint unreachable'));
});
test('tail returns oldest first', () async {
await ChainLog.instance.error('a', '1');
await ChainLog.instance.error('b', '2');
await ChainLog.instance.error('c', '3');
final lines = await ChainLog.instance.tail();
expect(lines, hasLength(3));
final sources = lines.map((l) => jsonDecode(l)['source']).toList();
expect(sources, ['a', 'b', 'c']);
});
test('tail caps output at maxLines and keeps the newest', () async {
for (var i = 0; i < 20; i++) {
await ChainLog.instance.error('burst', 'event-$i');
}
final lines = await ChainLog.instance.tail(maxLines: 5);
expect(lines, hasLength(5));
final last = jsonDecode(lines.last) as Map<String, Object?>;
expect(last['error'], 'event-19');
});
test('rotation moves the live log to .log.1 past 256 KiB', () async {
// Pre-seed the active log just over the cap. The next
// append should rotate, leaving the rotated file at
// `.log.1` and a short fresh `.log`.
logFile.parent.createSync(recursive: true);
logFile.writeAsBytesSync(List.filled(257 * 1024, 0x20));
await ChainLog.instance.error('rotation', 'after-cap');
expect(File('${logFile.path}.1').existsSync(), isTrue);
final newSize = logFile.lengthSync();
expect(newSize, lessThan(2 * 1024));
final newText = logFile.readAsStringSync();
expect(newText, contains('"source":"rotation"'));
});
test('path getter returns the override when set', () {
expect(ChainLog.instance.path, logFile.path);
});
test('writes failing silently does not throw', () async {
// Redirect to a deliberately impossible path. The error()
// call must complete cleanly; the operator UI must never
// crash because the disk is full / read-only / missing.
ChainLog.testPathOverride = '/this/path/does/not/exist/ever/x.log';
await expectLater(
ChainLog.instance.error('bad.path', 'boom'),
completes,
);
});
});
}