Akiba So
3e0b81be92
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For library-wide full-text search (the user's #1 named differentiator): snippetFor() finds the first case-insensitive match of a query in a source string (PDF text page / typed box / OCR'd handwriting) and returns a windowed excerpt centered on it, preserving the match offset + length and truncatedStart/End flags so the results list can render "…ctx **match** ctx…" and jump to the hit. The full match is always included; near-edge matches don't over-truncate. Returns null for empty/absent query. The FTS index + ranking live in the DB (search_indexer, later); this is the pure, storage-free excerpt math, fully unit-tested. flutter analyze lib/editor clean; 164/164 tests (+8). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
66 lines
2.2 KiB
Dart
66 lines
2.2 KiB
Dart
// Tests for pure search-snippet extraction (F8).
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import 'package:flutter_test/flutter_test.dart';
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import 'package:badnote/editor/search/search_snippet.dart';
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void main() {
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test('returns null for empty query, empty source, or no match', () {
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expect(snippetFor('hello world', ''), isNull);
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expect(snippetFor('', 'x'), isNull);
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expect(snippetFor('hello world', 'zzz'), isNull);
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});
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test('case-insensitive match, offset preserved within the snippet', () {
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final s = snippetFor('The Quick Brown Fox', 'quick', window: 80)!;
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expect(s.match.toLowerCase(), 'quick');
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expect(s.text.substring(s.matchStart, s.matchStart + s.matchLength),
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'Quick');
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});
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test('short source is returned whole, no truncation', () {
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final s = snippetFor('alpha beta gamma', 'beta', window: 80)!;
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expect(s.text, 'alpha beta gamma');
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expect(s.truncatedStart, isFalse);
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expect(s.truncatedEnd, isFalse);
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expect(s.matchStart, 'alpha '.length);
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});
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test('long source is windowed and truncated on both sides', () {
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final source = '${'a' * 200} needle ${'b' * 200}';
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final s = snippetFor(source, 'needle', window: 40)!;
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expect(s.truncatedStart, isTrue);
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expect(s.truncatedEnd, isTrue);
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expect(s.match, 'needle');
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// Window is ~40 + match; nowhere near the full 400+ source.
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expect(s.text.length, lessThan(80));
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});
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test('match near the start has no leading truncation', () {
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final source = 'needle ${'b' * 200}';
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final s = snippetFor(source, 'needle', window: 40)!;
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expect(s.truncatedStart, isFalse);
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expect(s.matchStart, 0);
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expect(s.truncatedEnd, isTrue);
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});
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test('match near the end has no trailing truncation', () {
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final source = '${'a' * 200} needle';
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final s = snippetFor(source, 'needle', window: 40)!;
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expect(s.truncatedEnd, isFalse);
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expect(s.truncatedStart, isTrue);
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});
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test('the full match is included even when longer than the window', () {
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final long = 'x' * 100;
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final s = snippetFor('pre ${long} post', long, window: 10)!;
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expect(s.match, long);
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expect(s.matchLength, 100);
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});
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test('finds the FIRST occurrence', () {
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final s = snippetFor('cat dog cat', 'cat', window: 80)!;
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expect(s.matchStart, 0);
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});
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}
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