[verified] Publish ReelBox source under GPLv3

test/subtitle_webvtt_test.dart

@@ -0,0 +1,116 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:reelbox/media/subtitle_webvtt.dart';
+
+void main() {
+  test('WebVTT drops metadata, STYLE, REGION, NOTE, cue settings and unsafe markup', () {
+    final output = SubtitleWebVtt.convert('''WEBVTT synthetic header
+X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:0
+
+STYLE
+::cue { background-image: url(https://unsafe.invalid/pixel) }
+
+REGION
+id:remote
+
+NOTE private note
+https://unsafe.invalid/note
+
+cue-id
+00:01.250 --> 00:03.000 region:remote align:start
+<b>سلام</b> <img src="https://unsafe.invalid/pixel"><script>bad()</script><style>bad-style</style> &amp; safe
+''');
+    expect(
+      output,
+      'WEBVTT\n\n00:00:01.250 --> 00:00:03.000\nسلام  &amp; safe\n\n',
+    );
+    expect(output, isNot(contains('unsafe.invalid')));
+  });
+  test('SRT cue payload is sanitized, not simply relabelled', () {
+    expect(
+      SubtitleWebVtt.convert(
+        '1\n00:00:00,000 --> 00:00:01,500\n<i>Hello</i> {\\\\an8}<a href="https://unsafe.invalid">friend</a>',
+      ),
+      'WEBVTT\n\n00:00:00.000 --> 00:00:01.500\nHello friend\n\n',
+    );
+  });
+  for (final timing in [
+    '00:61:00,000 --> 01:02:00,000',
+    '00:00:61,000 --> 00:02:00,000',
+    '00:00:03,000 --> 00:00:01,000',
+    '00:00:01,000 --> 00:00:01,000',
+    '-00:00:01,000 --> 00:00:02,000',
+  ]) {
+    test('rejects invalid cue timing $timing', () {
+      expect(
+        () => SubtitleWebVtt.convert('1\n$timing\nSynthetic'),
+        throwsFormatException,
+      );
+    });
+  }
+  test('rejects decreasing cue starts but permits overlapping cues', () {
+    expect(
+      () => SubtitleWebVtt.convert(
+        '1\n00:00:02,000 --> 00:00:04,000\na\n\n2\n00:00:01,000 --> 00:00:03,000\nb',
+      ),
+      throwsFormatException,
+    );
+    expect(
+      SubtitleWebVtt.convert(
+        '1\n00:00:01,000 --> 00:00:04,000\na\n\n2\n00:00:02,000 --> 00:00:03,000\nb',
+      ),
+      contains('00:00:02.000 --> 00:00:03.000'),
+    );
+  });
+  for (final unsupported in [
+    '',
+    '<tt><body>TTML is not supported</body></tt>',
+    'plain arbitrary text',
+    'WEBVTT\n\nSTYLE\n::cue {color:red}',
+  ]) {
+    test('rejects empty/unsupported input honestly: $unsupported', () {
+      expect(() => SubtitleWebVtt.convert(unsupported), throwsFormatException);
+    });
+  }
+  test('rejects invalid ASS time and drawing-mode dialogue', () {
+    for (final body in [
+      'Dialogue: 0,0:99:01.00,0:99:02.00,text',
+      r'Dialogue: 0,0:00:01.00,0:00:02.00,{\p1}m 1 1 l 2 2',
+    ]) {
+      expect(
+        () => SubtitleWebVtt.convert(
+          '[Script Info]\n[Events]\nFormat: Layer, Start, End, Text\n$body',
+        ),
+        throwsA(anyOf(isA<FormatException>(), isA<UnsupportedError>())),
+      );
+    }
+  });
+  for (final format in ['ASS', 'SSA']) {
+    test('synthetic $format uses Events format and dialogue, never styles/fonts', () {
+      final fields = format == 'ASS'
+          ? 'Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text'
+          : 'Marked, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text';
+      final output = SubtitleWebVtt.convert('''[Script Info]
+Title: Synthetic only
+[V4+ Styles]
+Format: Name, Fontname
+Style: Default,https://unsafe.invalid/font
+[Events]
+Format: $fields
+Dialogue: 0,0:00:01.25,0:00:03.00,Default,,0,0,0,,{\\b1}سلام\\Nworld, again{\\b0}
+''');
+      expect(
+        output,
+        'WEBVTT\n\n00:00:01.250 --> 00:00:03.000\nسلام\nworld, again\n\n',
+      );
+      expect(output, isNot(contains('unsafe.invalid')));
+    });
+  }
+  test('synthetic SRT becomes actual WebVTT while preserving Persian text', () {
+    expect(
+      SubtitleWebVtt.convert(
+        '\ufeff1\r\n00:00:01,250 --> 00:00:03,000\r\nسلام دنیا\r\n',
+      ),
+      'WEBVTT\n\n00:00:01.250 --> 00:00:03.000\nسلام دنیا\n\n',
+    );
+  });
+}