Tests: note.json, the data of each public note and its result

Each of the 16 notes of testdata/vectors/note.json, the cases of the
list of v0.11 of spec section 64, gives the result and the detail of the
reference through checkNoteData, and a reader shows it as publicNote only
when it is ok; otherwise unusableNote says so and StandardExtensions
reports it unusable with ERR_EXTENSION_DATA_INVALID, never the capsule.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/open_note_test.dart

@@ -1,6 +1,7 @@
 // The public note of spec §24.1 against Go: test/vectors/open_notes.json,
 // which tool/open_go_vectors.go writes with extension.CheckNote, Note,
-// Header.UnusableNote and extension.Standard of the reference.
+// Header.UnusableNote and extension.Standard of the reference; and
+// testdata/vectors/note.json, the cases of the list of v0.11 of spec §64.
 @TestOn('vm')
 library;
 
@@ -28,6 +29,44 @@ void main() {
     );
   });
 
+  test('note.json: the data of each note and the result of its rules', () {
+    final f = readJson('testdata/vectors/note.json');
+    expect(f['spec'], specVersion);
+    final notes = (f['notes']! as List).cast<Json>();
+    expect(notes, hasLength(16));
+    expect(notes.where((c) => c['result'] == 'ok'), hasLength(4));
+    for (final c in notes) {
+      final data = fromHex(c['data']! as String);
+      final reason = c['name'] as String?;
+      // detail is the text of the rule, without the code.
+      final want = c['result'] == 'ok'
+          ? ['ok', '']
+          : [c['result'], '${c['detail']}: ${c['result']}'];
+      String? text;
+      expect(outcomeOf(() => text = checkNoteData(data)), want, reason: reason);
+      // A reader shows the note only when it is ok, and otherwise treats it
+      // as unusable, never the capsule (spec §54).
+      final exts = [Extension(noteExtensionId, 1, data.isEmpty ? null : data)];
+      expect(
+        [publicNote(exts), unusableNote(exts)],
+        c['result'] == 'ok' ? [text, false] : [null, true],
+        reason: reason,
+      );
+      expect(
+        [
+          for (final u in checkNoncritical(
+            exts,
+            const StandardExtensions(),
+            ExtensionObject.publicHeader,
+          ))
+            u.error.code.code,
+        ],
+        c['result'] == 'ok' ? isEmpty : [c['result']],
+        reason: reason,
+      );
+    }
+  });
+
   test('the note of a header, as PublicNote and UnusableNote of Go', () {
     final r = jsonDecode(
       File('testdata/fixtures/time_only_extensions.json').readAsStringSync(),