feat(note): add bindings and api

test/note_test.dart

@@ -0,0 +1,97 @@
+import 'dart:io';
+import 'package:test/test.dart';
+import 'package:libgit2dart/libgit2dart.dart';
+import 'helpers/util.dart';
+
+void main() {
+  late Repository repo;
+  late Directory tmpDir;
+  const notesExpected = [
+    {
+      'id': 'd854ba919e1bb303f4d6bb4ca9a15c5cab2a2a50',
+      'message': 'Another note\n',
+      'annotatedId': '78b8bf123e3952c970ae5c1ce0a3ea1d1336f6e8',
+    },
+    {
+      'id': 'd2ffe6b06b11dd90c2ee3f15d2c6b62f018554ed',
+      'message': 'Note for HEAD\n',
+      'annotatedId': '821ed6e80627b8769d170a293862f9fc60825226',
+    },
+  ];
+
+  setUp(() async {
+    tmpDir = await setupRepo(Directory('test/assets/testrepo/'));
+    repo = Repository.open(tmpDir.path);
+  });
+
+  tearDown(() async {
+    repo.free();
+    await tmpDir.delete(recursive: true);
+  });
+
+  group('Note', () {
+    test('returns list of notes', () {
+      final notes = repo.notes;
+
+      expect(notes.length, 2);
+
+      for (var i = 0; i < notes.length; i++) {
+        expect(notes[i].id.sha, notesExpected[i]['id']);
+        expect(notes[i].message, notesExpected[i]['message']);
+        expect(notes[i].annotatedId.sha, notesExpected[i]['annotatedId']);
+      }
+
+      for (var note in notes) {
+        note.free();
+      }
+    });
+
+    test('successfully lookups note', () {
+      final head = repo.head;
+      final note = repo.lookupNote(annotatedId: head.target);
+
+      expect(note.id.sha, notesExpected[1]['id']);
+      expect(note.message, notesExpected[1]['message']);
+      expect(note.annotatedId.sha, notesExpected[1]['annotatedId']);
+
+      note.free();
+      head.free();
+    });
+
+    test('successfully creates note', () {
+      final signature = repo.defaultSignature;
+      final head = repo.head;
+      final noteOid = repo.createNote(
+        author: signature,
+        committer: signature,
+        object: head.target,
+        note: 'New note for HEAD',
+        force: true,
+      );
+      final noteBlob = repo[noteOid.sha] as Blob;
+
+      expect(noteOid.sha, 'ffd6e2ceaf91c00ea6d29e2e897f906da720529f');
+      expect(noteBlob.content, 'New note for HEAD');
+
+      noteBlob.free();
+      head.free();
+      signature.free();
+    });
+
+    test('successfully removes note', () {
+      final signature = repo.defaultSignature;
+      final head = repo.head;
+      final note = repo.lookupNote(annotatedId: head.target);
+
+      note.remove(author: signature, committer: signature);
+      expect(
+        () => repo.lookupNote(annotatedId: head.target),
+        throwsA(isA<LibGit2Error>()),
+      );
+
+      note.free();
+      head.free();
+      signature.free();
+    });
+  });
+}