From 1d84562f77c3b1746e32cc8e9db04361758727da Mon Sep 17 00:00:00 2001
From: Gabriel Allegretti <gallegretti@inf.ufrgs.br>
Date: Thu, 28 Jul 2022 21:58:39 -0300
Subject: [PATCH 1/2] Fix beat removeNote function keeping stringLookup
 reference

---
 src/model/Beat.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/model/Beat.ts b/src/model/Beat.ts
index 0c1866dd9..9ec08724b 100644
--- a/src/model/Beat.ts
+++ b/src/model/Beat.ts
@@ -502,6 +502,9 @@ export class Beat {
         let index: number = this.notes.indexOf(note);
         if (index >= 0) {
             this.notes.splice(index, 1);
+            if (note.isStringed) {
+                this.noteStringLookup.delete(note.string);
+            }
         }
     }
 

From 5b40856356d4f4bdedf0168358715434f356b52b Mon Sep 17 00:00:00 2001
From: Gabriel Allegretti <gallegretti@inf.ufrgs.br>
Date: Sat, 27 Aug 2022 19:31:14 -0300
Subject: [PATCH 2/2] Add tests for Beat

---
 test/model/Beat.test.ts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 test/model/Beat.test.ts

diff --git a/test/model/Beat.test.ts b/test/model/Beat.test.ts
new file mode 100644
index 000000000..203acc057
--- /dev/null
+++ b/test/model/Beat.test.ts
@@ -0,0 +1,25 @@
+import { Note } from '@src/model';
+import { Beat } from '@src/model/Beat';
+
+describe('BeatTests', () => {
+    it('add-stringed-note', () => {
+        const beat = new Beat();
+        const note = new Note();
+        note.string = 2;
+        beat.addNote(note);
+        expect(beat.notes.length).toBe(1);
+        expect(beat.hasNoteOnString(2)).toBe(true);
+        expect(beat.getNoteOnString(2)).toBe(note);
+    });
+
+    it('remove-stringed-note', () => {
+        const beat = new Beat();
+        const note = new Note();
+        note.string = 1;
+        beat.addNote(note);
+        beat.removeNote(note);
+        expect(beat.notes.length).toBe(0);
+        expect(beat.hasNoteOnString(2)).toBe(false);
+        expect(beat.getNoteOnString(2)).toBe(null);
+    });
+});
\ No newline at end of file