add player tests

1 files changed, 20 insertions, 0 deletions

diff --git a/player-tests.mjs b/player-tests.mjs
new file mode 100644
index 0000000..e2ba42f
--- /dev/null
+++ b/player-tests.mjs
@@ -0,0 +1,20 @@
+import { Note, toCents } from './scale.mjs';
+
+export default function() {
+    const cNote = Note.fromString('C');
+    console.assert(cNote.distanceTo(cNote) === 0);
+    const dNote = Note.fromString('D');
+    console.assert(cNote.distanceTo(dNote) === 2);
+    const dSharpNote = Note.fromString('D♯');
+    console.assert(cNote.distanceTo(dSharpNote) === 3);
+
+    const aNote = Note.fromString('A', 'A to A');
+    console.assert(toCents([aNote, 4], [aNote, 3]) === -1200);
+    const bNote = Note.fromString('B');
+    console.assert(toCents([aNote, 4], [bNote, 4]) == 200, 'A4 to B4 is 200 cents');
+    // E F F# G G# A
+    const eNote = Note.fromString('E');
+    console.assert(toCents([aNote, 4], [eNote, 4]) === -500, 'E4 is 500 cents lower than A4');
+
+    console.assert(toCents([aNote, 4], [bNote, 3]) === -1000, 'A4 to B3 is 100 cents above -1200');
+}