fix: calculate chart scores with song formulas and hidden note weights

scripts/sus-score-weight.test.mjs

@@ -0,0 +1,37 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { susScoreWeight } from './sus-score-weight.mjs';
+
+const text = `#MUSIC_ID m0001
+#FULL_COMBO_NOTE_COUNT 7
+#TOTAL_NOTE_COUNT 7
+#NORMAL_NOTE_COUNT 1
+#FLICK_NOTE_COUNT 1
+#LONG_START_NOTE_COUNT 1
+#LONG_END_NOTE_COUNT 0
+#LONG_FLICK_END_NOTE_COUNT 1
+#LONG_RELAY_NOTE_COUNT 1
+#LONG_CONTINUE_NOTE_COUNT 2
+#DAMAGE_NOTE_COUNT 0
+#GHOST_NOTE_COUNT 0
+#000320:140x0K3454
+#000320:0xft4424
+#00052:1c
+`;
+test('비가시·베지어는 분모에만 포함하고 끝 플릭은 1000으로 집계한다', () => {
+  const result = susScoreWeight(text);
+  assert.equal(result.fullComboNoteCount, 7);
+  assert.equal(result.baseWeight, 4350);
+  assert.equal(result.invisibleRelayCount, 1);
+  assert.equal(result.bezierPointCount, 1);
+  assert.equal(result.perfectNoteWeight, 4550);
+});
+test('잘린 토큰·미지원 종류·헤더 불일치는 잘못된 분모 대신 실패한다', () => {
+  for (const changed of [text.replace('0xft', '0x!t'), text + '#001320:4', text + '#001320:64', text.replace('LONG_START_NOTE_COUNT 1', 'LONG_START_NOTE_COUNT 2')]) {
+    assert.throws(() => susScoreWeight(changed));
+  }
+});
+test('고스트 가이드는 총 오브젝트 수에는 포함하지만 점수 분모에는 포함하지 않는다', () => {
+  const withGhost = text.replace('GHOST_NOTE_COUNT 0', 'GHOST_NOTE_COUNT 2').replace('TOTAL_NOTE_COUNT 7', 'TOTAL_NOTE_COUNT 9');
+  assert.equal(susScoreWeight(withGhost).perfectNoteWeight, 4550);
+});