feat: add bark battle browser prototype

src/games/bark-battle/domain/__tests__/BarkDetector.test.ts

@@ -0,0 +1,62 @@
+import { describe, expect, it } from 'vitest';
+
+import { DEFAULT_BARK_BATTLE_CONFIG } from '../../application/BarkBattleConfig';
+import { BarkDetector } from '../BarkDetector';
+
+describe('BarkDetector', () => {
+  it('超过阈值且持续时长合规时只计为一次有效叫声', () => {
+    const detector = new BarkDetector({
+      threshold: 0.45,
+      minBarkGapMs: DEFAULT_BARK_BATTLE_CONFIG.minBarkGapMs,
+      minBarkDurationMs: 90,
+      maxBarkDurationMs: 900,
+    });
+
+    expect(detector.acceptSample({ atMs: 0, volume: 0.2 })).toEqual([]);
+    expect(detector.acceptSample({ atMs: 40, volume: 0.72 })).toEqual([]);
+    expect(detector.acceptSample({ atMs: 150, volume: 0.76 })).toEqual([]);
+    const events = detector.acceptSample({ atMs: 180, volume: 0.2 });
+
+    expect(events).toHaveLength(1);
+    expect(events[0]).toMatchObject({ side: 'player', peakVolume: 0.76 });
+    expect(events[0]?.durationMs).toBe(140);
+  });
+
+  it('持续噪音不会在每个 tick 无限计数', () => {
+    const detector = new BarkDetector({
+      threshold: 0.4,
+      minBarkGapMs: 250,
+      minBarkDurationMs: 80,
+      maxBarkDurationMs: 600,
+    });
+
+    const allEvents = [
+      ...detector.acceptSample({ atMs: 0, volume: 0.7 }),
+      ...detector.acceptSample({ atMs: 100, volume: 0.72 }),
+      ...detector.acceptSample({ atMs: 200, volume: 0.73 }),
+      ...detector.acceptSample({ atMs: 300, volume: 0.75 }),
+      ...detector.acceptSample({ atMs: 500, volume: 0.2 }),
+    ];
+
+    expect(allEvents).toHaveLength(1);
+  });
+
+  it('低于阈值的背景噪音、过短脉冲和冷却内峰值不计数', () => {
+    const detector = new BarkDetector({
+      threshold: 0.5,
+      minBarkGapMs: 300,
+      minBarkDurationMs: 80,
+      maxBarkDurationMs: 800,
+    });
+
+    expect(detector.acceptSample({ atMs: 0, volume: 0.48 })).toEqual([]);
+    detector.acceptSample({ atMs: 20, volume: 0.9 });
+    expect(detector.acceptSample({ atMs: 60, volume: 0.2 })).toEqual([]);
+
+    detector.acceptSample({ atMs: 500, volume: 0.88 });
+    expect(detector.acceptSample({ atMs: 620, volume: 0.2 })).toHaveLength(1);
+
+    detector.acceptSample({ atMs: 700, volume: 0.9 });
+    expect(detector.acceptSample({ atMs: 820, volume: 0.2 })).toEqual([]);
+  });
+});