Reject non-finite volume values

src/audio-manager.ts

@@ -182,7 +182,7 @@ export default class AudioManager {
             throw new AudioManagerStateError('Volume control requires volume.enabled to be true.');
         }
 
-        if (volumeInPercent < 0 || volumeInPercent > 100) {
+        if (!Number.isFinite(volumeInPercent) || volumeInPercent < 0 || volumeInPercent > 100) {
             throw new AudioManagerConfigError('Volume must be between 0 and 100 percent.');
         }
 

tests/audio-manager.test.ts

@@ -273,6 +273,11 @@ describe('AudioManager', () => {
 
         expect(() => manager.setVolume(-1)).toThrow(AudioManagerConfigError);
         expect(() => manager.setVolume(101)).toThrow(AudioManagerConfigError);
+        expect(() => manager.setVolume(Number.NaN)).toThrow(AudioManagerConfigError);
+        expect(() => manager.setVolume(Number.POSITIVE_INFINITY)).toThrow(AudioManagerConfigError);
+        expect(() => manager.setVolume(Number.NEGATIVE_INFINITY)).toThrow(AudioManagerConfigError);
+        expect(() => manager.setVolume(0)).not.toThrow();
+        expect(() => manager.setVolume(100)).not.toThrow();
     });
 
     it('rejects volume changes before any resource exists', () => {