[AI-generated] Fix unhandled rejection when disposing invalid input (#413)

* Fix input dispose rejection handling

* Move input disposal regression test

test/node/input.test.ts

@@ -0,0 +1,28 @@
+import { expect, test } from 'vitest';
+import { Input, UnsupportedInputFormatError } from '../../src/input.js';
+import { ALL_FORMATS } from '../../src/input-format.js';
+import { BufferSource } from '../../src/source.js';
+
+test('Disposing after failed format detection does not emit an unhandled rejection', async () => {
+	const input = new Input({
+		source: new BufferSource(new Uint8Array([1, 2, 3, 4])),
+		formats: ALL_FORMATS,
+	});
+
+	await expect(input.getFormat()).rejects.toThrow(UnsupportedInputFormatError);
+
+	const unhandledRejections: unknown[] = [];
+	const onUnhandledRejection = (reason: unknown) => {
+		unhandledRejections.push(reason);
+	};
+
+	process.on('unhandledRejection', onUnhandledRejection);
+	try {
+		input.dispose();
+		await new Promise(resolve => setTimeout(resolve, 0));
+	} finally {
+		process.off('unhandledRejection', onUnhandledRejection);
+	}
+
+	expect(unhandledRejections).toEqual([]);
+});