Question: doValidation doesn't diagnose trailing comma about vscode-json-languageservice HOT 2 CLOSED

		const text = '{ "pages": [  "pages/index", "pages/log", ] }';

		const ls = getLanguageService({});
		const textDoc = TextDocument.create('foo://bar/file.json', 'json', 0, text);
		const jsonDoc = ls.parseJSONDocument(textDoc)

		const res = await ls.doValidation(textDoc, jsonDoc);
		assert.strictEqual(res.length, 1);
		assert.strictEqual(res[0].message, 'Trailing comma');

		const res2 = await ls.doValidation(textDoc, jsonDoc, { trailingCommas: 'error' });
		assert.strictEqual(res.length, 1);
		assert.strictEqual(res[0].message, 'Trailing comma');

		const res3 = await ls.doValidation(textDoc, jsonDoc, { trailingCommas: 'ignore' });
		assert.strictEqual(res3.length, 0);