fix: format

test/test.mjs

@@ -0,0 +1,35 @@
+import test from 'ava';
+import isPlainObj from 'is-plain-obj';
+import {ESLint} from 'eslint';
+
+const hasRule = (errors, ruleId) => errors.some(error => error.ruleId === ruleId);
+
+async function runEslint(string, config) {
+	const eslint = new ESLint({
+		useEslintrc: false,
+		overrideConfig: config,
+	});
+
+	const [firstResult] = await eslint.lintText(string);
+
+	return firstResult.messages;
+}
+
+test('main', async t => {
+	const config = require('../index.js');
+
+	t.true(isPlainObj(config));
+	t.true(isPlainObj(config.rules));
+
+	const errors = await runEslint('\'use strict\';\nconsole.log("unicorn")\n', config);
+	t.true(hasRule(errors, 'quotes'), JSON.stringify(errors));
+});
+
+test('browser', async t => {
+	const config = require('../browser.js');
+
+	t.true(isPlainObj(config));
+
+	const errors = await runEslint('\'use strict\';\nprocess.exit();\n', config);
+	t.true(hasRule(errors, 'no-undef'), JSON.stringify(errors));
+});