[Fix] shim: properly install when already present

shim.js

@@ -5,10 +5,10 @@ var define = require('define-properties');
 
 module.exports = function shimObjectHasOwn() {
 	var polyfill = getPolyfill();
-	define(Object, { hasOwn: polyfill }, {
-		values: function testObjectHasOwn() {
-			return Object.hasOwn !== polyfill;
-		}
-	});
+	define(
+		Object,
+		{ hasOwn: polyfill },
+		{ hasOwn: function () { return Object.hasOwn !== polyfill; } }
+	);
 	return polyfill;
 };

test/index.js

@@ -1,17 +1,11 @@
 'use strict';
 
-var hasOwn = require('../');
+var index = require('../');
 var test = require('tape');
 var runTests = require('./tests');
 
 test('as a function', function (t) {
-	t.test('bad array/this value', function (st) {
-		st['throws'](function () { hasOwn(undefined); }, TypeError, 'undefined is not an object');
-		st['throws'](function () { hasOwn(null); }, TypeError, 'null is not an object');
-		st.end();
-	});
-
-	runTests(hasOwn, t);
+	runTests(index, t);
 
 	t.end();
 });

test/index.mjs

@@ -1,21 +1,21 @@
-import parseInt, * as parseIntModule from 'object.hasown';
+import index, * as Module from 'object.hasown';
 import test from 'tape';
 import runTests from './tests.js';
 
 test('as a function', (t) => {
-	runTests(parseInt, t);
+	runTests(index, t);
 
 	t.end();
 });
 
 test('named exports', async (t) => {
 	t.deepEqual(
-		Object.keys(parseIntModule).sort(),
+		Object.keys(Module).sort(),
 		['default', 'shim', 'getPolyfill', 'implementation'].sort(),
 		'has expected named exports',
 	);
 
-	const { shim, getPolyfill, implementation } = parseIntModule;
+	const { shim, getPolyfill, implementation } = Module;
 	t.equal((await import('object.hasown/shim')).default, shim, 'shim named export matches deep export');
 	t.equal((await import('object.hasown/implementation')).default, implementation, 'implementation named export matches deep export');
 	t.equal((await import('object.hasown/polyfill')).default, getPolyfill, 'getPolyfill named export matches deep export');