Better property comparison test

test/window-properties-should-be-as-expected.js

@@ -5,6 +5,5 @@ import expectedProperties from './fixtures/expectedProperties';
 test(t => {
 	browserEnv();
 	const properties = Object.getOwnPropertyNames(window);
-	t.is(properties.length, expectedProperties.length);
+	t.deepEqual(expectedProperties.sort(), properties.sort());
-	properties.forEach(prop => t.true(expectedProperties.indexOf(prop) > -1));
 });