Add more test cases in Array, Object

I understand that searchString is not accepted in RegExp. (TypeError exception)

Throwing an exception if the first argument is a RegExp is specified in order to allow future editions to define extensions that allow such argument values.

But it does accept Array and Object through the method toString under the specification.

which are

// array
['this', 'is', 'an', 'array'].toString(); // => 'this,is,an,array'

// object
({'obj': 'obj'}).toString(); // => '[object Object]'

Therefore, I would like to add more test cases

// array
assertEquals('this,is,an,array').includes(['this', 'is']), true);
assertEquals('this,is,an,array').includes(['this', 'is'], 1), false);
assertEquals('this, is, an, array').includes(['this', 'is']), false);

// object
assertEquals(String.prototype.includes.apply({ 'toString': function () { return '[object Object]'; }}, [{'obj': 'obj'}, 0]),  true);

It’s weird if someone input the array or object to the method includes, but it does support.

Issue 中没有指定测试文件。找到 String.prototype.includes 的现有测试，并将其断言风格与提议的 Array 和 Object 用例进行比较。先运行该测试套件，然后为所示的转换添加覆盖，并验证这些用例通过。