RegExp.test（）区分单引号和双引号？

Question

我从RegExp.test（）和RegExp.match（）得到不同的结果，这取决于我是用单引号还是双引号定义要测试的字符串。解释器认为字符串是相同的，但RegExp匹配用单引号定义的字符串而不是另一个。怎么可能呢？

var str1 = 'abc';
var str2 = "abc";

var re = /abc/g;

console.log('test of str1 === str2:');
console.log(str1 === str2);  // Is true, as expected.

console.log('test single quotes defined string:');
console.log(re.test(str1));  // Is true, as expected.

console.log('test double quotes defined string: ');
console.log(re.test(str2));  // Is false! But str1 === str2!