我尝试创建一个函数，它接受一个许可证代码，然后返回一个link元素，其中包含正确的许可证代码和描述，我似乎找不出代码中哪里出错了，但我猜是if语句。
这是我得到的

function generateLicenseLink(licenseCode) {
  let code = licenseCode.replace("CC-", "").toLowerCase();
  let codeToTest = code.split(/-{3}/);
  let test = codeToTest;
  let codeShort;
  let codeLong;

  let link = `<a href ="https://creativecommons.org/licenses/${codeShort}/4.0/>${codeLong}</a>`;

  if (test === "by") {
    codeShort = "by";
    codeLong = "Creative Commons Attribution License";
  }

  else if (test === "by-nc") {
    codeShort = "by-nc";
    codeLong = "Creative Commons Attribution-NonCommercial License";
  }

  else if (test === "by-sa") {
    codeShort = "by-sa";
    codeLong = "Creative Commons Attribution-ShareAlike License";
  }

  else if (test === "by-nd") {
    codeShort = "by-nd";
    codeLong = "Creative Commons Attribution-NoDerivs License";
  }

  else if (test === "by-nd-sa") {
    codeShort = "by-nd-sa";
    codeLong = "Creative Commons Attribution-NonCommercial-ShareAlike License";
  }

  else if (test === "by-nc-nd") {
    codeShort = "by-nc-nd";
    codeLong = "Creative Commons Attribution-NonCommercial-NoDerivs License";
  }

  return link;
}

console.log(generateLicenseLink("CC-BY"));
console.log(generateLicenseLink("CC-BY-NC"));
console.log(generateLicenseLink("CC-BY-SA"));
console.log(generateLicenseLink("CC-BY-ND"));
console.log(generateLicenseLink("CC-BY-NC-SA"));
console.log(generateLicenseLink("CC-BY-NC-ND"));

我想要返回的内容如下所示：'Creative Commons Attribution-NonCommercial License'
谢谢大家!
我试过用switch语句代替if语句，试过用不同的方式格式化URL，试过替换"CC-"并在不同的位置拆分元素，但在变量部分都显示为未定义，如下所示：
未定义https://creativecommons.org/licenses/undefined/4.0/>undefined