JSTestDriver中的代码覆盖范围不喜欢let和const.它不会在包含它的任何文件上运行代码覆盖范围，并且不允许包含它的文件中的功能.

Code coverage in JSTestDriver does not like let and const. It will not run code coverage on any files that contain it and will not allow functions from a file that contains it.

对于我的特殊情况，我有一个使用const的函数.我正在测试的函数中没有调用使用它的函数，因此从未进行过测试.这意味着测试通过了.但是，在同一个文件中足以使代码覆盖范围中断.

For my particular case I had a function that used const. The function that used it was not called in the functions I was testing and thus was never tested at all. This meant the tests passed. However, being in the same file was enough to make code coverage break.

我的解决方案?将let和const都更改为var.从语义上讲，这可能不是***的主意，但就我而言，这对我的代码或行为没有明显的影响.

My solution? Change both let and const to var. Semantically it may not be the best idea but in my case it made no noticeable difference to my code or the behaviour.