Is there anyway to have mocha display the name of, or group the output by *the test file*? 

Given two test files, `./test/testFoo.js` and `./test/testBar.js` I'd like to see something like this when running `mocha test`:

```sh

* testFoo:

  Doing X
    ✓ should return A
    ✓ even with negative input

  Doing Y
    ✓ should return B
    ✓ should return C when called with Egyptian hieroglyphs

* testBar:

  Doing Z
    ✓ should return D

```

(This might be an XY problem. If there are other way to group tests in two levels, I'm just as interested. It's just that the files are already there, as a kind of natural first level group.)