add .mochaignore

[TrejGun]

Please add .mochaignore file same as .gitignore
to ignore some files

yes i know there is .skip for tests but it would be good to ignore dirs or files with utils and configs

[boneskull]

absolutely a good idea, but probably won't get implemented before #1969 unless there's a PR.

[megagon]

I want to make PR for this, do you have any wishes about how it should looks like?
my suggestion is to make by default something like mocha.ignore with something like this:
var skiplist = {folders:[], files: [], suites:[], tests:[]};
How is it sound?

[ScottFreeCode]

A couple thoughts/questions (EDIT: I can answer these since I'm more familiar than I was back when I asked...):

1. Should test files ignored this way be loaded but marked entirely as pending? That would cause problems for the use cases discussed in Option exclude certain files by pattern when testing recursively #1577. (Such a feature might be an interesting option to add to title-based filtering, but that's another matter.)
2. Can/should something equivalent to this work in the in-browser testing mode? For a page that can be opened manually to run tests, test files have to be included explicitly anyway, so there's no need for an option to exclude some; for automatic browser testing, e.g. with Karma, typically the browser testing harness is in control of both including and excluding files.

[boneskull]

since #1969 is still basically nowhere, a PR for this would be helpful.

[gndelia]

Is the idea to allow a configuration as megagon suggested?

Something like

{folders:[], files: [], suites:[], tests:[]};

?

• folders: Ignores a complete folder and its subdirectories from running tests
• files: Ignore specific files (by name ? by path?)
• suites: to ignore describe tests by name
• test: to ignore specific it tests by name

Should they show as pending, or as they do not exists?

[boneskull]

As of v6, this is implemented as the excludes config value. A .mochajs.json which includes the following should exhibit the requested behavior:

{
  "excludes": [
    "some-glob/**",
    "some-other-glob/*.derp"
  ]
}

I think that we could alias the excludes option to ignore.