Document how to exclude a directory

[Briantmorr]

This pull request fixes #1750, a need for better documenting of ignore patterns . Before creating this issue user vjpr was unable to find documention on this issue with keyword searches. I added a simple explanation using the words 'ignore' and 'exclude' so that users unsure how to ignore tests will also be more likely to find my explanation in keyword searches.
I also changed not-this-file.js to exclude-this-file.js to provide a clearer example to users reading the documentation.

[ghost]

@Briantmorr, you should also add an example of ignoring a directory.

[novemberborn]

Seconded.

[Briantmorr]

Thanks! Will do!

[novemberborn]

Thanks for helping out with this @Briantmorr. Could you add the directory-ignoring example @clemtrek mentioned?

[novemberborn]

Seconded.

[Briantmorr]

I pushed again with updated changes. Minor semantic detail, I changed the word 'folder' to directory for clarity.

[ghost]

@Briantmorr orr, I would prefer directory.

Any thoughts on this @novemberborn

[novemberborn]

👍 on directory, good call @Briantmorr.

These examples aren't quite right though. Once you customize files, you lose the default behavior:

• "my-test-directory/*.js": Only run test files inside my-test-directory
• "!exclude-this-directory/*.js": Doesn't do anything, since exclude-this-directory is never included in the first place
• "!**/exclude-this-file.js": Does exclude my-test-directory/exclude-this-file.js

I think it might be better if the first example is my-test-directory/**/*.js and the second !my-test-directory/exclude-this-directory/**/*.js. What do you think?

[Briantmorr]

Thanks for taking the time to explain @novemberborn . I greatly appreciate it! I just updated with your suggested changes!

[novemberborn]

Thanks @Briantmorr!