FileName cop to check rspec file ends in _rspec

[IanVaughan]

We just hit this, and thought maybe it should be added to the core...

Similar to file_name.rb in Rubocop core, the idea here would be to check files under the /spec directory to ensure they end in _rspec.

Users would need to exclude common non-spec directories like fixtures etc, and maybe this could provide a suggested default for common ones?

I'm happy to do this myself, but just wanted to check if a) I had missed this if already present, or b) was going in the wrong direction and should think of something else!

# @example
    #   # bad
    #   whatever.rb 
    #
    #   # bad
    #   whatever_foo.rb 
    #
    #   # good
    #   whatever_spec.rb 

See also file_path.rb

[andyw8]

I think you meant to write "check rspec file ends in _spec"?

The RSpec/FilePath cop already handles this, for example if you create a file spec/foo.rb containing a describe block, it will report:

spec/foo.rb:1:1: C: Spec path should end with foo*_spec.rb.`
describe Foo do
^^^^^^^^^^^^