Fix: Fix false negative for RSpec/Dialect when specified Capybara-specific methods

[sanfrecce-osaka]

fixed #1951

RuboCop::Cop::RSpec::Dialect#rspec_method? detects if node's second child is an RSpec block using RuboCop::RSpec::Language::ALL.all. However, RuboCop::Cop::RSpec::Dialect#rspec_method? returned nil because the following Capybara-specific methods were not set in config/default.yml.

• given
• given!
• background

I remove the line that checks if it’s a rspec_method? and add a inside_example_group? check.

cf. #1951 (comment)

Due to the above, it wouldn't filter out are calls with an explicit receiver where the receiver is not RSpec, eg foo.describe. so the following examples were removed.

• allows calling methods named xxx in examples

---

Before submitting the PR make sure the following are checked:

• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Updated documentation.
• Added an entry to the CHANGELOG.md if the new code introduces user-observable changes.
• The build (bundle exec rake) passes (be sure to run this locally, since it may produce updated documentation that you will need to commit).

If you have created a new cop:

• Added the new cop to config/default.yml.
• The cop is configured as Enabled: pending in config/default.yml.
• The cop is configured as Enabled: true in .rubocop.yml.
• The cop documents examples of good and bad code.
• The tests assert both that bad code is reported and that good code is not reported.
• Set VersionAdded: "<<next>>" in default/config.yml.

If you have modified an existing cop's configuration options:

• Set VersionChanged: "<<next>>" in config/default.yml.

[sanfrecce-osaka]

Should I also change the following document as it no longer checks for RuboCop::RSpec::Language::ALL.all?

rubocop-rspec/lib/rubocop/cop/rspec/dialect.rb

Lines 8 to 23 in fa5da43

	# A dialect can be based on the following RSpec methods:
	#
	# - describe, context, feature, example_group
	# - xdescribe, xcontext, xfeature
	# - fdescribe, fcontext, ffeature
	# - shared_examples, shared_examples_for, shared_context
	# - it, specify, example, scenario, its
	# - fit, fspecify, fexample, fscenario, focus
	# - xit, xspecify, xexample, xscenario, skip
	# - pending
	# - prepend_before, before, append_before,
	# - around
	# - prepend_after, after, append_after
	# - let, let!
	# - subject, subject!
	# - expect, is_expected, expect_any_instance_of

[pirj]

change the following document

Maybe. I find it hard to understand what the “based” means in “dialect can be based on the following RSpec methods”, though.

Can you think of a simpler description?

[pirj]

Those ones were here to ensure that context with an explicit receiver is not detected. Can you keep it in some way?