Add Suffixes configuration option to RSpec/ContextWording

Resolve: #1356

CHANGELOG.md

@@ -11,6 +11,7 @@
 * Fix a false positive for `RSpec/Capybara/SpecificMatcher`. ([@ydah][])
 * Fix a false negative for `RSpec/Capybara/SpecificMatcher` for `have_field`. ([@ydah][])
 * Fix a false positive for `RSpec/Capybara/SpecificMatcher` when may not have a `href` by `have_link`. ([@ydah][])
+* Add `Suffixes` configuration option to `RSpec/ContextWording`. ([@ydah][])
 
 ## 2.12.1 (2022-07-03)
 

config/default.yml

@@ -209,8 +209,9 @@ RSpec/ContextWording:
     - when
     - with
     - without
+  Suffixes: []
   VersionAdded: '1.20'
-  VersionChanged: 1.20.1
+  VersionChanged: '2.13'
   StyleGuide: https://rspec.rubystyle.guide/#context-descriptions
   Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/ContextWording
 

lib/rubocop/cop/rspec/context_wording.rb

@@ -35,41 +35,92 @@ module RSpec
       #   context 'when the display name is not present' do
       #     # ...
       #   end
+      #
+      # The default list of suffixes is empty. Users are encouraged to tailor
+      # the configuration to meet project needs. In many cases, this setting
+      # is not necessary, but it is provided for localization of languages
+      # where suffixes are important.
+      # They may consist of multiple words if desired.
+      #
+      # @example `Suffixes` configuration
+      #
+      #   # .rubocop.yml
+      #   # RSpec/ContextWording:
+      #   #   Suffixes:
+      #   #     - success
+      #
+      # @example
+      #   # bad
+      #   context 'when this test is failed' do
+      #     # ...
+      #   end
+      #
+      #   # good
+      #   context 'when this test is success' do
+      #     # ...
+      #   end
+      #
+      #   # good - behavior different from prefix
+      #   context 'when this test is unsuccess' do
+      #     # ...
+      #   end
+      #
       class ContextWording < Base
-        MSG = 'Start context description with %<prefixes>s.'
+        PREFIX_MSG = 'Start context description with %<prefixes>s.'
+        SUFFIX_MSG = 'End context description with %<suffixes>s.'
 
         # @!method context_wording(node)
         def_node_matcher :context_wording, <<-PATTERN
-          (block (send #rspec? { :context :shared_context } $(str #bad_prefix?) ...) ...)
+          (block (send #rspec? { :context :shared_context } $(str $_) ...) ...)
         PATTERN
 
         def on_block(node)
-          context_wording(node) do |context|
-            add_offense(context,
-                        message: format(MSG, prefixes: joined_prefixes))
+          context_wording(node) do |context, description|
+            offense_prefix(context) if bad_prefix?(description)
+            offense_suffix(context) if bad_suffix?(description)
           end
         end
 
         private
 
+        def offense_prefix(context)
+          add_offense(context,
+                      message: format(PREFIX_MSG,
+                                      prefixes: expect_word(prefixes)))
+        end
+
+        def offense_suffix(context)
+          add_offense(context,
+                      message: format(SUFFIX_MSG,
+                                      suffixes: expect_word(suffixes)))
+        end
+
         def bad_prefix?(description)
-          !prefix_regex.match?(description)
+          return false if prefixes.empty?
+
+          !/^#{Regexp.union(prefixes)}\b/.match?(description)
+        end
+
+        def bad_suffix?(description)
+          return false if suffixes.empty?
+
+          !/#{Regexp.union(suffixes)}$/.match?(description)
         end
 
-        def joined_prefixes
-          quoted = prefixes.map { |prefix| "'#{prefix}'" }
+        def expect_word(config_values)
+          quoted = config_values.map { |value| "'#{value}'" }
           return quoted.first if quoted.size == 1
 
           quoted << "or #{quoted.pop}"
           quoted.join(', ')
         end
 
         def prefixes
-          cop_config['Prefixes'] || []
+          cop_config['Prefixes']
         end
 
-        def prefix_regex
-          /^#{Regexp.union(prefixes)}\b/
+        def suffixes
+          cop_config['Suffixes']
         end
       end
     end

spec/rubocop/cop/rspec/context_wording_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe RuboCop::Cop::RSpec::ContextWording do
-  let(:cop_config) { { 'Prefixes' => %w[when with] } }
+  let(:cop_config) { { 'Prefixes' => %w[when with], 'Suffixes' => %w[] } }
 
   it 'skips describe blocks' do
     expect_no_offenses(<<-RUBY)
@@ -125,5 +125,41 @@
         RUBY
       end
     end
+
+    context "when `Suffixes: ['success', 'failed']`" do
+      let(:cop_config) do
+        { 'Prefixes' => %w[when with], 'Suffixes' => %w[success failed] }
+      end
+
+      it 'finds context without `success` at the ending' do
+        expect_offense(<<-RUBY)
+          context 'when the display name not present' do
+                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ End context description with 'success', or 'failed'.
+          end
+        RUBY
+      end
+
+      it 'finds shared_context without `success` at the ending' do
+        expect_offense(<<-RUBY)
+          shared_context 'when the display name not present' do
+                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ End context description with 'success', or 'failed'.
+          end
+        RUBY
+      end
+
+      it "skips descriptions ending with 'success'" do
+        expect_no_offenses(<<-RUBY)
+          context 'when the display name is not present success' do
+          end
+        RUBY
+      end
+
+      it "skips descriptions ending with 'unsuccess'" do
+        expect_no_offenses(<<-RUBY)
+          context 'when the display name is not unsuccess' do
+          end
+        RUBY
+      end
+    end
   end
 end