1 files changed, 67 insertions, 0 deletions
diff --git a/rubocop/cop/rspec/duplicate_spec_location.rb b/rubocop/cop/rspec/duplicate_spec_location.rb
new file mode 100644
index 00000000000..c920104c8c0
--- /dev/null
+++ b/rubocop/cop/rspec/duplicate_spec_location.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require 'rubocop/cop/rspec/base'
+require 'rubocop/cop/rspec/mixin/top_level_group'
+
+module RuboCop
+  module Cop
+    module RSpec
+      # Cop that detects duplicate EE spec files
+      #
+      # There should not be files in both ee/spec/*/ee/my_spec.rb and ee/spec/*/my_spec.rb
+      #
+      #  # bad
+      #  ee/spec/controllers/my_spec.rb      # describe MyClass
+      #  ee/spec/controllers/ee/my_spec.rb   # describe MyClass
+      #
+      #  # good, spec for EE extension code
+      #  ee/spec/controllers/ee/my_spec.rb   # describe MyClass
+      #
+      #  # good, spec for EE only code
+      #  ee/spec/controllers/my_spec.rb      # describe MyClass
+      #
+      class DuplicateSpecLocation < RuboCop::Cop::RSpec::Base
+        include RuboCop::Cop::RSpec::TopLevelGroup
+
+        MSG = 'Duplicate spec location in `%<path>s`.'
+
+        def on_top_level_group(node)
+          path = file_path_for_node(node.send_node).sub(%r{\A#{rails_root}/}, '')
+          duplicate_path = find_duplicate_path(path)
+
+          return unless duplicate_path && File.exist?(File.join(rails_root, duplicate_path))
+
+          add_offense(node.send_node, message: format(MSG, path: duplicate_path))
+        end
+
+        private
+
+        def ee_spec?(path)
+          File.fnmatch?('ee/spec/**/*.rb', path, File::FNM_PATHNAME)
+        end
+
+        def find_duplicate_path(path)
+          return unless ee_spec?(path)
+
+          if File.fnmatch?('ee/spec/**/ee/**', path)
+            path.match('\A(ee/spec/[^/]+)/ee/(.+)') do |match|
+              File.join(match[1], match[2])
+            end
+          else
+            path.match('\A(ee/spec/[^/]+)/(.+)') do |match|
+              File.join(match[1], 'ee', match[2])
+            end
+          end
+        end
+
+        def file_path_for_node(node)
+          node.location.expression.source_buffer.name
+        end
+
+        def rails_root
+          File.expand_path('../../..', __dir__)
+        end
+      end
+    end
+  end
+end