1 files changed, 52 insertions, 0 deletions
diff --git a/rubocop/cop/qa/duplicate_testcase_link.rb b/rubocop/cop/qa/duplicate_testcase_link.rb
new file mode 100644
index 00000000000..f30768c7d80
--- /dev/null
+++ b/rubocop/cop/qa/duplicate_testcase_link.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require_relative '../../qa_helpers'
+
+module RuboCop
+  module Cop
+    module QA
+      # This cop checks for duplicate testcase links across e2e specs
+      #
+      # @example
+      #
+      #   # bad
+      #   it 'some test', testcase: '(...)/quality/test_cases/1892'
+      #   it 'another test, testcase: '(...)/quality/test_cases/1892'
+      #
+      #   # good
+      #   it 'some test', testcase: '(...)/quality/test_cases/1892'
+      #   it 'another test, testcase: '(...)/quality/test_cases/1894'
+      class DuplicateTestcaseLink < RuboCop::Cop::Cop
+        include QAHelpers
+
+        MESSAGE = "Don't reuse the same testcase link in different tests. Replace one of `%s`."
+
+        @testcase_set = Set.new
+
+        def_node_matcher :duplicate_testcase_link, <<~PATTERN
+          (block
+            (send nil? ...
+              ...
+              (hash
+                (pair
+                  (sym :testcase)
+                  (str $_))...)...)...)
+        PATTERN
+
+        def on_block(node)
+          return unless in_qa_file?(node)
+
+          duplicate_testcase_link(node) do |link|
+            break unless self.class.duplicate?(link)
+
+            add_offense(node, message: MESSAGE % link)
+          end
+        end
+
+        def self.duplicate?(link)
+          !@testcase_set.add?(link)
+        end
+      end
+    end
+  end
+end