Obsolete StringAsInstanceDoubleConstant in favor of VerifiedDoubleReference for constants only

Author: corsonknowles

.rubocop.yml

@@ -250,8 +250,3 @@ Style/StringChars: {Enabled: true}
 Style/SuperWithArgsParentheses: {Enabled: true}
 Style/SwapValues: {Enabled: true}
 Style/YAMLFileRead: {Enabled: true}
-
-# Enable our own pending cops.
-#
-RSpec/StringAsInstanceDoubleConstant:
-  Enabled: true

CHANGELOG.md

@@ -14,6 +14,7 @@
 - Fix `RSpec/VoidExpect` to only operate inside an example block. ([@corsonknowles])
 - Change `RSpec/ContextWording` cop to always report an offense when both `Prefixes` and `AllowedPatterns` are empty. ([@ydah])
 - Add support for `and` and `or` compound matchers to `RSpec/ChangeByZero` cop. ([@ydah])
+- Replace `RSpec/StringAsInstanceDoubleConstant` with `RSpecVerifiedDoubleReference` configured to only support constant class references. ([@corsonknowles])
 
 ## 3.1.0 (2024-10-01)
 

config/default.yml

@@ -930,13 +930,6 @@ RSpec/SpecFilePathSuffix:
     - "**/spec/**/*"
   Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/SpecFilePathSuffix
 
-RSpec/StringAsInstanceDoubleConstant:
-  Description: Do not use a string as `instance_double` constant.
-  Enabled: pending
-  Safe: false
-  VersionAdded: '3.1'
-  Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/StringAsInstanceDoubleConstant
-
 RSpec/StubbedMock:
   Description: Checks that message expectations do not have a configured response.
   Enabled: true
@@ -995,12 +988,8 @@ RSpec/VerifiedDoubleReference:
   Description: Checks for consistent verified double reference style.
   Enabled: true
   SafeAutoCorrect: false
-  EnforcedStyle: constant
-  SupportedStyles:
-    - constant
-    - string
   VersionAdded: 2.10.0
-  VersionChanged: '2.12'
+  VersionChanged: "<<next>>"
   Reference: https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/VerifiedDoubleReference
 
 RSpec/VerifiedDoubles:

config/obsoletion.yml

@@ -12,6 +12,9 @@ changed_parameters:
     parameters: IgnoredPatterns
     alternative: AllowedPatterns
     severity: warning
+  - cops: RSpec/VerifiedDoubleReference
+    parameters: EnforcedStyle
+    reason: String references are not verifying unless the class is loaded.
 
 split:
   RSpec/FilePath:
@@ -23,6 +26,8 @@ removed:
   RSpec/Capybara/FeatureMethods:
     reason: >
       this cop has migrated to `RSpec/Dialect`. Please use `RSpec/Dialect` instead
+  RSpec/StringAsInstanceDoubleConstant:
+    reason: Please use `RSpec/VerifiedDoubleReference` instead
 
 extracted:
   RSpec/Rails/*: rubocop-rspec_rails

docs/modules/ROOT/pages/cops.adoc

@@ -101,7 +101,6 @@
 * xref:cops_rspec.adoc#rspecsortmetadata[RSpec/SortMetadata]
 * xref:cops_rspec.adoc#rspecspecfilepathformat[RSpec/SpecFilePathFormat]
 * xref:cops_rspec.adoc#rspecspecfilepathsuffix[RSpec/SpecFilePathSuffix]
-* xref:cops_rspec.adoc#rspecstringasinstancedoubleconstant[RSpec/StringAsInstanceDoubleConstant]
 * xref:cops_rspec.adoc#rspecstubbedmock[RSpec/StubbedMock]
 * xref:cops_rspec.adoc#rspecsubjectdeclaration[RSpec/SubjectDeclaration]
 * xref:cops_rspec.adoc#rspecsubjectstub[RSpec/SubjectStub]

docs/modules/ROOT/pages/cops_rspec.adoc

@@ -5909,45 +5909,6 @@ spec/models/user.rb       # shared_examples_for 'foo'
 
 * https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/SpecFilePathSuffix
 
-[#rspecstringasinstancedoubleconstant]
-== RSpec/StringAsInstanceDoubleConstant
-
-|===
-| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed
-
-| Pending
-| No
-| Always (Unsafe)
-| 3.1
-| -
-|===
-
-Do not use a string as `instance_double` constant.
-
-[#safety-rspecstringasinstancedoubleconstant]
-=== Safety
-
-This cop is unsafe because the correction requires loading the class.
-Loading before stubbing causes RSpec to only allow instance methods
-to be stubbed.
-
-[#examples-rspecstringasinstancedoubleconstant]
-=== Examples
-
-[source,ruby]
-----
-# bad
-instance_double('User', name: 'John')
-
-# good
-instance_double(User, name: 'John')
-----
-
-[#references-rspecstringasinstancedoubleconstant]
-=== References
-
-* https://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/StringAsInstanceDoubleConstant
-
 [#rspecstubbedmock]
 == RSpec/StubbedMock
 
@@ -6359,22 +6320,21 @@ let(:userFood_2) { 'fettuccine' }
 | Yes
 | Always (Unsafe)
 | 2.10.0
-| 2.12
+| <<next>>
 |===
 
 Checks for consistent verified double reference style.
 
-Only investigates references that are one of the supported styles.
+[#safety-rspecverifieddoublereference]
+=== Safety
 
-This cop can be configured in your configuration using the
-`EnforcedStyle` option and supports `--auto-gen-config`.
+This cop is unsafe because the correction requires loading the class.
+Loading before stubbing causes RSpec to only allow instance methods
+to be stubbed.
 
 [#examples-rspecverifieddoublereference]
 === Examples
 
-[#_enforcedstyle_-constant_-_default_-rspecverifieddoublereference]
-==== `EnforcedStyle: constant` (default)
-
 [source,ruby]
 ----
 # bad
@@ -6388,24 +6348,8 @@ let(:foo) do
 end
 ----
 
-[#_enforcedstyle_-string_-rspecverifieddoublereference]
-==== `EnforcedStyle: string`
-
-[source,ruby]
-----
-# bad
-let(:foo) do
-  instance_double(ClassName, method_name: 'returned_value')
-end
-
-# good
-let(:foo) do
-  instance_double('ClassName', method_name: 'returned_value')
-end
-----
-
-[#reference-is-not-in-the-supported-style-list_-no-enforcement-rspecverifieddoublereference]
-==== Reference is not in the supported style list. No enforcement
+[#reference-is-any-dynamic-variable_-no-enforcement-rspecverifieddoublereference]
+==== Reference is any dynamic variable. No enforcement
 
 [source,ruby]
 ----
@@ -6415,17 +6359,6 @@ let(:foo) do
 end
 ----
 
-[#configurable-attributes-rspecverifieddoublereference]
-=== Configurable attributes
-
-|===
-| Name | Default value | Configurable values
-
-| EnforcedStyle
-| `constant`
-| `constant`, `string`
-|===
-
 [#references-rspecverifieddoublereference]
 === References
 

lib/rubocop/cop/rspec/string_as_instance_double_constant.rb

@@ -5,14 +5,14 @@ module Cop
     module RSpec
       # Checks for consistent verified double reference style.
       #
-      # Only investigates references that are one of the supported styles.
-      #
       # @see https://rspec.info/features/3-12/rspec-mocks/verifying-doubles
       #
-      # This cop can be configured in your configuration using the
-      # `EnforcedStyle` option and supports `--auto-gen-config`.
+      # @safety
+      #   This cop is unsafe because the correction requires loading the class.
+      #   Loading before stubbing causes RSpec to only allow instance methods
+      #   to be stubbed.
       #
-      # @example `EnforcedStyle: constant` (default)
+      # @example
       #   # bad
       #   let(:foo) do
       #     instance_double('ClassName', method_name: 'returned_value')
@@ -23,28 +23,17 @@ module RSpec
       #     instance_double(ClassName, method_name: 'returned_value')
       #   end
       #
-      # @example `EnforcedStyle: string`
-      #   # bad
-      #   let(:foo) do
-      #     instance_double(ClassName, method_name: 'returned_value')
-      #   end
-      #
-      #   # good
-      #   let(:foo) do
-      #     instance_double('ClassName', method_name: 'returned_value')
-      #   end
-      #
-      # @example Reference is not in the supported style list. No enforcement
+      # @example Reference is any dynamic variable. No enforcement
       #
       #   # good
       #   let(:foo) do
       #     instance_double(@klass, method_name: 'returned_value')
       #   end
       class VerifiedDoubleReference < Base
         extend AutoCorrector
-        include ConfigurableEnforcedStyle
 
-        MSG = 'Use a %<style>s class reference for verified doubles.'
+        MSG = 'Use a constant class reference for verified doubles. ' \
+              'String references are not verifying unless the class is loaded.'
 
         RESTRICT_ON_SEND = Set[
           :class_double,
@@ -57,53 +46,25 @@ class VerifiedDoubleReference < Base
           :stub_model
         ].freeze
 
-        REFERENCE_TYPE_STYLES = {
-          str: :string,
-          const: :constant
-        }.freeze
-
         # @!method verified_double(node)
         def_node_matcher :verified_double, <<~PATTERN
           (send
             nil?
             RESTRICT_ON_SEND
-            $_class_reference
+            $str
             ...)
         PATTERN
 
         def on_send(node)
-          verified_double(node) do |class_reference|
-            break correct_style_detected unless opposing_style?(class_reference)
-
-            message = format(MSG, style: style)
-            expression = class_reference.source_range
-
-            add_offense(expression, message: message) do |corrector|
-              offense = class_reference.source
-              corrector.replace(expression, correct_style(offense))
-
-              opposite_style_detected
+          verified_double(node) do |string_argument_node|
+            add_offense(string_argument_node) do |corrector|
+              autocorrect(corrector, string_argument_node)
             end
           end
         end
 
-        private
-
-        def opposing_style?(class_reference)
-          class_reference_style = REFERENCE_TYPE_STYLES[class_reference.type]
-
-          # Only enforce supported styles
-          return false unless class_reference_style
-
-          class_reference_style != style
-        end
-
-        def correct_style(offense)
-          if style == :string
-            "'#{offense}'"
-          else
-            offense.gsub(/^['"]|['"]$/, '')
-          end
+        def autocorrect(corrector, node)
+          corrector.replace(node, node.value)
         end
       end
     end

lib/rubocop/cop/rspec/verified_double_reference.rb

@@ -99,7 +99,6 @@
 require_relative 'rspec/sort_metadata'
 require_relative 'rspec/spec_file_path_format'
 require_relative 'rspec/spec_file_path_suffix'
-require_relative 'rspec/string_as_instance_double_constant'
 require_relative 'rspec/stubbed_mock'
 require_relative 'rspec/subject_declaration'
 require_relative 'rspec/subject_stub'