Add support for RSpec 4

.rspec

@@ -1,4 +1,3 @@
---color
 --format progress
 --warnings
 --order random

Gemfile

@@ -3,3 +3,11 @@
 source 'https://rubygems.org'
 
 gemspec
+
+gem 'mutant',            '~> 0.14.2'
+gem 'mutant-rspec',      '~> 0.14.2'
+gem 'rspec',             '>= 3.13', '< 5'
+gem 'rspec-core',        '>= 3.13', '< 5'
+gem 'rspec-its',         '~> 2.0'
+gem 'rubocop',           '~> 1.7'
+gem 'rubocop-packaging', '~> 0.5'

Gemfile.lock

@@ -2,106 +2,150 @@ PATH
   remote: .
   specs:
     unparser (0.8.1)
-      diff-lcs (~> 1.6)
+      diff-lcs (>= 1.6, < 3)
       parser (>= 3.3.0)
       prism (>= 1.5.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.3)
-    date (3.4.1)
+    date (3.5.1)
     diff-lcs (1.6.2)
-    erb (5.0.1)
-    io-console (0.8.0)
-    irb (1.15.2)
+    erb (6.0.1)
+    io-console (0.8.2)
+    irb (1.17.0)
       pp (>= 0.6.0)
+      prism (>= 1.3.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    json (2.12.2)
+    json (2.18.1)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
-    mutant (0.13.2)
+    mutant (0.14.2)
       diff-lcs (~> 1.3)
-      irb (~> 1.15.2)
+      irb (~> 1.15)
       parser (~> 3.3.0)
       regexp_parser (~> 2.10)
-      sorbet-runtime (~> 0.5.0)
+      sorbet-runtime (~> 0.6.0)
       unparser (~> 0.8.0)
-    mutant-rspec (0.13.2)
-      mutant (= 0.13.2)
+    mutant-rspec (0.14.2)
+      mutant (= 0.14.2)
       rspec-core (>= 3.8.0, < 4.0.0)
     parallel (1.27.0)
-    parser (3.3.8.0)
+    parser (3.3.10.2)
       ast (~> 2.4.1)
       racc
-    pp (0.6.2)
+    pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
-    prism (1.5.1)
-    psych (5.2.6)
+    prism (1.9.0)
+    psych (5.3.1)
       date
       stringio
     racc (1.8.1)
     rainbow (3.1.1)
-    rdoc (6.14.1)
+    rdoc (7.2.0)
       erb
       psych (>= 4.0.0)
-    regexp_parser (2.10.0)
-    reline (0.6.1)
+      tsort
+    regexp_parser (2.11.3)
+    reline (0.6.3)
       io-console (~> 0.5)
-    rspec (3.13.1)
+    rspec (3.13.2)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
       rspec-mocks (~> 3.13.0)
-    rspec-core (3.13.4)
+    rspec-core (3.13.6)
       rspec-support (~> 3.13.0)
     rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-its (1.3.1)
-      rspec-core (>= 3.0.0)
-      rspec-expectations (>= 3.0.0)
-    rspec-mocks (3.13.5)
+    rspec-its (2.0.0)
+      rspec-core (>= 3.13.0)
+      rspec-expectations (>= 3.13.0)
+    rspec-mocks (3.13.7)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-support (3.13.4)
-    rubocop (1.76.2)
+    rspec-support (3.13.7)
+    rubocop (1.84.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.45.1, < 2.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.45.1)
+    rubocop-ast (1.49.0)
       parser (>= 3.3.7.2)
-      prism (~> 1.4)
+      prism (~> 1.7)
     rubocop-packaging (0.6.0)
       lint_roller (~> 1.1.0)
       rubocop (>= 1.72.1, < 2.0)
     ruby-progressbar (1.13.0)
-    sorbet-runtime (0.5.12194)
-    stringio (3.1.7)
-    unicode-display_width (3.1.4)
-      unicode-emoji (~> 4.0, >= 4.0.4)
-    unicode-emoji (4.0.4)
+    sorbet-runtime (0.6.12957)
+    stringio (3.2.0)
+    tsort (0.2.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
 
 PLATFORMS
-  x86_64-linux
+  arm64-darwin-25
+  ruby
 
 DEPENDENCIES
-  mutant (~> 0.13.2)
-  mutant-rspec (~> 0.13.0)
-  rspec (~> 3.13)
-  rspec-core (~> 3.13)
-  rspec-its (~> 1.3.0)
+  mutant (~> 0.14.2)
+  mutant-rspec (~> 0.14.2)
+  rspec (>= 3.13, < 5)
+  rspec-core (>= 3.13, < 5)
+  rspec-its (~> 2.0)
   rubocop (~> 1.7)
   rubocop-packaging (~> 0.5)
   unparser!
 
+CHECKSUMS
+  ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
+  date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
+  diff-lcs (1.6.2) sha256=9ae0d2cba7d4df3075fe8cd8602a8604993efc0dfa934cff568969efb1909962
+  erb (6.0.1) sha256=28ecdd99c5472aebd5674d6061e3c6b0a45c049578b071e5a52c2a7f13c197e5
+  io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
+  irb (1.17.0) sha256=168c4ddb93d8a361a045c41d92b2952c7a118fa73f23fe14e55609eb7a863aae
+  json (2.18.1) sha256=fe112755501b8d0466b5ada6cf50c8c3f41e897fa128ac5d263ec09eedc9f986
+  language_server-protocol (3.17.0.5) sha256=fd1e39a51a28bf3eec959379985a72e296e9f9acfce46f6a79d31ca8760803cc
+  lint_roller (1.1.0) sha256=2c0c845b632a7d172cb849cc90c1bce937a28c5c8ccccb50dfd46a485003cc87
+  mutant (0.14.2) sha256=ec3a03e65fb1cc639c02ae3444fc5e60bfd8da722a8f8d80492b0bc3fca1fba5
+  mutant-rspec (0.14.2) sha256=1dd8ee49a0ec517d4728d22d3cb5bc1f124f4944dde9f53859062688a7b4cec8
+  parallel (1.27.0) sha256=4ac151e1806b755fb4e2dc2332cbf0e54f2e24ba821ff2d3dcf86bf6dc4ae130
+  parser (3.3.10.2) sha256=6f60c84aa4bdcedb6d1a2434b738fe8a8136807b6adc8f7f53b97da9bc4e9357
+  pp (0.6.3) sha256=2951d514450b93ccfeb1df7d021cae0da16e0a7f95ee1e2273719669d0ab9df6
+  prettyprint (0.2.0) sha256=2bc9e15581a94742064a3cc8b0fb9d45aae3d03a1baa6ef80922627a0766f193
+  prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85
+  psych (5.3.1) sha256=eb7a57cef10c9d70173ff74e739d843ac3b2c019a003de48447b2963d81b1974
+  racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
+  rainbow (3.1.1) sha256=039491aa3a89f42efa1d6dec2fc4e62ede96eb6acd95e52f1ad581182b79bc6a
+  rdoc (7.2.0) sha256=8650f76cd4009c3b54955eb5d7e3a075c60a57276766ebf36f9085e8c9f23192
+  regexp_parser (2.11.3) sha256=ca13f381a173b7a93450e53459075c9b76a10433caadcb2f1180f2c741fc55a4
+  reline (0.6.3) sha256=1198b04973565b36ec0f11542ab3f5cfeeec34823f4e54cebde90968092b1835
+  rspec (3.13.2) sha256=206284a08ad798e61f86d7ca3e376718d52c0bc944626b2349266f239f820587
+  rspec-core (3.13.6) sha256=a8823c6411667b60a8bca135364351dda34cd55e44ff94c4be4633b37d828b2d
+  rspec-expectations (3.13.5) sha256=33a4d3a1d95060aea4c94e9f237030a8f9eae5615e9bd85718fe3a09e4b58836
+  rspec-its (2.0.0) sha256=a88e8bc38149f2835e93533591ec4f5c829aacbfd41269a2e6f9f5b82f5260df
+  rspec-mocks (3.13.7) sha256=0979034e64b1d7a838aaaddf12bf065ea4dc40ef3d4c39f01f93ae2c66c62b1c
+  rspec-support (3.13.7) sha256=0640e5570872aafefd79867901deeeeb40b0c9875a36b983d85f54fb7381c47c
+  rubocop (1.84.2) sha256=5692cea54168f3dc8cb79a6fe95c5424b7ea893c707ad7a4307b0585e88dbf5f
+  rubocop-ast (1.49.0) sha256=49c3676d3123a0923d333e20c6c2dbaaae2d2287b475273fddee0c61da9f71fd
+  rubocop-packaging (0.6.0) sha256=fb92bd0fb48e6f8cdb1648d2249b0cd51c2497dcc87340132d22f01edbf558a7
+  ruby-progressbar (1.13.0) sha256=80fc9c47a9b640d6834e0dc7b3c94c9df37f08cb072b7761e4a71e22cff29b33
+  sorbet-runtime (0.6.12957) sha256=691ccafeae2663236777ffc8a348266907fca3985b089f013d7ccd59bef19056
+  stringio (3.2.0) sha256=c37cb2e58b4ffbd33fe5cd948c05934af997b36e0b6ca6fdf43afa234cf222e1
+  tsort (0.2.0) sha256=9650a793f6859a43b6641671278f79cfead60ac714148aabe4e3f0060480089f
+  unicode-display_width (3.2.0) sha256=0cdd96b5681a5949cdbc2c55e7b420facae74c4aaf9a9815eee1087cb1853c42
+  unicode-emoji (4.2.0) sha256=519e69150f75652e40bf736106cfbc8f0f73aa3fb6a65afe62fefa7f80b0f80f
+  unparser (0.8.1)
+
 BUNDLED WITH
-   2.7.0
+  4.0.6

bin/parser-prism-round-trip-test

@@ -59,12 +59,12 @@ b\nar
 
     def excludes
       %w[
+        character_literal
         spanning_heredoc
         heredocs_with_fake_newlines
         heredocs_nested
-      ].tap { _1 << 'endless_methods_command_call' unless Gem::Version.new(RUBY_VERSION) >= '3.5' } # https://github.com/ruby/prism/pull/3639
-       .tap { _1 << 'leading_logical' unless Gem::Version.new(RUBY_VERSION) >= '3.5' } # https://github.com/ruby/prism/pull/3337
-       .to_set { |file| "#{PARSER_PATH}/test/prism/fixtures-tmp/#{file}.txt" }
+      ].flat_map { |file| Dir.glob("#{PARSER_PATH}/test/prism/fixtures-tmp/**/#{file}.txt") }
+       .to_set
     end
 
     private
@@ -105,7 +105,6 @@ Dir.chdir(PrismParser::PARSER_PATH) do
   Kernel.system(*%w[git clean --force -d -X], exception: true)
 end
 
-ignores_cli_option = PrismParser.excludes.flat_map { |file| ['--ignore', file] }
-
 PrismParser.prepare
-exit Unparser::CLI.run([PrismParser.target_glob, *ignores_cli_option])
+ignores_cli_option = PrismParser.excludes.flat_map { |file| ['--ignore', file] }
+exit Unparser::CLI.run([PrismParser.target_glob, '--ignore-original-syntax-error', *ignores_cli_option])

lib/unparser/emitter.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 module Unparser
-  UnknownNodeError = Class.new(ArgumentError)
+  class UnknownNodeError < ArgumentError
+  end
 
   # Emitter base class
   class Emitter

lib/unparser/util.rb

@@ -4,7 +4,8 @@ module Unparser
   # Original code before vendoring and reduction from: https://github.com/mbj/mutant/blob/main/lib/mutant/util.rb
   module Util
     # Error raised by `Util.one` if size is not exactly one
-    SizeError = Class.new(IndexError)
+    class SizeError < IndexError
+    end
 
     # Return only element in array if it contains exactly one member
     #

spec/spec_helper.rb

@@ -8,7 +8,7 @@
 
 RSpec.shared_examples_for 'a command method' do
   it 'returns self' do
-    should equal(object)
+    is_expected.to equal(object)
   end
 end
 
@@ -20,7 +20,7 @@
     memoized = __memoized.instance_variable_get(:@memoized)
 
     mutex.synchronize { memoized.delete(:subject) }
-    should equal(first)
+    is_expected.to equal(first)
   end
 end
 

spec/unit/unparser/abstract_type_spec.rb

@@ -2,7 +2,7 @@
   context 'called on a subclass' do
     let(:object) { Class.new(abstract_type) }
 
-    it { should be_instance_of(object) }
+    it { is_expected.to be_instance_of(object) }
   end
 
   context 'called on the class' do
@@ -31,7 +31,7 @@
     Object.class_eval { remove_const(:Subclass) }
   end
 
-  it { should equal(object) }
+  it { is_expected.to equal(object) }
 
   it 'creates an abstract method' do
     expect { subject }.to change { subclass.method_defined?(:some_method) }
@@ -70,7 +70,7 @@
     Object.class_eval { remove_const(:Subclass) }
   end
 
-  it { should equal(object) }
+  it { is_expected.to equal(object) }
 
   it 'creates an abstract method' do
     expect { subject }.to change { subclass.respond_to?(:some_method) }