Remove Rails 4.2 support

.github/workflows/ci.yml

@@ -35,13 +35,9 @@ jobs:
           - rails_5_2
           - rails_5_1
           - rails_5_0
-          - rails_4_2
         adapter:
           - sqlite3
           - postgresql
-        exclude:
-          - { ruby: 2.7.2, appraisal: rails_4_2 }
-          - { ruby: 2.6.6, appraisal: rails_4_2 }
     env:
       DATABASE_ADAPTER: ${{ matrix.adapter }}
       BUNDLE_GEMFILE: gemfiles/${{ matrix.appraisal }}.gemfile

Appraisals

@@ -23,29 +23,6 @@ shared_dependencies = proc do
   instance_eval(&shared_test_dependencies)
 end
 
-appraise 'rails_4_2' do
-  instance_eval(&shared_dependencies)
-
-  gem 'rails', '4.2.11.1'
-  gem 'sass-rails', '~> 5.0'
-  gem 'uglifier', '>= 1.3.0'
-  gem 'coffee-rails', '~> 4.1.0'
-  gem 'jquery-rails'
-  gem 'turbolinks'
-  gem 'jbuilder', '~> 2.0'
-  gem 'sdoc', '~> 0.4.0', group: :doc
-  gem 'bcrypt', '~> 3.1.7'
-
-  # Other dependencies
-  gem 'activeresource', '4.0.0'
-  gem 'json', '~> 1.4'
-  gem 'protected_attributes', '~> 1.0.6'
-
-  # Database adapters
-  gem 'pg', '~> 0.18'
-  gem 'sqlite3', '~> 1.3.6'
-end
-
 appraise 'rails_5_0' do
   instance_eval(&shared_dependencies)
   instance_eval(&controller_test_dependency)

README.md

@@ -469,7 +469,7 @@ machine, understanding the codebase, and creating a good pull request.
 ## Compatibility
 
 Shoulda Matchers is tested and supported against Ruby 2.5+, Rails
-4.2+, RSpec 3.x, and Minitest 5.x.
+5.0+, RSpec 3.x, and Minitest 5.x.
 
 - For Ruby < 2.4 and Rails < 4.1 compatibility, please use [v3.1.3][v3.1.3].
 - For Ruby < 3.0 and Rails < 6.1 compatibility, please use [v4.5.1][v4.5.1].

shoulda-matchers.gemspec

@@ -37,5 +37,5 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
 
   s.required_ruby_version = '>= 2.5.0'
-  s.add_dependency('activesupport', '>= 4.2.0')
+  s.add_dependency('activesupport', '>= 5.0.0')
 end

spec/support/unit/capture.rb

@@ -1,6 +1,6 @@
 module Kernel
-  # #capture, #silence_stream, and #silence_stderr are deprecated after Rails
-  # 4.2 and will be removed in 5.0, so just override them completely here
+  # #capture, #silence_stream, and #silence_stderr were removed in rails 5.0,
+  # but we keep it them here
 
   if method_defined?(:capture)
     undef_method :capture