Remove rails 5.1 support

.github/workflows/ci.yml

@@ -33,7 +33,6 @@ jobs:
         appraisal:
           - rails_6_0
           - rails_5_2
-          - rails_5_1
         adapter:
           - sqlite3
           - postgresql

Appraisals

@@ -23,26 +23,6 @@ shared_dependencies = proc do
   instance_eval(&shared_test_dependencies)
 end
 
-appraise 'rails_5_1' do
-  instance_eval(&shared_dependencies)
-  instance_eval(&controller_test_dependency)
-
-  gem 'rails', '5.1.7'
-  gem 'puma', '~> 3.7'
-  gem 'sass-rails', '~> 5.0'
-  gem 'turbolinks', '~> 5'
-  gem 'jbuilder', '~> 2.5'
-  gem 'bcrypt', '~> 3.1.7'
-  gem 'capybara', '~> 2.13'
-  gem 'selenium-webdriver'
-  gem 'listen', '~> 3.0.5'
-  gem 'spring-watcher-listen', '~> 2.0.0'
-
-  # Database adapters
-  gem 'pg', '~> 0.18'
-  gem 'sqlite3', '~> 1.3.6'
-end
-
 appraise 'rails_5_2' 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 2.6+, Rails
-5.1+, RSpec 3.x, and Minitest 5.x.
+5.2+, 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 = '>= 2.6.0'
-  s.add_dependency('activesupport', '>= 5.1.0')
+  s.add_dependency('activesupport', '>= 5.2.0')
 end

spec/support/unit/helpers/active_record_versions.rb

@@ -11,10 +11,6 @@ def active_record_version
       Tests::Version.new(::ActiveRecord::VERSION::STRING)
     end
 
-    def active_record_supports_active_storage?
-      active_record_version >= 5.2
-    end
-
     def active_record_supports_validate_presence_on_active_storage?
       active_record_version >= '6.0.0.beta1'
     end

spec/support/unit/helpers/rails_versions.rb

@@ -10,9 +10,5 @@ def self.configure_example_group(example_group)
     def rails_version
       Tests::Version.new(Rails::VERSION::STRING)
     end
-
-    def rails_gte_5_2?
-      rails_version >= 5.2
-    end
   end
 end