Drop Ruby < 2.3 support

Changelog.md

@@ -1,5 +1,9 @@
 ### Development
 
+Breaking Changes:
+
+* Ruby < 2.3 is no longer supported. (Phil Pirozhkov, #2787)
+
 Enhancements:
 
 * Improve pluralisation of words ending with `s` (like process). (Joshua Pinter, #2779)

Gemfile

@@ -12,14 +12,6 @@ branch = File.read(File.expand_path("../maintenance-branch", __FILE__)).chomp
   end
 end
 
-if RUBY_VERSION < '1.9.3'
-  gem 'rake', '< 11.0.0' # rake 11 requires Ruby 1.9.3 or later
-elsif RUBY_VERSION < '2.0.0'
-  gem 'rake', '< 12.0.0' # rake 12 requires Ruby 2.0.0 or later
-else
-  gem 'rake', '> 12.3.2'
-end
-
 if ENV['DIFF_LCS_VERSION']
   gem 'diff-lcs', ENV['DIFF_LCS_VERSION']
 else
@@ -34,37 +26,10 @@ group :documentation do
   gem 'github-markup', :platform => :mri
 end
 
-if RUBY_VERSION < '2.0.0' || RUBY_ENGINE == 'java'
-  gem 'json', '< 2.0.0'
-else
-  gem 'json', '> 2.3.0'
-end
+# Until 1.13.2 is released due to Rubygems usage
+gem 'ffi', '~> 1.12.0'
 
-if RUBY_VERSION < '2.2.0' && !!(RbConfig::CONFIG['host_os'] =~ /cygwin|mswin|mingw|bccwin|wince|emx/)
-  gem 'ffi', '< 1.10'
-elsif RUBY_VERSION < '2.0'
-  gem 'ffi', '< 1.9.19' # ffi dropped Ruby 1.8 support in 1.9.19
-elsif RUBY_VERSION < '2.3.0'
-  gem 'ffi', '~> 1.12.0'
-else
-  # Until 1.13.2 is released due to Rubygems usage
-  gem 'ffi', '~> 1.12.0'
-end
-
-if RUBY_VERSION < '2.3.0' && !!(RbConfig::CONFIG['host_os'] =~ /cygwin|mswin|mingw|bccwin|wince|emx/)
-  gem "childprocess", "< 1.0.0"
-end
-
-platforms :jruby do
-  if RUBY_VERSION < '1.9.0'
-    # Pin jruby-openssl on older J Ruby
-    gem "jruby-openssl", "< 0.10.0"
-    # Pin child-process on older J Ruby
-    gem "childprocess", "< 1.0.0"
-  else
-    gem "jruby-openssl"
-  end
-end
+gem "jruby-openssl", platforms: :jruby
 
 gem 'simplecov', '~> 0.8'
 
@@ -73,14 +38,11 @@ if RUBY_VERSION >= '2.4' && RUBY_ENGINE == 'ruby'
   gem "rubocop", "~> 0.52.1"
 end
 
-gem 'test-unit', '~> 3.0' if RUBY_VERSION.to_f >= 2.2
+gem 'test-unit', '~> 3.0'
 
 # Version 5.12 of minitest requires Ruby 2.4
 if RUBY_VERSION < '2.4.0'
   gem 'minitest', '< 5.12.0'
 end
 
-
-gem 'contracts', '< 0.16' if RUBY_VERSION < '1.9.0'
-
 eval File.read('Gemfile-custom') if File.exist?('Gemfile-custom')

Gemfile-custom.sample

@@ -8,12 +8,6 @@ group :development do
   platform :mri do
     gem 'rb-fsevent', '~> 0.9.0'
     gem 'ruby-prof', '~> 0.13.0'
-
-    case RUBY_VERSION
-    when /^1.8/
-      gem 'ruby-debug'
-    when /^1.9/
-      gem 'debugger'
-    end
+    gem 'pry-byebug'
   end
 end

cucumber.yml

@@ -1,6 +1,2 @@
-<%
-exclusions = []
-exclusions << ' --tags ~@no-jruby' if RUBY_PLATFORM == 'java'
-%>
-default: --require features --strict --format progress --tags ~@wip<%= exclusions.join %> features
+default: --require features --strict --format progress --tags ~@wip features
 wip:     --require features --tags @wip:30 --wip features

features/expectation_framework_integration/configure_expectation_framework.feature

@@ -72,7 +72,6 @@ Feature: configure expectation framework
       """
     And  the output should contain "3 examples, 1 failure"
 
-  @broken-on-jruby-9000
   Scenario: Configure minitest assertions
     Given rspec-expectations is not installed
       And a file named "example_spec.rb" with:

features/step_definitions/additional_cli_steps.rb

@@ -232,13 +232,7 @@
 
 module Normalization
   def normalize_failure_output(text)
-    whitespace_normalized = text.lines.map { |line| line.sub(/\s+$/, '').sub(/:in .*$/, '') }.join
-
-    # 1.8.7 and JRuby produce slightly different output for `Hash#fetch` errors, so we
-    # convert it to the same output here to match our expectation.
-    whitespace_normalized.
-      sub("IndexError", "KeyError").
-      sub(/key not found.*$/, "key not found")
+    text.lines.map { |line| line.sub(/\s+$/, '').sub(/:in .*$/, '') }.join
   end
 end
 

features/step_definitions/core_standalone_steps.rb

@@ -1,9 +1,7 @@
 Given(/^only rspec-core is installed$/) do
-  if RUBY_VERSION.to_f >= 1.9 # --disable-gems is invalid on 1.8.7
-    # Ensure the gem versions of rspec-mocks and rspec-expectations
-    # won't be loaded if available on the developers machine.
-    set_environment_variable('RUBYOPT', ENV['RUBYOPT'] + ' --disable-gems')
-  end
+  # Ensure the gem versions of rspec-mocks and rspec-expectations
+  # won't be loaded if available on the developers machine.
+  set_environment_variable('RUBYOPT', ENV['RUBYOPT'] + ' --disable-gems')
 
   # This will make `require_expect_syntax_in_aruba_specs.rb` (loaded
   # automatically when the specs run) remove rspec-mocks and

lib/rspec/core.rb

@@ -12,7 +12,6 @@
   warnings
 
   set
-  flat_map
   filter_manager
   dsl
   notifications
@@ -101,10 +100,9 @@ def self.configure
   # The example being executed.
   #
   # The primary audience for this method is library authors who need access
-  # to the example currently being executed and also want to support all
-  # versions of RSpec 2 and 3.
+  # to the example currently being executed and also want to support RSpec 2.
   #
-  # @example
+  # @example support for RSpec version 2
   #
   #     RSpec.configure do |c|
   #       # context.example is deprecated, but RSpec.current_example is not

lib/rspec/core/bisect/shell_command.rb

@@ -1,4 +1,5 @@
 RSpec::Support.require_rspec_core "shell_escape"
+RSpec::Support.require_rspec_support 'ruby_features'
 require 'shellwords'
 
 module RSpec
@@ -63,6 +64,7 @@ def spec_opts_without_bisect
       private
 
         include RSpec::Core::ShellEscape
+
         # On JRuby, Open3.popen3 does not handle shellescaped args properly:
         # https://github.com/jruby/jruby/issues/2767
         if RSpec::Support::Ruby.jruby?

lib/rspec/core/bisect/shell_runner.rb

@@ -41,31 +41,8 @@ def run_locations(*capture_args)
           end
         end
 
-        # `Open3.capture2e` does not work on JRuby:
-        # https://github.com/jruby/jruby/issues/2766
-        if Open3.respond_to?(:capture2e) && !RSpec::Support::Ruby.jruby?
-          def run_command(cmd)
-            Open3.capture2e(@shell_command.bisect_environment_hash, cmd).first
-          end
-        else # for 1.8.7
-          # :nocov:
-          def run_command(cmd)
-            out = err = nil
-
-            original_spec_opts = ENV['SPEC_OPTS']
-            ENV['SPEC_OPTS'] = @shell_command.spec_opts_without_bisect
-
-            Open3.popen3(cmd) do |_, stdout, stderr|
-              # Reading the streams blocks until the process is complete
-              out = stdout.read
-              err = stderr.read
-            end
-
-            "Stdout:\n#{out}\n\nStderr:\n#{err}"
-          ensure
-            ENV['SPEC_OPTS'] = original_spec_opts
-          end
-          # :nocov:
+        def run_command(cmd)
+          Open3.capture2e(@shell_command.bisect_environment_hash, cmd).first
         end
       end
     end

lib/rspec/core/configuration.rb

@@ -2,6 +2,7 @@
 RSpec::Support.require_rspec_core "ruby_project"
 RSpec::Support.require_rspec_core "formatters/deprecation_formatter"
 RSpec::Support.require_rspec_core "output_wrapper"
+RSpec::Support.require_rspec_support 'ruby_features'
 
 module RSpec
   module Core
@@ -842,8 +843,8 @@ def expect_with(*frameworks)
 
             # Tag this exception class so our exception formatting logic knows
             # that it satisfies the `MultipleExceptionError` interface.
-            ::RSpec::Expectations::MultipleExpectationsNotMetError.__send__(
-              :include, MultipleExceptionError::InterfaceTag
+            ::RSpec::Expectations::MultipleExpectationsNotMetError.include(
+              MultipleExceptionError::InterfaceTag
             )
 
             ::RSpec::Matchers
@@ -1495,43 +1496,41 @@ def extend(mod, *filters)
         end
       end
 
-      if RSpec::Support::RubyFeatures.module_prepends_supported?
-        # Tells RSpec to prepend example groups with `mod`. Methods defined in
-        # `mod` are exposed to examples (not example groups). Use `filters` to
-        # constrain the groups in which to prepend the module.
-        #
-        # Similar to `include`, but module is included before the example group's class
-        # in the ancestor chain.
-        #
-        # @example
-        #
-        #     module OverrideMod
-        #       def override_me
-        #         "overridden"
-        #       end
-        #     end
-        #
-        #     RSpec.configure do |config|
-        #       config.prepend(OverrideMod, :method => :prepend)
-        #     end
-        #
-        #     describe "overriding example's class", :method => :prepend do
-        #       it "finds the user" do
-        #         self.class.class_eval do
-        #           def override_me
-        #           end
-        #         end
-        #         override_me # => "overridden"
-        #         # ...
-        #       end
-        #     end
-        #
-        # @see #include
-        # @see #extend
-        def prepend(mod, *filters)
-          define_mixed_in_module(mod, filters, @prepend_modules, :prepend) do |group|
-            safe_prepend(mod, group)
-          end
+      # Tells RSpec to prepend example groups with `mod`. Methods defined in
+      # `mod` are exposed to examples (not example groups). Use `filters` to
+      # constrain the groups in which to prepend the module.
+      #
+      # Similar to `include`, but module is included before the example group's class
+      # in the ancestor chain.
+      #
+      # @example
+      #
+      #     module OverrideMod
+      #       def override_me
+      #         "overridden"
+      #       end
+      #     end
+      #
+      #     RSpec.configure do |config|
+      #       config.prepend(OverrideMod, :method => :prepend)
+      #     end
+      #
+      #     describe "overriding example's class", :method => :prepend do
+      #       it "finds the user" do
+      #         self.class.class_eval do
+      #           def override_me
+      #           end
+      #         end
+      #         override_me # => "overridden"
+      #         # ...
+      #       end
+      #     end
+      #
+      # @see #include
+      # @see #extend
+      def prepend(mod, *filters)
+        define_mixed_in_module(mod, filters, @prepend_modules, :prepend) do |group|
+          safe_prepend(mod, group)
         end
       end
 
@@ -1586,14 +1585,14 @@ def in_project_source_dir_regex
 
       # @private
       def configure_mock_framework
-        RSpec::Core::ExampleGroup.__send__(:include, mock_framework)
+        RSpec::Core::ExampleGroup.include(mock_framework)
         conditionally_disable_mocks_monkey_patching
       end
 
       # @private
       def configure_expectation_framework
         expectation_frameworks.each do |framework|
-          RSpec::Core::ExampleGroup.__send__(:include, framework)
+          RSpec::Core::ExampleGroup.include(framework)
         end
         conditionally_disable_expectations_monkey_patching
       end
@@ -2155,7 +2154,7 @@ def run_suite_hooks(hook_description, hooks)
       end
 
       def get_files_to_run(paths)
-        files = FlatMap.flat_map(paths_to_check(paths)) do |path|
+        files = paths_to_check(paths).flat_map do |path|
           path = path.gsub(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR
           File.directory?(path) ? gather_directories(path) : extract_location(path)
         end.uniq
@@ -2331,30 +2330,16 @@ def metadata_applies_to_group?(meta, group)
         meta.empty? || MetadataFilter.apply?(:any?, meta, group.metadata)
       end
 
-      if RSpec::Support::RubyFeatures.module_prepends_supported?
-        def safe_prepend(mod, host)
-          host.__send__(:prepend, mod) unless host < mod
-        end
+      def safe_prepend(mod, host)
+        host.prepend(mod) unless host < mod
       end
 
-      if RUBY_VERSION.to_f >= 1.9
-        def safe_include(mod, host)
-          host.__send__(:include, mod) unless host < mod
-        end
-
-        def safe_extend(mod, host)
-          host.extend(mod) unless host.singleton_class < mod
-        end
-      else # for 1.8.7
-        # :nocov:
-        def safe_include(mod, host)
-          host.__send__(:include, mod) unless host.included_modules.include?(mod)
-        end
+      def safe_include(mod, host)
+        host.include(mod) unless host < mod
+      end
 
-        def safe_extend(mod, host)
-          host.extend(mod) unless (class << host; self; end).included_modules.include?(mod)
-        end
-        # :nocov:
+      def safe_extend(mod, host)
+        host.extend(mod) unless host.singleton_class < mod
       end
 
       def define_mixed_in_module(mod, filters, mod_list, config_method, &block)

lib/rspec/core/configuration_options.rb

@@ -169,7 +169,7 @@ def parse_args_ignoring_files_or_dirs_to_run(args, source)
       def args_from_options_file(path)
         return [] unless path && File.exist?(path)
         config_string = options_file_as_erb_string(path)
-        FlatMap.flat_map(config_string.split(/\n+/), &:shellsplit)
+        config_string.split(/\n+/).flat_map(&:shellsplit)
       end
 
       def options_file_as_erb_string(path)

lib/rspec/core/example.rb

@@ -1,3 +1,5 @@
+RSpec::Support.require_rspec_support 'ruby_features'
+
 module RSpec
   module Core
     # Wrapper for an instance of a subclass of {ExampleGroup}. An instance of
@@ -294,7 +296,7 @@ def run(example_group_instance, reporter)
         RSpec.current_example = nil
       end
 
-      if RSpec::Support::Ruby.jruby? || RUBY_VERSION.to_f < 1.9
+      if RSpec::Support::Ruby.jruby?
         # :nocov:
         # For some reason, rescuing `Support::AllExceptionsExceptOnesWeMustNotRescue`
         # in place of `Exception` above can cause the exit status to be the wrong