Scrape out monkey patching

Changelog.md

@@ -3,6 +3,9 @@
 Breaking Changes:
 
 * Ruby < 2.3 is no longer supported. (Phil Pirozhkov, #2787)
+* Extract `should` syntax (including the non-monkey-patching one liner). (Phil Pirozhkov, #2803)
+* Remove globally-exposed DSL (example and shared group methods
+  in the root scope and on Module). (Phil Pirozhkov, #2803)
 
 Enhancements:
 

features/subject/one_liner_syntax.feature

@@ -1,22 +1,13 @@
-@oneliner-should
 Feature: One-liner syntax
 
-  RSpec supports a one-liner syntax for setting an expectation on the
-  `subject`.  RSpec will give the examples a doc string that is auto-
+  RSpec supports a one-liner syntax, `is_expected`, for setting an expectation
+  on the `subject`. RSpec will give the examples a doc string that is auto-
   generated from the matcher used in the example. This is designed specifically
   to help avoid duplication in situations where the doc string and the matcher
   used in the example mirror each other exactly. When used excessively, it can
   produce documentation output that does not read well or contribute to
-  understanding the object you are describing.
-
-  This comes in two flavors:
-
-    * `is_expected` is defined simply as `expect(subject)` and is designed for
-      when you are using rspec-expectations with its newer expect-based syntax.
-    * `should` was designed back when rspec-expectations only had a should-based
-      syntax. However, it continues to be available and work even if the
-      `:should` syntax is disabled (since that merely removes `Object#should`
-      but this is `RSpec::Core::ExampleGroup#should`).
+  understanding the object you are describing. This syntax is a shorthand for
+  `expect(subject)`.
 
   Notes:
 
@@ -29,13 +20,6 @@ Feature: One-liner syntax
       """ruby
       RSpec.describe Array do
         describe "when first created" do
-          # Rather than:
-          # it "should be empty" do
-          #   subject.should be_empty
-          # end
-
-          it { should be_empty }
-          # or
           it { is_expected.to be_empty }
         end
       end
@@ -47,7 +31,6 @@ Feature: One-liner syntax
        Array
          when first created
            is expected to be empty
-           is expected to be empty
        """
 
   Scenario: Explicit subject
@@ -56,8 +39,6 @@ Feature: One-liner syntax
       RSpec.describe Array do
         describe "with 3 items" do
           subject { [1,2,3] }
-          it { should_not be_empty }
-          # or
           it { is_expected.not_to be_empty }
         end
       end
@@ -69,5 +50,4 @@ Feature: One-liner syntax
        Array
          with 3 items
            is expected not to be empty
-           is expected not to be empty
        """

features/support/require_expect_syntax_in_aruba_specs.rb

@@ -1,29 +1,10 @@
 if defined?(Cucumber)
   require 'shellwords'
-  Before('~@allow-should-syntax', '~@with-clean-spec-opts') do
+  Before('~@with-clean-spec-opts') do
     set_environment_variable('SPEC_OPTS', "-r#{Shellwords.escape(__FILE__)}")
   end
-
-  Before('@oneliner-should') do
-    set_environment_variable('ALLOW_ONELINER_SHOULD', 'true')
-  end
 else
   if ENV['REMOVE_OTHER_RSPEC_LIBS_FROM_LOAD_PATH']
     $LOAD_PATH.reject! { |x| /rspec-mocks/ === x || /rspec-expectations/ === x }
   end
-
-  module DisallowOneLinerShould
-    def should(*)
-      raise "one-liner should is not allowed"
-    end
-
-    def should_not(*)
-      raise "one-liner should_not is not allowed"
-    end
-  end
-
-  RSpec.configure do |rspec|
-    rspec.disable_monkey_patching!
-    rspec.include DisallowOneLinerShould unless ENV['ALLOW_ONELINER_SHOULD']
-  end
 end

lib/rspec/core.rb

@@ -178,7 +178,4 @@ def self.const_missing(name)
     require MODULES_TO_AUTOLOAD.fetch(name) { return super }
     ::RSpec.const_get(name)
   end
-
-  Core::DSL.expose_globally!
-  Core::SharedExampleGroup::TopLevelDSL.expose_globally!
 end