[ruby/irb] Don't use delegator to install helper methods to main

object
(https://github.com/ruby/irb/pull/1031)

IRB used delegator to install command as a method of frozen main object.
Command is not a method now. We can drop it.

https://github.com/ruby/irb/commit/2f1c593801

2 files changed, 26 insertions, 0 deletions

diff --git a/test/irb/command/test_cd.rb b/test/irb/command/test_cd.rb
index 4537286f73..10f77f6691 100644
--- a/test/irb/command/test_cd.rb
+++ b/test/irb/command/test_cd.rb
@@ -19,6 +19,12 @@ module TestIRB
           end
         end
 
+        class BO < BasicObject
+          def baz
+            "this is baz"
+          end
+        end
+
         binding.irb
       RUBY
     end
@@ -40,6 +46,19 @@ module TestIRB
       assert_match(/irb\(Foo\):006>/, out)
     end
 
+    def test_cd_basic_object_or_frozen
+      out = run_ruby_file do
+        type "cd BO.new"
+        type "cd 1"
+        type "cd Object.new.freeze"
+        type "exit"
+      end
+
+      assert_match(/irb\(#<BO:.+\):002>/, out)
+      assert_match(/irb\(1\):003>/, out)
+      assert_match(/irb\(#<Object:.+\):004>/, out)
+    end
+
     def test_cd_moves_top_level_with_no_args
       out = run_ruby_file do
         type "cd Foo"
diff --git a/test/irb/test_context.rb b/test/irb/test_context.rb
index d2c007af34..b02d8dbe09 100644
--- a/test/irb/test_context.rb
+++ b/test/irb/test_context.rb
@@ -652,6 +652,13 @@ module TestIRB
       assert_equal('irb("aaaaaaaaaaaaaaaaaaaaaaaaaaaa...)>', irb.send(:format_prompt, 'irb(%M)>', nil, 1, 1))
     end
 
+    def test_prompt_main_basic_object
+      main = BasicObject.new
+      irb = IRB::Irb.new(IRB::WorkSpace.new(main), TestInputMethod.new)
+      assert_match(/irb\(#<BasicObject:.+\)/, irb.send(:format_prompt, 'irb(%m)>', nil, 1, 1))
+      assert_match(/irb\(#<BasicObject:.+\)/, irb.send(:format_prompt, 'irb(%M)>', nil, 1, 1))
+    end
+
     def test_prompt_main_raise
       main = Object.new
       def main.to_s; raise TypeError; end