From cb95d834cc19a45a84d8d2c6d0f25d0c44e0d813 Mon Sep 17 00:00:00 2001
From: st0012 <stan001212@gmail.com>
Date: Wed, 26 Oct 2022 12:40:48 +0100
Subject: [PATCH] [ruby/irb] Don't insert new methods to Test::Unit::TestCase

Ruby CI runs irb and other Ruby core/stdlib tests in the same process.
So adding irb-specific helper to Test::Unit::TestCase could potentially
pollute other components' tests and should be avoided.
---
 test/irb/test_cmd.rb          |  4 +++-
 test/irb/test_helper.rb       | 16 ++++++++++++++++
 test/irb/test_input_method.rb |  4 +++-
 3 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 test/irb/test_helper.rb

diff --git a/test/irb/test_cmd.rb b/test/irb/test_cmd.rb
index 6c03a9de07..6ff2afc3e3 100644
--- a/test/irb/test_cmd.rb
+++ b/test/irb/test_cmd.rb
@@ -3,6 +3,8 @@ require "test/unit"
 require "irb"
 require "irb/extend-command"
 
+require_relative "test_helper"
+
 module TestIRB
   class ExtendCommand < Test::Unit::TestCase
     class TestInputMethod < ::IRB::InputMethod
@@ -443,7 +445,7 @@ module TestIRB
       irb = IRB::Irb.new(IRB::WorkSpace.new(self), input)
       IRB.conf[:MAIN_CONTEXT] = irb.context
       out, err = capture_output do
-        without_rdoc do
+        IRB::TestHelper.without_rdoc do
           irb.eval_input
         end
       end
diff --git a/test/irb/test_helper.rb b/test/irb/test_helper.rb
new file mode 100644
index 0000000000..19c39a4a59
--- /dev/null
+++ b/test/irb/test_helper.rb
@@ -0,0 +1,16 @@
+module IRB
+  module TestHelper
+    def self.without_rdoc(&block)
+      ::Kernel.send(:alias_method, :old_require, :require)
+
+      ::Kernel.define_method(:require) do |name|
+        raise LoadError, "cannot load such file -- rdoc (test)" if name.match?("rdoc") || name.match?(/^rdoc\/.*/)
+        ::Kernel.send(:old_require, name)
+      end
+
+      yield
+    ensure
+      EnvUtil.suppress_warning { ::Kernel.send(:alias_method, :require, :old_require) }
+    end
+  end
+end
diff --git a/test/irb/test_input_method.rb b/test/irb/test_input_method.rb
index 0e1af7bdc7..3618fa46f1 100644
--- a/test/irb/test_input_method.rb
+++ b/test/irb/test_input_method.rb
@@ -3,6 +3,8 @@
 require "test/unit"
 require "irb"
 
+require_relative "test_helper"
+
 module TestIRB
   class TestRelineInputMethod < Test::Unit::TestCase
     def setup
@@ -76,7 +78,7 @@ module TestIRB
 
       IRB.conf[:USE_AUTOCOMPLETE] = true
 
-      without_rdoc do
+      IRB::TestHelper.without_rdoc do
         IRB::RelineInputMethod.new
       end