https://git.ruby-lang.org/ruby.git/commit/?id=e6af81bde1

From e6af81bde166f8714a835d768363fa8de6426885 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Tue, 19 Jan 2021 00:14:12 -0800
Subject: [ruby/irb] Stub a screen size for test_context

http://ci.rvm.jp/logfiles/brlog.trunk-random1.20210119-074232

https://github.com/ruby/irb/commit/ea87592d4a

diff --git a/test/irb/test_color.rb b/test/irb/test_color.rb
index 4598021..50dfc22 100644
--- a/test/irb/test_color.rb
+++ b/test/irb/test_color.rb
@@ -19,7 +19,6 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_color.rb#L19
     CYAN      = "\e[36m"
 
     def setup
-      super
       @get_screen_size = Reline.method(:get_screen_size)
       Reline.instance_eval { undef :get_screen_size }
       def Reline.get_screen_size
@@ -30,7 +29,6 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_color.rb#L29
     def teardown
       Reline.instance_eval { undef :get_screen_size }
       Reline.define_singleton_method(:get_screen_size, @get_screen_size)
-      super
     end
 
     def test_colorize_code
diff --git a/test/irb/test_context.rb b/test/irb/test_context.rb
index 2dba42d..63e71e5 100644
--- a/test/irb/test_context.rb
+++ b/test/irb/test_context.rb
@@ -42,6 +42,17 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_context.rb#L42
       IRB.conf[:VERBOSE] = false
       workspace = IRB::WorkSpace.new(Object.new)
       @context = IRB::Context.new(nil, workspace, TestInputMethod.new)
+
+      @get_screen_size = Reline.method(:get_screen_size)
+      Reline.instance_eval { undef :get_screen_size }
+      def Reline.get_screen_size
+        [36, 80]
+      end
+    end
+
+    def teardown
+      Reline.instance_eval { undef :get_screen_size }
+      Reline.define_singleton_method(:get_screen_size, @get_screen_size)
     end
 
     def test_last_value
-- 
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