https://git.ruby-lang.org/ruby.git/commit/?id=c00643c18a

From c00643c18a6c4da2c3c5ff05f8b3987523bc23e2 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Fri, 10 Sep 2021 06:42:58 +0900
Subject: [ruby/reline] Add a test for dialog at right edge

https://github.com/ruby/reline/commit/db642169b9
---
 test/reline/yamatanooroti/test_rendering.rb | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
index 278850a..fdfcaf9 100644
--- a/test/reline/yamatanooroti/test_rendering.rb
+++ b/test/reline/yamatanooroti/test_rendering.rb
@@ -854,6 +854,25 @@ begin https://github.com/ruby/ruby/blob/trunk/test/reline/yamatanooroti/test_rendering.rb#L854
       EOC
     end
 
+    def test_simple_dialog_at_right_edge
+      start_terminal(20, 40, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --dialog simple}, startup_message: 'Multiline REPL.')
+      write('a')
+      write('b')
+      write('c')
+      write("\C-h")
+      close
+      assert_screen(<<~'EOC')
+        Multiline REPL.
+        prompt> ab
+            Ruby is...
+            A dynamic, open source programming
+            language with a focus on simplicity
+            and productivity. It has an elegant
+            syntax that is natural to read and
+            easy to write.
+      EOC
+    end
+
     def test_simple_dialog_with_scroll_key
       start_terminal(20, 50, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --dialog long,scrollkey}, startup_message: 'Multiline REPL.')
       write('a')
-- 
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