From d1498f93ab0ef48f8cf8f6ec718317dab6cd11b6 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Fri, 10 Sep 2021 08:15:00 +0900
Subject: [ruby/reline] Add a test that dialog doesn't crash when callback
 returns nil

https://github.com/ruby/reline/commit/2c6f604b98
---
 test/reline/yamatanooroti/multiline_repl    |  1 +
 test/reline/yamatanooroti/test_rendering.rb | 10 ++++++++++
 2 files changed, 11 insertions(+)

(limited to 'test')

diff --git a/test/reline/yamatanooroti/multiline_repl b/test/reline/yamatanooroti/multiline_repl
index c944da8a38..49c7a56074 100755
--- a/test/reline/yamatanooroti/multiline_repl
+++ b/test/reline/yamatanooroti/multiline_repl
@@ -32,6 +32,7 @@ opt.on('--auto-indent') {
 }
 opt.on('--dialog VAL') { |v|
   Reline.add_dialog_proc(:simple_dialog, lambda {
+    return nil if v.include?('nil')
     if v.include?('simple')
       contents = <<~RUBY.split("\n")
         Ruby is...
diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
index d105405500..285a10c23b 100644
--- a/test/reline/yamatanooroti/test_rendering.rb
+++ b/test/reline/yamatanooroti/test_rendering.rb
@@ -1011,6 +1011,16 @@ begin
       EOC
     end
 
+    def test_dialog_callback_returns_nil
+      start_terminal(20, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --dialog nil}, startup_message: 'Multiline REPL.')
+      write('a')
+      close
+      assert_screen(<<~'EOC')
+        Multiline REPL.
+        prompt> a
+      EOC
+    end
+
     def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content
-- 
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