[ruby/reline] Add a test for suppressing crash when dynamic prompt returns empty

ref. https://github.com/ruby/reline/pull/262

https://github.com/ruby/reline/commit/b98bc3c329

1 files changed, 3 insertions, 0 deletions

diff --git a/test/reline/yamatanooroti/multiline_repl b/test/reline/yamatanooroti/multiline_repl
index f48c1cfbd9..f2efdd4eaf 100755
--- a/test/reline/yamatanooroti/multiline_repl
+++ b/test/reline/yamatanooroti/multiline_repl
@@ -24,6 +24,9 @@ opt.on('--broken-dynamic-prompt') {
     }
   }
 }
+opt.on('--dynamic-prompt-returns-empty') {
+  Reline.prompt_proc = proc { |l| [] }
+}
 opt.on('--auto-indent') {
   AutoIndent.new
 }