[ruby/reline] Return 1 when char width not found

This fixes ruby/reline#261.

https://github.com/ruby/reline/commit/3cf1213014

1 files changed, 8 insertions, 0 deletions

diff --git a/test/reline/test_key_actor_emacs.rb b/test/reline/test_key_actor_emacs.rb
index b4dc3a1bcb..947685409f 100644
--- a/test/reline/test_key_actor_emacs.rb
+++ b/test/reline/test_key_actor_emacs.rb
@@ -2280,6 +2280,14 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
     assert_line('  12345')
   end
 
+  def test_input_unknown_char
+    input_keys('͸') # U+0378 (unassigned)
+    assert_line('͸')
+    assert_byte_pointer_size('͸')
+    assert_cursor(1)
+    assert_cursor_max(1)
+  end
+
 =begin # TODO: move KeyStroke instance from Reline to LineEditor
   def test_key_delete
     input_keys('ab')