[ruby/irb] Suppress incomplete encoding magic comment error

https://github.com/ruby/irb/commit/443e90af80

1 files changed, 13 insertions, 0 deletions

diff --git a/test/irb/test_ruby_lex.rb b/test/irb/test_ruby_lex.rb
index 367d1e204a..bc5b4feaf7 100644
--- a/test/irb/test_ruby_lex.rb
+++ b/test/irb/test_ruby_lex.rb
@@ -139,5 +139,18 @@ module TestIRB
         assert_indenting(lines, row.new_line_spaces, true)
       end
     end
+
+    def test_incomplete_encoding_magic_comment
+      input_with_correct_indents = [
+        Row.new(%q(#encoding:u), nil, 0),
+      ]
+
+      lines = []
+      input_with_correct_indents.each do |row|
+        lines << row.content
+        assert_indenting(lines, row.current_line_spaces, false)
+        assert_indenting(lines, row.new_line_spaces, true)
+      end
+    end
   end
 end