[ruby/reline] Test prompt with escape sequence

https://github.com/ruby/reline/commit/c7c1d5f5d1

test/reline/yamatanooroti/test_rendering.rb

@@ -23,6 +23,7 @@ begin
       Dir.chdir(@pwd)
       FileUtils.rm_rf(@tmpdir)
       ENV['INPUTRC'] = @inputrc_backup
+      ENV.delete('RELINE_TEST_PROMPT') if ENV['RELINE_TEST_PROMPT']
     end
 
     def test_history_back
@@ -197,6 +198,33 @@ begin
       EOC
     end
 
+    def test_prompt_with_escape_sequence
+      ENV['RELINE_TEST_PROMPT'] = "\1\e[30m\2prompt> \1\e[m\2"
+      start_terminal(5, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      write("123\n")
+      close
+      assert_screen(<<~EOC)
+        Multiline REPL.
+        prompt> 123
+        => 123
+        prompt>
+      EOC
+    end
+
+    def test_prompt_with_escape_sequence_and_autowrap
+      ENV['RELINE_TEST_PROMPT'] = "\1\e[30m\2prompt> \1\e[m\2"
+      start_terminal(5, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      write("12345678\n")
+      close
+      assert_screen(<<~EOC)
+        Multiline REPL.
+        prompt> 1234567
+        8
+        => 12345678
+        prompt>
+      EOC
+    end
+
     private def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content