Add yamatanooroti rendering test

Rakefile

@@ -15,7 +15,7 @@ ENCODING_LIST.each_pair do |task_name, encoding|
     t.libs << 'test'
     t.libs << 'lib'
     t.loader = :direct
-    t.pattern = 'test/reline/**/test_*.rb'
+    t.pattern = 'test/reline/test_*.rb'
   end
 end
 

test/reline/yamatanooroti/test_rendering.rb

@@ -0,0 +1,37 @@
+begin
+  require 'yamatanooroti'
+
+  class Yamatanooroti::TestMultiplatform < Yamatanooroti::TestCase
+    def setup
+      inputrc_backup = ENV['INPUTRC']
+      ENV['INPUTRC'] = 'nonexistent_file'
+      start_terminal(5, 30, %w{ruby -Ilib bin/multiline_repl})
+      sleep 0.5
+      ENV['INPUTRC'] = inputrc_backup
+    end
+
+    def test_history_back
+      write(":a\n")
+      write("\C-p")
+      close
+      assert_screen(<<~EOC)
+        Multiline REPL.
+        prompt> :a
+        => :a
+        prompt> :a
+      EOC
+    end
+
+    def test_backspace
+      write(":abc\C-h\n")
+      close
+      assert_screen(<<~EOC)
+        Multiline REPL.
+        prompt> :ab
+        => :ab
+        prompt>
+      EOC
+    end
+  end
+rescue LoadError, NameError # yamatanooroti gem not found
+end