Add new test for Reline within pipe

lib/reline.rb

@@ -220,6 +220,8 @@ module Reline
   private_class_method def self.test_mode
     remove_const('IOGate') if const_defined?('IOGate')
     const_set('IOGate', Reline::GeneralIO)
+    @@config.instance_variable_set(:@test_mode, true)
+    @@config.reset
   end
 
   def self.input=(val)

lib/reline/config.rb

@@ -1,6 +1,8 @@
 require 'pathname'
 
 class Reline::Config
+  attr_reader :test_mode
+
   DEFAULT_PATH = Pathname.new(Dir.home).join('.inputrc')
 
   VARIABLE_NAMES = %w{
@@ -48,6 +50,7 @@ class Reline::Config
     @key_actors[:vi_command] = Reline::KeyActor::ViCommand.new
     @history_size = 500
     @keyseq_timeout = 500
+    @test_mode = false
   end
 
   def reset
@@ -75,6 +78,7 @@ class Reline::Config
   end
 
   def read(file = DEFAULT_PATH)
+    return if @test_mode
     file = ENV['INPUTRC'] if ENV['INPUTRC']
     begin
       if file.respond_to?(:readlines)

test/reline/test_within_pipe.rb

@@ -0,0 +1,24 @@
+require_relative 'helper'
+
+class Reline::WithinPipeTest < Reline::TestCase
+  def setup
+    Reline.send(:test_mode)
+    @reader, @writer = IO.pipe((RELINE_TEST_ENCODING rescue Encoding.default_external))
+    Reline.input = @reader
+    @config = Reline.class_variable_get(:@@config)
+    @line_editor = Reline.class_variable_get(:@@line_editor)
+  end
+
+  def teardown
+    Reline.input = STDIN
+    Reline.output = STDOUT
+    @reader.close
+    @writer.close
+    @config.reset
+  end
+
+  def test_simple_input
+    @writer.write("abc\n")
+    assert_equal 'abc', Reline.readmultiline(&proc{ true })
+  end
+end