new file.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/test_pty.rb

@@ -0,0 +1,46 @@
+require 'test/unit'
+require_relative 'ruby/envutil'
+require 'shellwords'
+
+begin
+  require 'pty'
+rescue LoadError
+end
+
+class TestPTY < Test::Unit::TestCase
+  RUBY = EnvUtil.rubybin
+
+  def test_spawn_without_block
+    r, w, pid = PTY.spawn(RUBY, '-e', 'puts "a"')
+    assert_equal("a\r\n", r.gets)
+    assert_raise(Errno::EIO) { r.gets }
+  ensure
+    Process.wait pid if pid
+  end
+
+  def test_spawn_with_block
+    PTY.spawn(RUBY, '-e', 'puts "b"') {|r,w,pid|
+      assert_equal("b\r\n", r.gets)
+      Process.wait(pid)
+      assert_raise(Errno::EIO) { r.gets }
+    }
+  end
+
+  def test_commandline
+    commandline = Shellwords.join([RUBY, '-e', 'puts "foo"'])
+    PTY.spawn(commandline) {|r,w,pid|
+      assert_equal("foo\r\n", r.gets)
+      Process.wait(pid)
+      assert_raise(Errno::EIO) { r.gets }
+    }
+  end
+
+  def test_argv0
+    PTY.spawn([RUBY, "argv0"], '-e', 'puts "bar"') {|r,w,pid|
+      assert_equal("bar\r\n", r.gets)
+      Process.wait(pid)
+      assert_raise(Errno::EIO) { r.gets }
+    }
+  end
+end if defined? PTY
+