test: tty option

* bootstraptest/runner.rb (main): add --tty option to output like
  terminal, for mingw/mswin on cygwin.

* lib/test/unit.rb (Test::Unit::Options#setup_options): ditto.

* sample/test.rb (Progress#initialize): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38821 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bootstraptest/runner.rb

@@ -62,6 +62,7 @@ def main
   @verbose = false
   $stress = false
   @color = nil
+  @tty = nil
   @quiet = false
   dir = nil
   quiet = false
@@ -87,6 +88,10 @@ def main
       warn "unknown --color argument: #$3" if $3
       @color = $1 ? nil : !$2
       true
+    when /\A--tty(=(?:yes|(no)|(.*)))?\z/
+      warn "unknown --tty argument: #$3" if $3
+      @tty = !$1 || !$2
+      true
     when /\A(-q|--q(uiet))\z/
       quiet = true
       @quiet = true
@@ -123,7 +128,7 @@ End
 
   @progress = %w[- \\ | /]
   @progress_bs = "\b" * @progress[0].size
-  @tty = $stderr.tty?
+  @tty = $stderr.tty? if @tty.nil?
   case @color
   when nil
     @color = @tty && /dumb/ !~ ENV["TERM"]

lib/test/unit.rb

@@ -129,6 +129,12 @@ module Test
                 "colorize the output.  WHEN defaults to 'always'", "or can be 'never' or 'auto'." do |c|
           options[:color] = c || :always
         end
+
+        opts.on '--tty[=WHEN]',
+                [:yes, :no],
+                "force to output tty control.  WHEN defaults to 'yes'", "or can be 'no'." do |c|
+          @tty = c != :no
+        end
       end
 
       def non_options(files, options)

sample/test.rb

@@ -7,6 +7,7 @@ $failed = 0
 class Progress
   def initialize
     @color = nil
+    @tty = nil
     @quiet = nil
     @verbose = nil
     ARGV.each do |arg|
@@ -14,13 +15,17 @@ class Progress
       when /\A--color(?:=(?:always|(auto)|(never)|(.*)))?\z/
         warn "unknown --color argument: #$3" if $3
         @color = $1 ? nil : !$2
+      when /\A--tty(=(?:yes|(no)|(.*)))?\z/
+        warn "unknown --tty argument: #$3" if $3
+        @tty = !$1 || !$2
+        true
       when /\A-(q|-quiet)\z/
         @quiet = true
       when /\A-(v|-verbose)\z/
         @verbose = true
       end
     end
-    @tty = STDERR.tty? && !STDOUT.tty? && /dumb/ !~ ENV["TERM"]
+    @tty = STDERR.tty? && !STDOUT.tty? && /dumb/ !~ ENV["TERM"] if @tty.nil?
     @eol = @tty && !@verbose ? "\r\e[K\r" : "\n"
     case @color
     when nil