Test::Unit GTk GUI

While trying to get a "green bar" with Test::Unit using the GTk
option, I experience the following error:

 /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:284:in `set_font': file gdkfont.c: line 236   (gdk_font_ref): assertion `font != NULL' failed. (Gdk::Error)
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:284:in `fault_detail_label'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:280:in `lazy_initialize'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:280:in `fault_detail_label'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:276:in `inner_detail_sub_panel'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:274:in `lazy_initialize'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:274:in `inner_detail_sub_panel'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:270:in `outer_detail_sub_panel'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:268:in `lazy_initialize'
         ... 13 levels...
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:54:in `setup_ui'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:39:in `start'
        from /usr/local/lib/ruby/site_ruby/1.6/test/unit/ui/gtk/testrunner.rb:26:in `run'
        from GuiDuckUT.rb:14
 Loaded suite GuiDuckUT
 Started...
 ...
 Finished in 0.013897 seconds.
 2 runs, 2 assertions, 0 failures, 0 errors

This corresponds to the following method in testrunner.rb,

 def fault_detail_label # :nodoc:
  lazy_initialize(:fault_detail_label) {
   @fault_detail_label = EnhancedLabel.new("")
   style = Gtk::Style.new
   font = Gdk::Font.font_load("-*-Courier New-medium-r-normal--*-120-*-*-*-*-*-*")
   style.set_font(font)      <<<<*** line 284 ***
   @fault_detail_label.set_style(style)
   @fault_detail_label.set_justify(Gtk::JUSTIFY_LEFT)
   @fault_detail_label.set_line_wrap(false) }
 end

I am running RH7.2 with Ruby 1.6.7, GTk 1.2.10, and Ruby-GTk-0.25,
and TestUnit-0.1.4 on the following:

 <file name="GuiDuckUT.rb">
  require 'test/unit'

  class GuiDuckUT < Test::Unit::TestCase
   def testOne
    assert_equal 1, 1
   end
   def testText
    assert_equal 'test', 'test', 'text is the same'
   end
  end

  if $0 == __FILE__ then
    require 'test/unit/ui/gtk/testrunner'
    Test::Unit::UI::GTK::TestRunner.run(GuiDuckUT.suite)
#    require 'test/unit/ui/console/testrunner'
#    Test::Unit::UI::Console::TestRunner.run(GuiDuckUT.suite)
  end
 </file>

The test cases in Ruby-GTk-0.25 all seem to work fine and the
above runs just fine through the Console interface.

-- 
Bil Kleb
NASA Langley Research Center
Hampton, Virginia, USA