pygtk: use new test DSL

Formula/pygtk.rb

@@ -38,47 +38,45 @@ class Pygtk < Formula
     "python" + `python -c 'import sys;print(sys.version[:3])'`.strip
   end
 
-  def test
-    mktemp do
-      (Pathname.pwd+'test.py').write <<-EOS.undent
-        #!/usr/bin/env python
-        import pygtk
-        pygtk.require('2.0')
-        import gtk
+  test do
+    (testpath/'test.py').write <<-EOS.undent
+      #!/usr/bin/env python
+      import pygtk
+      pygtk.require('2.0')
+      import gtk
 
-        class HelloWorld(object):
-            def hello(self, widget, data=None):
-                print "Hello World"
+      class HelloWorld(object):
+          def hello(self, widget, data=None):
+              print "Hello World"
 
-            def delete_event(self, widget, event, data=None):
-                print "delete event occurred"
-                return False
+          def delete_event(self, widget, event, data=None):
+              print "delete event occurred"
+              return False
 
-            def destroy(self, widget, data=None):
-                print "destroy signal occurred"
-                gtk.main_quit()
+          def destroy(self, widget, data=None):
+              print "destroy signal occurred"
+              gtk.main_quit()
 
-            def __init__(self):
-                self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
-                self.window.connect("delete_event", self.delete_event)
-                self.window.connect("destroy", self.destroy)
-                self.window.set_border_width(10)
-                self.button = gtk.Button("Hello World")
-                self.button.connect("clicked", self.hello, None)
-                self.button.connect_object("clicked", gtk.Widget.destroy, self.window)
-                self.window.add(self.button)
-                self.button.show()
-                self.window.show()
+          def __init__(self):
+              self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
+              self.window.connect("delete_event", self.delete_event)
+              self.window.connect("destroy", self.destroy)
+              self.window.set_border_width(10)
+              self.button = gtk.Button("Hello World")
+              self.button.connect("clicked", self.hello, None)
+              self.button.connect_object("clicked", gtk.Widget.destroy, self.window)
+              self.window.add(self.button)
+              self.button.show()
+              self.window.show()
 
-            def main(self):
-                gtk.main()
+          def main(self):
+              gtk.main()
 
-        if __name__ == "__main__":
-            hello = HelloWorld()
-            hello.main()
-      EOS
-      system "chmod +x test.py"
-      system "./test.py"
-    end
+      if __name__ == "__main__":
+          hello = HelloWorld()
+          hello.main()
+    EOS
+    chmod '+x', 'test.py'
+    system "./test.py"
   end
 end