add rakefile to scaffold for basic test running

lib/rubygems/commands/bootstrap_command.rb

@@ -33,6 +33,7 @@ def write_scaffold
     `mkdir lib test`
     `touch README`
     write_version
+    write_rakefile
   end
 
   def write_version
@@ -41,6 +42,22 @@ def write_version
     version.write
   end
 
+  def write_rakefile
+    rakefile = <<RAKEFILE
+require 'rake'
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.libs << 'lib'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = false
+end
+
+task :default => :test
+RAKEFILE
+    File.open('Rakefile', 'w').write(rakefile)
+  end
+
   def create_repo
     options = { :login => github_user, :token => github_token, :name  => gem_name }
     options = options.map { |name, value| "-F '#{name}=#{value}'" }.join(' ')
@@ -63,4 +80,4 @@ def create_repo
     say 'Pushing to Github'
     `git push origin master`
   end
-end
+end