Use minitest, specify the dependency in the gemspec

Use https rubygems url in gemfile

Add instructions to run tests to readme

Gemfile

@@ -1,4 +1,4 @@
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 # Specify your gem's dependencies in language_list.gemspec
 gemspec

README.md

@@ -15,6 +15,10 @@ A list of languages based upon ISO-639-1 and ISO-639-3 with functions to retriev
     english.iso_639_3.inspect #=> "eng"
     english.common? #=> true
 
+## Testing
+
+    rake
+
 ## Thanks
 Thanks goes to Steve Hardie for his work on creating a list of common languages (http://stevehardie.com/2009/10/list-of-common-languages/).
 

Rakefile

@@ -1,2 +1,10 @@
 require 'bundler'
 Bundler::GemHelper.install_tasks
+
+require 'rake/testtask'
+Rake::TestTask.new do |t|
+  t.test_files = FileList['test/language_list_test.rb']
+  t.verbose = true
+end
+
+task :default => :test

language_list.gemspec

@@ -18,4 +18,5 @@ Gem::Specification.new do |s|
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
+  s.add_development_dependency 'minitest'
 end

test/language_list_test.rb

@@ -1,10 +1,7 @@
-#!/usr/bin/env ruby
-
-$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib')))
-require 'test/unit'
+require 'minitest/autorun'
 require 'language_list'
 
-class LanguageListTest < Test::Unit::TestCase
+class LanguageListTest < Minitest::Test
   def test_all_languages
     assert_equal 7707, LanguageList::ALL_LANGUAGES.length
   end