Use minitest instead of test-unit

Gemfile

@@ -1,8 +1,6 @@
 source 'https://rubygems.org'
 gemspec
 
-gem 'test-unit'
-
 group :benchmark do
   gem "remix-stash", '~> 1.1.3'
   gem "dalli"

Gemfile.lock

@@ -13,16 +13,14 @@ GEM
     i18n (0.6.0)
     memcache-client (1.8.5)
     metaclass (0.0.4)
+    minitest (5.3.3)
     mocha (1.0.0)
       metaclass (~> 0.0.1)
     multi_json (1.3.6)
-    power_assert (0.2.7)
     rake (0.9.2.2)
     rake-compiler (0.9.5)
       rake
     remix-stash (1.1.3)
-    test-unit (3.1.5)
-      power_assert
 
 PLATFORMS
   ruby
@@ -32,11 +30,11 @@ DEPENDENCIES
   dalli
   memcache-client
   memcached!
+  minitest
   mocha
   rake
   rake-compiler
   remix-stash (~> 1.1.3)
-  test-unit
 
 BUNDLED WITH
    1.10.6

memcached.gemspec

@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
   s.licenses = ["Academic Free License 3.0 (AFL-3.0)"]
 
   s.add_development_dependency 'rake'
+  s.add_development_dependency 'minitest'
   s.add_development_dependency 'mocha'
   s.add_development_dependency 'activesupport'
   s.add_development_dependency "rake-compiler"

test/test_helper.rb

@@ -1,7 +1,6 @@
 require 'memcached'
 
-require 'test/unit'
-require 'test/unit/assertions'
-require 'mocha/test_unit'
+require "minitest/autorun"
+require 'mocha/mini_test'
 
 #require_relative 'setup'

test/unit/client_initialize_test.rb

@@ -1,6 +1,6 @@
 require 'test_helper'
 
-class ClientInitializeTest < Test::Unit::TestCase
+class ClientInitializeTest < Minitest::Test
 
   def setup
     @servers = ['localhost:43042', 'localhost:43043']
@@ -84,9 +84,9 @@ class ClientInitializeTest < Test::Unit::TestCase
 #  end
 
   def test_initialize_with_invalid_server_strings
-    assert_raise(ArgumentError) { Memcached::Client.new ":43042" }
-    assert_raise(ArgumentError) { Memcached::Client.new "localhost:memcached" }
-    assert_raise(ArgumentError) { Memcached::Client.new "local host:43043:1" }
+    assert_raises(ArgumentError) { Memcached::Client.new ":43042" }
+    assert_raises(ArgumentError) { Memcached::Client.new "localhost:memcached" }
+    assert_raises(ArgumentError) { Memcached::Client.new "local host:43043:1" }
   end
 
 #  def test_initialize_with_invalid_options
@@ -184,7 +184,7 @@ class ClientInitializeTest < Test::Unit::TestCase
 #  end
 
   def test_initialize_strange_argument
-    assert_raise(ArgumentError) { Memcached::Client.new 1 }
+    assert_raises(ArgumentError) { Memcached::Client.new 1 }
   end