Use test-unit gem for test (#19)

* Use test-unit and CoreAssertions instead of deep copy from ruby core repository

* Added helper file for CoreAssertions with test-unit

* Use Gemfile instead of Gem::Specification#add_development_dependency.

* Use pend instead of skip

* Extract load path for Windows

* Update the latest version of CoreAssertions

Author: hsbt

Gemfile

@@ -1,4 +1,7 @@
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in strscan.gemspec
 gemspec
+
+gem "rake-compiler"
+gem "benchmark-driver"
+gem "test-unit"

Rakefile

@@ -8,7 +8,7 @@ Rake::ExtensionTask.new("strscan")
 
 desc "Run test"
 task :test do
-  ENV["RUBYOPT"] = "-Ilib"
+  ENV["RUBYOPT"] = "-Ilib -Itest/lib -rbundler/setup -rhelper"
   ruby("run-test.rb")
 end
 
@@ -18,3 +18,10 @@ task :benchmark do
        "benchmark-driver",
        "benchmark/scan.yaml")
 end
+
+task :sync_tool do
+  require 'fileutils'
+  FileUtils.cp "../ruby/tool/lib/test/unit/core_assertions.rb", "./test/lib"
+  FileUtils.cp "../ruby/tool/lib/envutil.rb", "./test/lib"
+  FileUtils.cp "../ruby/tool/lib/find_executable.rb", "./test/lib"
+end

strscan.gemspec

@@ -25,8 +25,4 @@ Gem::Specification.new do |s|
   s.email = [nil, "kou@cozmixng.org"]
   s.homepage = "https://github.com/ruby/strscan"
   s.licenses = ["Ruby", "BSD-2-Clause"]
-
-  s.add_development_dependency "rake-compiler"
-  s.add_development_dependency "benchmark-driver"
-  s.add_development_dependency "test-unit"
 end