Setup rake test and run it on Travis

Author: k0kubun

.travis.yml

@@ -1,4 +1,5 @@
 language: ruby
+cache: bundler
 rvm:
   - 2.1 # git.ruby-lang.org is debian 8 (jessie), ruby 2.1.5p273
 branches:
@@ -22,3 +23,4 @@ script:
       $(git rev-parse HEAD^) $(git rev-parse HEAD) refs/heads/master \
       --viewer-uri "https://github.com/ruby/ruby/commit/" \
       --error-to [email protected]
+  - bundle exec rake test

Gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gem 'rake'
+gem 'test-unit'

Gemfile.lock

@@ -0,0 +1,17 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    power_assert (1.1.4)
+    rake (12.3.3)
+    test-unit (3.3.3)
+      power_assert
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rake
+  test-unit
+
+BUNDLED WITH
+   1.17.2

Rakefile

@@ -0,0 +1,9 @@
+require 'bundler/setup'
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.libs << 'lib' << 'test'
+  t.test_files = Dir.glob('test/**/*.rb')
+end
+
+task default: :test