Add ReadmeExamplesTest

Gemfile.lock

@@ -10,6 +10,7 @@ GEM
     rake (13.1.0)
     rake-compiler (1.2.7)
       rake
+    test-cmd.rb (0.8.0)
     test-unit (3.6.2)
       power_assert
 
@@ -20,6 +21,7 @@ PLATFORMS
 DEPENDENCIES
   bsdcontrol.rb!
   rake-compiler (~> 1.2)
+  test-cmd.rb (~> 0.8)
   test-unit (~> 3.6)
 
 BUNDLED WITH

bin/run-unprivileged-tests

@@ -2,7 +2,7 @@
 set -e
 if [ $(id -u) -ne 0 ]; then
     rake clean clobber compile
-    for file in test/unprivileged/*_test.rb; do
+    for file in test/readme_examples_test.rb test/unprivileged/*_test.rb; do
         ruby -Ilib ${file} --no-use-color
     done
 else

bsdcontrol.rb.gemspec

@@ -13,4 +13,5 @@ Gem::Specification.new do |gem|
   gem.description = gem.summary
   gem.add_development_dependency "rake-compiler", "~> 1.2"
   gem.add_development_dependency "test-unit", "~> 3.6"
+  gem.add_development_dependency "test-cmd.rb", "~> 0.8"
 end

share/bsdcontrol.rb/examples/1_available_features.rb

@@ -0,0 +1,8 @@
+#!/usr/bin/env ruby
+# Required privileges: user, superuser
+require "bsdcontrol"
+BSD::Control
+  .available_features
+  .each do
+  print "The ", _1.name, " feature is available", "\n"
+end

test/readme_examples_test.rb

@@ -0,0 +1,18 @@
+require_relative "setup"
+
+class ReadmeExamplesTest < Test::Unit::TestCase
+  require "rbconfig"
+  require "test/cmd"
+
+  def test_available_features
+    result = cmd(RbConfig.ruby, readme_example('1_available_features.rb'))
+    assert_equal true, result.status.success?
+    result.each_line { assert_match %r|The [a-zA-Z0-9_]+ feature is available|, _1 }
+  end
+
+  private
+
+  def readme_example(name)
+    File.join(Dir.getwd, 'share', 'bsdcontrol.rb', 'examples', name)
+  end
+end

test/setup.rb

@@ -1,2 +1,3 @@
+require "bundler/setup"
 require "test/unit"
 require "bsdcontrol"