add unit tests

lib/resources/sys_info.rb

@@ -11,15 +11,15 @@ module Inspec::Resources
       end
     "
 
+    # returns the hostname of the local system
     def hostname
       os = inspec.os
       if os.linux?
         inspec.command('hostname').stdout.chomp
       elsif os.windows?
-        # windows hostname
         inspec.powershell('$env:computername').stdout.chomp
       else
-        return skip_resource 'The `system` resource is not supported on your OS yet.'
+        skip_resource 'The `sys_info.hostname` resource is not supported on your OS yet.'
       end
     end
   end

test/helper.rb

@@ -254,6 +254,10 @@ class MockLoader
       'netstat -an -f inet' => cmd.call('hpux-netstat-inet'),
       #ipv6 ports on hpux
       'netstat -an -f inet6' => cmd.call('hpux-netstat-inet6'),
+      # hostname linux
+      'hostname' => cmd.call('hostname'),
+      # hostname windows
+      '$env:computername' => cmd.call('$env-computername'),
     }
 
     @backend

test/unit/mock/cmd/$env-computername

@@ -0,0 +1 @@
+WIN-CIV7VMLVHLD

test/unit/mock/cmd/hostname

@@ -0,0 +1 @@
+example.com

test/unit/resources/sys_info_test.rb

@@ -0,0 +1,25 @@
+# encoding: utf-8
+# author: Christoph Hartmann
+# author: Dominik Richter
+
+require 'helper'
+require 'inspec/resource'
+
+describe 'Inspec::Resources::SysInfo' do
+  describe 'sys_info' do
+    it 'check ssh config parsing for Ubuntu' do
+      resource = MockLoader.new(:ubuntu1504).load_resource('sys_info')
+      _(resource.hostname).must_equal 'example.com'
+    end
+
+    it 'check ssh config parsing for Ubuntu' do
+      resource = MockLoader.new(:windows).load_resource('sys_info')
+      _(resource.hostname).must_equal 'WIN-CIV7VMLVHLD'
+    end
+
+    it 'check ssh config parsing for freebsd' do
+      resource = MockLoader.new(:freebsd10).load_resource('sys_info')
+      _(resource.hostname).must_equal 'The `sys_info.hostname` resource is not supported on your OS yet.'
+    end
+  end
+end