handle nil properties in iis_site (#3040)

* return nil instead of trying to index into nil
* fix typo
* add spec for deleted site

Signed-off-by: Tor Magnus Rakvåg <tm@intility.no>

lib/resources/iis_site.rb

@@ -40,19 +40,19 @@ module Inspec::Resources
     end
 
     def app_pool
-      iis_site[:app_pool]
+      iis_site.nil? ? nil : iis_site[:app_pool]
     end
 
     def bindings
-      iis_site[:bindings]
+      iis_site.nil? ? nil : iis_site[:bindings]
     end
 
     def state
-      iis_site[:state]
+      iis_site.nil? ? nil : iis_site[:state]
     end
 
     def path
-      iis_site[:path]
+      iis_site.nil? ? nil : iis_site[:path]
     end
 
     def exists?

test/integration/default/controls/iis_site_spec.rb

@@ -33,10 +33,19 @@ describe iis_website('Default Web Site') do
 end
 
 describe iis_app('/TestApp', 'Default Web Site') do
-  it { sould exist }
+  it { should exist }
   it { should have_application_pool('DefaultAppPool') }
   it { should have_protocols('http') }
   it { should have_site_name('Default Web Site') }
   it { should have_physical_path('C:\\inetpub\\wwwroot\\Test') }
   it { should have_path('\\TestApp') }
 end
+
+# test testing a non existing website
+describe iis_site('DeletedSite') do
+  it { should_not exist }
+  its('app_pool') { should eq nil }
+  its('bindings') { should eq nil }
+  its('state') { should eq nil }
+  its('path') { should eq nil }
+end