WpPlugin::Vulnerable specs

spec/shared_examples/wp_item_vulnerable.rb

@@ -2,17 +2,19 @@
 
 shared_examples 'WpItem::Vulnerable' do
 
-  # 3 variables have to be set in the described class or subject:
-  #  let(:vulns_file)     { }
-  #  let(:vulns_xpath)    { }
-  #  let(:expected_vulns) { } The expected Vulnerabilities when using vulns_file and vulns_xpath
+  # 2 variables have to be set in the described class or subject:
+  #   let(:vulns_file)     { }
+  #   let(:expected_vulns) { } The expected Vulnerabilities when using vulns_file and vulns_xpath
+  #
+  # 1 variable is optional, used if supplied, otherwise subject.vulns_xpath is used
+  #   let(:vulns_xpath)    { }
 
   describe '#vulnerabilities' do
     let(:empty_file) { MODELS_FIXTURES + '/wp_item/vulnerable/empty.xml' }
 
     after do
       subject.vulns_file  = @vulns_file
-      subject.vulns_xpath = vulns_xpath
+      subject.vulns_xpath = vulns_xpath if defined?(vulns_xpath)
 
       result = subject.vulnerabilities
       result.should be_a Vulnerabilities