add cmp for Arrays

lib/matchers/matchers.rb

@@ -244,6 +244,7 @@ RSpec::Matchers.define :cmp do |expected|
   end
 
   match do |actual|
+    actual = actual[0] if actual.is_a?(Array) && !expected.is_a?(Array) && actual.length == 1
     # if actual and expected are strings
     if expected.is_a?(String) && actual.is_a?(String)
       actual.casecmp(expected) == 0

test/integration/test/integration/default/compare_matcher_spec.rb

@@ -18,4 +18,15 @@ if os.linux?
     its('LogLevel') { should cmp 'info' }
     its('LogLevel') { should cmp 'InfO' }
   end
+
+  describe passwd.passwords.uniq do
+    it { should eq ['x'] }
+    it { should cmp ['x'] }
+    it { should cmp 'x' }
+  end
+
+  describe passwd.usernames do
+    it { should include 'root' }
+    it { should_not cmp 'root' }
+  end
 end