fix broken tests, use returns instead of yields

lib/puppet/provider/package/pkgng.rb

@@ -12,7 +12,7 @@ Puppet::Type.type(:package).provide :pkgng, :parent => Puppet::Provider::Package
     begin
       output = pkg(['info','-a'])
 
-      if output == nil
+      unless output
         return packages
       end
 

spec/unit/puppet/provider/pkgng_spec.rb

@@ -25,17 +25,32 @@ describe provider_class do
     end
 
     it "should return the empty set if no packages are listed" do
-      provider_class.expects(:pkg).with(['info','-a']).yields('')
+      provider_class.expects(:pkg).with(['info','-a']).returns('')
       provider_class.instances.should be_empty
     end
 
     it "should return all packages when invoked" do
       fixture = File.read('spec/fixtures/pkg.info')
-      provider_class.expects(:pkg).with(['info','-a']).yields(fixture)
+      provider_class.expects(:pkg).with(['info','-a']).returns(fixture)
       provider_class.instances.map(&:name).sort.should ==
         %w{GeoIP ca_root_nss curl nginx nmap openldap-sasl-client pkg postfix ruby sudo tmux vim-lite zfs-stats zsh}.sort
     end
   end
 
+  context "#install" do
+    it "should fail if pkg.conf is not readable" do
+    end
+  end
+
+  context "#query" do
+    it "should return the installed version if present" do
+    end
+
+    it "should return nothing if not present" do
+      #provider.resource[:name] = 'bash'
+      #provider.expects(:pkg).with('zsh').returns('')
+    end
+  end
+
 end