return boolean options set

spec/yawpa_spec.rb

@@ -15,5 +15,19 @@ describe Yawpa do
       params = ['one', '--option', 'two']
       expect { Yawpa.parse(params, options) }.to raise_error
     end
+
+    it "returns boolean options which are set" do
+      options = {
+        one: {},
+        two: {},
+        three: {},
+      }
+      params = ['--one', 'arg', '--two', 'arg2']
+      opts, args = Yawpa.parse(params, options)
+      opts.include?(:one).should be_true
+      opts.include?(:two).should be_true
+      opts.include?(:three).should be_false
+      args.should eq(['arg', 'arg2'])
+    end
   end
 end