diff --git a/spec/tools/jsobfu_spec.rb b/spec/tools/jsobfu_spec.rb
new file mode 100644
index 0000000000..c683c428df
--- /dev/null
+++ b/spec/tools/jsobfu_spec.rb
@@ -0,0 +1,73 @@
+load Metasploit::Framework.root.join('tools/jsobfu.rb').to_path
+
+require 'stringio'
+
+describe Jsobfu do
+
+  let(:fname) {
+    'test.js'
+  }
+
+  let(:js) {
+    %Q|alert("test");|
+  }
+
+  describe Jsobfu::Driver do
+
+    subject do
+      Jsobfu::Driver.new
+    end
+
+    describe '#run' do
+
+      def get_stdout(&block)
+        out = $stdout
+        $stdout = fake = StringIO.new
+        begin
+          yield
+        ensure
+          $stdout = out
+        end
+        fake.string
+      end
+
+      let(:default_opts) {
+        { :input => fname, :iteration => 1 }
+      }
+
+      before(:each) do
+        allow(Jsobfu::OptsConsole).to receive(:parse).with(any_args).and_return(default_opts)
+        allow(File).to receive(:open).with(fname, 'rb').and_yield(StringIO.new(js))
+      end
+
+      context 'when a javascript file is given' do
+        it 'returns the obfuscated version of the js code' do
+          output = get_stdout { subject.run }
+          expect(output).to include('String.fromCharCode')
+        end
+      end
+
+    end
+  end
+
+
+  describe Jsobfu::OptsConsole do
+    subject do
+      Jsobfu::OptsConsole
+    end
+
+    context 'when no options are given' do
+      it 'raises OptionParser::MissingArgument' do
+        expect{subject.parse([])}.to raise_error(OptionParser::MissingArgument)
+      end
+    end
+
+    context 'when -t isn\'t a number' do
+      it 'raises OptionParser::MissingArgument' do
+        args = "-i #{fname} -t NaN".split
+        expect{subject.parse(args)}.to raise_error(OptionParser::InvalidOption)
+      end
+    end
+  end
+
+end