Add spec to ensure gem loads without error.

spec/lib/rex/exploitation/jsobfu_spec.rb

@@ -2,50 +2,28 @@ require 'spec_helper'
 require 'rex/exploitation/jsobfu'
 
 describe Rex::Exploitation::JSObfu do
+  TEST_JS = %Q|
+    function x() {
+      alert('1');
+    };
+
+    x();
+  |
 
   subject(:jsobfu) do
-    described_class.new("")
+    described_class.new(TEST_JS)
   end
 
-  describe '#random_var_name' do
-    subject(:random_var_name) { jsobfu.random_var_name }
-
-    it { should be_a String }
-    it { should_not be_empty }
-
-    it 'is composed of _, $, alphanumeric chars' do
-      20.times { expect(jsobfu.random_var_name).to match(/\A[a-zA-Z0-9$_]+\Z/) }
+  describe '#obfuscate' do
+    
+    it 'returns a #to_s object' do
+      expect(jsobfu.obfuscate.to_s).to be_a(String)
     end
 
-    it 'does not start with a number' do
-      20.times { expect(jsobfu.random_var_name).not_to match(/\A[0-9]/) }
+    it 'returns a non-empty String' do
+      expect(jsobfu.obfuscate.to_s).not_to be_empty
     end
 
-    context 'when a reserved word is generated' do
-      let(:reserved)  { described_class::RESERVED_KEYWORDS.first }
-      let(:random)    { 'abcdef' }
-      let(:generated) { [reserved, reserved, reserved, random] }
-
-      before do
-        jsobfu.stub(:random_string) { generated.shift }
-      end
-
-      it { should be random }
-    end
-
-    context 'when a non-unique random var is generated' do
-      let(:preexisting) { 'preexist' }
-      let(:random)      { 'abcdef' }
-      let(:vars)        { { 'jQuery' => preexisting } }
-      let(:generated)   { [preexisting, preexisting, preexisting, random] }
-
-      before do
-        jsobfu.stub(:random_string) { generated.shift }
-        jsobfu.instance_variable_set("@vars", vars)
-      end
-
-      it { should be random }
-    end
   end
 
 end