Add utility_spec.rb

spec/lib/metasploit/framework/obfuscation/crandomizer/utility_spec.rb

@@ -4,12 +4,44 @@ require 'metasploit/framework/obfuscation/crandomizer/utility'
 RSpec.describe Metasploit::Framework::Obfuscation::CRandomizer::Utility do
 
   describe '#self.rand_int' do
+    it 'returns an integer' do
+      int = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_int
+      expect(int.class).to eq(Integer)
+    end
+
+    it 'returns a random integer' do
+      int_1 = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_int
+      int_2 = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_int
+      expect(int_2).not_to eq(int_1)
+    end
   end
 
   describe '#self.rand_string' do
+    it 'returns a string' do
+      s = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_string
+      expect(s.class).to eq(String)
+    end
+
+    it 'returns a random string' do
+      s_1 = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_string
+      s_2 = Metasploit::Framework::Obfuscation::CRandomizer::Utility.rand_string
+      expect(s_2).not_to eq(s_1)
+    end
   end
 
   describe '#self.parse' do
+    let(:c_code) {
+      %Q|
+      int main() {
+        const char* s = "This is a test";
+        return 0;
+      }|
+    }
+
+    it 'returns a Metasploit::C::Parser object' do
+      p = Metasploit::Framework::Obfuscation::CRandomizer::Utility.parse(c_code)
+      expect(p.class).to eq(Metasm::C::Parser)
+    end
   end
 
 end