Add rspec for fake_function_spec.rb

spec/lib/metasploit/framework/obfuscation/crandomizer/code_factory/fake_function_spec.rb

@@ -0,0 +1,40 @@
+require 'metasploit/framework/obfuscation/crandomizer/code_factory/fake_function'
+
+RSpec.describe Metasploit::Framework::Obfuscation::CRandomizer::CodeFactory::FakeFunction do
+  let(:function_name) do
+    'test'
+  end
+
+  subject(:fake_function) do
+    described_class.new(function_name)
+  end
+
+  describe '#initialize' do
+    it 'sets attribute' do
+      expect(subject.attribute.class).to eq(String)
+    end
+
+    it 'sets a return type' do
+      expect(subject.return_type.class).to eq(String)
+    end
+
+    it 'sets an argument type' do
+      expect(subject.args.class).to eq(String)
+    end
+
+    it 'sets function name' do
+      expect(subject.function_name).to eq(function_name)
+    end
+  end
+
+  describe '#generate_body' do
+    it 'contains a return type' do
+      return_type = subject.return_type
+      expect(subject.generate_body).to match(/#{return_type}/)
+    end
+
+    it 'contains a function name' do
+      expect(subject.generate_body).to match(/#{function_name}/)
+    end
+  end
+end