diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000000..16f9cdb013
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,2 @@
+--color
+--format documentation
diff --git a/Gemfile b/Gemfile
index 2fcd3c2710..01703f0b04 100755
--- a/Gemfile
+++ b/Gemfile
@@ -2,14 +2,26 @@ source 'http://rubygems.org'
 
 # Need 3+ for ActiveSupport::Concern
 gem 'activesupport', '>= 3.0.0'
+# Needed for Msf::DbManager
+gem 'activerecord'
+# Database models shared between framework and Pro.
+gem 'metasploit_data_models', :git => 'git://github.com/rapid7/metasploit_data_models.git'
 # Needed for module caching in Mdm::ModuleDetails
 gem 'pg', '>= 0.11'
 
 group :development do
-  # running documentation generation tasks
-  gem 'rake'
   # Markdown formatting for yard
   gem 'redcarpet'
   # generating documentation
   gem 'yard'
 end
+
+group :development, :test do
+  # running documentation generation tasks and rspec tasks
+  gem 'rake'
+end
+
+group :test do
+  # testing framework
+  gem 'rspec'
+end
diff --git a/Gemfile.lock b/Gemfile.lock
index 2d7fe0b05b..a666ef8540 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,22 +1,62 @@
+GIT
+  remote: git://github.com/rapid7/metasploit_data_models.git
+  revision: dd6c3a31c5ad8b55f4913b5ba20307178ba9c7bf
+  specs:
+    metasploit_data_models (0.0.2)
+      activerecord
+      activesupport
+      pg
+      pry
+
 GEM
   remote: http://rubygems.org/
   specs:
+    activemodel (3.2.8)
+      activesupport (= 3.2.8)
+      builder (~> 3.0.0)
+    activerecord (3.2.8)
+      activemodel (= 3.2.8)
+      activesupport (= 3.2.8)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
     activesupport (3.2.8)
       i18n (~> 0.6)
       multi_json (~> 1.0)
+    arel (3.0.2)
+    builder (3.0.3)
+    coderay (1.0.8)
+    diff-lcs (1.1.3)
     i18n (0.6.1)
+    method_source (0.8)
     multi_json (1.3.6)
     pg (0.14.1)
+    pry (0.9.10)
+      coderay (~> 1.0.5)
+      method_source (~> 0.8)
+      slop (~> 3.3.1)
     rake (0.9.2.2)
     redcarpet (2.1.1)
+    rspec (2.11.0)
+      rspec-core (~> 2.11.0)
+      rspec-expectations (~> 2.11.0)
+      rspec-mocks (~> 2.11.0)
+    rspec-core (2.11.1)
+    rspec-expectations (2.11.3)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.11.3)
+    slop (3.3.3)
+    tzinfo (0.3.33)
     yard (0.8.2.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  activerecord
   activesupport (>= 3.0.0)
+  metasploit_data_models!
   pg (>= 0.11)
   rake
   redcarpet
+  rspec
   yard
diff --git a/Rakefile b/Rakefile
index d21d5d6ddd..aea3251b40 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,12 @@
 require 'bundler/setup'
 
+require 'rspec/core/rake_task'
 require 'yard'
 
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec
+
 namespace :yard do
   yard_files = [
       # Ruby source files first
diff --git a/lib/msf/core/db_manager.rb b/lib/msf/core/db_manager.rb
index 63783a8005..3c8fcee761 100644
--- a/lib/msf/core/db_manager.rb
+++ b/lib/msf/core/db_manager.rb
@@ -1,6 +1,7 @@
 # -*- coding: binary -*-
 require "active_record"
 
+require 'msf/base/config'
 require 'msf/core'
 require 'msf/core/db'
 require 'msf/core/task_manager'
diff --git a/lib/msf/core/module_manager/module_paths.rb b/lib/msf/core/module_manager/module_paths.rb
index 3c50599fd8..3a87dc04df 100644
--- a/lib/msf/core/module_manager/module_paths.rb
+++ b/lib/msf/core/module_manager/module_paths.rb
@@ -15,24 +15,22 @@ module Msf::ModuleManager::ModulePaths
     nested_paths = []
 
     # remove trailing file separator
-    path.sub!(/#{File::SEPARATOR}$/, '')
+    path_without_trailing_file_separator = path.sub(/#{File::SEPARATOR}$/, '')
 
-    pathname = Pathname.new(path)
+    # Make the path completely canonical
+    pathname = Pathname.new(path_without_trailing_file_separator).expand_path
     extension = pathname.extname
 
     if extension == Msf::Modules::Loader::Archive::ARCHIVE_EXTENSION
       unless pathname.exist?
-        raise RuntimeError, "The path supplied does not exist", caller
+        raise ArgumentError, "The path supplied does not exist", caller
       end
 
-      nested_paths << pathname.expand_path.to_s
+      nested_paths << pathname.to_s
     else
-      # Make the path completely canonical
-      pathname = Pathname.new(path).expand_path
-
       # Make sure the path is a valid directory
       unless pathname.directory?
-        raise RuntimeError, "The path supplied is not a valid directory.", caller
+        raise ArgumentError, "The path supplied is not a valid directory.", caller
       end
 
       nested_paths << pathname.to_s
@@ -41,7 +39,7 @@ module Msf::ModuleManager::ModulePaths
       fastlib_glob = pathname.join('**', "*#{Msf::Modules::Loader::Archive::ARCHIVE_EXTENSION}")
 
       Dir.glob(fastlib_glob).each do |fastlib_path|
-        nested_pathnames << fastlib_path
+        nested_paths << fastlib_path
       end
     end
 
diff --git a/spec/msf/core/module_manager_spec.rb b/spec/msf/core/module_manager_spec.rb
new file mode 100644
index 0000000000..78730a8c66
--- /dev/null
+++ b/spec/msf/core/module_manager_spec.rb
@@ -0,0 +1,110 @@
+require 'spec_helper'
+
+#
+# Core
+#
+
+# Temporary files
+require 'tempfile'
+# add mktmpdir to Dir
+require 'tmpdir'
+
+#
+# Project
+#
+
+require 'msf/core'
+
+describe Msf::ModuleManager do
+  let(:archive_basename) do
+    [basename_prefix, archive_extension]
+  end
+
+  let(:archive_extension) do
+    '.fastlib'
+  end
+
+  let(:basename_prefix) do
+    'rspec'
+  end
+
+  let(:framework) do
+    Msf::Framework.new
+  end
+
+  subject do
+    described_class.new(framework)
+  end
+
+  context '#add_module_path' do
+    it 'should strip trailing File::SEPARATOR from the path' do
+      Dir.mktmpdir do |path|
+        path_with_trailing_separator = path + File::SEPARATOR
+        subject.add_module_path(path_with_trailing_separator)
+
+        subject.send(:module_paths).should_not include(path_with_trailing_separator)
+        subject.send(:module_paths).should include(path)
+      end
+    end
+
+    context 'with Fastlib archive' do
+      it 'should raise an ArgumentError unless the File exists' do
+        file = Tempfile.new(archive_basename)
+        # unlink will clear path, so copy it to a variable
+        path = file.path
+        file.unlink
+
+        File.exist?(path).should be_false
+
+        expect {
+          subject.add_module_path(path)
+        }.to raise_error(ArgumentError, "The path supplied does not exist")
+      end
+
+      it 'should add the path to #module_paths if the File exists' do
+        Tempfile.open(archive_basename) do |temporary_file|
+          path = temporary_file.path
+
+          File.exist?(path).should be_true
+
+          subject.add_module_path(path)
+
+          subject.send(:module_paths).should include(path)
+        end
+      end
+    end
+
+    context 'with directory' do
+      it 'should add path to #module_paths' do
+        Dir.mktmpdir do |path|
+          subject.add_module_path(path)
+
+          subject.send(:module_paths).should include(path)
+        end
+      end
+
+      context 'containing Fastlib archives' do
+        it 'should add each Fastlib archive to #module_paths' do
+          Dir.mktmpdir do |directory|
+            Tempfile.open(archive_basename, directory) do |file|
+              subject.add_module_path(directory)
+
+              subject.send(:module_paths).should include(directory)
+              subject.send(:module_paths).should include(file.path)
+            end
+          end
+        end
+      end
+    end
+
+    context 'with other file' do
+      it 'should raise ArgumentError' do
+        Tempfile.open(basename_prefix) do |file|
+          expect {
+            subject.add_module_path(file.path)
+          }.to raise_error(ArgumentError, 'The path supplied is not a valid directory.')
+        end
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/spec/msf/database_manager_spec.rb b/spec/msf/database_manager_spec.rb
deleted file mode 100644
index 957c1b1bbe..0000000000
--- a/spec/msf/database_manager_spec.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-require "spec_helper"
-
-module Msf
-  describe DBManager do
-    
-  end
-end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3d72003677..f62338294f 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1 +1,24 @@
-require "../lib/msf/core.rb"
+require 'rubygems'
+require 'bundler'
+Bundler.setup(:default, :test)
+
+# add project lib directory to load path
+spec_pathname = Pathname.new(__FILE__).dirname
+root_pathname = spec_pathname.join('..').expand_path
+lib_pathname = root_pathname.join('lib')
+$LOAD_PATH.unshift(lib_pathname.to_s)
+
+require 'rspec/core'
+
+# Requires supporting ruby files with custom matchers and macros, etc,
+# in spec/support/ and its subdirectories.
+support_glob = root_pathname.join('spec', 'support', '**', '*.rb')
+
+Dir.glob(support_glob) do |path|
+  require path
+end
+
+RSpec.configure do |config|
+  config.mock_with :rspec
+end
+