- add ceedling/cmock/unity as testing framework and support

- unified makefile project for the whole repos
- new separate project for tests

tests/vendor/ceedling/lib/system_wrapper.rb

@@ -0,0 +1,76 @@
+require 'rbconfig'
+
+class SystemWrapper
+
+  # static method for use in defaults
+  def self.windows?
+    return ((RbConfig::CONFIG['host_os'] =~ /mswin|mingw/) ? true : false) if defined?(RbConfig)
+    return ((Config::CONFIG['host_os'] =~ /mswin|mingw/) ? true : false)
+  end
+
+  # class method so as to be mockable for tests
+  def windows?
+    return SystemWrapper.windows?
+  end
+  
+  def module_eval(string)
+    return Object.module_eval("\"" + string + "\"")
+  end
+
+  def eval(string)
+    return eval(string)
+  end
+
+  def search_paths
+    return ENV['PATH'].split(File::PATH_SEPARATOR)
+  end
+
+  def cmdline_args
+    return ARGV
+  end
+
+  def env_set(name, value)
+    ENV[name] = value
+  end
+  
+  def env_get(name)
+    return ENV[name]
+  end
+
+  def time_now
+    return Time.now.asctime
+  end
+
+  def shell_backticks(command)
+    return {
+      :output    => `#{command}`.freeze,
+      :exit_code => ($?.exitstatus).freeze
+    }
+  end
+
+  def shell_system(command)
+    system( command )
+    return {
+      :output    => ''.freeze,
+      :exit_code => ($?.exitstatus).freeze
+    }
+  end
+  
+  def add_load_path(path)
+    $LOAD_PATH.unshift(path)
+  end
+  
+  def require_file(path)
+    require(path)
+  end
+
+  def ruby_success
+    return ($!.nil? || $!.is_a?(SystemExit) && $!.success?)
+  end
+
+  def constants_include?(item)
+    # forcing to strings provides consistency across Ruby versions
+    return Object.constants.map{|constant| constant.to_s}.include?(item.to_s)
+  end
+  
+end