set up rspec environment

Rakefile

@@ -1,5 +1,7 @@
 require "bundler/gem_tasks"
 require "rake/clean"
+require "rspec/core/rake_task"
+require "rdoc/task"
 require "yard"
 
 CLEAN.include "doc"
@@ -7,3 +9,13 @@ CLEAN.include "doc"
 YARD::Rake::YardocTask.new do |yard|
   yard.files = ['lib/**/*.rb']
 end
+
+RSpec::Core::RakeTask.new("spec")
+
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title = "Ruby library for extracting data from GnuCash data files"
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end
+
+task :default => :spec