Added rcov to the mix.

.gitignore

@@ -2,3 +2,4 @@
 test.db
 factory_girl-*.gem
 rdoc
+coverage

Rakefile

@@ -3,6 +3,7 @@ require 'rake'
 require 'rake/testtask'
 require 'rake/rdoctask'
 require 'rake/gempackagetask'
+require 'rcov/rcovtask'
 require 'date'
 
 desc 'Default: run unit tests.'
@@ -15,6 +16,13 @@ Rake::TestTask.new(:test) do |t|
   t.verbose = true
 end
 
+desc 'Performs code coverage on the factory_girl plugin.'
+Rcov::RcovTask.new do |t|
+  t.libs << "test"
+  t.test_files = FileList['test/*_test.rb']
+  t.verbose = true
+end
+
 desc 'Generate documentation for the factory_girl plugin.'
 Rake::RDocTask.new(:rdoc) do |rdoc|
   rdoc.rdoc_dir = 'rdoc'