Rakefile in ZenTest-3.7.2 vs Rakefile in ZenTest-3.8.0

@@ -49,7 +49,19 @@
   ensure
     sh 'rm x y'
   end
 end
 
+task :rcov_info do
+  ruby "-Ilib -S rcov --text-report --save coverage.info test/test_*.rb"
+end
+
+task :rcov_overlay do
+  rcov, eol = Marshal.load(File.read("coverage.info")).last[ENV["FILE"]], 1
+  puts rcov[:lines].zip(rcov[:coverage]).map { |line, coverage|
+    bol, eol = eol, eol + line.length
+    [bol, eol, "#ffcccc"] unless coverage
+  }.compact.inspect
+end
+
 # vim:syntax=ruby