ruby/ruby — pull request #708 by hsbt (2014-08-31 02:04:50+00:00)
Title: [experimental] test coverage using SimpleCov

I ported simplecov into ruby core for test coverage.

### Usage

```shell
COVERAGE=1 make test-all TESTS=test/cgi
```

it generate test coverage to ```coverage``` direcotory.

### Limitation

* test_coverage.rb and test_process.rb broke test suit with SimpleCov
* some tests failed randomly.

### TODO

* more reduce bundled simplecov(additional configuration, formatter, etc)
* measure rubyspec coverage