# Test Coverage Tool for TDD?

**URL:** <https://www.ruby-forum.com/t/test-coverage-tool-for-tdd/150690>\
**Category:** Rails\
**Created:** [October 11, 2008, 4:40pm UTC](https://www.ruby-forum.com/t/test-coverage-tool-for-tdd/150690 "2008-10-11T16:40:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Hunt\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b9e5f3/32.png) [@Hunt\_J](https://www.ruby-forum.com/u/Hunt_J)\
**Post date:** [October 11, 2008, 4:40pm UTC](https://www.ruby-forum.com/t/test-coverage-tool-for-tdd/150690/1 "2008-10-11T16:40:35Z")

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Hi,

I’m learning TDD without using Shoulda or RSpec. When I played with  
RSpec, there was a tool to show test coverage visually.

Is there any similar function built-in to Rails Test::Unit?  
Or do I need to add it on my own?  
What’s the recommended tool?

I tried `rake -T test`, but didn’t find anything about coverage.

-Jon

---

<div class="post-metadata">

**Author:** ![Hunt\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/b9e5f3/32.png) [@Hunt\_J](https://www.ruby-forum.com/u/Hunt_J)\
**Post date:** [October 11, 2008, 5:02pm UTC](https://www.ruby-forum.com/t/test-coverage-tool-for-tdd/150690/2 "2008-10-11T17:02:49Z")

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Yup, it’s called rcov: [eigenclass.org](http://eigenclass.org/hiki.rb?rcov)

–Jeremy

On Sat, Oct 11, 2008 at 9:40 AM, Hunt J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> I tried `rake -T test`, but didn’t find anything about coverage.
> 
> -Jon
> 
> >

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