[rspec-users] tags and spec_helper

David Chelimsky dchelimsky at gmail.com
Sat Jun 25 09:57:33 EDT 2011

On Jun 24, 2011, at 11:55 AM, Matt Wynne wrote:

> I've been trying to separate out some fast specs in a Rails app in a Gary Bernhardt style[1], and I experimented with using tags.
> The problem with using tags is that in order to scan the specs for examples that match the tags, it loads every spec file, most of which require spec_helper, which loads Rails, and so takes 5-6 seconds. Thereby totally defeating the original purpose.
> One idea I have is to put some if statements into spec_helper to check the tags that were passed to RSpec and only load the rails env if necessary. Is that possible?

What I'm about to tell you is used internally, is not a formal API, and is subject to change without notice. That said, for the moment,  you can do this:

if !RSpec.configuration.inclusion_filter[:no_rails]
  # ... load rails

rspec spec --tag no_rails

I created https://github.com/rspec/rspec-core/issues/416 to address formalizing an API for this. Comments/suggestions/patches welcome.


> Has anyone else tried doing anything like this?
> cheers,
> Matt
> matt at mattwynne.net
> 07974 430184
> [1] https://www.destroyallsoftware.com/screencasts/catalog/fast-tests-with-and-without-rails

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