rails 3 test case error.on(:field) Vs. errors[:field]

I am working on the Rails 3 Test cases . While writing case i got Deprecation error like

DEPRECATION WARNING: Errors#on have been deprecated, use Errors#[] instead.
Also note that the behaviour of Errors#[] has changed. Errors#[] now always returns an Array. An empty Array is returned when there are no errors on the specified attribute开发者_C百科. (called from on at /usr/local/lib/ruby/gems/1.9.1/gems/activemodel-3.0.0.rc/lib/active_model/deprecated_error_methods.rb:7)

For that i used errors[:field] instead of errors.on(:field) Now Deprecation error is gone , but cases are not working as earlier it was working . It is not testing any validation for the model

Sol

---

Replace:

errors.on(:field)

with:

errors.include?(:field)

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After searching for examples of how to do this without finding anything I ended up doing:

errors[:field].present? /  errors[:field].blank?

Don't know if this is the preferred way but it seems to do the job.

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I am using something like this at the moment:

@hamburger.errors[:ingredients].count.should == 1
@hamburger.errors[:ingredients].should include "Tomatoes are missing dude!"

Hope it helps someone, right now it is the cleanest solution for me.

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I'm converting my old specs to something like this to remove the deprecation warnings:

  model.should have(1).error_on(:field)
  model.should have(:no).errors_on(:field)