Rails 4 gem - ActiveSupport - method already defined

Question

I'm trying to make this gem (https://github.com/gshaw/common_validators) Rails 4 compatible and I'm having a bit of a trouble.

Changing gemspec line 22 to spec.add_dependency "rails", ">= 3.2" will generate an error that

app/validators/date_format_validator.rb:8:in `<top (required)>': uninitialized constant ActiveModel (NameError)

Looks like that I have to explicitly require active_record, so I've added require 'active_record' to test_helper.rb.

Now the error received is

/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/activesupport-4.0.2/lib/active_support/testing/declarative.rb:36:in `test': test_invalid_date is already defined in DateFormatValidatorTest (RuntimeError)

Looks like I'm missing something basic, but not sure what. I've tried various things to no avail.

Any thoughts are much appreciated. Thanks!

Answer 1

The only way to make it work was to generate a new rails plugin as described on http://guides.rubyonrails.org/plugins.html and use the test framework from there.