'Convert RSpec 2 "to have().errors_on" matcher to RSpec 3

In my Gemfile

gem 'rspec-rails', '~> 3.3'

I figured out, that the errors_on matcher moved to another gem: https://github.com/rspec/rspec-collection_matchers

I'm positive that there must a way to achieve the same within RSpec 3.

How can I convert the RSpec 2 have().errors_on matcher to RSpec 3?

  expect {
    click_button(I18n.t('helpers.submit.accounting.update'))
  }.to have(4).errors_on(:share_ksk, :central_office, :limit_value, :fix_disagio)

I tried:

  expect {
    click_button(I18n.t('helpers.submit.accounting.update'))
  }.to have_validation_error(I18n.t('accounting.two_digits_after_decimal_point')).on(
:share_ksk, 
:central_office, 
:limit_value, 
:fix_disagio)

regarding https://github.com/rspec/rspec-rails/issues/1033

but I get an RSpec error:

 undefined method `on' for #<RSpec::Matchers::BuiltIn::Has:0x00000005913368>
rspecrspec-railsrspec3


Solution 1:[1]

Solution 1: As you already know you can use rspec-collection_matchers gem.

Solution 2: You can monkey patch errors_on onto ::ActiveModel::Validations as done here

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Vishal Jain

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