undefined method `validate_presence_of' for RSpec::ExampleGroups::User::Validations

Add rspec-rails and shoulda-matchers in your Gemfile:

group :development, :test do
  gem 'rspec-rails', '~> 3.4', '>= 3.4.2'
  gem 'shoulda-matchers', '~> 3.1', '>= 3.1.1'
end

Set your spec/rails_helper.rb to use rspec-rails and shoulda-matchers:

require 'rspec/rails'
require 'shoulda/matchers'

And add in your spec/spec_helper.rb:

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :rspec
    with.library :rails
  end
end

I think you need to add the following to your spec_helper.rb

require 'shoulda/matchers'

Your specs are missing shoulda matcher's methods.

Here is the source. You can check. People complains similar things. https://github.com/thoughtbot/shoulda-matchers/issues/384

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