Cucumber wont accept Capybara Minitest Spec assertions

Question

I'm using Cucumber with Capybara in Rails 4.2, but I'm not using RSpec. I've been sticking with Minitest. I've been using minitest:spec in most of my tests.

Whenever I try to use make an assertion with minitest or minitest:spec syntax in a Cucumber step I get an error saying the assertion method is undefined. For example this step:

Then (/^the state selector has no states$/) do
  page.wont_have_selector(".my-css-class", :visible)
end

gives this error

undefined method `refute_selector' for nil:NilClass (NoMethodError)

(page.wont_have_selector is the minitest:spec syntax for the minitest method refute_selector)

I have a file features/support/minitest.rb with this content

require 'minitest'
require "minitest/rails/capybara"
require "minitest/spec"

module MiniTestAssertions

  def self.extended(base)
    base.extend(MiniTest::Assertions)
    base.assertions = 0
  end

  attr_accessor :assertions

end

World(MiniTestAssertions)

Here is my test section of Gemfile

group :development, :test do
  gem 'byebug'
  gem 'web-console', '~> 2.0'
  gem 'spring'
  gem 'mocha', require: false
  gem 'cucumber-rails', require: false
  gem 'database_cleaner'
end

group :test do
  gem 'minitest-reporters'
  gem 'minitest-rails-capybara'
  gem 'minitest-spec-rails'
  gem 'capybara_minitest_spec'
  gem 'launchy'
  gem 'selenium-webdriver'
  gem 'poltergeist'
end

the Gemfile.lock includes the following

capybara (2.4.4)
capybara_minitest_spec (1.0.5)
cucumber (1.3.20)
cucumber-rails (1.4.2)
minitest (5.7.0)
minitest-capybara (0.7.2)
minitest-metadata (0.5.3)
minitest-rails (2.2.0)
minitest-rails-capybara (2.1.1)
minitest-spec-rails (5.2.2)
rails (4.2.1)

Edit

It is only Capybara specific Minitest assertions that are not recognised in the Cucumber step file. If I change the step content to this:

assert true
refute false

then it passes. Also the Capybara Minitest assertions work fine in the test/features directory for doing integration testing outside Cucumber.

I think I have to add something to features/suport/minitest.rb so that the Capybara Minitest assertions get added to the Cucumber World, but I don't know what it is.

Edit

It's actually only the spec version of Capybara's minitest assertions that are giving the problem. If I change the content of the step to this:

refute_selector(".my-css-class", :visible)

then it works.

Edit

I think it's bug #10 in capybara_minitest_spec gem that I got reopened.

Thomas Walpole Thomas Walpole · Accepted Answer · 2015-09-15T22:46:55

You can try

require 'capybara/cucumber'

in your minitest.rb. If that causes problems because it requires 'capybara/rspec/matchers' (although that file doesn't actually need rspec) then you could just do

World(Capybara::DSL)

and then implement whatever Before and After hooks you need for your testing environment (see cucumber.rb )

Cucumber wont accept Capybara Minitest Spec assertions

2 Answers