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Project: RSpec Rails 5.0

Publisher: RSpec

System spec

System specs are RSpec's wrapper around Rails' own
system tests.

System tests allow you to test user interactions with your application,
running tests in either a real or a headless browser. System tests use
Capybara under the hood.

By default, system tests are run with the Selenium driver, using the
Chrome browser, and a screen size of 1400x1400. The next section explains
how to change the default settings.

System specs are marked by setting type to :system, e.g. :type => :system.

The Capybara gem is automatically required, and Rails includes it in
generated application Gemfiles. Configure a webserver (e.g.
Capybara.server = :webrick) before attempting to use system specs.

RSpec does not use your ApplicationSystemTestCase helper. Instead it
uses the default driven_by(:selenium) from Rails. If you want to override
this behaviour you can call driven_by manually in a test.

System specs run in a transaction. So unlike feature specs with
javascript, you do not need DatabaseCleaner.

Scenarios
  1. System specs driven by rack_test
  2. the ActiveJob queue_adapter can be changed
  3. System specs driven by selenium_chrome_headless
  • @system_test
System specs driven by rack_test
Given
a file named "spec/system/widget_system_spec.rb" with: 
require "rails_helper"

RSpec.describe "Widget management", :type => :system do
  before do
    driven_by(:rack_test)
  end

  it "enables me to create widgets" do
    visit "/widgets/new"

    fill_in "Name", :with => "My Widget"
    click_button "Create Widget"

    expect(page).to have_text("Widget was successfully created.")
  end
end
When
I run rspec spec/system/widget_system_spec.rb
Then
the exit status should be 0
And
the output should contain "1 example, 0 failures"
  • @system_test
the ActiveJob queue_adapter can be changed
Given
a file named "spec/system/some_job_system_spec.rb" with: 
require "rails_helper"

class SomeJob < ActiveJob::Base
  cattr_accessor :job_ran

  def perform
    @@job_ran = true
  end
end

RSpec.describe "spec/system/some_job_system_spec.rb", :type => :system do
  describe "#perform_later" do
    before do
      ActiveJob::Base.queue_adapter = :inline
    end

    it "perform later SomeJob" do
      expect(ActiveJob::Base.queue_adapter).to be_an_instance_of(ActiveJob::QueueAdapters::InlineAdapter)

      SomeJob.perform_later

      expect(SomeJob.job_ran).to eq(true)
    end
  end
end
When
I run rspec spec/system/some_job_system_spec.rb
Then
the example should pass
  • @system_test
System specs driven by selenium_chrome_headless
Given
a file named "spec/system/widget_system_spec.rb" with: 
require "rails_helper"

RSpec.describe "Widget management", :type => :system do
  before do
    driven_by(:selenium_chrome_headless)
  end

  it "enables me to create widgets" do
    visit "/widgets/new"

    fill_in "Name", :with => "My Widget"
    click_button "Create Widget"

    expect(page).to have_text("Widget was successfully created.")
  end
end
When
I run rspec spec/system/widget_system_spec.rb
Then
the output should contain "1 example, 0 failures"
And
the output should not contain "starting Puma"
And
the exit status should be 0

Last published 7 months ago by Jon Rowe.