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Testing Page Refresh Implementation in Capybara

This test suite validates the refresh functionality in Capybara, focusing on page reloading behavior and form state management. The tests ensure proper page reloading, error handling, and form resubmission capabilities.

Test Coverage Overview

The test suite provides comprehensive coverage of Capybara’s refresh functionality across multiple scenarios.

Key areas tested include:

Page state reset after refresh
Form field value restoration
Server error propagation
Form resubmission behavior

Implementation Analysis

The testing approach employs Capybara’s session management capabilities to verify page refresh behavior. The implementation uses RSpec expectations combined with Capybara’s built-in matchers and form interaction methods.

Notable patterns include:

Session state verification
Form interaction testing
Error handling validation
POST request verification

Technical Details

Testing tools and configuration:

RSpec testing framework
Capybara session management
TestApp server integration
Custom error handling middleware
Form submission tracking

Best Practices Demonstrated

The test suite exemplifies several testing best practices in web application testing.

Notable practices include:

Isolated test cases
Clear test descriptions
Proper setup and teardown
Explicit state verification
Error case handling

teamcapybara/capybara

lib/capybara/spec/session/refresh_spec.rb

            
# frozen_string_literal: true

# NOTE: This file uses `sleep` to sync up parts of the tests. This is only implemented like this
# because of the methods being tested. In tests using Capybara this type of behavior should be implemented
# using Capybara provided assertions with builtin waiting behavior.

Capybara::SpecHelper.spec '#refresh' do
  it 'reload the page' do
    @session.visit('/form')
    expect(@session).to have_select('form_locale', selected: 'English')
    @session.select('Swedish', from: 'form_locale')
    expect(@session).to have_select('form_locale', selected: 'Swedish')
    @session.refresh
    expect(@session).to have_select('form_locale', selected: 'English')
  end

  it 'raises any errors caught inside the server', requires: [:server] do
    quietly { @session.visit('/error') }
    expect do
      @session.refresh
    end.to raise_error(TestApp::TestAppError)
  end

  it 'it reposts' do
    @session.visit('/form')
    @session.select('Sweden', from: 'form_region')
    @session.click_button('awesome')
    sleep 2
    expect do
      @session.refresh
      sleep 2
    end.to change { extract_results(@session)['post_count'] }.by(1)
  end
end