A custom Cucumber web step that looks for existing links

web_steps_extended.rb

# Cucumber Step
Then /^I should see the link "([^"]*)"(?: within "([^"]*)")?$/ do |text, selector|
  matching_link = nil
  with_scope(selector) do
    all('a').each do |link|
      matching_link = link if link.has_content?(text)
    end
  end
  assert matching_link != nil, "No matching link was found"
end

# Usage
Scenario:
  Given I am on the home page
  Then I should see the link "Login"

# Alternate usage:
  Given I am on the home page
  Then I should see the link "Login" within "#navigation"