Assert the kind of shop page that is shown, as the shop names it (the id of the body): index, category, product, search, cart, checkout, order-confirmation, authentication, registration, my-account, history, order-detail, addresses, address, contact, pagenotfound…
Examples
Then I should be on a "category" shop page
Then I should be on a "product" shop page
Then we should be on a "order-confirmation" shop page
And I should be on a "pagenotfound" shop page
Then I should be on a "authentication" shop page
Pattern
Then(/^(I |we )*should be on an? "([^"]*)" shop page$/, …)
Part of @webship-js/prestashop-steps (github.com/webship/prestashop-steps), a step pack for Webship-js 2.0.x.