Navigate to the "Contact us" page at /contactus and check that the site serves it: the Website layout is there and the page is not the 404 page.
Examples
Given I am on the contact us page
Given we are on the contact page
Given we are on the contact us page
And on the contact-us page
Given I am on the contact page
Pattern
Given(/^(I am |we are )*on the (?:contact[ -]?us|contact) page$/, …)
Part of @webship-js/odoo-steps (github.com/webship/odoo-steps), a step pack for Webship-js 2.0.x.