Assert the apps menu lists, or does not list, an app. An app is listed when it is installed and the user belongs to one of its groups, so this is the first check of an access-rights scenario.
Examples
Then I should see the "CRM" app
And I should not see the "Invoicing" app
Then we should see the "Sales" app
And I should not see the "Settings" application
Then we should not see the "Website" application
Pattern
Then(/^(I |we )*should( not)* see the "([^"]*)" app(?:lication)?$/, …)
Part of @webship-js/odoo-steps (github.com/webship/odoo-steps), a step pack for Webship-js 2.0.x.