Assert what the pager of the control panel reads: the range of records on screen and their total, as "1-80 / 132" on a list view or "1 / 15" on a form view (.o_pager_value, .o_pager_limit).
Examples
Then the pager should read "1-15 / 15"
And the pager should read "1-80 / 132"
Then the pager should read "1 / 2"
And the pager should not read "1-80 / 80"
Then the pager should not read "1 / 1"
Pattern
Then(/^the pager should( not)* read "([^"]*)"$/, …)
Part of @webship-js/odoo-steps (github.com/webship/odoo-steps), a step pack for Webship-js 2.0.x.