Assert the page number the grid is on.
Examples
Then the grid should be on page 2
Then the grid should be on page 1
And the grid should be on page 5
Then the grid should be on page 4
Then the grid should be on page 3
Pattern
Then(/^the grid should be on page (\d+)$/, …)
Part of @webship-js/magento-steps (github.com/webship/magento-steps), a step pack for Webship-js 2.0.x.