Assert the page number the product list is on.
Examples
Then the product list should be on page 2
Then the product list should be on page 1
And the product list should be on page 3
Then the product list should be on page 4
Then the product list should be on page 5
Pattern
Then(/^the product list 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.