Assert the shop grid lists, or does not list, a product by its name (#products_grid .o_wsale_products_item_title).
Examples
Then I should see the "Customizable Desk" product in the shop
And I should see the "Office Chair" product in the shop
Then we should see the "Large Cabinet" product in the shop
And I should not see the "Office Lamp" product in the shop
Then we should not see the "Warranty" product in the shop
Pattern
Then(/^(I |we )*should( not)* see the "([^"]*)" product in the shop$/, …)
Part of @webship-js/odoo-steps (github.com/webship/odoo-steps), a step pack for Webship-js 2.0.x.