Open the grid row that contains a text: its "Edit" or "View" link, the "Edit" entry of its "Select" menu, or the row itself in an older grid.
Examples
When I open the "Joust Duffle Bag" grid row
When I open the "000000003" grid row
And I open the "customer@example.com" grid row
When we open the "Home Page" grid row
When I open the "Test Rule" grid row
Pattern
When(/^(I |we )*open the "([^"]*)" grid row$/, …)
Part of @webship-js/magento-steps (github.com/webship/magento-steps), a step pack for Webship-js 2.0.x.