Fill a field of an admin form, found by its label: a text field, a text area, or a select (the value is the option text; several options of a multi-select are separated by commas). The value is read back, so a field the form did not take fails here and not at Save.
Examples
When I set the "Product Name" form field to "Test Bag"
When I set the "SKU" form field to "TEST-SKU-1"
And I set the "Visibility" form field to "Catalog"
When we set the "Customer Groups" form field to "NOT LOGGED IN, General"
When I set the "Price" form field to "12.50"
Pattern
When(/^(I |we )*set the "([^"]*)" form field to "([^"]*)"$/, …)
Part of @webship-js/magento-steps (github.com/webship/magento-steps), a step pack for Webship-js 2.0.x.