Then the newsletter form should show an error for the field "Email Address"

Assert a field of the newsletter block does (or does not) show an error.

Examples

Then the newsletter form should show an error for the field "Email Address"
And the newsletter form should show an error for the field "Email Address"
But the newsletter form should not show an error for the field "Email Address"
Then the newsletter form should show an error for the field "Email"
And the newsletter form should not show an error for the field "Name"

Pattern

Then(/^(?:the )?newsletter form should( not)* show an error for the field "([^"]*)"$/, …)

Part of @webship-js/squarespace-steps (github.com/webship/squarespace-steps), a step pack for Webship-js 2.0.x.