Open the editor for a new post or a new page and wait for its title field.
Examples
When I start a new post
When I start a new page
When we start a new post
Given I start a new post
And we start a new page
Pattern
When(/^(?:I |we )?start a new (post|page)$/, …)
Part of @webship-js/ghost-steps (github.com/webship/ghost-steps), a step pack for Webship-js 2.0.x.