Assert the page shows (or does not show) a block with a title.
Examples
Then I should see the block titled "Search"
Then I should not see the block titled "User login"
And I should see the block titled "Create content"
Then we should see the block titled "Content overview"
And should not see the block titled "Syndicate"
Pattern
Then(/^(I |we )*should( not)* see the block titled "([^"]*)"$/, …)
Part of @webship-js/backdrop-cms-steps (github.com/webship/backdrop-cms-steps), a step pack for Webship-js 2.0.x.