Assert which source of the index is the current one.
Examples
Then the "Blog" source of the index should be selected
Then the "All entries" source of the index should be selected
Then the "Topics" source of the index should be selected
And the "Images" source of the index should be selected
Then the "Images" source of the index should be selected
Pattern
Then(/^the "([^"]*)" source of the index should be selected$/, …)
Part of @webship-js/craft-cms-steps (github.com/webship/craft-cms-steps), a step pack for Webship-js 2.0.x.