How to spec if a slot or other component is called inside a block

[CharlieWinkwaves]

When I have for example the following component

render ListComponent.new do |list| list.item(title: 'title1') list.item(title: 'title2') end

I want to check if ListComponent is called, without rendering the component. as speccing the result is part of the ListComponent spec.
But i do want to know if it called the item method twice. The same applies for when I render another component inside the block of a component. How to check if that component is called without having to render everything
render ListComponent.new do |list| list.item(title: 'title1') { render HeaderComponent.new(title: 'header') } end

Does anyone know a way to do this?

[joeldrapper]

I guess you would have to override call with a stubbed method that yields a mock that listens for the other method to be called twice.

Personally, I would try to avoid writing specs that were too coupled to the implementation.

Instead, I would render the component and make assertions about the HTML it produced.