Jest - how to test if a component does not exist?

Question

How do I check if a component is not present, i.e. that a specific component has not been rendered?

Answer 1

.contains does not expect a selector, unlike find. You can look at the length attribute of the ShallowWrapper

expect(wrapper.find('...')).toHaveLength(0)

I found I needed to use this syntax with Enzyme and Jest to test if a Connected Component existed in the rendered output.