Basic Test Structure

There are two main layout structures in Enzyme:

describe

Describe is used to group a set of related tests together. For example, you might group a set of tests on the basis that they are all failure cases. It is okay to nest describe function calls, since it is a way of laying out your tests. The function takes a descriptor string as it's first argument, and a lambda function as it's second argument, like so:

describe('descriptive string', () => {
    ...
    ...
    ...
});

it

It is used to provide the descriptor and code for a particular test case. For example, one of your test cases might be that a failure happens because of an unexpected error, and another might be caused by bad input data. Both of these could fall under the same describe function call, but different it calls. it has the same structure as describe:

it('descriptive string'. () =. {
    ...
    ...
    ...
});