Hooks
๐จโ๐ผ So we've got some cleanup at the end of our test and that's going to be
problematic if that test fails. Vitest has the same concept of
before
/after
Each
/All
as Playwright:import { beforeEach, afterEach, beforeAll, afterAll } from 'vitest'
beforeAll(async () => {
// do something before all tests
})
afterAll(async () => {
// do something after all tests
})
beforeEach(async () => {
// do something before each test
})
afterEach(async () => {
// do something after each test
})
Of course those functions don't have to be
async
if you aren't doing
anything asynchronous in them๐ฆ As mentioned, I typically prefer to not do setup in testing hooks, but this
is an exception. There are in fact, no tests where I want the real
console.error
to be called. So by using a beforeEach
hook, we can mock the
console.error
for every test and restore it after it's finished. Additionally,
it would be a good idea to make certain there were no unexpected calls to
console.error
(we don't want to swallow errors and miss actual problems!).Sadly, this is going to require a bit more work than what we were doing before,
but it'll be better this way, I promise.
Oh, also, that
mockRestore()
idea is such a good idea generally that there's
even a configuration option to do it by default. So we can remove that call and
add that in . This will actually ensure
our cleanup of the mock functions always run after each test which is exactly
what we want.vitest replaced
SpyInstance
with MockInstance
so the videos will use
SpyInstance
, but you'll be using MockInstance
.