Chainable Matchers

[zangab]

👋 Hi guys,
we are currently migrating from jest to vitest.
In jest we used a package called jest-chain which allows you to chain matchers that are partially applied (with their own context), so f.e. an isNot is not interfering with a following matcher.

// sample spec, we do have custom matchers defined via expect.extend() though, but to get the picture
expect(80).not.toBeTypeOf('string').toBeGreaterThan(30)
// this would fail, bc the not is also negating the toBeGreaterThan matcher

We put our matchers in a setup file and they are loaded but the ability to chain them is currently missing. As soon as an isNot is set, it's reversing the logic and outcome of the other matchers. How can we achieve this?

This is the source of the chain.js of jest-chain.

Thx.

[sheremet-va]

expect is provided by chai.js, so all the chaining behaviour is identical to it

[Dobby89]

Does anyone know of a compatible package which does this?