Support matchers from @testing-library/jest-dom

[Andarist]

It would be quite a nice addition if this would support custom matchers from @testing-library/jest-dom - many of them are somewhat builtin to Cypress so might be better not to touch them but for example, toHaveDescription is something that can't be trivially achieved in raw Cypress.

[NicholasBoll]

I've thought about adding a few custom matchers to Cypress. I've done a few custom ones on projects by overriding should.

Cypress isn't really handling matchers directly, but using Chai and Chai matchers. It is possible to delegate to other systems if you want to use jest-dom directly.

Perhaps this post could help a bit: https://medium.com/@NicholasBoll/using-jest-matchers-in-cypress-5e8e7281f5dd

[Andarist]

Right - it would be nice though if this particular library would do this automatically for me.