how to disable clear all cookies before each testcase

[mingyixu]

Current behavior:

Cypress automatically clears all cookies before each test to prevent state from building up.

how to disable? use Cypress.Cookies.preserveOnce() or Cookies.defaults() is not work.

this feature effect my login by sso.

cy.visit("http://xxx.com?sso_ticket=xxxx")

the same testcase run on cypress 3.1.5 and 3.6.1，can login in。 but on cypress 3.7.0 ~ 4.1.0 not work，can't login in，Its were badly affected。

I check 3.7.0 release notes, this bugfixs:

Fixed a regression in 3.5.0 where a cy.visit that changes superdomain would incorrectly clear cookies of other domains. Fixes #5756.

Fixed a regression in 3.5.0 where cookies set in a redirect on a cy.visit or in a cy.request with a custom Domain that is not a subdomain of the current domain would fail to set. Fixes #5656.

pls help me to check it, I can provided more infos。

Desired behavior:

Test code to reproduce

Versions

cypress : 4.1.0
chrome: 80
system：linux，mac

[eGoudi]

I have the same problem

[mingyixu]

the same testcase run on cypress 3.1.5 and 3.6.0，can login in。 but on cypress 3.7.0 ~ 4.1.0 not work，can't login in，Its were badly affected。

[jennifer-shehane]

Unfortunately we have to close this issue as there is not enough information to reproduce the problem. This does not mean that your issue is not happening - it just means that we do not have a path to move forward.

Please comment in this issue with a reproducible example and we will consider reopening the issue.

[mingyixu]

@jennifer-shehane ：After the version upgrade to 4.1.0, my integration test execution is blocked. I hope to help you see this problem. If you need to provide any logs（debug logs which part), I'd like to provide them.

[jennifer-shehane]

We'll need a reproducible example or sufficient enough explanation of the preserveOnce not working (showing DevTools of where cookie should not be cleared but is being cleared logging the values of the cookies, etc - comparing pre 3.7.0 to other version directly). We're happy to reopen if there's a way we can see and reproduce the problem ourselves.