cy.server() should work even before cy.visit()

[brian-mann]

Currently cy.server can only be started after you cy.visit a remote page.

cy
  .visit("http://localhost:7000/dashboard")
  .server()
  .route(...)

This is problematic because many pages make XHR requests onLoad. Because cy.visit resolves when the page's load event fires, by this time it is often too late. XHR requests may have gone out.

Therefore cy.server should be able to be invoked prior to a page loading (even though one does not exist).

Any routes attached to the server should also be carried over.

[brian-mann]

This new functionality is implemented in 0.4.3. Changelog