How to modify the response based on POST body params

[pstephenwille]

I have a shared setup file that defines the intercepted routes. The default response for those routes is provided by JSON-server. In the individual test files, I override the route and response data that's specific to the test. This allows me to have a centrally defined route for most cases and only override certain ones needed to test a code path. The problem I'm having now is, I can't change the response data once the route is intercepted in the shared file.

I have a shared default route defined like so:

           cy.intercept('POST', new RegExp(CONST.URI.FOO))
            .as('allFoo');

And I'd like to override it in the test like so

            cy.intercept('POST', new RegExp(CONST.URI.FOO + '/query'), (req) => {
                const foo = req.body.filterAttributes.includes('x');
                req.reply((resp) => {
                    if (!foo) {
                        resp.body.fields[0].updatedAt = getMonthDayYearAndTime(new Date());
                    } else {
                        resp.body = {fields: fixtureData};
                    }
                });
            });

Is this even possible?
Perhaps I could only define the route in the tests that use it but that is now how our tests are structured.
Or perhaps a cy.intercept(url).clear to allow us to remock the route

[herecydev]

Unfortunately not at the moment, see #9302

It however is highly desirable, and PRs are out to make this so: #14543