How to return a list of objects from Cypress Custom Commands in type script

[sgv584]

I am using Cypress for my end to end Integration tests. I have a use case which involves returning a list of objects from Cypress Custom Commands and I have a difficulty in doing so. Here is my code pointer:

index.ts

declare global {
    namespace Cypress {
        interface Chainable<Subject> {
            getTestDataFromElmoDynamoDB({locale, testType}): Cypress.Chainable<JQuery<expectedData[]>> // ??? not sure what return type should be given here.
        }
    }
}


Cypress.Commands.add('getTestDataFromDynamoDB', ({locale, testType}) => {
    // expectedData is an interface declared. My use case is to return the list of this type.
    let presetList: expectedData[] 
    cy.task('getTestDataFromDynamoDB', {
        locale: locale,
        testType: testType
    }).then((presetData: any) => {
        presetList = presetData;
        // the whole idea here is to return presetList from cypress task
        return cy.wrap(presetList) //??? not sure what should be written here
    })
})

sampleSpec.ts

describe('The Sample Test', () => {

    it.only('DemoTest', () => {
        cy.getTestDataFromElmoDynamoDB({
            locale: env_parameters.env.locale,
            testType: "ChangePlan"
        }).then((presetlist) => {
           // not sure on how to access the list here. Tried wrap and alias but no luck.
            presetList.forEach((preset: expectedData) => {
              //blah blah blah
            })
        })
    })
})

Did anyone work on similar use case before?

Thanks,
Saahith