declare namespace Cypress { interface Chainable { checkPopoverContentOnMouseEvent: typeof checkPopoverContentOnMouseEvent } } function checkPopoverContentOnMouseEvent(dataTestId: string, klass: string, mouseEvent: string, index: number) : Chainable { index = index || 0; let element = cy.getElementByDataTestsId(dataTestId).eq(index); element.trigger(mouseEvent).click().get(klass); return element; } Cypress.Commands.add('checkPopoverContentOnMouseEvent', checkPopoverContentOnMouseEvent);