Is there a programmatic way to change user agent in Cypress.io?

Question

I have some ad calls that are only made on mobile devices. In Chrome, I can use Device Mode and simulate a mobile device, and the resulting ad call from the server is corre

Answer 1

Update: According to https://github.com/cypress-io/cypress/issues/3873 it is possible since Cypress 3.3.0 use user-agent property in a cy.request() and cy.visit().

If you need, for example, set userAgent as Googlebot:

cy.visit(url, {
    headers: {
        'user-agent': 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
    }
});

---

Original answer before Cypress 3.3.0

before(() => {
    cy.visit(url, {
        onBeforeLoad: win => {
            Object.defineProperty(win.navigator, 'userAgent', {
                value: 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)',
            });
        },
    });
});