LET url = @lab.cdn.dynamic + "?redirect=/iframe&src=/forms"
LET page = DOCUMENT(url, { driver: 'cdp' })
LET doc = page.frames[1]

WAIT_ELEMENT(doc, "form")

LET input = ELEMENT(doc, "#text_input")
LET output = ELEMENT(doc, "#text_output")

INPUT(input, "foo")

RETURN T::EQ(output.innerText, "foo")