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

WAIT_ELEMENT(doc, "form")

LET input = ELEMENT(doc, "#select_input")
LET output = ELEMENT(doc, "#select_output")
LET result = SELECT(input, ["4"])

RETURN EXPECT(output.innerText, "4") + EXPECT(JSON_STRINGIFY(result), '["4"]')