example.spec.js

describe("<locale-detection>", () => {
  withHTML(`
    <locale-detection url="http://example.net/locale">
    </locale-detection>
  `).onFetch( "/locale", [
    { then: { status: 200 }},
  ]
  ).test("Receives the locale and timeZone from the browser",
         ({document,assert,fetchRequests}) => {
    assert.equal(1,fetchRequests.length)
    return readBodyIntoJSON(fetchRequests[0]).then( (json) => {
      assert.equal(json["locale"],"en-US")
      assert.equal(json["timeZone"],"UTC")
    })
  })
})