test('Showing and hiding with buttons and window history', async t => {
  const goBack = ClientFunction(() => window.history.back());
  const goForward = ClientFunction(() => window.history.forward());

  // Ensures that the page loads before we start messing with history. Otherwise
  // Edge will click "back" right off of the page.
  await map.root();

  await t.click(Selector('a.btn'));
  await t.expect(map.leafletMap.exists).ok();

  await goBack();
  await t.expect(map.leafletMap.exists).notOk();

  await goForward();
  await t.expect(map.leafletMap.exists).ok();

  await t.click(map.modalCloseButton);
  await t.expect(map.leafletMap.exists).notOk();

  // Regression to ensure that the close button clears out the hash, otherwise
  // pressing the button won't cause a hashchange event.
  await t.click(Selector('a.btn'));
  await t.expect(map.leafletMap.exists).ok();
});

test('Error in code', async() => {
    var fn = ClientFunction(() => {
        throw new Error('Hey ya!');
    });

    await fn();
});