screen_enumeration/getScreens.tentative.https.window.js

// META: global=window
// META: script=/resources/testdriver.js
// META: script=/resources/testdriver-vendor.js
'use strict';

promise_test(async t => {
  assert_equals(typeof self.getScreens, 'function');
}, 'getScreens() is present');

promise_test(async t => {
  await test_driver.set_permission({name: 'window-placement'}, 'granted');
  const screens = await self.getScreens();
  assert_greater_than(screens.length, 0);

  assert_equals(typeof screens[0].availWidth, 'number');
  assert_equals(typeof screens[0].availHeight, 'number');
  assert_equals(typeof screens[0].width, 'number');
  assert_equals(typeof screens[0].height, 'number');
  assert_equals(typeof screens[0].colorDepth, 'number');
  assert_equals(typeof screens[0].pixelDepth, 'number');

  assert_equals(typeof screens[0].availLeft, 'number');
  assert_equals(typeof screens[0].availTop, 'number');
  assert_equals(typeof screens[0].left, 'number');
  assert_equals(typeof screens[0].top, 'number');
  assert_equals(typeof screens[0].orientation, 'object');

  assert_equals(typeof screens[0].primary, 'boolean');
  assert_equals(typeof screens[0].internal, 'boolean');
  assert_equals(typeof screens[0].scaleFactor, 'number');
  assert_equals(typeof screens[0].id, 'string');
  assert_equals(typeof screens[0].touchSupport, 'boolean');
}, 'getScreens() returns at least 1 Screen with permission granted');

promise_test(async t => {
  await test_driver.set_permission({name: 'window-placement'}, 'granted');
  assert_greater_than((await self.getScreens()).length, 0);
  await test_driver.set_permission({name: 'window-placement'}, 'denied');
  await promise_rejects_dom(t, 'NotAllowedError', self.getScreens());
}, 'getScreens() rejects the promise with permission denied');

async_test(async t => {
  await test_driver.set_permission({name: 'window-placement'}, 'granted');
  let iframe = document.body.appendChild(document.createElement('iframe'));
  assert_greater_than((await iframe.contentWindow.getScreens()).length, 0);

  iframe.contentWindow.onunload = t.step_func(async () => {
    // TODO(crbug.com/1106132): This should reject or resolve; not hang.
    // assert_greater_than((await iframe.contentWindow.getScreens()).length, 0);

    let iframeGetScreens = iframe.contentWindow.getScreens;
    let constructor = iframe.contentWindow.DOMException;
    assert_not_equals(iframeGetScreens, undefined);
    assert_not_equals(constructor, undefined);

    await t.step_wait(() => !iframe.contentWindow, "execution context invalid");
    assert_equals(iframe.contentWindow, null);
    await promise_rejects_dom(t, 'InvalidStateError', constructor, iframeGetScreens());
    t.done();
  });

  document.body.removeChild(iframe);
}, "getScreens() resolves for attached iframe; rejects for detached iframe");