1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/screen-details/getScreenDetails.tentative.https.window.js b/testing/web-platform/tests/screen-details/getScreenDetails.tentative.https.window.js
new file mode 100644
index 0000000000..06f0344f3a
--- /dev/null
+++ b/testing/web-platform/tests/screen-details/getScreenDetails.tentative.https.window.js
@@ -0,0 +1,63 @@
+// META: global=window
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+'use strict';
+
+promise_test(async t => {
+  assert_equals(typeof self.getScreenDetails, 'function');
+}, 'getScreenDetails() is present');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'window-management'}, 'granted');
+  const screenDetails = await self.getScreenDetails();
+  assert_true(ScreenDetails.prototype.isPrototypeOf(screenDetails));
+  assert_true(ScreenDetailed.prototype.isPrototypeOf(screenDetails.currentScreen));
+  assert_true(Array.prototype.isPrototypeOf(screenDetails.screens));
+  assert_greater_than(screenDetails.screens.length, 0);
+  assert_true(ScreenDetailed.prototype.isPrototypeOf(screenDetails.screens[0]));
+  assert_true(screenDetails.screens.includes(screenDetails.currentScreen));
+}, 'getScreenDetails() returns the expected interface with permission granted');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'window-management'}, 'granted');
+  assert_greater_than((await self.getScreenDetails()).screens.length, 0);
+  await test_driver.set_permission({name: 'window-management'}, 'denied');
+  await promise_rejects_dom(t, 'NotAllowedError', self.getScreenDetails());
+}, 'getScreenDetails() rejects the promise with permission denied');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'window-management'}, 'granted');
+  let iframe = document.body.appendChild(document.createElement('iframe'));
+  assert_greater_than((await iframe.contentWindow.getScreenDetails()).screens.length, 0);
+
+  let iframeGetScreens;
+  let constructor;
+  await new Promise(resolve => {
+    iframe.contentWindow.onunload = () => {
+      // Grab these before the contentWindow is removed.
+      iframeGetScreens = iframe.contentWindow.getScreenDetails;
+      constructor = iframe.contentWindow.DOMException;
+      resolve();
+    };
+    document.body.removeChild(iframe);
+  });
+  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());
+}, 'getScreenDetails() resolves for attached iframe; rejects for detached iframe');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'window-management'}, 'granted');
+  let iframe = document.body.appendChild(document.createElement('iframe'));
+  const screenDetails = await iframe.contentWindow.getScreenDetails();
+  assert_greater_than(screenDetails.screens.length, 0);
+  assert_equals(screenDetails.currentScreen, screenDetails.screens[0]);
+  iframe.remove();
+  await t.step_wait(() => !iframe.contentWindow, 'execution context invalid');
+  assert_equals(iframe.contentWindow, null);
+  assert_equals(screenDetails.screens.length, 0);
+  assert_equals(screenDetails.currentScreen, null);
+}, 'Cached ScreenDetails interface from detached iframe does not crash, behaves okay');