| <!DOCTYPE html> |
| <title>Window scroll promises are interrupted correctly</title> |
| <meta name="timeout" content="long"> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <link rel="author" title="Mustaq Ahmed" href="mailto:mustaq@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/cssom-view/#scrolling"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| <style> |
| .filler { height: 10000px } |
| </style> |
| <div class="filler"></div> |
| <script> |
| "use strict"; |
| |
| function resetScrollPosition() { |
| window.scrollTo(0, 0); |
| assert_equals(window.scrollY, 0, "Sanity check initial position"); |
| } |
| |
| promise_setup(async () => { |
| await waitForCompositorReady(); |
| }); |
| |
| for (const interrupt_behavior of ["auto", "smooth"]) { |
| promise_test(async () => { |
| resetScrollPosition(); |
| |
| const pos1 = 5000; |
| let promise1 = window.scrollTo({ top: pos1, behavior: "smooth" }); |
| |
| const pos2 = 6000; |
| let promise2 = |
| window.scrollTo({ top: pos2, behavior: interrupt_behavior }); |
| |
| assert_not_equals(window.scrollY, pos1, |
| "Position before first promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(window.scrollY, pos1, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(window.scrollY, pos2, |
| "Position after interrupting promise wait"); |
| }, `Window.scrollTo: interruption by ${interrupt_behavior} scroll call`); |
| |
| promise_test(async () => { |
| resetScrollPosition(); |
| |
| const pos1 = 5000; |
| let promise1 = window.scrollBy({ top: pos1, behavior: "smooth" }); |
| |
| const pos2 = 2000; |
| let promise2 = |
| window.scrollBy({ top: pos2, behavior: interrupt_behavior }); |
| |
| assert_not_equals(window.scrollY, pos1, |
| "Position before first promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(window.scrollY, pos1, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(window.scrollY, pos2, |
| "Position after interrupting promise wait"); |
| }, `Window.scrollBy: interruption by ${interrupt_behavior} scroll call`); |
| } |
| |
| |
| </script> |
