| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>input type=file and change events</title> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <input type=file multiple> |
| <script> |
| async_test(t => { |
| const input = document.querySelector('input'); |
| input.addEventListener('change', t.step_func_done(e => { |
| assert_equals( |
| input.files.length, 2, |
| 'event should only be seen for drop, not for assignment'); |
| })); |
| |
| // Manually assign a FileList instance, with 3 files. |
| // This should not produce an event. |
| const dt = new DataTransfer(); |
| dt.items.add(new File([], 'file1.txt')); |
| dt.items.add(new File([], 'file2.txt')); |
| dt.items.add(new File([], 'file3.txt')); |
| input.files = dt.files; |
| |
| // Now simulate a drag, with 2 files. |
| // This should produce an event. |
| eventSender.beginDragWithFiles(['fileA.txt', 'fileB.txt']); |
| const rect = input.getBoundingClientRect(); |
| eventSender.mouseMoveTo(rect.left + rect.width / 2, rect.top + rect.height / 2); |
| eventSender.mouseUp(); |
| |
| }, 'expected change events'); |
| </script> |
