| Andrew Top | 61a8495 | 2019-04-30 15:07:33 -0700 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <meta charset=utf-8> |
| 3 | <title>Process Events for FileReader</title> |
| 4 | <link rel=help href="http://dev.w3.org/2006/webapi/FileAPI/#event-handler-attributes-section"> |
| 5 | <link rel=author title="Jinks Zhao" href="mailto:jinks@maxthon.com"> |
| 6 | <script src="/resources/testharness.js"></script> |
| 7 | <script src="/resources/testharnessreport.js"></script> |
| 8 | Please choose one file through this input below.<br> |
| 9 | <input type="file" id="filer"> |
| 10 | <div id="log"></div> |
| 11 | <script> |
| 12 | var input, reader, progressEventCounter, progressEventTimeList, |
| 13 | lastProgressEventTime; |
| 14 | setup(function() { |
| 15 | input = document.getElementById('filer'); |
| 16 | reader = new FileReader(); |
| 17 | progressEventCounter = 0; |
| 18 | progressEventTimeList = []; |
| 19 | lastProgressEventTime; |
| 20 | }, { explicit_timeout: true }); |
| 21 | |
| 22 | var t = async_test("FileReader progress events.") |
| 23 | |
| 24 | reader.onprogress = t.step_func(function () { |
| 25 | var newTime = new Date; |
| 26 | var timeout = newTime - lastProgressEventTime; |
| 27 | |
| 28 | progressEventTimeList.push(timeout); |
| 29 | lastProgressEventTime = newTime; |
| 30 | progressEventCounter++; |
| 31 | |
| 32 | assert_less_than_equal(timeout, 50, "The progress event should be fired every 50ms."); |
| 33 | }); |
| 34 | |
| 35 | reader.onload = t.step_func_done(function () { |
| 36 | assert_greater_than_equal(progressEventCounter, 1, |
| 37 | "When read completely, the progress event must be fired at least once.") |
| 38 | }); |
| 39 | |
| 40 | input.onchange = t.step_func(function () { |
| 41 | var files = input.files; |
| 42 | |
| 43 | assert_greater_than(files.length, 0); |
| 44 | var file = files[0]; |
| 45 | |
| 46 | lastProgressEventTime = new Date; |
| 47 | reader.readAsArrayBuffer(file); |
| 48 | }); |
| 49 | </script> |
