| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>XMLHttpRequest: the LOADING state change should only happen once</title> | |
| <script src="/resources/testharness.js"></script> | |
| <script src="/resources/testharnessreport.js"></script> | |
| <link rel="help" href="http://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html#the-send()-method" data-tested-assertations="following::ol[1]/li[10]/dt[1]"> | |
| <link rel="help" href="http://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html#infrastructure-for-the-send()-method" data-tested-assertations="following::dt[7] following::a[contains(@href,'#switch-loading')]/.."> | |
| <link rel="help" href="http://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html#switch-loading" data-tested-assertations="following::ol[1]/li[1] following::ol[1]/li[2]"> | |
| </head> | |
| <div id="log"></div> | |
| <script> | |
| var test = async_test(); | |
| test.step(function() { | |
| var client = new XMLHttpRequest(); | |
| var countedLoading = 0; | |
| client.onreadystatechange = test.step_func(function() { | |
| if (client.readyState === 3) { | |
| countedLoading += 1; | |
| } | |
| if (client.readyState === 4) { | |
| assert_equals(countedLoading, 1, "LOADING state change may only be emitted once"); | |
| test.done(); | |
| } | |
| }); | |
| client.open("GET", "resources/trickle.py?count=1000"); | |
| client.send(null); | |
| }); | |
| </script> |