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66 lines
2.3 KiB
HTML
66 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<!-- This behaviour is not explicitly spelled out in the spec.
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It does say "queue tasks" under the "if the synchronous flag is unset" header in point 10 of the "send" algorithm.. -->
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<link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following-sibling::ol/li[10]/dl/dd/dl/dd[2]/p[3]" />
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<title>XMLHttpRequest: sync requests should block events on pending async requests</title>
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</head>
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<body>
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<div id="log"></div>
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<script type="text/javascript">
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var test = async_test();
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var expect = ['sync 4', 'async 2', 'async 3', 'async 4']
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var actual = []
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test.step(function()
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{
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var xhr_async = new XMLHttpRequest()
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xhr_async.open('GET', 'resources/delay.py?ms=1000', true) // first launch an async request, completes in 1 second
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xhr_async.onreadystatechange = function()
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{
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test.step(function()
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{
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actual.push('async ' + xhr_async.readyState)
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if(xhr_async.readyState === 4 && actual.indexOf('sync 4')>-1){
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VerifyResult()
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}
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});
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};
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xhr_async.send()
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setTimeout(function(){
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var xhr_sync = new XMLHttpRequest();
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xhr_sync.open('GET', 'resources/delay.py?ms=2000', false) // here's a sync request that will take 2 seconds to finish
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xhr_sync.onreadystatechange = function()
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{
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test.step(function()
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{
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actual.push('sync ' + xhr_sync.readyState)
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if(xhr_sync.readyState === 4 && actual.indexOf('async 4')>-1){
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VerifyResult()
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}
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});
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};
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xhr_sync.send()
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}, 10);
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function VerifyResult()
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{
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test.step(function()
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{
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assert_array_equals(actual, expect);
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test.done();
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});
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};
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});
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</script>
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</body>
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</html>
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