зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
3.4 KiB
HTML
106 строки
3.4 KiB
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>Writer starvation</title>
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<link rel="author" href="mailto:odinho@opera.com" title="Odin Hørthe Omdal">
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<meta name=timeout content=long>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<script src=support.js></script>
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<script>
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var db, read_request_count = 0, read_success_count = 0;
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var write_request_count = 0, write_success_count = 0;
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var RQ_COUNT = 25;
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var open_rq = createdb(async_test(undefined));
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open_rq.onupgradeneeded = function(e) {
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db = e.target.result;
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db.createObjectStore("s")
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.add("1", 1);
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}
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open_rq.onsuccess = function(e) {
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var i = 0, continue_reading = true;
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/* Pre-fill some read requests */
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for (i = 0; i < RQ_COUNT; i++)
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{
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read_request_count++;
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db.transaction("s")
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.objectStore("s")
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.get(1)
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.onsuccess = this.step_func(function(e) {
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read_success_count++;
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assert_equals(e.target.transaction.mode, "readonly");
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});
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}
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this.step(loop);
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function loop() {
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read_request_count++;
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db.transaction("s")
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.objectStore("s")
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.get(1)
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.onsuccess = this.step_func(function(e)
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{
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read_success_count++;
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assert_equals(e.target.transaction.mode, "readonly");
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if (read_success_count >= RQ_COUNT && write_request_count == 0)
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{
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write_request_count++;
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db.transaction("s", "readwrite")
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.objectStore("s")
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.add("written", read_request_count)
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.onsuccess = this.step_func(function(e)
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{
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write_success_count++;
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assert_equals(e.target.transaction.mode, "readwrite");
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assert_equals(e.target.result, read_success_count,
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"write cb came before later read cb's")
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});
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/* Reads done after the write */
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for (i = 0; i < 5; i++)
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{
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read_request_count++;
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db.transaction("s")
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.objectStore("s")
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.get(1)
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.onsuccess = this.step_func(function(e)
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{
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read_success_count++;
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});
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}
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}
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});
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if (read_success_count < RQ_COUNT + 5)
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step_timeout(this.step_func(loop), write_request_count ? 1000 : 100);
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else
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// This is merely a "nice" hack to run finish after the last request is done
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db.transaction("s")
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.objectStore("s")
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.count()
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.onsuccess = this.step_func(function()
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{
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step_timeout(this.step_func(finish), 100);
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});
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}
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}
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function finish() {
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assert_equals(read_request_count, read_success_count, "read counts");
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assert_equals(write_request_count, write_success_count, "write counts");
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this.done();
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}
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</script>
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<div id=log></div>
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