forked from mirrors/gecko-dev
de54c4e1fc
This allows us to remove the timeout (which was there for these prefs) and makes the code a bit more explicit. Unconditionally making all tests wait for rAF causes some timing changes which cause some tests to time out / fail, see: https://treeherder.mozilla.org/jobs?repo=try&revision=3aef4c168c6ab7d762dd360f49d4f56dff686c03 So this only does it when changing the prefs that care about it. Fix some tests that were relying on the timeout to get this green. Differential Revision: https://phabricator.services.mozilla.com/D119040
52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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"use strict";
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/**
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* Check that we record hangs in the parent process in telemetry events.
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* This test would be an xpcshell test except xpcshell does not think
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* it is running e10s (see bug 1568333).
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*/
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add_task(async function test_browser_hang() {
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// Trip some testing code to ensure we can test this. Sadly, this is a magic
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// number corresponding to code in XPCJSContext.cpp
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await SpecialPowers.pushPrefEnv({
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set: [["dom.max_chrome_script_run_time", 2]]
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});
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await SpecialPowers.promiseTimeout(0);
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// Hang for 1.2 seconds.
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let now = Date.now();
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let i = 0;
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info("Start loop");
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while (Date.now() - now < 2500) {
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// The system clock can go backwards. Don't time out the test:
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if (Date.now() - now < 0) {
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info("Yikes, the system clock changed while running this test.");
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now = Date.now();
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}
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i++;
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}
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let duration = (Date.now() - now) / 1000;
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info("Looped " + i + " iterations.");
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let events;
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await TestUtils.waitForCondition(() => {
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events = Services.telemetry.snapshotEvents(
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Ci.nsITelemetry.DATASET_ALL_CHANNELS,
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false
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);
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return events.parent?.some(e => e[1] == "slow_script_warning");
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}, "Should find an event after doing this.").catch(e => ok(false, e));
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events = (events.parent || []);
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let event = events.find(e => e[1] == "slow_script_warning");
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ok(event, "Should have registered an event.");
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if (event) {
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is(event[3], "browser", "Should register as browser hang.");
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let args = event[5];
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is(args.uri_type, "browser", "Should register browser uri type.");
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Assert.greater(duration + 1, parseFloat(args.hang_duration), "hang duration should not exaggerate.");
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Assert.less(duration - 1, parseFloat(args.hang_duration), "hang duration should not undersell.");
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}
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});
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