forked from mirrors/gecko-dev
112 lines
3.4 KiB
JavaScript
112 lines
3.4 KiB
JavaScript
"use strict";
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var gAnimHistogram = Services.telemetry.getHistogramById(
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"FX_TAB_CLOSE_TIME_ANIM_MS"
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);
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var gNoAnimHistogram = Services.telemetry.getHistogramById(
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"FX_TAB_CLOSE_TIME_NO_ANIM_MS"
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);
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/**
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* Takes a Telemetry histogram snapshot and returns the sum of all counts.
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*
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* @param snapshot (Object)
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* The Telemetry histogram snapshot to examine.
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* @return (int)
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* The sum of all counts in the snapshot.
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*/
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function snapshotCount(snapshot) {
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// Use Array.prototype.reduce to sum up all of the
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// snapshot.count entries
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return Object.values(snapshot.values).reduce((a, b) => a + b, 0);
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}
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/**
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* Takes a Telemetry histogram snapshot and makes sure
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* that the sum of all counts equals expectedCount.
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*
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* @param snapshot (Object)
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* The Telemetry histogram snapshot to examine.
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* @param expectedCount (int)
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* What we expect the number of incremented counts to be. For example,
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* If we expect this probe to have only had a single recording, this
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* would be 1. If we expected it to have not recorded any data at all,
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* this would be 0.
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*/
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function assertCount(snapshot, expectedCount) {
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Assert.equal(
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snapshotCount(snapshot),
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expectedCount,
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`Should only be ${expectedCount} collected value.`
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);
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}
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/**
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* Takes a Telemetry histogram and waits for the sum of all counts becomes
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* equal to expectedCount.
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*
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* @param histogram (Object)
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* The Telemetry histogram to examine.
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* @param expectedCount (int)
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* What we expect the number of incremented counts to become.
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* @return (Promise)
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* @resolves When the histogram snapshot count becomes the expected count.
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*/
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function waitForSnapshotCount(histogram, expectedCount) {
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return BrowserTestUtils.waitForCondition(() => {
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return snapshotCount(histogram.snapshot()) == expectedCount;
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}, `Collected value should become ${expectedCount}.`);
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}
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add_task(async function setup() {
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// Force-enable tab animations
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gReduceMotionOverride = false;
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// These probes are opt-in, meaning we only capture them if extended
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// Telemetry recording is enabled.
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let oldCanRecord = Services.telemetry.canRecordExtended;
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Services.telemetry.canRecordExtended = true;
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registerCleanupFunction(() => {
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Services.telemetry.canRecordExtended = oldCanRecord;
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});
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});
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/**
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* Tests the FX_TAB_CLOSE_TIME_ANIM_MS probe by closing a tab with the tab
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* close animation.
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*/
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add_task(async function test_close_time_anim_probe() {
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let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser);
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await BrowserTestUtils.waitForCondition(() => tab._fullyOpen);
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gAnimHistogram.clear();
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gNoAnimHistogram.clear();
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BrowserTestUtils.removeTab(tab, { animate: true });
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await waitForSnapshotCount(gAnimHistogram, 1);
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assertCount(gNoAnimHistogram.snapshot(), 0);
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gAnimHistogram.clear();
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gNoAnimHistogram.clear();
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});
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/**
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* Tests the FX_TAB_CLOSE_TIME_NO_ANIM_MS probe by closing a tab without the
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* tab close animation.
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*/
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add_task(async function test_close_time_no_anim_probe() {
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let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser);
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await BrowserTestUtils.waitForCondition(() => tab._fullyOpen);
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gAnimHistogram.clear();
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gNoAnimHistogram.clear();
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BrowserTestUtils.removeTab(tab, { animate: false });
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await waitForSnapshotCount(gNoAnimHistogram, 1);
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assertCount(gAnimHistogram.snapshot(), 0);
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gAnimHistogram.clear();
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gNoAnimHistogram.clear();
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});
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