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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/
*/
"use strict";
const { Assert } = ChromeUtils.import("resource://testing-common/Assert.jsm");
const { TelemetryTestUtils } = ChromeUtils.import(
"resource://testing-common/TelemetryTestUtils.jsm"
);
const PRELOAD_PREF = "network.preload";
const PRELOAD_HISTOGRAMS = [
"TIME_TO_LOAD_EVENT_START_PRELOAD_MS",
"TIME_TO_LOAD_EVENT_END_PRELOAD_MS",
];
const NO_PRELOAD_HISTOGRAMS = [
"TIME_TO_LOAD_EVENT_START_NO_PRELOAD_MS",
"TIME_TO_LOAD_EVENT_END_NO_PRELOAD_MS",
];
const TEST_ROOT = getRootDirectory(gTestPath).replace(
"chrome://mochitests/content",
"http://mochi.test:8888"
);
function setupTest(prefValue) {
Services.prefs.setBoolPref(PRELOAD_PREF, prefValue);
registerCleanupFunction(() => {
Services.prefs.clearUserPref(PRELOAD_PREF);
});
const preloadHistograms = PRELOAD_HISTOGRAMS.map(name =>
TelemetryTestUtils.getAndClearHistogram(name)
);
const noPreloadHistograms = NO_PRELOAD_HISTOGRAMS.map(name =>
TelemetryTestUtils.getAndClearHistogram(name)
);
return [preloadHistograms, noPreloadHistograms];
}
function telemetrySubmitted(preloadHistograms, noPreloadHistograms) {
function reducer(acc, histogram) {
if (Object.values(histogram.snapshot().values).length) {
acc += 1;
}
return acc;
}
return TestUtils.waitForCondition(() => {
return (
preloadHistograms.reduce(reducer, 0) == 2 ||
noPreloadHistograms.reduce(reducer, 0) == 2
);
}, "Waiting for telemetry to be collected");
}
async function runTest({
uri,
preloadHistograms,
noPreloadHistograms,
shouldPreload,
}) {
await Promise.all([
BrowserTestUtils.loadURI(gBrowser.selectedBrowser, uri),
BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser, undefined, uri),
]);
await telemetrySubmitted(preloadHistograms, noPreloadHistograms);
const [expected, unexpected] = shouldPreload
? [preloadHistograms, noPreloadHistograms]
: [noPreloadHistograms, preloadHistograms];
// We don't know what the actual load times will be. We just know there
// should be exactly one key in each of these histograms that has the value
// 1.
for (const histogram of expected) {
const values = Object.values(histogram.snapshot().values).filter(
value => value > 0
);
ok(values.length == 1, `${histogram.name()} should contain an entry`);
histogram.clear();
}
for (const histogram of unexpected) {
Assert.deepEqual(
histogram.snapshot().values,
{},
`${histogram.name()} should not contain an entry`
);
histogram.clear();
}
}
const TESTS = [
{
uri: `${TEST_ROOT}contain_ifame.html`,
shouldPreload: false,
},
{
uri: `${TEST_ROOT}preload_iframe.html`,
shouldPreload: true,
},
{
uri: `${TEST_ROOT}preload_iframe_nested.html`,
shouldPreload: true,
},
{
uri: `${TEST_ROOT}preload_link_header.sjs`,
shouldPreload: true,
},
{
uri: `${TEST_ROOT}preload_link_header.sjs?nested`,
shouldPreload: true,
},
];
add_task(async function test_loadNoPreload() {
const [preloadHistograms, noPreloadHistograms] = setupTest(
/* network.preload = */ false
);
for (const [i, test] of TESTS.entries()) {
info(`Running test ${i} with network.preload=false: ${test.uri}`);
await runTest({
uri: test.uri,
shouldPreload: test.shouldPreload,
preloadHistograms,
noPreloadHistograms,
});
}
});
add_task(async function test_loadPreload() {
const [preloadHistograms, noPreloadHistograms] = setupTest(
/* network.preload = */ true
);
for (const [i, test] of TESTS.entries()) {
info(`Running test ${i} with network.preload=true: uri=${test.uri}`);
await runTest({
uri: test.uri,
shouldPreload: test.shouldPreload,
preloadHistograms,
noPreloadHistograms,
});
}
});
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