Tab Spinner Test

From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- .../content/test/tabs/browser_tabSpinnerProbe.js | 93 ++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 browser/base/content/test/tabs/browser_tabSpinnerProbe.js (limited to 'browser/base/content/test/tabs/browser_tabSpinnerProbe.js') diff --git a/browser/base/content/test/tabs/browser_tabSpinnerProbe.js b/browser/base/content/test/tabs/browser_tabSpinnerProbe.js new file mode 100644 index 000000000..c3569c2b1 --- /dev/null +++ b/browser/base/content/test/tabs/browser_tabSpinnerProbe.js @@ -0,0 +1,93 @@ +"use strict"; + +/** + * Tests the FX_TAB_SWITCH_SPINNER_VISIBLE_MS and + * FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS telemetry probes + */ +let gMinHangTime = 500; // ms +let gMaxHangTime = 5 * 1000; // ms + +/** + * Make a data URI for a generic webpage with a script that hangs for a given + * amount of time. + * @param {?Number} aHangMs Number of milliseconds that the hang should last. + * Defaults to 0. + * @return {String} The data URI generated. + */ +function makeDataURI(aHangMs = 0) { + return `data:text/html, + + + + Tab Spinner Test + + + + + + `; +} + +/** + * Returns the sum of all values in an array. + * @param {Array} aArray An array of integers + * @return {Number} The sum of the integers in the array + */ +function sum(aArray) { + return aArray.reduce(function(previousValue, currentValue) { + return previousValue + currentValue; + }); +} + +/** + * A generator intended to be run as a Task. It tests one of the tab spinner + * telemetry probes. + * @param {String} aProbe The probe to test. Should be one of: + * - FX_TAB_SWITCH_SPINNER_VISIBLE_MS + * - FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS + */ +function* testProbe(aProbe) { + info(`Testing probe: ${aProbe}`); + let histogram = Services.telemetry.getHistogramById(aProbe); + let buckets = histogram.snapshot().ranges.filter(function(value) { + return (value > gMinHangTime && value < gMaxHangTime); + }); + let delayTime = buckets[0]; // Pick a bucket arbitrarily + + // The tab spinner does not show up instantly. We need to hang for a little + // bit of extra time to account for the tab spinner delay. + delayTime += gBrowser.selectedTab.linkedBrowser.getTabBrowser()._getSwitcher().TAB_SWITCH_TIMEOUT; + let dataURI1 = makeDataURI(delayTime); + let dataURI2 = makeDataURI(); + + let tab1 = yield BrowserTestUtils.openNewForegroundTab(gBrowser, dataURI1); + histogram.clear(); + // Queue a hang in the content process when the + // event loop breathes next. + ContentTask.spawn(tab1.linkedBrowser, null, function*() { + content.wrappedJSObject.hang(); + }); + let tab2 = yield BrowserTestUtils.openNewForegroundTab(gBrowser, dataURI2); + let snapshot = histogram.snapshot(); + yield BrowserTestUtils.removeTab(tab2); + yield BrowserTestUtils.removeTab(tab1); + ok(sum(snapshot.counts) > 0, + `Spinner probe should now have a value in some bucket`); +} + +add_task(function* setup() { + yield SpecialPowers.pushPrefEnv({ + set: [["dom.ipc.processCount", 1]] + }); +}); + +add_task(testProbe.bind(null, "FX_TAB_SWITCH_SPINNER_VISIBLE_MS")); +add_task(testProbe.bind(null, "FX_TAB_SWITCH_SPINNER_VISIBLE_LONG_MS")); -- cgit v1.2.3