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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /browser/base/content/test/tabs/browser_tabSpinnerProbe.js | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'browser/base/content/test/tabs/browser_tabSpinnerProbe.js')
| -rw-r--r-- | browser/base/content/test/tabs/browser_tabSpinnerProbe.js | 93 |
1 files changed, 93 insertions, 0 deletions
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, + <html> + <head> + <meta charset="utf-8"/> + <title>Tab Spinner Test</title> + <script> + function hang() { + let hangDuration = ${aHangMs}; + if (hangDuration > 0) { + let startTime = window.performance.now(); + while(window.performance.now() - startTime < hangDuration) {} + } + } + </script> + </head> + <body> + <h1 id='header'>Tab Spinner Test</h1> + </body> + </html>`; +} + +/** + * 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")); |