The Tor Browser: toolkit/components/osfile/tests/xpcshell/test

     1 "use strict";

     3 let {OS: {File, Path, Constants}} = Components.utils.import("resource://gre/modules/osfile.jsm", {});

     4 let {Services} = Components.utils.import("resource://gre/modules/Services.jsm", {});

     6 // Ensure that we have a profile but that the OS.File worker is not launched

     7 add_task(function* init() {

     8   do_get_profile();

     9   yield File.resetWorker();

    10 });

    12 function getCount(histogram) {

    13   if (histogram == null) {

    14     return 0;

    15   }

    17   let total = 0;

    18   for (let i of histogram.counts) {

    19     total += i;

    20   }

    21   return total;

    22 }

    24 // Ensure that launching the OS.File worker adds data to the relevant

    25 // histograms

    26 add_task(function* test_startup() {

    27   let LAUNCH = "OSFILE_WORKER_LAUNCH_MS";

    28   let READY = "OSFILE_WORKER_READY_MS";

    30   let before = Services.telemetry.histogramSnapshots;

    32   // Launch the OS.File worker

    33   yield File.getCurrentDirectory();

    35   let after = Services.telemetry.histogramSnapshots;

    38   do_print("Ensuring that we have recorded measures for histograms");

    39   do_check_eq(getCount(after[LAUNCH]), getCount(before[LAUNCH]) + 1);

    40   do_check_eq(getCount(after[READY]), getCount(before[READY]) + 1);

    42   do_print("Ensuring that launh <= ready");

    43   do_check_true(after[LAUNCH].sum <= after[READY].sum);

    44 });

    46 // Ensure that calling writeAtomic adds data to the relevant histograms

    47 add_task(function* test_writeAtomic() {

    48   let LABEL = "OSFILE_WRITEATOMIC_JANK_MS";

    50   let before = Services.telemetry.histogramSnapshots;

    52   // Perform a write.

    53   let path = Path.join(Constants.Path.profileDir, "test_osfile_telemetry.tmp");

    54   yield File.writeAtomic(path, LABEL, { tmpPath: path + ".tmp" } );

    56   let after = Services.telemetry.histogramSnapshots;

    58   do_check_eq(getCount(after[LABEL]), getCount(before[LABEL]) + 1);

    59 });

    61 function run_test() {

    62   run_next_test();

    63 }

The Tor Browser / file revision