diff options
Diffstat (limited to 'dom/heapsnapshot/tests/unit/test_HeapAnalyses_getCreationTime_01.js')
-rw-r--r-- | dom/heapsnapshot/tests/unit/test_HeapAnalyses_getCreationTime_01.js | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getCreationTime_01.js b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getCreationTime_01.js new file mode 100644 index 000000000..5df79de7a --- /dev/null +++ b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getCreationTime_01.js @@ -0,0 +1,58 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ + +// Test that the HeapAnalyses{Client,Worker} can get a HeapSnapshot's +// creation time. + +function waitForThirtyMilliseconds() { + const start = Date.now(); + while (Date.now() - start < 30) ; +} + +function run_test() { + run_next_test(); +} + +const BREAKDOWN = { + by: "internalType", + then: { by: "count", count: true, bytes: true } +}; + +add_task(function* () { + const client = new HeapAnalysesClient(); + const start = Date.now() * 1000; + + // Because Date.now() is less precise than the snapshot's time stamp, give it + // a little bit of head room. Additionally, WinXP's timers have a granularity + // of only +/-15 ms. + waitForThirtyMilliseconds(); + const snapshotFilePath = saveNewHeapSnapshot(); + waitForThirtyMilliseconds(); + const end = Date.now() * 1000; + + yield client.readHeapSnapshot(snapshotFilePath); + ok(true, "Should have read the heap snapshot"); + + let threw = false; + try { + yield client.getCreationTime("/not/a/real/path", { + breakdown: BREAKDOWN + }); + } catch (_) { + threw = true; + } + ok(threw, "getCreationTime should throw when snapshot does not exist"); + + let time = yield client.getCreationTime(snapshotFilePath, { + breakdown: BREAKDOWN + }); + + dumpn("Start = " + start); + dumpn("End = " + end); + dumpn("Time = " + time); + + ok(time >= start, "creation time occurred after start"); + ok(time <= end, "creation time occurred before end"); + + client.destroy(); +}); |