diff options
Diffstat (limited to 'devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_creationTime_01.js')
-rw-r--r-- | devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_creationTime_01.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_creationTime_01.js b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_creationTime_01.js new file mode 100644 index 0000000000..e18c79752f --- /dev/null +++ b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapSnapshot_creationTime_01.js @@ -0,0 +1,33 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ +"use strict"; + +// HeapSnapshot.prototype.creationTime returns the expected time. + +function waitForThirtyMilliseconds() { + const start = Date.now(); + while (Date.now() - start < 30) { + // do nothing + } +} + +function run_test() { + const start = Date.now() * 1000; + info("start = " + start); + + // Because Date.now() is less precise than the snapshot's time stamp, give it + // a little bit of head room. Additionally, WinXP's timer only has granularity + // of +/- 15ms. + waitForThirtyMilliseconds(); + const path = ChromeUtils.saveHeapSnapshot({ runtime: true }); + waitForThirtyMilliseconds(); + + const end = Date.now() * 1000; + info("end = " + end); + + const snapshot = ChromeUtils.readHeapSnapshot(path); + info("snapshot.creationTime = " + snapshot.creationTime); + + Assert.greaterOrEqual(snapshot.creationTime, start); + Assert.lessOrEqual(snapshot.creationTime, end); +} |