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Diffstat (limited to 'devtools/server/tests/chrome/test_memory_allocations_05.html')
-rw-r--r-- | devtools/server/tests/chrome/test_memory_allocations_05.html | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/devtools/server/tests/chrome/test_memory_allocations_05.html b/devtools/server/tests/chrome/test_memory_allocations_05.html new file mode 100644 index 0000000000..590b3358e4 --- /dev/null +++ b/devtools/server/tests/chrome/test_memory_allocations_05.html @@ -0,0 +1,93 @@ +<!DOCTYPE HTML> +<html> +<!-- +Bug 1068144 - Test getting the timestamps for allocations. +--> +<head> + <meta charset="utf-8"> + <title>Memory monitoring actor test</title> + <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"> +</head> +<body> +<pre id="test"> +<script src="memory-helpers.js" type="application/javascript"></script> +<script> +"use strict"; + +window.onload = function() { + SimpleTest.waitForExplicitFinish(); + + (async function() { + const { memory, target } = await startServerAndGetSelectedTabMemory(); + await memory.attach(); + + const allocs = []; + function allocator() { + allocs.push({}); + } + + // Using setTimeout results in wildly varying delays that make it hard to + // test our timestamps and results in intermittent failures. Instead, we + // actually spin an empty loop for a whole millisecond. + function actuallyWaitOneWholeMillisecond() { + const start = window.performance.now(); + // eslint-disable-next-line curly + while (window.performance.now() - start < 1.000); + } + + await memory.startRecordingAllocations(); + + allocator(); + actuallyWaitOneWholeMillisecond(); + allocator(); + actuallyWaitOneWholeMillisecond(); + allocator(); + + const response = await memory.getAllocations(); + await memory.stopRecordingAllocations(); + + ok(response.allocationsTimestamps, "The response should have timestamps."); + is(response.allocationsTimestamps.length, response.allocations.length, + "There should be a timestamp for every allocation."); + + const allocatorIndices = response.allocations + .map(function(a, idx) { + const frame = response.frames[a]; + if (frame && frame.functionDisplayName === "allocator") { + return idx; + } + return null; + }) + .filter(function(idx) { + return idx !== null; + }); + + is(allocatorIndices.length, 3, + "Should have our 3 allocations from the `allocator` timeouts."); + + let lastTimestamp; + for (let i = 0; i < 3; i++) { + const timestamp = response.allocationsTimestamps[allocatorIndices[i]]; + info("timestamp", timestamp); + ok(timestamp, "We should have a timestamp for the `allocator` allocation."); + + if (lastTimestamp) { + const delta = timestamp - lastTimestamp; + info("delta since last timestamp", delta); + // ms + ok(delta >= 1, + "The timestamp should be about 1 ms after the last timestamp."); + } + + lastTimestamp = timestamp; + } + + await memory.detach(); + destroyServerAndFinish(target); + })(); +}; +</script> +</pre> +</body> +</html> |