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<!--
Bug 1067491 - Test that frames keep the same index while we are recording.
-->
<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">
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<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();

    await memory.startRecordingAllocations();

    // Allocate twice with the exact same stack (hence setTimeout rather than
    // allocating directly in the generator), but with getAllocations() calls in
    // between.

    const allocs = [];
    function allocator() {
      allocs.push({});
    }

    setTimeout(allocator, 1);
    await waitForTime(2);
    const first = await memory.getAllocations();

    setTimeout(allocator, 1);
    await waitForTime(2);
    const second = await memory.getAllocations();

    await memory.stopRecordingAllocations();

    // Assert that each frame in the first response has the same index in the
    // second response. This isn't commutative, so we don't check that all
    // of the second response's frames are the same in the first response,
    // because there might be new allocations that happen after the first query
    // but before the second.

    function assertSameFrame(a, b) {
      info("  First frame = " + JSON.stringify(a, null, 4));
      info("  Second frame = " + JSON.stringify(b, null, 4));

      is(!!a, !!b);
      if (!a || !b) {
        return;
      }

      is(a.source, b.source);
      is(a.line, b.line);
      is(a.column, b.column);
      is(a.functionDisplayName, b.functionDisplayName);
      is(a.parent, b.parent);
    }

    for (let i = 0; i < first.frames.length; i++) {
      info("Checking frames at index " + i + ":");
      assertSameFrame(first.frames[i], second.frames[i]);
    }

    await memory.detach();
    destroyServerAndFinish(target);
  })();
};
</script>
</pre>
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