palemoon-dev/platform/dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_06.js

/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

// Check HeapSnapshot.prototype.takeCensus handling of 'breakdown' argument.
//
// Ported from js/src/jit-test/tests/debug/Memory-takeCensus-06.js

function run_test() {
  var Pattern = Match.Pattern;

  var g = newGlobal();
  var dbg = new Debugger(g);

  Pattern({ count: Pattern.NATURAL,
            bytes: Pattern.NATURAL })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "count" } }));

  let census = saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "count", count: false, bytes: false } });
  equal("count" in census, false);
  equal("bytes" in census, false);

  census = saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "count", count: true, bytes: false } });
  equal("count" in census, true);
  equal("bytes" in census, false);

  census = saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "count", count: false, bytes: true } });
  equal("count" in census, false);
  equal("bytes" in census, true);

  census = saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "count", count: true, bytes: true } });
  equal("count" in census, true);
  equal("bytes" in census, true);


  // Pattern doesn't mind objects with extra properties, so we'll restrict this
  // list to the object classes we're pretty sure are going to stick around for
  // the forseeable future.
  Pattern({
    Function:       { count: Pattern.NATURAL },
    Object:         { count: Pattern.NATURAL },
    Debugger:       { count: Pattern.NATURAL },
    Sandbox:        { count: Pattern.NATURAL },

            // The below are all Debugger prototype objects.
    Source:         { count: Pattern.NATURAL },
    Environment:    { count: Pattern.NATURAL },
    Script:         { count: Pattern.NATURAL },
    Memory:         { count: Pattern.NATURAL },
    Frame:          { count: Pattern.NATURAL }
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "objectClass" } }));

  Pattern({
    objects:        { count: Pattern.NATURAL },
    scripts:        { count: Pattern.NATURAL },
    strings:        { count: Pattern.NATURAL },
    other:          { count: Pattern.NATURAL }
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "coarseType" } }));

  // As for { by: 'objectClass' }, restrict our pattern to the types
  // we predict will stick around for a long time.
  Pattern({
    JSString:             { count: Pattern.NATURAL },
    "js::Shape":          { count: Pattern.NATURAL },
    JSObject:             { count: Pattern.NATURAL },
    JSScript:             { count: Pattern.NATURAL }
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "internalType" } }));


  // Nested breakdowns.

  let coarseTypePattern = {
    objects:        { count: Pattern.NATURAL },
    scripts:        { count: Pattern.NATURAL },
    strings:        { count: Pattern.NATURAL },
    other:          { count: Pattern.NATURAL }
  };

  Pattern({
    JSString:    coarseTypePattern,
    "js::Shape": coarseTypePattern,
    JSObject:    coarseTypePattern,
    JSScript:    coarseTypePattern,
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, {
      breakdown: { by: "internalType",
                   then: { by: "coarseType" }
      }
    }));

  Pattern({
    Function:       { count: Pattern.NATURAL },
    Object:         { count: Pattern.NATURAL },
    Debugger:       { count: Pattern.NATURAL },
    Sandbox:        { count: Pattern.NATURAL },
    other:          coarseTypePattern
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, {
      breakdown: {
        by: "objectClass",
        then:  { by: "count" },
        other: { by: "coarseType" }
      }
    }));

  Pattern({
    objects: { count: Pattern.NATURAL, label: "object" },
    scripts: { count: Pattern.NATURAL, label: "scripts" },
    strings: { count: Pattern.NATURAL, label: "strings" },
    other:   { count: Pattern.NATURAL, label: "other" }
  })
    .assert(saveHeapSnapshotAndTakeCensus(dbg, {
      breakdown: {
        by: "coarseType",
        objects: { by: "count", label: "object" },
        scripts: { by: "count", label: "scripts" },
        strings: { by: "count", label: "strings" },
        other:   { by: "count", label: "other" }
      }
    }));

  do_test_finished();
}