tenfourfox/devtools/shared/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();
}