v8/test/cctest/test-ordered-hash-table.cc

// Copyright 2014 the V8 project authors. All rights reserved.
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#include <stdlib.h>

#include "src/v8.h"

#include "src/factory.h"
#include "test/cctest/cctest.h"

namespace {

using namespace v8::internal;


TEST(Set) {
  LocalContext context;
  Isolate* isolate = CcTest::i_isolate();
  Factory* factory = isolate->factory();
  HandleScope scope(isolate);
  Handle<OrderedHashSet> ordered_set = factory->NewOrderedHashSet();
  CHECK_EQ(2, ordered_set->NumberOfBuckets());
  CHECK_EQ(0, ordered_set->NumberOfElements());
  CHECK_EQ(0, ordered_set->NumberOfDeletedElements());

  Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
  Handle<JSObject> obj = factory->NewJSObjectFromMap(map);
  CHECK(!ordered_set->Contains(obj));
  ordered_set = OrderedHashSet::Add(ordered_set, obj);
  CHECK_EQ(1, ordered_set->NumberOfElements());
  CHECK(ordered_set->Contains(obj));
  bool was_present = false;
  ordered_set = OrderedHashSet::Remove(ordered_set, obj, &was_present);
  CHECK(was_present);
  CHECK_EQ(0, ordered_set->NumberOfElements());
  CHECK(!ordered_set->Contains(obj));

  // Removing a not-present object should set was_present to false.
  ordered_set = OrderedHashSet::Remove(ordered_set, obj, &was_present);
  CHECK(!was_present);

  // Test for collisions/chaining
  Handle<JSObject> obj1 = factory->NewJSObjectFromMap(map);
  ordered_set = OrderedHashSet::Add(ordered_set, obj1);
  Handle<JSObject> obj2 = factory->NewJSObjectFromMap(map);
  ordered_set = OrderedHashSet::Add(ordered_set, obj2);
  Handle<JSObject> obj3 = factory->NewJSObjectFromMap(map);
  ordered_set = OrderedHashSet::Add(ordered_set, obj3);
  CHECK_EQ(3, ordered_set->NumberOfElements());
  CHECK(ordered_set->Contains(obj1));
  CHECK(ordered_set->Contains(obj2));
  CHECK(ordered_set->Contains(obj3));

  // Test growth
  ordered_set = OrderedHashSet::Add(ordered_set, obj);
  Handle<JSObject> obj4 = factory->NewJSObjectFromMap(map);
  ordered_set = OrderedHashSet::Add(ordered_set, obj4);
  CHECK(ordered_set->Contains(obj));
  CHECK(ordered_set->Contains(obj1));
  CHECK(ordered_set->Contains(obj2));
  CHECK(ordered_set->Contains(obj3));
  CHECK(ordered_set->Contains(obj4));
  CHECK_EQ(5, ordered_set->NumberOfElements());
  CHECK_EQ(0, ordered_set->NumberOfDeletedElements());
  CHECK_EQ(4, ordered_set->NumberOfBuckets());

  // Test shrinking
  ordered_set = OrderedHashSet::Remove(ordered_set, obj, &was_present);
  CHECK(was_present);
  ordered_set = OrderedHashSet::Remove(ordered_set, obj1, &was_present);
  CHECK(was_present);
  ordered_set = OrderedHashSet::Remove(ordered_set, obj2, &was_present);
  CHECK(was_present);
  ordered_set = OrderedHashSet::Remove(ordered_set, obj3, &was_present);
  CHECK(was_present);
  CHECK_EQ(1, ordered_set->NumberOfElements());
  CHECK_EQ(2, ordered_set->NumberOfBuckets());
}


TEST(Map) {
  LocalContext context;
  Isolate* isolate = CcTest::i_isolate();
  Factory* factory = isolate->factory();
  HandleScope scope(isolate);
  Handle<OrderedHashMap> ordered_map = factory->NewOrderedHashMap();
  CHECK_EQ(2, ordered_map->NumberOfBuckets());
  CHECK_EQ(0, ordered_map->NumberOfElements());
  CHECK_EQ(0, ordered_map->NumberOfDeletedElements());

  Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
  Handle<JSObject> obj = factory->NewJSObjectFromMap(map);
  Handle<JSObject> val = factory->NewJSObjectFromMap(map);
  CHECK(ordered_map->Lookup(obj)->IsTheHole());
  ordered_map = OrderedHashMap::Put(ordered_map, obj, val);
  CHECK_EQ(1, ordered_map->NumberOfElements());
  Object* lookup = ordered_map->Lookup(obj);
  CHECK(lookup->SameValue(*val));
  bool was_present = false;
  ordered_map = OrderedHashMap::Remove(ordered_map, obj, &was_present);
  CHECK(was_present);
  CHECK_EQ(0, ordered_map->NumberOfElements());
  CHECK(ordered_map->Lookup(obj)->IsTheHole());

  // Test for collisions/chaining
  Handle<JSObject> obj1 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> obj2 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> obj3 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> val1 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> val2 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> val3 = factory->NewJSObjectFromMap(map);
  ordered_map = OrderedHashMap::Put(ordered_map, obj1, val1);
  ordered_map = OrderedHashMap::Put(ordered_map, obj2, val2);
  ordered_map = OrderedHashMap::Put(ordered_map, obj3, val3);
  CHECK_EQ(3, ordered_map->NumberOfElements());
  lookup = ordered_map->Lookup(obj1);
  CHECK(lookup->SameValue(*val1));
  lookup = ordered_map->Lookup(obj2);
  CHECK(lookup->SameValue(*val2));
  lookup = ordered_map->Lookup(obj3);
  CHECK(lookup->SameValue(*val3));

  // Test growth
  ordered_map = OrderedHashMap::Put(ordered_map, obj, val);
  Handle<JSObject> obj4 = factory->NewJSObjectFromMap(map);
  Handle<JSObject> val4 = factory->NewJSObjectFromMap(map);
  ordered_map = OrderedHashMap::Put(ordered_map, obj4, val4);
  lookup = ordered_map->Lookup(obj);
  CHECK(lookup->SameValue(*val));
  lookup = ordered_map->Lookup(obj1);
  CHECK(lookup->SameValue(*val1));
  lookup = ordered_map->Lookup(obj2);
  CHECK(lookup->SameValue(*val2));
  lookup = ordered_map->Lookup(obj3);
  CHECK(lookup->SameValue(*val3));
  lookup = ordered_map->Lookup(obj4);
  CHECK(lookup->SameValue(*val4));
  CHECK_EQ(5, ordered_map->NumberOfElements());
  CHECK_EQ(4, ordered_map->NumberOfBuckets());

  // Test shrinking
  ordered_map = OrderedHashMap::Remove(ordered_map, obj, &was_present);
  CHECK(was_present);
  ordered_map = OrderedHashMap::Remove(ordered_map, obj1, &was_present);
  CHECK(was_present);
  ordered_map = OrderedHashMap::Remove(ordered_map, obj2, &was_present);
  CHECK(was_present);
  ordered_map = OrderedHashMap::Remove(ordered_map, obj3, &was_present);
  CHECK(was_present);
  CHECK_EQ(1, ordered_map->NumberOfElements());
  CHECK_EQ(2, ordered_map->NumberOfBuckets());
}


}