OrderedHashTable implementation with Set and Map interfaces

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

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <stdlib.h>
+
+#include "v8.h"
+
+#include "cctest.h"
+#include "factory.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));
+  ordered_set = OrderedHashSet::Remove(ordered_set, obj);
+  CHECK_EQ(0, ordered_set->NumberOfElements());
+  CHECK(!ordered_set->Contains(*obj));
+
+  // 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);
+  ordered_set = OrderedHashSet::Remove(ordered_set, obj1);
+  ordered_set = OrderedHashSet::Remove(ordered_set, obj2);
+  ordered_set = OrderedHashSet::Remove(ordered_set, obj3);
+  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());
+  CHECK(ordered_map->Lookup(*obj)->SameValue(*val));
+  ordered_map = OrderedHashMap::Put(
+      ordered_map, obj, factory->the_hole_value());
+  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());
+  CHECK(ordered_map->Lookup(*obj1)->SameValue(*val1));
+  CHECK(ordered_map->Lookup(*obj2)->SameValue(*val2));
+  CHECK(ordered_map->Lookup(*obj3)->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);
+  CHECK(ordered_map->Lookup(*obj)->SameValue(*val));
+  CHECK(ordered_map->Lookup(*obj1)->SameValue(*val1));
+  CHECK(ordered_map->Lookup(*obj2)->SameValue(*val2));
+  CHECK(ordered_map->Lookup(*obj3)->SameValue(*val3));
+  CHECK(ordered_map->Lookup(*obj4)->SameValue(*val4));
+  CHECK_EQ(5, ordered_map->NumberOfElements());
+  CHECK_EQ(4, ordered_map->NumberOfBuckets());
+
+  // Test shrinking
+  ordered_map = OrderedHashMap::Put(
+      ordered_map, obj, factory->the_hole_value());
+  ordered_map = OrderedHashMap::Put(
+      ordered_map, obj1, factory->the_hole_value());
+  ordered_map = OrderedHashMap::Put(
+      ordered_map, obj2, factory->the_hole_value());
+  ordered_map = OrderedHashMap::Put(
+      ordered_map, obj3, factory->the_hole_value());
+  CHECK_EQ(1, ordered_map->NumberOfElements());
+  CHECK_EQ(2, ordered_map->NumberOfBuckets());
+}
+
+
+}