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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/id_map.h"
#include <stdint.h>
#include <memory>
#include "base/memory/ptr_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class TestObject {
};
class DestructorCounter {
public:
explicit DestructorCounter(int* counter) : counter_(counter) {}
~DestructorCounter() { ++(*counter_); }
private:
int* counter_;
};
TEST(IDMapTest, Basic) {
IDMap<TestObject*> map;
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
TestObject obj1;
TestObject obj2;
int32_t id1 = map.Add(&obj1);
EXPECT_FALSE(map.IsEmpty());
EXPECT_EQ(1U, map.size());
EXPECT_EQ(&obj1, map.Lookup(id1));
int32_t id2 = map.Add(&obj2);
EXPECT_FALSE(map.IsEmpty());
EXPECT_EQ(2U, map.size());
EXPECT_EQ(&obj1, map.Lookup(id1));
EXPECT_EQ(&obj2, map.Lookup(id2));
map.Remove(id1);
EXPECT_FALSE(map.IsEmpty());
EXPECT_EQ(1U, map.size());
map.Remove(id2);
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
map.AddWithID(&obj1, 1);
map.AddWithID(&obj2, 2);
EXPECT_EQ(&obj1, map.Lookup(1));
EXPECT_EQ(&obj2, map.Lookup(2));
EXPECT_EQ(&obj2, map.Replace(2, &obj1));
EXPECT_EQ(&obj1, map.Lookup(2));
EXPECT_EQ(0, map.iteration_depth());
}
TEST(IDMapTest, IteratorRemainsValidWhenRemovingCurrentElement) {
IDMap<TestObject*> map;
TestObject obj1;
TestObject obj2;
TestObject obj3;
map.Add(&obj1);
map.Add(&obj2);
map.Add(&obj3);
{
IDMap<TestObject*>::const_iterator iter(&map);
EXPECT_EQ(1, map.iteration_depth());
while (!iter.IsAtEnd()) {
map.Remove(iter.GetCurrentKey());
iter.Advance();
}
// Test that while an iterator is still in scope, we get the map emptiness
// right (http://crbug.com/35571).
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
}
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
EXPECT_EQ(0, map.iteration_depth());
}
TEST(IDMapTest, IteratorRemainsValidWhenRemovingOtherElements) {
IDMap<TestObject*> map;
const int kCount = 5;
TestObject obj[kCount];
for (int i = 0; i < kCount; i++)
map.Add(&obj[i]);
// IDMap uses a hash_map, which has no predictable iteration order.
int32_t ids_in_iteration_order[kCount];
const TestObject* objs_in_iteration_order[kCount];
int counter = 0;
for (IDMap<TestObject*>::const_iterator iter(&map); !iter.IsAtEnd();
iter.Advance()) {
ids_in_iteration_order[counter] = iter.GetCurrentKey();
objs_in_iteration_order[counter] = iter.GetCurrentValue();
counter++;
}
counter = 0;
for (IDMap<TestObject*>::const_iterator iter(&map); !iter.IsAtEnd();
iter.Advance()) {
EXPECT_EQ(1, map.iteration_depth());
switch (counter) {
case 0:
EXPECT_EQ(ids_in_iteration_order[0], iter.GetCurrentKey());
EXPECT_EQ(objs_in_iteration_order[0], iter.GetCurrentValue());
map.Remove(ids_in_iteration_order[1]);
break;
case 1:
EXPECT_EQ(ids_in_iteration_order[2], iter.GetCurrentKey());
EXPECT_EQ(objs_in_iteration_order[2], iter.GetCurrentValue());
map.Remove(ids_in_iteration_order[3]);
break;
case 2:
EXPECT_EQ(ids_in_iteration_order[4], iter.GetCurrentKey());
EXPECT_EQ(objs_in_iteration_order[4], iter.GetCurrentValue());
map.Remove(ids_in_iteration_order[0]);
break;
default:
FAIL() << "should not have that many elements";
break;
}
counter++;
}
EXPECT_EQ(0, map.iteration_depth());
}
TEST(IDMapTest, CopyIterator) {
IDMap<TestObject*> map;
TestObject obj1;
TestObject obj2;
TestObject obj3;
map.Add(&obj1);
map.Add(&obj2);
map.Add(&obj3);
EXPECT_EQ(0, map.iteration_depth());
{
IDMap<TestObject*>::const_iterator iter1(&map);
EXPECT_EQ(1, map.iteration_depth());
// Make sure that copying the iterator correctly increments
// map's iteration depth.
IDMap<TestObject*>::const_iterator iter2(iter1);
EXPECT_EQ(2, map.iteration_depth());
}
// Make sure after destroying all iterators the map's iteration depth
// returns to initial state.
EXPECT_EQ(0, map.iteration_depth());
}
TEST(IDMapTest, AssignIterator) {
IDMap<TestObject*> map;
TestObject obj1;
TestObject obj2;
TestObject obj3;
map.Add(&obj1);
map.Add(&obj2);
map.Add(&obj3);
EXPECT_EQ(0, map.iteration_depth());
{
IDMap<TestObject*>::const_iterator iter1(&map);
EXPECT_EQ(1, map.iteration_depth());
IDMap<TestObject*>::const_iterator iter2(&map);
EXPECT_EQ(2, map.iteration_depth());
// Make sure that assigning the iterator correctly updates
// map's iteration depth (-1 for destruction, +1 for assignment).
EXPECT_EQ(2, map.iteration_depth());
}
// Make sure after destroying all iterators the map's iteration depth
// returns to initial state.
EXPECT_EQ(0, map.iteration_depth());
}
TEST(IDMapTest, IteratorRemainsValidWhenClearing) {
IDMap<TestObject*> map;
const int kCount = 5;
TestObject obj[kCount];
for (int i = 0; i < kCount; i++)
map.Add(&obj[i]);
// IDMap uses a hash_map, which has no predictable iteration order.
int32_t ids_in_iteration_order[kCount];
const TestObject* objs_in_iteration_order[kCount];
int counter = 0;
for (IDMap<TestObject*>::const_iterator iter(&map); !iter.IsAtEnd();
iter.Advance()) {
ids_in_iteration_order[counter] = iter.GetCurrentKey();
objs_in_iteration_order[counter] = iter.GetCurrentValue();
counter++;
}
counter = 0;
for (IDMap<TestObject*>::const_iterator iter(&map); !iter.IsAtEnd();
iter.Advance()) {
switch (counter) {
case 0:
EXPECT_EQ(ids_in_iteration_order[0], iter.GetCurrentKey());
EXPECT_EQ(objs_in_iteration_order[0], iter.GetCurrentValue());
break;
case 1:
EXPECT_EQ(ids_in_iteration_order[1], iter.GetCurrentKey());
EXPECT_EQ(objs_in_iteration_order[1], iter.GetCurrentValue());
map.Clear();
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
break;
default:
FAIL() << "should not have that many elements";
break;
}
counter++;
}
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
}
TEST(IDMapTest, OwningPointersDeletesThemOnRemove) {
const int kCount = 3;
int external_del_count = 0;
DestructorCounter* external_obj[kCount];
int map_external_ids[kCount];
int owned_del_count = 0;
int map_owned_ids[kCount];
IDMap<DestructorCounter*> map_external;
IDMap<std::unique_ptr<DestructorCounter>> map_owned;
for (int i = 0; i < kCount; ++i) {
external_obj[i] = new DestructorCounter(&external_del_count);
map_external_ids[i] = map_external.Add(external_obj[i]);
map_owned_ids[i] =
map_owned.Add(base::MakeUnique<DestructorCounter>(&owned_del_count));
}
for (int i = 0; i < kCount; ++i) {
EXPECT_EQ(external_del_count, 0);
EXPECT_EQ(owned_del_count, i);
map_external.Remove(map_external_ids[i]);
map_owned.Remove(map_owned_ids[i]);
}
for (int i = 0; i < kCount; ++i) {
delete external_obj[i];
}
EXPECT_EQ(external_del_count, kCount);
EXPECT_EQ(owned_del_count, kCount);
}
TEST(IDMapTest, OwningPointersDeletesThemOnClear) {
const int kCount = 3;
int external_del_count = 0;
DestructorCounter* external_obj[kCount];
int owned_del_count = 0;
IDMap<DestructorCounter*> map_external;
IDMap<std::unique_ptr<DestructorCounter>> map_owned;
for (int i = 0; i < kCount; ++i) {
external_obj[i] = new DestructorCounter(&external_del_count);
map_external.Add(external_obj[i]);
map_owned.Add(base::MakeUnique<DestructorCounter>(&owned_del_count));
}
EXPECT_EQ(external_del_count, 0);
EXPECT_EQ(owned_del_count, 0);
map_external.Clear();
map_owned.Clear();
EXPECT_EQ(external_del_count, 0);
EXPECT_EQ(owned_del_count, kCount);
for (int i = 0; i < kCount; ++i) {
delete external_obj[i];
}
EXPECT_EQ(external_del_count, kCount);
EXPECT_EQ(owned_del_count, kCount);
}
TEST(IDMapTest, OwningPointersDeletesThemOnDestruct) {
const int kCount = 3;
int external_del_count = 0;
DestructorCounter* external_obj[kCount];
int owned_del_count = 0;
{
IDMap<DestructorCounter*> map_external;
IDMap<std::unique_ptr<DestructorCounter>> map_owned;
for (int i = 0; i < kCount; ++i) {
external_obj[i] = new DestructorCounter(&external_del_count);
map_external.Add(external_obj[i]);
map_owned.Add(base::MakeUnique<DestructorCounter>(&owned_del_count));
}
}
EXPECT_EQ(external_del_count, 0);
for (int i = 0; i < kCount; ++i) {
delete external_obj[i];
}
EXPECT_EQ(external_del_count, kCount);
EXPECT_EQ(owned_del_count, kCount);
}
TEST(IDMapTest, Int64KeyType) {
IDMap<TestObject*, int64_t> map;
TestObject obj1;
const int64_t kId1 = 999999999999999999;
map.AddWithID(&obj1, kId1);
EXPECT_EQ(&obj1, map.Lookup(kId1));
IDMap<TestObject*, int64_t>::const_iterator iter(&map);
ASSERT_FALSE(iter.IsAtEnd());
EXPECT_EQ(kId1, iter.GetCurrentKey());
EXPECT_EQ(&obj1, iter.GetCurrentValue());
iter.Advance();
ASSERT_TRUE(iter.IsAtEnd());
map.Remove(kId1);
EXPECT_TRUE(map.IsEmpty());
}
} // namespace
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