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// Copyright (c) 2009 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 "testing/gtest/include/gtest/gtest.h"
namespace {
class IDMapTest : public testing::Test {
};
class TestObject {
};
class DestructorCounter {
public:
explicit DestructorCounter(int* counter) : counter_(counter) {}
~DestructorCounter() { ++(*counter_); }
private:
int* counter_;
};
TEST_F(IDMapTest, Basic) {
IDMap<TestObject> map;
EXPECT_TRUE(map.IsEmpty());
EXPECT_EQ(0U, map.size());
TestObject obj1;
TestObject obj2;
int32 id1 = map.Add(&obj1);
EXPECT_FALSE(map.IsEmpty());
EXPECT_EQ(1U, map.size());
EXPECT_EQ(&obj1, map.Lookup(id1));
int32 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));
}
TEST_F(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);
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());
}
TEST_F(IDMapTest, IteratorRemainsValidWhenRemovingOtherElements) {
IDMap<TestObject> map;
const int kCount = 5;
TestObject obj[kCount];
int32 ids[kCount];
for (int i = 0; i < kCount; i++)
ids[i] = map.Add(&obj[i]);
int counter = 0;
for (IDMap<TestObject>::const_iterator iter(&map);
!iter.IsAtEnd(); iter.Advance()) {
switch (counter) {
case 0:
EXPECT_EQ(ids[0], iter.GetCurrentKey());
EXPECT_EQ(&obj[0], iter.GetCurrentValue());
map.Remove(ids[1]);
break;
case 1:
EXPECT_EQ(ids[2], iter.GetCurrentKey());
EXPECT_EQ(&obj[2], iter.GetCurrentValue());
map.Remove(ids[3]);
break;
case 2:
EXPECT_EQ(ids[4], iter.GetCurrentKey());
EXPECT_EQ(&obj[4], iter.GetCurrentValue());
map.Remove(ids[0]);
break;
default:
FAIL() << "should not have that many elements";
break;
}
counter++;
}
}
TEST_F(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;
DestructorCounter* owned_obj[kCount];
int map_owned_ids[kCount];
IDMap<DestructorCounter> map_external;
IDMap<DestructorCounter, IDMapOwnPointer> 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]);
owned_obj[i] = new DestructorCounter(&owned_del_count);
map_owned_ids[i] = map_owned.Add(owned_obj[i]);
}
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_F(IDMapTest, OwningPointersDeletesThemOnDestruct) {
const int kCount = 3;
int external_del_count = 0;
DestructorCounter* external_obj[kCount];
int map_external_ids[kCount];
int owned_del_count = 0;
DestructorCounter* owned_obj[kCount];
int map_owned_ids[kCount];
{
IDMap<DestructorCounter> map_external;
IDMap<DestructorCounter, IDMapOwnPointer> 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]);
owned_obj[i] = new DestructorCounter(&owned_del_count);
map_owned_ids[i] = map_owned.Add(owned_obj[i]);
}
}
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);
}
} // namespace
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