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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <string>
#include <sstream>
#include <gtest/gtest.h>
#include "../linked_list.h"
namespace {
bool alloc_called = false;
bool free_called = false;
class LinkedListTestAllocator {
public:
typedef LinkedListEntry<const char> entry_t;
static entry_t* alloc() {
alloc_called = true;
return reinterpret_cast<entry_t*>(::malloc(sizeof(entry_t)));
}
static void free(entry_t* p) {
free_called = true;
::free(p);
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(LinkedListTestAllocator);
};
typedef LinkedList<const char, LinkedListTestAllocator> test_list_t;
std::string test_list_to_string(test_list_t& list) {
std::stringstream ss;
list.for_each([&] (const char* c) {
ss << c;
});
return ss.str();
}
};
TEST(linked_list, simple) {
alloc_called = free_called = false;
test_list_t list;
ASSERT_EQ("", test_list_to_string(list));
ASSERT_TRUE(!alloc_called);
ASSERT_TRUE(!free_called);
list.push_front("a");
ASSERT_TRUE(alloc_called);
ASSERT_TRUE(!free_called);
ASSERT_EQ("a", test_list_to_string(list));
list.push_front("b");
ASSERT_EQ("ba", test_list_to_string(list));
list.push_front("c");
list.push_front("d");
ASSERT_EQ("dcba", test_list_to_string(list));
ASSERT_TRUE(alloc_called);
ASSERT_TRUE(!free_called);
alloc_called = free_called = false;
list.remove_if([] (const char* c) {
return *c == 'c';
});
ASSERT_TRUE(!alloc_called);
ASSERT_TRUE(!free_called);
ASSERT_EQ("dba", test_list_to_string(list));
alloc_called = free_called = false;
list.remove_if([] (const char* c) {
return *c == '2';
});
ASSERT_TRUE(!alloc_called);
ASSERT_TRUE(!free_called);
ASSERT_EQ("dba", test_list_to_string(list));
list.clear();
ASSERT_TRUE(!alloc_called);
ASSERT_TRUE(free_called);
ASSERT_EQ("", test_list_to_string(list));
}
TEST(linked_list, push_pop) {
test_list_t list;
list.push_front("b");
list.push_front("a");
ASSERT_EQ("ab", test_list_to_string(list));
list.push_back("c");
ASSERT_EQ("abc", test_list_to_string(list));
ASSERT_EQ("a", list.pop_front());
ASSERT_EQ("bc", test_list_to_string(list));
ASSERT_EQ("b", list.pop_front());
ASSERT_EQ("c", test_list_to_string(list));
ASSERT_EQ("c", list.pop_front());
ASSERT_EQ("", test_list_to_string(list));
ASSERT_TRUE(list.pop_front() == nullptr);
list.push_back("r");
ASSERT_EQ("r", test_list_to_string(list));
ASSERT_EQ("r", list.pop_front());
ASSERT_TRUE(list.pop_front() == nullptr);
}
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