1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdlib.h>
18 #include <string>
19 #include <sstream>
20
21 #include <gtest/gtest.h>
22
23 #include "../linked_list.h"
24
25 namespace {
26
27 bool alloc_called = false;
28 bool free_called = false;
29
30 class LinkedListTestAllocator {
31 public:
32 typedef LinkedListEntry<const char> entry_t;
33
alloc()34 static entry_t* alloc() {
35 alloc_called = true;
36 return reinterpret_cast<entry_t*>(::malloc(sizeof(entry_t)));
37 }
38
free(entry_t * p)39 static void free(entry_t* p) {
40 free_called = true;
41 ::free(p);
42 }
43 private:
44 DISALLOW_IMPLICIT_CONSTRUCTORS(LinkedListTestAllocator);
45 };
46
47 typedef LinkedList<const char, LinkedListTestAllocator> test_list_t;
48
test_list_to_string(test_list_t & list)49 std::string test_list_to_string(test_list_t& list) {
50 std::stringstream ss;
51 list.for_each([&] (const char* c) {
52 ss << c;
53 });
54
55 return ss.str();
56 }
57
58 };
59
TEST(linked_list,simple)60 TEST(linked_list, simple) {
61 alloc_called = free_called = false;
62 test_list_t list;
63 ASSERT_EQ("", test_list_to_string(list));
64 ASSERT_TRUE(!alloc_called);
65 ASSERT_TRUE(!free_called);
66 list.push_front("a");
67 ASSERT_TRUE(alloc_called);
68 ASSERT_TRUE(!free_called);
69 ASSERT_EQ("a", test_list_to_string(list));
70 list.push_front("b");
71 ASSERT_EQ("ba", test_list_to_string(list));
72 list.push_front("c");
73 list.push_front("d");
74 ASSERT_EQ("dcba", test_list_to_string(list));
75 ASSERT_TRUE(alloc_called);
76 ASSERT_TRUE(!free_called);
77 alloc_called = free_called = false;
78 list.remove_if([] (const char* c) {
79 return *c == 'c';
80 });
81
82 ASSERT_TRUE(!alloc_called);
83 ASSERT_TRUE(!free_called);
84
85 ASSERT_EQ("dba", test_list_to_string(list));
86 alloc_called = free_called = false;
87 list.remove_if([] (const char* c) {
88 return *c == '2';
89 });
90 ASSERT_TRUE(!alloc_called);
91 ASSERT_TRUE(!free_called);
92 ASSERT_EQ("dba", test_list_to_string(list));
93 list.clear();
94 ASSERT_TRUE(!alloc_called);
95 ASSERT_TRUE(free_called);
96 ASSERT_EQ("", test_list_to_string(list));
97 }
98
TEST(linked_list,push_pop)99 TEST(linked_list, push_pop) {
100 test_list_t list;
101 list.push_front("b");
102 list.push_front("a");
103 ASSERT_EQ("ab", test_list_to_string(list));
104 list.push_back("c");
105 ASSERT_EQ("abc", test_list_to_string(list));
106 ASSERT_EQ("a", list.pop_front());
107 ASSERT_EQ("bc", test_list_to_string(list));
108 ASSERT_EQ("b", list.pop_front());
109 ASSERT_EQ("c", test_list_to_string(list));
110 ASSERT_EQ("c", list.pop_front());
111 ASSERT_EQ("", test_list_to_string(list));
112 ASSERT_TRUE(list.pop_front() == nullptr);
113 list.push_back("r");
114 ASSERT_EQ("r", test_list_to_string(list));
115 ASSERT_EQ("r", list.pop_front());
116 ASSERT_TRUE(list.pop_front() == nullptr);
117 }
118