forked from facebook/yoga
-
Notifications
You must be signed in to change notification settings - Fork 0
/
SingleWriterValueListTest.cpp
164 lines (123 loc) · 3.42 KB
/
SingleWriterValueListTest.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include <gtest/gtest.h>
#include <yoga/util/SingleWriterValueList.h>
#include <numeric>
#include <type_traits>
#include <unordered_set>
namespace facebook {
namespace yoga {
static_assert(
!std::is_copy_constructible<SingleWriterValueList<int>>::value,
"SingleWriterValueList must not be copyable");
static_assert(
!std::is_copy_assignable<SingleWriterValueList<int>>::value,
"SingleWriterValueList must not be copyable");
static_assert(
!std::is_copy_constructible<SingleWriterValueList<int>::Borrowed>::value,
"SingleWriterValueList::Borrowed must not be copyable");
static_assert(
!std::is_copy_assignable<SingleWriterValueList<int>::Borrowed>::value,
"SingleWriterValueList::Borrowed must not be copyable");
static_assert(
std::is_move_constructible<SingleWriterValueList<int>::Borrowed>::value,
"SingleWriterValueList::Borrowed must be movable");
static_assert(
std::is_move_assignable<SingleWriterValueList<int>::Borrowed>::value,
"SingleWriterValueList::Borrowed must be movable");
TEST(SingleWriterValueList, borrowsAreExclusive) {
SingleWriterValueList<int> x{};
auto a = x.borrow();
auto b = x.borrow();
ASSERT_NE(&a.get(), &b.get());
}
TEST(SingleWriterValueList, borrowsSupportDereference) {
SingleWriterValueList<int> x{};
auto a = x.borrow();
*a = 123;
ASSERT_EQ(*a, 123);
}
TEST(SingleWriterValueList, borrowsHaveGetMethod) {
SingleWriterValueList<int> x{};
auto a = x.borrow();
a.get() = 123;
ASSERT_EQ(a.get(), 123);
}
TEST(SingleWriterValueList, exposesBorrowsViaIterator) {
SingleWriterValueList<int> x{};
auto a = x.borrow();
auto b = x.borrow();
*a = 12;
*b = 34;
int sum = 0;
for (auto& i : x) {
sum += i;
}
ASSERT_EQ(sum, 12 + 34);
}
TEST(SingleWriterValueList, exposesBorrowsViaConstIterator) {
SingleWriterValueList<int> x{};
auto a = x.borrow();
auto b = x.borrow();
*a = 12;
*b = 34;
ASSERT_EQ(std::accumulate(x.cbegin(), x.cend(), 0), 12 + 34);
}
TEST(SingleWriterValueList, doesNotDeallocateReturnedBorrows) {
SingleWriterValueList<int> x{};
std::unordered_set<const int*> values;
{
auto a = x.borrow();
auto b = x.borrow();
values.insert(&a.get());
values.insert(&b.get());
}
auto it = x.begin();
ASSERT_NE(it, x.end());
ASSERT_NE(values.find(&*it), values.end());
ASSERT_NE(++it, x.end());
ASSERT_NE(values.find(&*it), values.end());
}
TEST(SingleWriterValueList, reusesReturnedBorrows) {
SingleWriterValueList<int> x{};
int* firstBorrow;
{
auto a = x.borrow();
firstBorrow = &a.get();
}
auto b = x.borrow();
ASSERT_EQ(&b.get(), firstBorrow);
}
TEST(SingleWriterValueList, keepsValuesAfterReturning) {
SingleWriterValueList<int> x{};
{
auto a = x.borrow();
*a = 123;
}
ASSERT_EQ(*x.begin(), 123);
}
static void addOne(int& v) {
v += 1;
}
TEST(SingleWriterValueList, allowsCustomReturnPolicy) {
SingleWriterValueList<int, addOne> x{};
{
auto a = x.borrow();
*a = 123;
}
ASSERT_EQ(*x.begin(), 124);
}
TEST(SingleWriterValueList, hasConvenienceResetPolicy) {
SingleWriterValueList<int, SingleWriterValueList<int>::resetPolicy> x{};
{
auto a = x.borrow();
*a = 123;
}
ASSERT_EQ(*x.begin(), 0);
}
} // namespace yoga
} // namespace facebook