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
|
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/debug/alias.h"
#include <algorithm>
#include <memory>
#include <string>
#include "testing/gtest/include/gtest/gtest.h"
TEST(DebugAlias, Test) {
constexpr char kTestString[] = "string contents";
constexpr auto kTestStringLength = std::string_view(kTestString).size();
std::unique_ptr<std::string> input =
std::make_unique<std::string>(kTestString);
// Verify the contents get copied + the new local variable has the right type
// when the array size given is exactly `input->size() + 1`.
DEBUG_ALIAS_FOR_CSTR(copy1, input->c_str(),
kTestStringLength + 1 /* == input->size() + 1 */);
static_assert(std::is_same_v<decltype(copy1), char[kTestStringLength + 1]>);
EXPECT_TRUE(
std::equal(std::begin(kTestString), std::end(kTestString), copy1));
// Verify that the copy is properly null-terminated even when it is smaller
// than the input string.
DEBUG_ALIAS_FOR_CSTR(copy2, input->c_str(), 3 /* < input->size() */);
static_assert(std::is_same_v<decltype(copy2), char[3]>);
EXPECT_TRUE(std::equal(std::begin(copy2), std::end(copy2), "st"));
// Verify that the copy is properly null-terminated even when it is larger
// than the input string.
DEBUG_ALIAS_FOR_CSTR(copy3, input->c_str(), 100 /* > input->size() + 1 */);
static_assert(std::is_same_v<decltype(copy3), char[100]>);
EXPECT_TRUE(
std::equal(std::begin(kTestString), std::end(kTestString), copy3));
}
TEST(DebugAlias, U16String) {
constexpr char16_t kTestString[] = u"H͟e͟l͟l͟o͟ ͟w͟o͟r͟l͟d͟!͟";
constexpr auto kTestStringLength = std::u16string_view(kTestString).size();
std::u16string input = kTestString;
// Verify the contents get copied + the new local variable has the right type
// when the array size given is exactly `input->size() + 1`.
DEBUG_ALIAS_FOR_U16CSTR(aliased_copy, input.c_str(), kTestStringLength + 1);
static_assert(
std::is_same_v<decltype(aliased_copy), char16_t[kTestStringLength + 1]>);
EXPECT_TRUE(
std::equal(std::begin(kTestString), std::end(kTestString), aliased_copy));
// Verify that the copy is properly null-terminated even when it is larger
// than the input string.
DEBUG_ALIAS_FOR_U16CSTR(aliased_copy2, input.c_str(), kTestStringLength + 1);
static_assert(
std::is_same_v<decltype(aliased_copy2), char16_t[kTestStringLength + 1]>);
EXPECT_TRUE(std::equal(std::begin(kTestString), std::end(kTestString),
aliased_copy2));
}
TEST(DebugAlias, U16StringPartialCopy) {
std::u16string input = u"Hello world!";
DEBUG_ALIAS_FOR_U16CSTR(aliased_copy, input.c_str(), 5);
// Make sure we don't write past the specified number of characters. We
// subtract 1 to account for the null terminator.
EXPECT_EQ(input.substr(0, 4), aliased_copy);
}
|
