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
|
// Copyright 2017 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/strings/strcat.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(StrCat, 8Bit) {
EXPECT_EQ("", StrCat({""}));
EXPECT_EQ("1", StrCat({"1"}));
EXPECT_EQ("122", StrCat({"1", "22"}));
EXPECT_EQ("122333", StrCat({"1", "22", "333"}));
EXPECT_EQ("1223334444", StrCat({"1", "22", "333", "4444"}));
EXPECT_EQ("122333444455555", StrCat({"1", "22", "333", "4444", "55555"}));
}
TEST(StrCat, 16Bit) {
string16 arg1 = ASCIIToUTF16("1");
string16 arg2 = ASCIIToUTF16("22");
string16 arg3 = ASCIIToUTF16("333");
EXPECT_EQ(ASCIIToUTF16(""), StrCat({string16()}));
EXPECT_EQ(ASCIIToUTF16("1"), StrCat({arg1}));
EXPECT_EQ(ASCIIToUTF16("122"), StrCat({arg1, arg2}));
EXPECT_EQ(ASCIIToUTF16("122333"), StrCat({arg1, arg2, arg3}));
}
TEST(StrAppend, 8Bit) {
std::string result;
result = "foo";
StrAppend(&result, {std::string()});
EXPECT_EQ("foo", result);
result = "foo";
StrAppend(&result, {"1"});
EXPECT_EQ("foo1", result);
result = "foo";
StrAppend(&result, {"1", "22", "333"});
EXPECT_EQ("foo122333", result);
}
TEST(StrAppend, 16Bit) {
string16 arg1 = ASCIIToUTF16("1");
string16 arg2 = ASCIIToUTF16("22");
string16 arg3 = ASCIIToUTF16("333");
string16 result;
result = ASCIIToUTF16("foo");
StrAppend(&result, {string16()});
EXPECT_EQ(ASCIIToUTF16("foo"), result);
result = ASCIIToUTF16("foo");
StrAppend(&result, {arg1});
EXPECT_EQ(ASCIIToUTF16("foo1"), result);
result = ASCIIToUTF16("foo");
StrAppend(&result, {arg1, arg2, arg3});
EXPECT_EQ(ASCIIToUTF16("foo122333"), result);
}
TEST(StrAppendT, ReserveAdditionalIfNeeded) {
std::string str = "foo";
const char* prev_data = str.data();
size_t prev_capacity = str.capacity();
// Fully exhaust current capacity.
StrAppend(&str, {std::string(str.capacity() - str.size(), 'o')});
// Expect that we hit capacity, but didn't require a re-alloc.
EXPECT_EQ(str.capacity(), str.size());
EXPECT_EQ(prev_data, str.data());
EXPECT_EQ(prev_capacity, str.capacity());
// Force a re-alloc by appending another character.
StrAppend(&str, {"o"});
// Expect at least 2x growth in capacity.
EXPECT_LE(2 * prev_capacity, str.capacity());
}
} // namespace base
|
