1 // Copyright 2017 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "absl/strings/substitute.h"
16
17 #include <cstdint>
18 #include <vector>
19
20 #include "gtest/gtest.h"
21 #include "absl/strings/str_cat.h"
22
23 namespace {
24
TEST(SubstituteTest,Substitute)25 TEST(SubstituteTest, Substitute) {
26 // Basic.
27 EXPECT_EQ("Hello, world!", absl::Substitute("$0, $1!", "Hello", "world"));
28
29 // Non-char* types.
30 EXPECT_EQ("123 0.2 0.1 foo true false x",
31 absl::Substitute("$0 $1 $2 $3 $4 $5 $6", 123, 0.2, 0.1f,
32 std::string("foo"), true, false, 'x'));
33
34 // All int types.
35 EXPECT_EQ(
36 "-32767 65535 "
37 "-1234567890 3234567890 "
38 "-1234567890 3234567890 "
39 "-1234567890123456789 9234567890123456789",
40 absl::Substitute(
41 "$0 $1 $2 $3 $4 $5 $6 $7",
42 static_cast<short>(-32767), // NOLINT(runtime/int)
43 static_cast<unsigned short>(65535), // NOLINT(runtime/int)
44 -1234567890, 3234567890U, -1234567890L, 3234567890UL,
45 -int64_t{1234567890123456789}, uint64_t{9234567890123456789u}));
46
47 // Hex format
48 EXPECT_EQ("0 1 f ffff0ffff 0123456789abcdef",
49 absl::Substitute("$0$1$2$3$4 $5", //
50 absl::Hex(0), absl::Hex(1, absl::kSpacePad2),
51 absl::Hex(0xf, absl::kSpacePad2),
52 absl::Hex(int16_t{-1}, absl::kSpacePad5),
53 absl::Hex(int16_t{-1}, absl::kZeroPad5),
54 absl::Hex(0x123456789abcdef, absl::kZeroPad16)));
55
56 // Dec format
57 EXPECT_EQ("0 115 -1-0001 81985529216486895",
58 absl::Substitute("$0$1$2$3$4 $5", //
59 absl::Dec(0), absl::Dec(1, absl::kSpacePad2),
60 absl::Dec(0xf, absl::kSpacePad2),
61 absl::Dec(int16_t{-1}, absl::kSpacePad5),
62 absl::Dec(int16_t{-1}, absl::kZeroPad5),
63 absl::Dec(0x123456789abcdef, absl::kZeroPad16)));
64
65 // Pointer.
66 const int* int_p = reinterpret_cast<const int*>(0x12345);
67 std::string str = absl::Substitute("$0", int_p);
68 EXPECT_EQ(absl::StrCat("0x", absl::Hex(int_p)), str);
69
70 // Volatile Pointer.
71 // Like C++ streamed I/O, such pointers implicitly become bool
72 volatile int vol = 237;
73 volatile int *volatile volptr = &vol;
74 str = absl::Substitute("$0", volptr);
75 EXPECT_EQ("true", str);
76
77 // null is special. StrCat prints 0x0. Substitute prints NULL.
78 const uint64_t* null_p = nullptr;
79 str = absl::Substitute("$0", null_p);
80 EXPECT_EQ("NULL", str);
81
82 // char* is also special.
83 const char* char_p = "print me";
84 str = absl::Substitute("$0", char_p);
85 EXPECT_EQ("print me", str);
86
87 char char_buf[16];
88 strncpy(char_buf, "print me too", sizeof(char_buf));
89 str = absl::Substitute("$0", char_buf);
90 EXPECT_EQ("print me too", str);
91
92 // null char* is "doubly" special. Represented as the empty std::string.
93 char_p = nullptr;
94 str = absl::Substitute("$0", char_p);
95 EXPECT_EQ("", str);
96
97 // Out-of-order.
98 EXPECT_EQ("b, a, c, b", absl::Substitute("$1, $0, $2, $1", "a", "b", "c"));
99
100 // Literal $
101 EXPECT_EQ("$", absl::Substitute("$$"));
102
103 EXPECT_EQ("$1", absl::Substitute("$$1"));
104
105 // Test all overloads.
106 EXPECT_EQ("a", absl::Substitute("$0", "a"));
107 EXPECT_EQ("a b", absl::Substitute("$0 $1", "a", "b"));
108 EXPECT_EQ("a b c", absl::Substitute("$0 $1 $2", "a", "b", "c"));
109 EXPECT_EQ("a b c d", absl::Substitute("$0 $1 $2 $3", "a", "b", "c", "d"));
110 EXPECT_EQ("a b c d e",
111 absl::Substitute("$0 $1 $2 $3 $4", "a", "b", "c", "d", "e"));
112 EXPECT_EQ("a b c d e f", absl::Substitute("$0 $1 $2 $3 $4 $5", "a", "b", "c",
113 "d", "e", "f"));
114 EXPECT_EQ("a b c d e f g", absl::Substitute("$0 $1 $2 $3 $4 $5 $6", "a", "b",
115 "c", "d", "e", "f", "g"));
116 EXPECT_EQ("a b c d e f g h",
117 absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d", "e",
118 "f", "g", "h"));
119 EXPECT_EQ("a b c d e f g h i",
120 absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c", "d",
121 "e", "f", "g", "h", "i"));
122 EXPECT_EQ("a b c d e f g h i j",
123 absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b", "c",
124 "d", "e", "f", "g", "h", "i", "j"));
125 EXPECT_EQ("a b c d e f g h i j b0",
126 absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9 $10", "a", "b", "c",
127 "d", "e", "f", "g", "h", "i", "j"));
128
129 const char* null_cstring = nullptr;
130 EXPECT_EQ("Text: ''", absl::Substitute("Text: '$0'", null_cstring));
131 }
132
TEST(SubstituteTest,SubstituteAndAppend)133 TEST(SubstituteTest, SubstituteAndAppend) {
134 std::string str = "Hello";
135 absl::SubstituteAndAppend(&str, ", $0!", "world");
136 EXPECT_EQ("Hello, world!", str);
137
138 // Test all overloads.
139 str.clear();
140 absl::SubstituteAndAppend(&str, "$0", "a");
141 EXPECT_EQ("a", str);
142 str.clear();
143 absl::SubstituteAndAppend(&str, "$0 $1", "a", "b");
144 EXPECT_EQ("a b", str);
145 str.clear();
146 absl::SubstituteAndAppend(&str, "$0 $1 $2", "a", "b", "c");
147 EXPECT_EQ("a b c", str);
148 str.clear();
149 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", "a", "b", "c", "d");
150 EXPECT_EQ("a b c d", str);
151 str.clear();
152 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4", "a", "b", "c", "d", "e");
153 EXPECT_EQ("a b c d e", str);
154 str.clear();
155 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5", "a", "b", "c", "d", "e",
156 "f");
157 EXPECT_EQ("a b c d e f", str);
158 str.clear();
159 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6", "a", "b", "c", "d",
160 "e", "f", "g");
161 EXPECT_EQ("a b c d e f g", str);
162 str.clear();
163 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d",
164 "e", "f", "g", "h");
165 EXPECT_EQ("a b c d e f g h", str);
166 str.clear();
167 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c",
168 "d", "e", "f", "g", "h", "i");
169 EXPECT_EQ("a b c d e f g h i", str);
170 str.clear();
171 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b",
172 "c", "d", "e", "f", "g", "h", "i", "j");
173 EXPECT_EQ("a b c d e f g h i j", str);
174 }
175
TEST(SubstituteTest,VectorBoolRef)176 TEST(SubstituteTest, VectorBoolRef) {
177 std::vector<bool> v = {true, false};
178 const auto& cv = v;
179 EXPECT_EQ("true false true false",
180 absl::Substitute("$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]));
181
182 std::string str = "Logic be like: ";
183 absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]);
184 EXPECT_EQ("Logic be like: true false true false", str);
185 }
186
187 #ifdef GTEST_HAS_DEATH_TEST
188
TEST(SubstituteDeathTest,SubstituteDeath)189 TEST(SubstituteDeathTest, SubstituteDeath) {
190 EXPECT_DEBUG_DEATH(
191 static_cast<void>(absl::Substitute(absl::string_view("-$2"), "a", "b")),
192 "Invalid absl::Substitute\\(\\) format std::string: asked for \"\\$2\", "
193 "but only 2 args were given.");
194 EXPECT_DEBUG_DEATH(
195 static_cast<void>(absl::Substitute(absl::string_view("-$z-"))),
196 "Invalid absl::Substitute\\(\\) format std::string: \"-\\$z-\"");
197 EXPECT_DEBUG_DEATH(
198 static_cast<void>(absl::Substitute(absl::string_view("-$"))),
199 "Invalid absl::Substitute\\(\\) format std::string: \"-\\$\"");
200 }
201
202 #endif // GTEST_HAS_DEATH_TEST
203
204 } // namespace
205