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abseil-cpp/absl/strings/substitute_test.cc

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// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/strings/substitute.h"
#include <cstdint>
#include <vector>
#include "gtest/gtest.h"
#include "absl/strings/str_cat.h"
namespace {
struct MyStruct {
template <typename Sink>
friend void AbslStringify(Sink& sink, const MyStruct& s) {
sink.Append("MyStruct{.value = ");
sink.Append(absl::StrCat(s.value));
sink.Append("}");
}
int value;
};
TEST(SubstituteTest, Substitute) {
// Basic.
EXPECT_EQ("Hello, world!", absl::Substitute("$0, $1!", "Hello", "world"));
// Non-char* types.
EXPECT_EQ("123 0.2 0.1 foo true false x",
absl::Substitute("$0 $1 $2 $3 $4 $5 $6", 123, 0.2, 0.1f,
std::string("foo"), true, false, 'x'));
// All int types.
EXPECT_EQ(
"-32767 65535 "
"-1234567890 3234567890 "
"-1234567890 3234567890 "
"-1234567890123456789 9234567890123456789",
absl::Substitute(
"$0 $1 $2 $3 $4 $5 $6 $7",
static_cast<short>(-32767), // NOLINT(runtime/int)
static_cast<unsigned short>(65535), // NOLINT(runtime/int)
-1234567890, 3234567890U, -1234567890L, 3234567890UL,
-int64_t{1234567890123456789}, uint64_t{9234567890123456789u}));
// Hex format
EXPECT_EQ("0 1 f ffff0ffff 0123456789abcdef",
absl::Substitute("$0$1$2$3$4 $5", //
absl::Hex(0), absl::Hex(1, absl::kSpacePad2),
absl::Hex(0xf, absl::kSpacePad2),
absl::Hex(int16_t{-1}, absl::kSpacePad5),
absl::Hex(int16_t{-1}, absl::kZeroPad5),
absl::Hex(0x123456789abcdef, absl::kZeroPad16)));
// Dec format
EXPECT_EQ("0 115 -1-0001 81985529216486895",
absl::Substitute("$0$1$2$3$4 $5", //
absl::Dec(0), absl::Dec(1, absl::kSpacePad2),
absl::Dec(0xf, absl::kSpacePad2),
absl::Dec(int16_t{-1}, absl::kSpacePad5),
absl::Dec(int16_t{-1}, absl::kZeroPad5),
absl::Dec(0x123456789abcdef, absl::kZeroPad16)));
// Pointer.
const int* int_p = reinterpret_cast<const int*>(0x12345);
std::string str = absl::Substitute("$0", int_p);
EXPECT_EQ(absl::StrCat("0x", absl::Hex(int_p)), str);
// Volatile Pointer.
// Like C++ streamed I/O, such pointers implicitly become bool
volatile int vol = 237;
volatile int* volatile volptr = &vol;
str = absl::Substitute("$0", volptr);
EXPECT_EQ("true", str);
// null is special. StrCat prints 0x0. Substitute prints NULL.
const uint64_t* null_p = nullptr;
str = absl::Substitute("$0", null_p);
EXPECT_EQ("NULL", str);
// char* is also special.
const char* char_p = "print me";
str = absl::Substitute("$0", char_p);
EXPECT_EQ("print me", str);
char char_buf[16];
strncpy(char_buf, "print me too", sizeof(char_buf));
str = absl::Substitute("$0", char_buf);
EXPECT_EQ("print me too", str);
// null char* is "doubly" special. Represented as the empty string.
char_p = nullptr;
str = absl::Substitute("$0", char_p);
EXPECT_EQ("", str);
// Out-of-order.
EXPECT_EQ("b, a, c, b", absl::Substitute("$1, $0, $2, $1", "a", "b", "c"));
// Literal $
EXPECT_EQ("$", absl::Substitute("$$"));
EXPECT_EQ("$1", absl::Substitute("$$1"));
// Test all overloads.
EXPECT_EQ("a", absl::Substitute("$0", "a"));
EXPECT_EQ("a b", absl::Substitute("$0 $1", "a", "b"));
EXPECT_EQ("a b c", absl::Substitute("$0 $1 $2", "a", "b", "c"));
EXPECT_EQ("a b c d", absl::Substitute("$0 $1 $2 $3", "a", "b", "c", "d"));
EXPECT_EQ("a b c d e",
absl::Substitute("$0 $1 $2 $3 $4", "a", "b", "c", "d", "e"));
EXPECT_EQ("a b c d e f", absl::Substitute("$0 $1 $2 $3 $4 $5", "a", "b", "c",
"d", "e", "f"));
EXPECT_EQ("a b c d e f g", absl::Substitute("$0 $1 $2 $3 $4 $5 $6", "a", "b",
"c", "d", "e", "f", "g"));
EXPECT_EQ("a b c d e f g h",
absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d", "e",
"f", "g", "h"));
EXPECT_EQ("a b c d e f g h i",
absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c", "d",
"e", "f", "g", "h", "i"));
EXPECT_EQ("a b c d e f g h i j",
absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b", "c",
"d", "e", "f", "g", "h", "i", "j"));
EXPECT_EQ("a b c d e f g h i j b0",
absl::Substitute("$0 $1 $2 $3 $4 $5 $6 $7 $8 $9 $10", "a", "b", "c",
"d", "e", "f", "g", "h", "i", "j"));
const char* null_cstring = nullptr;
EXPECT_EQ("Text: ''", absl::Substitute("Text: '$0'", null_cstring));
MyStruct s1 = MyStruct{17};
MyStruct s2 = MyStruct{1043};
EXPECT_EQ("MyStruct{.value = 17}, MyStruct{.value = 1043}",
absl::Substitute("$0, $1", s1, s2));
}
TEST(SubstituteTest, SubstituteAndAppend) {
std::string str = "Hello";
absl::SubstituteAndAppend(&str, ", $0!", "world");
EXPECT_EQ("Hello, world!", str);
// Test all overloads.
str.clear();
absl::SubstituteAndAppend(&str, "$0", "a");
EXPECT_EQ("a", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1", "a", "b");
EXPECT_EQ("a b", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2", "a", "b", "c");
EXPECT_EQ("a b c", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", "a", "b", "c", "d");
EXPECT_EQ("a b c d", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4", "a", "b", "c", "d", "e");
EXPECT_EQ("a b c d e", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5", "a", "b", "c", "d", "e",
"f");
EXPECT_EQ("a b c d e f", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6", "a", "b", "c", "d",
"e", "f", "g");
EXPECT_EQ("a b c d e f g", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7", "a", "b", "c", "d",
"e", "f", "g", "h");
EXPECT_EQ("a b c d e f g h", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8", "a", "b", "c",
"d", "e", "f", "g", "h", "i");
EXPECT_EQ("a b c d e f g h i", str);
str.clear();
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3 $4 $5 $6 $7 $8 $9", "a", "b",
"c", "d", "e", "f", "g", "h", "i", "j");
EXPECT_EQ("a b c d e f g h i j", str);
str.clear();
MyStruct s1 = MyStruct{17};
MyStruct s2 = MyStruct{1043};
absl::SubstituteAndAppend(&str, "$0, $1", s1, s2);
EXPECT_EQ("MyStruct{.value = 17}, MyStruct{.value = 1043}", str);
}
TEST(SubstituteTest, VectorBoolRef) {
std::vector<bool> v = {true, false};
const auto& cv = v;
EXPECT_EQ("true false true false",
absl::Substitute("$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]));
std::string str = "Logic be like: ";
absl::SubstituteAndAppend(&str, "$0 $1 $2 $3", v[0], v[1], cv[0], cv[1]);
EXPECT_EQ("Logic be like: true false true false", str);
}
TEST(SubstituteTest, Enums) {
enum UnscopedEnum { kEnum0 = 0, kEnum1 = 1 };
EXPECT_EQ("0 1", absl::Substitute("$0 $1", UnscopedEnum::kEnum0,
UnscopedEnum::kEnum1));
enum class ScopedEnum { kEnum0 = 0, kEnum1 = 1 };
EXPECT_EQ("0 1",
absl::Substitute("$0 $1", ScopedEnum::kEnum0, ScopedEnum::kEnum1));
enum class ScopedEnumInt32 : int32_t { kEnum0 = 989, kEnum1 = INT32_MIN };
EXPECT_EQ("989 -2147483648",
absl::Substitute("$0 $1", ScopedEnumInt32::kEnum0,
ScopedEnumInt32::kEnum1));
enum class ScopedEnumUInt32 : uint32_t { kEnum0 = 1, kEnum1 = UINT32_MAX };
EXPECT_EQ("1 4294967295", absl::Substitute("$0 $1", ScopedEnumUInt32::kEnum0,
ScopedEnumUInt32::kEnum1));
enum class ScopedEnumInt64 : int64_t { kEnum0 = -1, kEnum1 = 42949672950 };
EXPECT_EQ("-1 42949672950", absl::Substitute("$0 $1", ScopedEnumInt64::kEnum0,
ScopedEnumInt64::kEnum1));
enum class ScopedEnumUInt64 : uint64_t { kEnum0 = 1, kEnum1 = 42949672950 };
EXPECT_EQ("1 42949672950", absl::Substitute("$0 $1", ScopedEnumUInt64::kEnum0,
ScopedEnumUInt64::kEnum1));
enum class ScopedEnumChar : signed char { kEnum0 = -1, kEnum1 = 1 };
EXPECT_EQ("-1 1", absl::Substitute("$0 $1", ScopedEnumChar::kEnum0,
ScopedEnumChar::kEnum1));
enum class ScopedEnumUChar : unsigned char {
kEnum0 = 0,
kEnum1 = 1,
kEnumMax = 255
};
EXPECT_EQ("0 1 255", absl::Substitute("$0 $1 $2", ScopedEnumUChar::kEnum0,
ScopedEnumUChar::kEnum1,
ScopedEnumUChar::kEnumMax));
enum class ScopedEnumInt16 : int16_t { kEnum0 = -100, kEnum1 = 10000 };
EXPECT_EQ("-100 10000", absl::Substitute("$0 $1", ScopedEnumInt16::kEnum0,
ScopedEnumInt16::kEnum1));
enum class ScopedEnumUInt16 : uint16_t { kEnum0 = 0, kEnum1 = 10000 };
EXPECT_EQ("0 10000", absl::Substitute("$0 $1", ScopedEnumUInt16::kEnum0,
ScopedEnumUInt16::kEnum1));
}
#ifdef GTEST_HAS_DEATH_TEST
TEST(SubstituteDeathTest, SubstituteDeath) {
EXPECT_DEBUG_DEATH(
static_cast<void>(absl::Substitute(absl::string_view("-$2"), "a", "b")),
"Invalid absl::Substitute\\(\\) format string: asked for \"\\$2\", "
"but only 2 args were given.");
EXPECT_DEBUG_DEATH(
static_cast<void>(absl::Substitute(absl::string_view("-$z-"))),
"Invalid absl::Substitute\\(\\) format string: \"-\\$z-\"");
EXPECT_DEBUG_DEATH(
static_cast<void>(absl::Substitute(absl::string_view("-$"))),
"Invalid absl::Substitute\\(\\) format string: \"-\\$\"");
}
#endif // GTEST_HAS_DEATH_TEST
} // namespace