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StringSwitchTest.cpp
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//===- llvm/unittest/ADT/StringSwitchTest.cpp - StringSwitch unit tests ---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringSwitch.h"
#include "gtest/gtest.h"
using namespace llvm;
TEST(StringSwitchTest, Case) {
auto Translate = [](StringRef S) {
return llvm::StringSwitch<int>(S)
.Case("0", 0)
.Case("1", 1)
.Case("2", 2)
.Case("3", 3)
.Case("4", 4)
.Case("5", 5)
.Case("6", 6)
.Case("7", 7)
.Case("8", 8)
.Case("9", 9)
.Case("A", 10)
.Case("B", 11)
.Case("C", 12)
.Case("D", 13)
.Case("E", 14)
.Case("F", 15)
.Default(-1);
};
EXPECT_EQ(1, Translate("1"));
EXPECT_EQ(2, Translate("2"));
EXPECT_EQ(11, Translate("B"));
EXPECT_EQ(-1, Translate("b"));
EXPECT_EQ(-1, Translate(""));
EXPECT_EQ(-1, Translate("Test"));
}
TEST(StringSwitchTest, CaseLower) {
auto Translate = [](StringRef S) {
return llvm::StringSwitch<int>(S)
.Case("0", 0)
.Case("1", 1)
.Case("2", 2)
.Case("3", 3)
.Case("4", 4)
.Case("5", 5)
.Case("6", 6)
.Case("7", 7)
.Case("8", 8)
.Case("9", 9)
.CaseLower("A", 10)
.CaseLower("B", 11)
.CaseLower("C", 12)
.CaseLower("D", 13)
.CaseLower("E", 14)
.CaseLower("F", 15)
.Default(-1);
};
EXPECT_EQ(1, Translate("1"));
EXPECT_EQ(2, Translate("2"));
EXPECT_EQ(11, Translate("B"));
EXPECT_EQ(11, Translate("b"));
EXPECT_EQ(-1, Translate(""));
EXPECT_EQ(-1, Translate("Test"));
}
TEST(StringSwitchTest, StartsWith) {
auto Translate = [](StringRef S) {
return llvm::StringSwitch<std::function<int(int, int)>>(S)
.StartsWith("add", [](int X, int Y) { return X + Y; })
.StartsWith("sub", [](int X, int Y) { return X - Y; })
.StartsWith("mul", [](int X, int Y) { return X * Y; })
.StartsWith("div", [](int X, int Y) { return X / Y; })
.Default([](int X, int Y) { return 0; });
};
EXPECT_EQ(15, Translate("adder")(10, 5));
EXPECT_EQ(5, Translate("subtracter")(10, 5));
EXPECT_EQ(50, Translate("multiplier")(10, 5));
EXPECT_EQ(2, Translate("divider")(10, 5));
EXPECT_EQ(0, Translate("nothing")(10, 5));
EXPECT_EQ(0, Translate("ADDER")(10, 5));
}
TEST(StringSwitchTest, StartsWithLower) {
auto Translate = [](StringRef S) {
return llvm::StringSwitch<std::function<int(int, int)>>(S)
.StartsWithLower("add", [](int X, int Y) { return X + Y; })
.StartsWithLower("sub", [](int X, int Y) { return X - Y; })
.StartsWithLower("mul", [](int X, int Y) { return X * Y; })
.StartsWithLower("div", [](int X, int Y) { return X / Y; })
.Default([](int X, int Y) { return 0; });
};
EXPECT_EQ(15, Translate("adder")(10, 5));
EXPECT_EQ(5, Translate("subtracter")(10, 5));
EXPECT_EQ(50, Translate("multiplier")(10, 5));
EXPECT_EQ(2, Translate("divider")(10, 5));
EXPECT_EQ(15, Translate("AdDeR")(10, 5));
EXPECT_EQ(5, Translate("SuBtRaCtEr")(10, 5));
EXPECT_EQ(50, Translate("MuLtIpLiEr")(10, 5));
EXPECT_EQ(2, Translate("DiViDeR")(10, 5));
EXPECT_EQ(0, Translate("nothing")(10, 5));
}
TEST(StringSwitchTest, EndsWith) {
enum class Suffix { Possible, PastTense, Process, InProgressAction, Unknown };
auto Translate = [](StringRef S) {
return llvm::StringSwitch<Suffix>(S)
.EndsWith("able", Suffix::Possible)
.EndsWith("ed", Suffix::PastTense)
.EndsWith("ation", Suffix::Process)
.EndsWith("ing", Suffix::InProgressAction)
.Default(Suffix::Unknown);
};
EXPECT_EQ(Suffix::Possible, Translate("optimizable"));
EXPECT_EQ(Suffix::PastTense, Translate("optimized"));
EXPECT_EQ(Suffix::Process, Translate("optimization"));
EXPECT_EQ(Suffix::InProgressAction, Translate("optimizing"));
EXPECT_EQ(Suffix::Unknown, Translate("optimizer"));
EXPECT_EQ(Suffix::Unknown, Translate("OPTIMIZABLE"));
}
TEST(StringSwitchTest, EndsWithLower) {
enum class Suffix { Possible, PastTense, Process, InProgressAction, Unknown };
auto Translate = [](StringRef S) {
return llvm::StringSwitch<Suffix>(S)
.EndsWithLower("able", Suffix::Possible)
.EndsWithLower("ed", Suffix::PastTense)
.EndsWithLower("ation", Suffix::Process)
.EndsWithLower("ing", Suffix::InProgressAction)
.Default(Suffix::Unknown);
};
EXPECT_EQ(Suffix::Possible, Translate("optimizable"));
EXPECT_EQ(Suffix::Possible, Translate("OPTIMIZABLE"));
EXPECT_EQ(Suffix::PastTense, Translate("optimized"));
EXPECT_EQ(Suffix::Process, Translate("optimization"));
EXPECT_EQ(Suffix::InProgressAction, Translate("optimizing"));
EXPECT_EQ(Suffix::Unknown, Translate("optimizer"));
}
TEST(StringSwitchTest, Cases) {
enum class OSType { Windows, Linux, Unknown };
auto Translate = [](StringRef S) {
return llvm::StringSwitch<OSType>(S)
.Cases(StringLiteral::withInnerNUL("wind\0ws"), "win32", "winnt",
OSType::Windows)
.Cases("linux", "unix", "*nix", "posix", OSType::Linux)
.Default(OSType::Unknown);
};
EXPECT_EQ(OSType::Windows, Translate(llvm::StringRef("wind\0ws", 7)));
EXPECT_EQ(OSType::Windows, Translate("win32"));
EXPECT_EQ(OSType::Windows, Translate("winnt"));
EXPECT_EQ(OSType::Linux, Translate("linux"));
EXPECT_EQ(OSType::Linux, Translate("unix"));
EXPECT_EQ(OSType::Linux, Translate("*nix"));
EXPECT_EQ(OSType::Linux, Translate("posix"));
// Note that the whole null-terminator embedded string is required for the
// case to match.
EXPECT_EQ(OSType::Unknown, Translate("wind"));
EXPECT_EQ(OSType::Unknown, Translate("Windows"));
EXPECT_EQ(OSType::Unknown, Translate(""));
}
TEST(StringSwitchTest, CasesLower) {
enum class OSType { Windows, Linux, Unknown };
auto Translate = [](StringRef S) {
return llvm::StringSwitch<OSType>(S)
.CasesLower(StringLiteral::withInnerNUL("wind\0ws"), "win32", "winnt",
OSType::Windows)
.CasesLower("linux", "unix", "*nix", "posix", OSType::Linux)
.Default(OSType::Unknown);
};
EXPECT_EQ(OSType::Windows, Translate(llvm::StringRef("WIND\0WS", 7)));
EXPECT_EQ(OSType::Windows, Translate("WIN32"));
EXPECT_EQ(OSType::Windows, Translate("WINNT"));
EXPECT_EQ(OSType::Linux, Translate("LINUX"));
EXPECT_EQ(OSType::Linux, Translate("UNIX"));
EXPECT_EQ(OSType::Linux, Translate("*NIX"));
EXPECT_EQ(OSType::Linux, Translate("POSIX"));
EXPECT_EQ(OSType::Windows, Translate(llvm::StringRef("wind\0ws", 7)));
EXPECT_EQ(OSType::Linux, Translate("linux"));
EXPECT_EQ(OSType::Unknown, Translate("wind"));
EXPECT_EQ(OSType::Unknown, Translate(""));
}