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annotate unittests/ADT/VariadicFunctionTest.cpp @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 803732b1fca8
children
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1 //===----------- VariadicFunctionTest.cpp - VariadicFunction unit tests ---===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "llvm/ADT/VariadicFunction.h"
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10 #include "llvm/ADT/ArrayRef.h"
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11 #include "gtest/gtest.h"
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12
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13 using namespace llvm;
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14 namespace {
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15
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16 // Defines a variadic function StringCat() to join strings.
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17 // StringCat()'s arguments and return value have class types.
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18 std::string StringCatImpl(ArrayRef<const std::string *> Args) {
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19 std::string S;
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20 for (unsigned i = 0, e = Args.size(); i < e; ++i)
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21 S += *Args[i];
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22 return S;
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23 }
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24 const VariadicFunction<std::string, std::string, StringCatImpl> StringCat = {};
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25
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26 TEST(VariadicFunctionTest, WorksForClassTypes) {
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27 EXPECT_EQ("", StringCat());
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28 EXPECT_EQ("a", StringCat("a"));
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29 EXPECT_EQ("abc", StringCat("a", "bc"));
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30 EXPECT_EQ("0123456789abcdefghijklmnopqrstuv",
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31 StringCat("0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
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32 "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
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33 "k", "l", "m", "n", "o", "p", "q", "r", "s", "t",
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34 "u", "v"));
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35 }
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36
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37 // Defines a variadic function Sum(), whose arguments and return value
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38 // have primitive types.
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39 // The return type of SumImp() is deliberately different from its
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40 // argument type, as we want to test that this works.
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41 long SumImpl(ArrayRef<const int *> Args) {
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42 long Result = 0;
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43 for (unsigned i = 0, e = Args.size(); i < e; ++i)
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44 Result += *Args[i];
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45 return Result;
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46 }
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47 const VariadicFunction<long, int, SumImpl> Sum = {};
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48
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49 TEST(VariadicFunctionTest, WorksForPrimitiveTypes) {
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50 EXPECT_EQ(0, Sum());
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51 EXPECT_EQ(1, Sum(1));
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52 EXPECT_EQ(12, Sum(10, 2));
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53 EXPECT_EQ(1234567, Sum(1000000, 200000, 30000, 4000, 500, 60, 7));
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54 }
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55
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56 // Appends an array of strings to dest and returns the number of
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57 // characters appended.
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58 int StringAppendImpl(std::string *Dest, ArrayRef<const std::string *> Args) {
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59 int Chars = 0;
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60 for (unsigned i = 0, e = Args.size(); i < e; ++i) {
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61 Chars += Args[i]->size();
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62 *Dest += *Args[i];
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63 }
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64 return Chars;
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65 }
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66 const VariadicFunction1<int, std::string *, std::string,
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67 StringAppendImpl> StringAppend = {};
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68
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69 TEST(VariadicFunction1Test, Works) {
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70 std::string S0("hi");
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71 EXPECT_EQ(0, StringAppend(&S0));
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72 EXPECT_EQ("hi", S0);
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73
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74 std::string S1("bin");
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75 EXPECT_EQ(2, StringAppend(&S1, "go"));
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76 EXPECT_EQ("bingo", S1);
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77
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78 std::string S4("Fab4");
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79 EXPECT_EQ(4 + 4 + 6 + 5,
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80 StringAppend(&S4, "John", "Paul", "George", "Ringo"));
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81 EXPECT_EQ("Fab4JohnPaulGeorgeRingo", S4);
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82 }
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83
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84 // Counts how many optional arguments fall in the given range.
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85 // Returns the result in *num_in_range. We make the return type void
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86 // as we want to test that VariadicFunction* can handle it.
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87 void CountInRangeImpl(int *NumInRange, int Low, int High,
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88 ArrayRef<const int *> Args) {
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89 *NumInRange = 0;
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90 for (unsigned i = 0, e = Args.size(); i < e; ++i)
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91 if (Low <= *Args[i] && *Args[i] <= High)
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92 ++(*NumInRange);
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93 }
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94 const VariadicFunction3<void, int *, int, int, int,
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95 CountInRangeImpl> CountInRange = {};
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96
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97 TEST(VariadicFunction3Test, Works) {
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98 int N = -1;
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99 CountInRange(&N, -100, 100);
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100 EXPECT_EQ(0, N);
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101
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102 CountInRange(&N, -100, 100, 42);
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103 EXPECT_EQ(1, N);
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104
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105 CountInRange(&N, -100, 100, 1, 999, -200, 42);
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106 EXPECT_EQ(2, N);
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107 }
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108
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109 } // namespace