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annotate dep/fmt/test/gtest-extra.h @ 360:6ca952f6a95c

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CI/linux: need desktop-file-utils package
author Paper <paper@paper.us.eu.org>
date Mon, 15 Jul 2024 01:09:52 -0400
parents 1faa72660932
children
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1 // Formatting library for C++ - custom Google Test assertions
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2 //
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3 // Copyright (c) 2012 - present, Victor Zverovich
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4 // All rights reserved.
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5 //
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6 // For the license information refer to format.h.
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7
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8 #ifndef FMT_GTEST_EXTRA_H_
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9 #define FMT_GTEST_EXTRA_H_
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10
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11 #include <stdlib.h> // _invalid_parameter_handler
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12
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13 #include <string>
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14
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15 #include "fmt/os.h"
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16 #include "gmock/gmock.h"
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17
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18 #define FMT_TEST_THROW_(statement, expected_exception, expected_message, fail) \
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19 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
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20 if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
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21 std::string gtest_expected_message = expected_message; \
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22 bool gtest_caught_expected = false; \
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23 try { \
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24 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
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25 } catch (expected_exception const& e) { \
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26 if (gtest_expected_message != e.what()) { \
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27 gtest_ar << #statement \
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28 " throws an exception with a different message.\n" \
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29 << "Expected: " << gtest_expected_message << "\n" \
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30 << " Actual: " << e.what(); \
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31 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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32 } \
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33 gtest_caught_expected = true; \
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34 } catch (...) { \
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35 gtest_ar << "Expected: " #statement \
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36 " throws an exception of type " #expected_exception \
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37 ".\n Actual: it throws a different type."; \
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38 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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39 } \
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40 if (!gtest_caught_expected) { \
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41 gtest_ar << "Expected: " #statement \
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42 " throws an exception of type " #expected_exception \
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43 ".\n Actual: it throws nothing."; \
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44 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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45 } \
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46 } else \
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47 GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__) \
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48 : fail(gtest_ar.failure_message())
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49
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50 // Tests that the statement throws the expected exception and the exception's
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51 // what() method returns expected message.
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52 #define EXPECT_THROW_MSG(statement, expected_exception, expected_message) \
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53 FMT_TEST_THROW_(statement, expected_exception, expected_message, \
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54 GTEST_NONFATAL_FAILURE_)
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55
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56 inline std::string system_error_message(int error_code,
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57 const std::string& message) {
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58 auto ec = std::error_code(error_code, std::generic_category());
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59 return std::system_error(ec, message).what();
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60 }
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61
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62 #define EXPECT_SYSTEM_ERROR(statement, error_code, message) \
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63 EXPECT_THROW_MSG(statement, std::system_error, \
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64 system_error_message(error_code, message))
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65
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66 #if FMT_USE_FCNTL
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67
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68 // Captures file output by redirecting it to a pipe.
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69 // The output it can handle is limited by the pipe capacity.
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70 class output_redirect {
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71 private:
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72 FILE* file_;
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73 fmt::file original_; // Original file passed to redirector.
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74 fmt::file read_end_; // Read end of the pipe where the output is redirected.
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75
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76 void flush();
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77 void restore();
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78
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79 public:
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80 explicit output_redirect(FILE* file, bool flush = true);
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81 ~output_redirect() noexcept;
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82
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83 output_redirect(const output_redirect&) = delete;
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84 void operator=(const output_redirect&) = delete;
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85
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86 // Restores the original file, reads output from the pipe into a string
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87 // and returns it.
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88 std::string restore_and_read();
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89 };
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90
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91 # define FMT_TEST_WRITE_(statement, expected_output, file, fail) \
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92 GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
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93 if (::testing::AssertionResult gtest_ar = ::testing::AssertionSuccess()) { \
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94 std::string gtest_expected_output = expected_output; \
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95 output_redirect gtest_redir(file); \
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96 GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
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97 std::string gtest_output = gtest_redir.restore_and_read(); \
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98 if (gtest_output != gtest_expected_output) { \
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99 gtest_ar << #statement " produces different output.\n" \
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100 << "Expected: " << gtest_expected_output << "\n" \
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101 << " Actual: " << gtest_output; \
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102 goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
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103 } \
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104 } else \
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105 GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__) \
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106 : fail(gtest_ar.failure_message())
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107
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108 // Tests that the statement writes the expected output to file.
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109 # define EXPECT_WRITE(file, statement, expected_output) \
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110 FMT_TEST_WRITE_(statement, expected_output, file, GTEST_NONFATAL_FAILURE_)
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111
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112 # ifdef _MSC_VER
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113
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114 // Suppresses Windows assertions on invalid file descriptors, making
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115 // POSIX functions return proper error codes instead of crashing on Windows.
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116 class suppress_assert {
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117 private:
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118 _invalid_parameter_handler original_handler_;
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119 int original_report_mode_;
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120
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121 static void handle_invalid_parameter(const wchar_t*, const wchar_t*,
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122 const wchar_t*, unsigned, uintptr_t) {}
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123
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124 public:
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125 suppress_assert()
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126 : original_handler_(
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127 _set_invalid_parameter_handler(handle_invalid_parameter)),
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128 original_report_mode_(_CrtSetReportMode(_CRT_ASSERT, 0)) {}
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129 ~suppress_assert() {
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130 _set_invalid_parameter_handler(original_handler_);
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131 _CrtSetReportMode(_CRT_ASSERT, original_report_mode_);
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132 (void)original_report_mode_;
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133 }
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134 };
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135
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136 # define SUPPRESS_ASSERT(statement) \
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137 { \
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138 suppress_assert sa; \
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139 statement; \
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140 }
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141 # else
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142 # define SUPPRESS_ASSERT(statement) statement
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143 # endif // _MSC_VER
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144
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145 # define EXPECT_SYSTEM_ERROR_NOASSERT(statement, error_code, message) \
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146 EXPECT_SYSTEM_ERROR(SUPPRESS_ASSERT(statement), error_code, message)
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147
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148 // Attempts to read count characters from a file.
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149 std::string read(fmt::file& f, size_t count);
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150
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151 # define EXPECT_READ(file, expected_content) \
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152 EXPECT_EQ(expected_content, \
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153 read(file, fmt::string_view(expected_content).size()))
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154
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155 #else
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156 # define EXPECT_WRITE(file, statement, expected_output) \
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157 do { \
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158 (void)(file); \
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159 (void)(statement); \
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160 (void)(expected_output); \
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161 SUCCEED(); \
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162 } while (false)
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163 #endif // FMT_USE_FCNTL
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164
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165 #endif // FMT_GTEST_EXTRA_H_