1 /* Unit testing for outcomes 2 (C) 2013-2020 Niall Douglas <http://www.nedproductions.biz/> (4 commits) 3 4 5 Boost Software License - Version 1.0 - August 17th, 2003 6 7 Permission is hereby granted, free of charge, to any person or organization 8 obtaining a copy of the software and accompanying documentation covered by 9 this license (the "Software") to use, reproduce, display, distribute, 10 execute, and transmit the Software, and to prepare derivative works of the 11 Software, and to permit third-parties to whom the Software is furnished to 12 do so, all subject to the following: 13 14 The copyright notices in the Software and this entire statement, including 15 the above license grant, this restriction and the following disclaimer, 16 must be included in all copies of the Software, in whole or in part, and 17 all derivative works of the Software, unless such copies or derivative 18 works are solely in the form of machine-executable object code generated by 19 a source language processor. 20 21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT 24 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE 25 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, 26 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 27 DEALINGS IN THE SOFTWARE. 28 */ 29 30 #include <boost/outcome/experimental/status_outcome.hpp> 31 32 #define BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND std 33 template <class T, class S = BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE::system_code, class P = BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::exception_ptr> using outcome = BOOST_OUTCOME_V2_NAMESPACE::experimental::status_outcome<T, S, P>; 34 using BOOST_OUTCOME_V2_NAMESPACE::in_place_type; 35 36 #include <boost/test/unit_test.hpp> 37 #include <boost/test/unit_test_monitor.hpp> 38 39 #include <iostream> 40 41 #ifdef _MSC_VER 42 #pragma warning(disable : 4702) // unreachable code 43 #endif 44 45 BOOST_OUTCOME_AUTO_TEST_CASE(works_status_code_outcome, "Tests that the outcome with status_code works as intended") 46 { 47 using namespace BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE; 48 49 { // errored int 50 outcome<int> m(generic_code{errc::bad_address}); 51 BOOST_CHECK(!m); 52 BOOST_CHECK(!m.has_value()); 53 BOOST_CHECK(m.has_error()); 54 BOOST_CHECK(!m.has_exception()); 55 BOOST_CHECK_THROW(m.value(), status_error<void>); 56 BOOST_CHECK_NO_THROW(m.error()); 57 BOOST_CHECK_THROW(BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::rethrow_exception(m.failure()), generic_error); 58 } 59 { // errored void 60 outcome<void> m(generic_code{errc::bad_address}); 61 BOOST_CHECK(!m); 62 BOOST_CHECK(!m.has_value()); 63 BOOST_CHECK(m.has_error()); 64 BOOST_CHECK(!m.has_exception()); __anon1ecb3a5c0102() 65 BOOST_CHECK_THROW(([&m]() -> void { return m.value(); }()), generic_error); 66 BOOST_CHECK_NO_THROW(m.error()); 67 BOOST_CHECK_THROW(BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::rethrow_exception(m.failure()), generic_error); 68 } 69 { // valued int 70 outcome<int> m(5); 71 BOOST_CHECK(m); 72 BOOST_CHECK(m.has_value()); 73 BOOST_CHECK(!m.has_error()); 74 BOOST_CHECK(!m.has_exception()); 75 BOOST_CHECK(m.value() == 5); 76 m.value() = 6; 77 BOOST_CHECK(m.value() == 6); 78 BOOST_CHECK(!m.failure()); 79 } 80 { // moves do not clear state 81 outcome<std::string> m("niall"); 82 BOOST_CHECK(m); 83 BOOST_CHECK(m.has_value()); 84 BOOST_CHECK(!m.has_error()); 85 BOOST_CHECK(!m.has_exception()); 86 BOOST_CHECK(m.value() == "niall"); 87 m.value() = "NIALL"; 88 BOOST_CHECK(m.value() == "NIALL"); 89 auto temp(std::move(m).value()); 90 BOOST_CHECK(temp == "NIALL"); 91 BOOST_CHECK(m.value().empty()); // NOLINT 92 } 93 { // valued void 94 outcome<void> m(in_place_type<void>); 95 BOOST_CHECK(m); 96 BOOST_CHECK(m.has_value()); 97 BOOST_CHECK(!m.has_error()); 98 BOOST_CHECK(!m.has_exception()); 99 BOOST_CHECK_NO_THROW(m.value()); // works, but type returned is unusable 100 BOOST_CHECK(!m.failure()); 101 } 102 { // errored 103 error ec(errc::no_link); 104 outcome<int> m(ec.clone()); 105 BOOST_CHECK(!m); 106 BOOST_CHECK(!m.has_value()); 107 BOOST_CHECK(m.has_error()); 108 BOOST_CHECK(!m.has_exception()); 109 BOOST_CHECK_THROW(m.value(), generic_error); 110 BOOST_CHECK(m.error() == ec); 111 #ifndef BOOST_NO_EXCEPTIONS 112 BOOST_CHECK(m.failure()); 113 try 114 { 115 BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::rethrow_exception(m.failure()); 116 } 117 catch(const generic_error &ex) 118 { 119 BOOST_CHECK(ex.code() == ec); 120 BOOST_CHECK(ex.code().value() == errc::no_link); 121 } 122 #endif 123 } 124 #if !defined(__APPLE__) || defined(__cpp_exceptions) 125 { // excepted 126 BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::error_code ec(5, BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_category()); 127 auto e = BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::make_exception_ptr(BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_error(ec)); // NOLINT 128 outcome<int> m(e); 129 BOOST_CHECK(!m); 130 BOOST_CHECK(!m.has_value()); 131 BOOST_CHECK(!m.has_error()); 132 BOOST_CHECK(m.has_exception()); 133 BOOST_CHECK_THROW(m.value(), BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_error); 134 BOOST_CHECK(m.exception() == e); 135 #ifndef BOOST_NO_EXCEPTIONS 136 BOOST_CHECK(m.failure()); 137 try 138 { 139 BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::rethrow_exception(m.failure()); 140 } 141 catch(const BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_error &ex) 142 { 143 BOOST_CHECK(ex.code() == ec); 144 BOOST_CHECK(ex.code().value() == 5); 145 } 146 #endif 147 } 148 { // custom error type 149 struct Foo 150 { 151 }; 152 auto e = BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::make_exception_ptr(Foo()); 153 outcome<int> m(e); 154 BOOST_CHECK(!m); 155 BOOST_CHECK(!m.has_value()); 156 BOOST_CHECK(!m.has_error()); 157 BOOST_CHECK(m.has_exception()); 158 BOOST_CHECK_THROW(m.value(), Foo); 159 BOOST_CHECK(m.exception() == e); 160 } 161 { // outcome<void, void> should work 162 BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::error_code ec(5, BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_category()); 163 auto e = BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::make_exception_ptr(BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::system_error(ec)); 164 outcome<void, void> m(e); 165 BOOST_CHECK(!m); 166 BOOST_CHECK(!m.has_value()); 167 BOOST_CHECK(!m.has_error()); 168 BOOST_CHECK(m.has_exception()); 169 } 170 #endif 171 172 173 { 174 outcome<int> a(5); 175 outcome<int> b(generic_code{errc::invalid_argument}); 176 std::cout << sizeof(a) << std::endl; // 40 bytes 177 a.assume_value(); 178 b.assume_error(); 179 #ifndef BOOST_NO_EXCEPTIONS 180 try 181 { 182 b.value(); 183 std::cerr << "fail" << std::endl; 184 std::terminate(); 185 } 186 catch(const generic_error & /*unused*/) 187 { 188 } 189 #endif 190 static_assert(!std::is_default_constructible<decltype(a)>::value, ""); 191 static_assert(!std::is_nothrow_default_constructible<decltype(a)>::value, ""); 192 static_assert(!std::is_copy_constructible<decltype(a)>::value, ""); 193 static_assert(!std::is_trivially_copy_constructible<decltype(a)>::value, ""); 194 static_assert(!std::is_nothrow_copy_constructible<decltype(a)>::value, ""); 195 static_assert(!std::is_copy_assignable<decltype(a)>::value, ""); 196 static_assert(!std::is_trivially_copy_assignable<decltype(a)>::value, ""); 197 static_assert(!std::is_nothrow_copy_assignable<decltype(a)>::value, ""); 198 static_assert(!std::is_trivially_destructible<decltype(a)>::value, ""); 199 static_assert(std::is_nothrow_destructible<decltype(a)>::value, ""); 200 201 // Test void compiles 202 outcome<void> c(in_place_type<void>); 203 // Test int, void compiles 204 outcome<int, void> d(in_place_type<BOOST_OUTCOME_PREVENT_CONVERSION_WORKAROUND::exception_ptr>); 205 } 206 207 { 208 // Can only be constructed via multiple args 209 struct udt3 210 { 211 udt3() = delete; 212 udt3(udt3 &&) = delete; 213 udt3(const udt3 &) = delete; 214 udt3 &operator=(udt3 &&) = delete; 215 udt3 &operator=(const udt3 &) = delete; udt3udt3216 explicit udt3(int /*unused*/, const char * /*unused*/, std::nullptr_t /*unused*/) {} 217 ~udt3() = default; 218 }; 219 // Test a udt which can only be constructed in place compiles 220 outcome<udt3> g(in_place_type<udt3>, 5, static_cast<const char *>("niall"), nullptr); 221 // Does converting inplace construction also work? 222 outcome<udt3> h(5, static_cast<const char *>("niall"), nullptr); 223 BOOST_CHECK(h.has_value()); 224 } 225 } 226