43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
|
|
// Copyright Catch2 Authors
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See accompanying file LICENSE.txt or copy at
|
|
// https://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
|
|
// 310-Gen-VariablesInGenerator.cpp
|
|
// Shows how to use variables when creating generators.
|
|
|
|
// Note that using variables inside generators is dangerous and should
|
|
// be done only if you know what you are doing, because the generators
|
|
// _WILL_ outlive the variables -- thus they should be either captured
|
|
// by value directly, or copied by the generators during construction.
|
|
|
|
#include <catch2/catch_test_macros.hpp>
|
|
#include <catch2/generators/catch_generators_adapters.hpp>
|
|
#include <catch2/generators/catch_generators_random.hpp>
|
|
|
|
TEST_CASE("Generate random doubles across different ranges",
|
|
"[generator][example][advanced]") {
|
|
// Workaround for old libstdc++
|
|
using record = std::tuple<double, double>;
|
|
// Set up 3 ranges to generate numbers from
|
|
auto r = GENERATE(table<double, double>({
|
|
record{3, 4},
|
|
record{-4, -3},
|
|
record{10, 1000}
|
|
}));
|
|
|
|
// This will not compile (intentionally), because it accesses a variable
|
|
// auto number = GENERATE(take(50, random(std::get<0>(r), std::get<1>(r))));
|
|
|
|
// GENERATE_COPY copies all variables mentioned inside the expression
|
|
// thus this will work.
|
|
auto number = GENERATE_COPY(take(50, random(std::get<0>(r), std::get<1>(r))));
|
|
|
|
REQUIRE(std::abs(number) > 0);
|
|
}
|
|
|
|
// Compiling and running this file will result in 150 successful assertions
|
|
|