52 lines
1.8 KiB
C++
52 lines
1.8 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
|
|
|
|
// 311-Gen-CustomCapture.cpp
|
|
// Shows how to provide custom capture list to the generator expression
|
|
|
|
// 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. Also, even if you know what you are
|
|
// doing, you should probably use GENERATE_COPY or GENERATE_REF macros
|
|
// instead. However, if your use case requires having a
|
|
// per-variable custom capture list, this example shows how to achieve
|
|
// that.
|
|
|
|
#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 r1 = GENERATE(table<double, double>({
|
|
record{3, 4},
|
|
record{-4, -3},
|
|
record{10, 1000}
|
|
}));
|
|
|
|
auto r2(r1);
|
|
|
|
// This will take r1 by reference and r2 by value.
|
|
// Note that there are no advantages for doing so in this example,
|
|
// it is done only for expository purposes.
|
|
auto number = Catch::Generators::generate( "custom capture generator", CATCH_INTERNAL_LINEINFO,
|
|
[&r1, r2]{
|
|
using namespace Catch::Generators;
|
|
return makeGenerators(take(50, random(std::get<0>(r1), std::get<1>(r2))));
|
|
}
|
|
);
|
|
|
|
REQUIRE(std::abs(number) > 0);
|
|
}
|
|
|
|
// Compiling and running this file will result in 150 successful assertions
|
|
|