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// 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
// Fixture.cpp
// Catch2 has three ways to express fixtures:
// - Sections
// - Traditional class-based fixtures that are created and destroyed on every
// partial run
// - Traditional class-based fixtures that are created at the start of a test
// case and destroyed at the end of a test case (this file)
// main() provided by linkage to Catch2WithMain
#include <catch2/catch_test_macros.hpp>
#include <thread>
class ClassWithExpensiveSetup {
public:
ClassWithExpensiveSetup() {
// Imagine some really expensive set up here.
// e.g.
// setting up a D3D12/Vulkan Device,
// connecting to a database,
// loading a file
// etc etc etc
std::this_thread::sleep_for( std::chrono::seconds( 2 ) );
}
~ClassWithExpensiveSetup() noexcept {
// We can do any clean up of the expensive class in the destructor
// e.g.
// destroy D3D12/Vulkan Device,
// disconnecting from a database,
// release file handle
// etc etc etc
std::this_thread::sleep_for( std::chrono::seconds( 1 ) );
}
int getInt() const { return 42; }
};
struct MyFixture {
// The test case member function is const.
// Therefore we need to mark any member of the fixture
// that needs to mutate as mutable.
mutable int myInt = 0;
ClassWithExpensiveSetup expensive;
};
// Only one object of type MyFixture will be instantiated for the run
// of this test case even though there are two leaf sections.
// This is useful if your test case requires an object that is
// expensive to create and could be reused for each partial run of the
// test case.
TEST_CASE_PERSISTENT_FIXTURE( MyFixture, "Tests with MyFixture" ) {
const int val = myInt++;
SECTION( "First partial run" ) {
const auto otherValue = expensive.getInt();
REQUIRE( val == 0 );
REQUIRE( otherValue == 42 );
}
SECTION( "Second partial run" ) { REQUIRE( val == 1 ); }
}
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