mirror of https://github.com/catchorg/Catch2.git
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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// Fixture.cpp
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// Catch2 has three ways to express fixtures:
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// - Sections
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// - Traditional class-based fixtures that are created and destroyed on every
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// partial run
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// - Traditional class-based fixtures that are created at the start of a test
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// case and destroyed at the end of a test case (this file)
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// main() provided by linkage to Catch2WithMain
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#include <catch2/catch_test_macros.hpp>
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#include <thread>
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class ClassWithExpensiveSetup {
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public:
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ClassWithExpensiveSetup() {
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// Imagine some really expensive set up here.
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// e.g.
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// setting up a D3D12/Vulkan Device,
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// connecting to a database,
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// loading a file
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// etc etc etc
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std::this_thread::sleep_for( std::chrono::seconds( 2 ) );
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}
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~ClassWithExpensiveSetup() noexcept {
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// We can do any clean up of the expensive class in the destructor
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// e.g.
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// destroy D3D12/Vulkan Device,
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// disconnecting from a database,
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// release file handle
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// etc etc etc
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std::this_thread::sleep_for( std::chrono::seconds( 1 ) );
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}
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int getInt() const { return 42; }
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};
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struct MyFixture {
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// The test case member function is const.
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// Therefore we need to mark any member of the fixture
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// that needs to mutate as mutable.
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mutable int myInt = 0;
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ClassWithExpensiveSetup expensive;
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};
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// Only one object of type MyFixture will be instantiated for the run
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// of this test case even though there are two leaf sections.
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// This is useful if your test case requires an object that is
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// expensive to create and could be reused for each partial run of the
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// test case.
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TEST_CASE_PERSISTENT_FIXTURE( MyFixture, "Tests with MyFixture" ) {
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const int val = myInt++;
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SECTION( "First partial run" ) {
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const auto otherValue = expensive.getInt();
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REQUIRE( val == 0 );
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REQUIRE( otherValue == 42 );
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}
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SECTION( "Second partial run" ) { REQUIRE( val == 1 ); }
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}
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