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86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
/* See the end of this file for copyright and license terms. */
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#include <catch2/catch.hpp>
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#include <errno.h>
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#include <neo.h>
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/*
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* nref_init uses offsetof internally to be able to cast the nref_t field out
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* to the containing structure which is then passed to the destroy callback if
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* the refcount reached zero. Neither gcc nor Clang seem to like using offsetof
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* in certain structures containing fields only valid in C++, and since libneo
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* is specifically meant to be used in plain C code anyway we just declare the
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* test structure as extern to make sure we actually test the behavior of the C
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* code rather than the fun quirks C++ is infamous for.
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*/
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extern "C" struct nref_test {
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bool *called;
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/* NREF_FIELD is not at the beginning to ensure offsets are subtracted */
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NREF_FIELD;
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};
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void test_destroy(struct nref_test *ptr)
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{
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*ptr->called = true;
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delete ptr;
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}
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SCENARIO( "nref: call destroy callback when count reaches 0", "[src/nref.c]" )
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{
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GIVEN( "structure is initialized" )
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{
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bool called = false;
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struct nref_test *instance = new nref_test();
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instance->called = &called;
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nref_init(instance, test_destroy);
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REQUIRE( !called );
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WHEN( "nget is called" )
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{
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nget(instance);
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THEN( "destroy is not called" )
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{
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REQUIRE( !called );
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}
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}
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WHEN( "nput is called" )
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{
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nput(instance);
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THEN( "destroy is called" )
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{
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REQUIRE( instance == nil );
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}
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}
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WHEN( "nget is called, then nput is called twice" )
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{
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nget(instance);
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nput(instance);
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nput(instance);
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THEN( "destroy is called" )
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{
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REQUIRE( called );
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}
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}
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}
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}
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/*
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* This file is part of libneo.
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* Copyright (c) 2021 Fefie <owo@fef.moe>.
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*
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* libneo is non-violent software: you may only use, redistribute,
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* and/or modify it under the terms of the CNPLv6+ as found in
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* the LICENSE file in the source code root directory or at
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* <https://git.pixie.town/thufie/CNPL>.
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*
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* libneo comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPLv6+ for details.
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*/
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