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#include "cata_catch.h"
#include <memory>
#include "safe_reference.h"
struct example {
safe_reference_anchor anchor;
safe_reference<example> get_ref() {
return anchor.reference_to( this );
}
};
TEST_CASE( "safe_reference_returns_correct_object", "[safe_reference]" )
{
example e;
safe_reference<example> ref = e.get_ref();
CHECK( ref );
CHECK( ref.get() == &e );
}
TEST_CASE( "safe_reference_invalidated_by_destructor", "[safe_reference]" )
{
std::unique_ptr<example> e = std::make_unique<example>();
safe_reference<example> ref = e->get_ref();
e.reset();
CHECK( !ref );
CHECK( ref.get() == nullptr );
}
TEST_CASE( "safe_reference_invalidated_by_assignment", "[safe_reference]" )
{
example e;
safe_reference<example> ref = e.get_ref();
e = example();
CHECK( !ref );
CHECK( ref.get() == nullptr );
}
TEST_CASE( "safe_reference_not_shared_by_copy", "[safe_reference]" )
{
std::unique_ptr<example> e0 = std::make_unique<example>();
safe_reference<example> ref0 = e0->get_ref();
std::unique_ptr<example> e1 = std::make_unique<example>( *e0 );
safe_reference<example> ref1 = e1->get_ref();
CHECK( ref0 );
CHECK( ref1 );
CHECK( ref0.get() != ref1.get() );
e0.reset();
CHECK( !ref0 );
CHECK( ref1 );
}
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