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#define BOOST_TEST_MODULE LazyPointer
#include <boost/test/unit_test.hpp>
#include "lazyPointer.h"
#include <memory>
#include <string>
using namespace AdHoc;
class Test {
public:
explicit Test(int v) : val(v) { }
const int val;
};
using TestLazyPointer = LazyPointer<Test>;
using RawLazyPointer = LazyPointer<int, int *>;
/// LCOV_EXCL_START (diagnostics)
BOOST_TEST_DONT_PRINT_LOG_VALUE(TestLazyPointer);
BOOST_TEST_DONT_PRINT_LOG_VALUE(RawLazyPointer);
/// LCOV_EXCL_STOP
static TestLazyPointer::pointer_type
factory()
{
return std::make_shared<Test>(3);
}
static TestLazyPointer::pointer_type
paramFactory(const std::string & str)
{
return std::make_shared<Test>(str.length());
}
BOOST_AUTO_TEST_CASE(islazy)
{
TestLazyPointer p([] {
return factory();
});
BOOST_REQUIRE_EQUAL(false, p.hasValue());
Test * t = p.get();
BOOST_REQUIRE(t);
BOOST_REQUIRE(p);
BOOST_REQUIRE_EQUAL(true, p.hasValue());
BOOST_REQUIRE_EQUAL(p, t);
BOOST_REQUIRE_EQUAL(3, t->val);
BOOST_REQUIRE_EQUAL(3, p->val);
}
BOOST_AUTO_TEST_CASE(preinit)
{
Test * t = new Test(4);
TestLazyPointer p(TestLazyPointer::pointer_type {t});
BOOST_REQUIRE_EQUAL(true, p.hasValue());
BOOST_REQUIRE_EQUAL(p, t);
BOOST_REQUIRE_EQUAL(4, p->val);
}
BOOST_AUTO_TEST_CASE(reset)
{
Test * t = new Test(4);
TestLazyPointer p(TestLazyPointer::pointer_type {t});
BOOST_REQUIRE_EQUAL(true, p.hasValue());
BOOST_REQUIRE_EQUAL(4, p->val);
p = nullptr;
BOOST_REQUIRE_EQUAL(true, p.hasValue());
BOOST_REQUIRE_EQUAL(true, !p);
p = [] {
return factory();
};
BOOST_REQUIRE_EQUAL(false, p.hasValue());
BOOST_REQUIRE(p.get());
BOOST_REQUIRE_EQUAL(true, p.hasValue());
BOOST_REQUIRE_EQUAL(3, p->val);
}
BOOST_AUTO_TEST_CASE(nondefault)
{
TestLazyPointer p([] {
return paramFactory("some string");
});
BOOST_REQUIRE_EQUAL(false, p.hasValue());
BOOST_REQUIRE_EQUAL(11, (*p).val);
BOOST_REQUIRE_EQUAL(true, p.hasValue());
}
BOOST_AUTO_TEST_CASE(rawPointerNull)
{
RawLazyPointer null;
BOOST_REQUIRE(null.hasValue());
BOOST_REQUIRE(!null);
BOOST_REQUIRE(!null.get());
}
BOOST_AUTO_TEST_CASE(rawPointerNonNull)
{
RawLazyPointer value(new int(3));
BOOST_REQUIRE(value.hasValue());
BOOST_REQUIRE(value);
BOOST_REQUIRE(value.get());
BOOST_REQUIRE_EQUAL(*value, 3);
int * x = value.operator int *();
BOOST_REQUIRE_EQUAL(*x, 3);
delete x;
}
int *
rawFactory(const std::string & s)
{
return new int(static_cast<int>(s.length()));
}
BOOST_AUTO_TEST_CASE(rawPointerFactory)
{
RawLazyPointer value([] {
return rawFactory(std::string("four"));
});
BOOST_REQUIRE(!value.hasValue());
BOOST_REQUIRE_EQUAL(*value, 4);
BOOST_REQUIRE(value.hasValue());
delete value.operator int *();
}
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