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#include "catch.hpp"
#include <mapbox/optional.hpp>
struct dummy
{
dummy(int _m_1, int _m_2) : m_1(_m_1), m_2(_m_2) {}
int m_1;
int m_2;
};
TEST_CASE("optional can be instantiated with a POD type", "[optional]")
{
mapbox::util::optional<int> dbl_opt;
REQUIRE(!dbl_opt);
dbl_opt = 3;
REQUIRE(dbl_opt);
REQUIRE(dbl_opt.get() == 3);
REQUIRE(*dbl_opt == 3);
}
TEST_CASE("copy c'tor", "[optional]")
{
mapbox::util::optional<int> dbl_opt;
REQUIRE(!dbl_opt);
dbl_opt = 3;
REQUIRE(dbl_opt);
mapbox::util::optional<int> other = dbl_opt;
REQUIRE(other.get() == 3);
REQUIRE(*other == 3);
}
TEST_CASE("const operator*, const get()", "[optional]")
{
const mapbox::util::optional<int> dbl_opt = 3;
REQUIRE(dbl_opt);
auto pi1 = dbl_opt.get();
auto pi2 = *dbl_opt;
REQUIRE(pi1 == 3);
REQUIRE(pi2 == 3);
}
TEST_CASE("non-const operator*, non-const get()", "[optional]")
{
mapbox::util::optional<int> dbl_opt = 3;
REQUIRE(dbl_opt);
auto pi1 = dbl_opt.get();
auto pi2 = *dbl_opt;
REQUIRE(pi1 == 3);
REQUIRE(pi2 == 3);
}
TEST_CASE("emplace initialization, reset", "[optional]")
{
mapbox::util::optional<dummy> dummy_opt;
REQUIRE(!dummy_opt);
// rvalues, baby!
dummy_opt.emplace(1, 2);
REQUIRE(dummy_opt);
REQUIRE(dummy_opt.get().m_1 == 1);
REQUIRE((*dummy_opt).m_2 == 2);
dummy_opt.reset();
REQUIRE(!dummy_opt);
}
TEST_CASE("assignment", "[optional]")
{
mapbox::util::optional<int> a;
mapbox::util::optional<int> b;
a = 1;
b = 3;
REQUIRE(a.get() == 1);
REQUIRE(b.get() == 3);
b = a;
REQUIRE(a.get() == b.get());
REQUIRE(b.get() == 1);
}
TEST_CASE("self assignment", "[optional]")
{
mapbox::util::optional<int> a;
a = 1;
REQUIRE(a.get() == 1);
#if !defined(__clang__)
a = a;
REQUIRE(a.get() == 1);
#endif
}
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