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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#include "../catch.hpp"
#include "rkcommon/utility/Optional.h"
using rkcommon::utility::Optional;
// Helper functions ///////////////////////////////////////////////////////////
template <typename T>
inline void verify_no_value(const Optional<T> &opt)
{
// Implicitly tests 'operator bool()' and 'has_value()' functions
REQUIRE(!opt);
REQUIRE(!opt.has_value());
}
template <typename T>
inline void verify_value(const Optional<T> &opt, const T &value)
{
// Implicitly tests 'operator bool()', 'has_value()', and 'operator*()'
REQUIRE(opt);
REQUIRE(opt.has_value());
REQUIRE(opt.value() == value);
REQUIRE(*opt == value);
}
// Tests //////////////////////////////////////////////////////////////////////
SCENARIO("Optional<> construction", "[Optional]")
{
GIVEN("A default constructed Optional<>")
{
Optional<int> default_opt;
THEN("The Optional<> should not have a value")
{
verify_no_value(default_opt);
}
WHEN("Used to copy construct from an Optional<> without a value")
{
Optional<int> copy_opt(default_opt);
THEN("The new Optional<> should also not have a value")
{
verify_no_value(copy_opt);
}
}
WHEN("Used to move construct from Optional<> without value")
{
Optional<int> copy_opt(std::move(default_opt));
THEN("The new Optional<> should also not have a value")
{
verify_no_value(copy_opt);
}
}
WHEN("Assigned a value with operator=()")
{
default_opt = 5;
THEN("The Optional<> should take on the new value")
{
verify_value(default_opt, 5);
}
}
}
GIVEN("An Optional<> constructed with a value")
{
Optional<int> value_opt(5);
THEN("The stored value should match the value passed on construction")
{
verify_value(value_opt, 5);
}
WHEN("Used to copy construct from an Optional<> with a value")
{
Optional<int> copy_opt(value_opt);
THEN("The new Optional<> should have the same value")
{
verify_value(copy_opt, 5);
}
}
WHEN("Used to copy construct from Optional<> with value and different type")
{
Optional<float> copy_opt(value_opt);
THEN("The new Optional<> should have the right value")
{
verify_value(copy_opt, 5.f);
}
}
WHEN("Used to move construct from Optional<> with value")
{
Optional<int> value_opt(5);
Optional<int> copy_opt(std::move(value_opt));
THEN("The new Optional<> should have the same value")
{
verify_value(copy_opt, 5);
}
}
WHEN("Used to move construct from Optional<> with value and different type")
{
Optional<int> value_opt(5);
Optional<float> copy_opt(std::move(value_opt));
THEN("The new Optional<> should have the right value")
{
verify_value(copy_opt, 5.f);
}
}
}
}
TEST_CASE("Optional<>::operator=(Optional<>)", "[Optional]")
{
Optional<int> opt;
opt = 5;
Optional<int> otherOpt = opt;
verify_value(otherOpt, 5);
Optional<float> movedFromOpt;
movedFromOpt = std::move(opt);
verify_value(movedFromOpt, 5.f);
}
SCENARIO("Optional<>::value_or()", "[Optional]")
{
Optional<int> opt;
SECTION("Use default value in 'value_or()' if no value is present")
{
REQUIRE(opt.value_or(10) == 10);
}
SECTION("Use correct value in 'value_or()' if value is present")
{
opt = 5;
REQUIRE(opt.value_or(10) == 5);
}
}
TEST_CASE("Optional<>::reset()", "[Optional]")
{
Optional<int> opt(5);
opt.reset();
verify_no_value(opt);
}
TEST_CASE("Optional<>::emplace()", "[Optional]")
{
Optional<int> opt;
opt.emplace(5);
verify_value(opt, 5);
}
TEST_CASE("logical operators", "[Optional]")
{
Optional<int> opt1(5);
SECTION("operator==()")
{
Optional<int> opt2(5);
REQUIRE(opt1 == opt2);
}
SECTION("operator!=()")
{
Optional<int> opt2(1);
REQUIRE(opt1 != opt2);
}
SECTION("operator<()")
{
Optional<int> opt2(1);
REQUIRE(opt2 < opt1);
}
SECTION("operator<=()")
{
Optional<int> opt2(5);
REQUIRE(opt2 <= opt1);
Optional<int> opt3(4);
REQUIRE(opt3 <= opt2);
}
SECTION("operator>()")
{
Optional<int> opt2(1);
REQUIRE(opt1 > opt2);
}
SECTION("operator>=()")
{
Optional<int> opt2(5);
REQUIRE(opt1 >= opt2);
Optional<int> opt3(4);
REQUIRE(opt2 >= opt3);
}
}
TEST_CASE("make_optional<>()", "[Optional]")
{
Optional<int> opt1(5);
auto opt2 = rkcommon::utility::make_optional<int>(5);
REQUIRE(opt1 == opt2);
}
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