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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <string>
#include <catch2/catch_test_macros.hpp>
#include "common/unique_function.h"
namespace {
struct Noisy {
Noisy() : state{"Default constructed"} {}
Noisy(Noisy&& rhs) noexcept : state{"Move constructed"} {
rhs.state = "Moved away";
}
Noisy& operator=(Noisy&& rhs) noexcept {
state = "Move assigned";
rhs.state = "Moved away";
return *this;
}
Noisy(const Noisy&) : state{"Copied constructed"} {}
Noisy& operator=(const Noisy&) {
state = "Copied assigned";
return *this;
}
std::string state;
};
} // Anonymous namespace
TEST_CASE("UniqueFunction", "[common]") {
SECTION("Capture reference") {
int value = 0;
Common::UniqueFunction<void> func = [&value] { value = 5; };
func();
REQUIRE(value == 5);
}
SECTION("Capture pointer") {
int value = 0;
int* pointer = &value;
Common::UniqueFunction<void> func = [pointer] { *pointer = 5; };
func();
REQUIRE(value == 5);
}
SECTION("Move object") {
Noisy noisy;
REQUIRE(noisy.state == "Default constructed");
Common::UniqueFunction<void> func = [noisy_inner = std::move(noisy)] {
REQUIRE(noisy_inner.state == "Move constructed");
};
REQUIRE(noisy.state == "Moved away");
func();
}
SECTION("Move construct function") {
int value = 0;
Common::UniqueFunction<void> func = [&value] { value = 5; };
Common::UniqueFunction<void> new_func = std::move(func);
new_func();
REQUIRE(value == 5);
}
SECTION("Move assign function") {
int value = 0;
Common::UniqueFunction<void> func = [&value] { value = 5; };
Common::UniqueFunction<void> new_func;
new_func = std::move(func);
new_func();
REQUIRE(value == 5);
}
SECTION("Default construct then assign function") {
int value = 0;
Common::UniqueFunction<void> func;
func = [&value] { value = 5; };
func();
REQUIRE(value == 5);
}
SECTION("Pass arguments") {
int result = 0;
Common::UniqueFunction<void, int, int> func = [&result](int a, int b) { result = a + b; };
func(5, 4);
REQUIRE(result == 9);
}
SECTION("Pass arguments and return value") {
Common::UniqueFunction<int, int, int> func = [](int a, int b) { return a + b; };
REQUIRE(func(5, 4) == 9);
}
SECTION("Destructor") {
int num_destroyed = 0;
struct Foo {
Foo(int* num_) : num{num_} {}
Foo(Foo&& rhs) : num{std::exchange(rhs.num, nullptr)} {}
Foo(const Foo&) = delete;
~Foo() {
if (num) {
++*num;
}
}
int* num = nullptr;
};
Foo object{&num_destroyed};
{
Common::UniqueFunction<void> func = [object_inner = std::move(object)] {};
REQUIRE(num_destroyed == 0);
}
REQUIRE(num_destroyed == 1);
}
}
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