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Diffstat (limited to 'src/tests/common/unique_function.cpp')
-rw-r--r-- | src/tests/common/unique_function.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/tests/common/unique_function.cpp b/src/tests/common/unique_function.cpp new file mode 100644 index 000000000..ac9912738 --- /dev/null +++ b/src/tests/common/unique_function.cpp @@ -0,0 +1,108 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <string> + +#include <catch2/catch.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"; + } + Noisy(const Noisy&) : state{"Copied constructed"} {} + Noisy& operator=(const Noisy&) { + state = "Copied assigned"; + } + + 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 = std::move(noisy)] { + REQUIRE(noisy.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 = std::move(object)] {}; + REQUIRE(num_destroyed == 0); + } + REQUIRE(num_destroyed == 1); + } +} |