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129 lines
2.8 KiB
C++
129 lines
2.8 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include <catch.hpp>
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#include "base/flags.h"
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namespace MethodNamespace {
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template <typename Enum>
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void TestFlags(Enum a, Enum b, Enum c) {
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auto abc = a | b;
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abc |= c;
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auto test = abc != a;
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CHECK(abc != a);
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CHECK(abc != (a | b));
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CHECK((abc & a) == a);
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CHECK((abc & b) == b);
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CHECK((abc & c) == c);
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CHECK((abc & ~a) == (b | c));
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CHECK((abc & ~(b | c)) == a);
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CHECK((abc ^ a) == (abc & ~a));
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auto another = a | b;
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another |= c;
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CHECK(abc == another);
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another &= ~b;
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CHECK(another == (a | c));
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another ^= a;
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CHECK(another == c);
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another = 0;
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another = nullptr;
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auto is_zero = ((another & abc) == 0);
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CHECK(is_zero);
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CHECK(!(another & abc));
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auto more = a | another;
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auto just = a | 0;
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CHECK(more == just);
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CHECK(just);
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}
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} // namespace MethodNamespace
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namespace FlagsNamespace {
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enum class Flag : int {
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one = (1 << 0),
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two = (1 << 1),
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three = (1 << 2),
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};
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inline constexpr auto is_flag_type(Flag) { return true; }
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class Class {
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public:
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enum class Public : long {
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one = (1 << 2),
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two = (1 << 1),
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three = (1 << 0),
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};
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friend inline constexpr auto is_flag_type(Public) { return true; }
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static void TestPrivate();
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private:
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enum class Private : long {
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one = (1 << 0),
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two = (1 << 1),
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three = (1 << 2),
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};
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friend inline constexpr auto is_flag_type(Private) { return true; }
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};
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void Class::TestPrivate() {
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MethodNamespace::TestFlags(Private::one, Private::two, Private::three);
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}
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} // namespace FlagsNamespace
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namespace ExtendedNamespace {
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enum class Flag : int {
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one = (1 << 3),
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two = (1 << 4),
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three = (1 << 5),
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};
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} // namespace ExtendedNamespace
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namespace base {
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template<>
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struct extended_flags<ExtendedNamespace::Flag> {
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using type = FlagsNamespace::Flag;
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};
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} // namespace base
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TEST_CASE("flags operators on scoped enums", "[flags]") {
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SECTION("testing non-member flags") {
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MethodNamespace::TestFlags(
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FlagsNamespace::Flag::one,
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FlagsNamespace::Flag::two,
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FlagsNamespace::Flag::three);
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}
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SECTION("testing public member flags") {
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MethodNamespace::TestFlags(
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FlagsNamespace::Class::Public::one,
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FlagsNamespace::Class::Public::two,
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FlagsNamespace::Class::Public::three);
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}
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SECTION("testing private member flags") {
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FlagsNamespace::Class::TestPrivate();
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}
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SECTION("testing extended flags") {
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MethodNamespace::TestFlags(
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ExtendedNamespace::Flag::one,
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ExtendedNamespace::Flag::two,
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ExtendedNamespace::Flag::three);
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auto onetwo = FlagsNamespace::Flag::one | ExtendedNamespace::Flag::two;
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auto twoone = ExtendedNamespace::Flag::two | FlagsNamespace::Flag::one;
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CHECK(onetwo == twoone);
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}
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}
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