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// Copyright 2017 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "gtest/gtest.h"
#include "dawn/EnumClassBitmasks.h"
namespace dawn {
enum class Color : uint32_t {
R = 1,
G = 2,
B = 4,
A = 8,
};
template <>
struct IsDawnBitmask<Color> {
static constexpr bool enable = true;
};
TEST(BitmaskTests, BasicOperations) {
Color test1 = Color::R | Color::G;
ASSERT_EQ(1u | 2u, static_cast<uint32_t>(test1));
Color test2 = test1 ^ (Color::R | Color::A);
ASSERT_EQ(2u | 8u, static_cast<uint32_t>(test2));
Color test3 = test2 & Color::A;
ASSERT_EQ(8u, static_cast<uint32_t>(test3));
Color test4 = ~test3;
ASSERT_EQ(~uint32_t(8), static_cast<uint32_t>(test4));
}
TEST(BitmaskTests, AssignOperations) {
Color test1 = Color::R;
test1 |= Color::G;
ASSERT_EQ(1u | 2u, static_cast<uint32_t>(test1));
Color test2 = test1;
test2 ^= (Color::R | Color::A);
ASSERT_EQ(2u | 8u, static_cast<uint32_t>(test2));
Color test3 = test2;
test3 &= Color::A;
ASSERT_EQ(8u, static_cast<uint32_t>(test3));
}
TEST(BitmaskTests, BoolConversion) {
bool test1 = Color::R | Color::G;
ASSERT_TRUE(test1);
bool test2 = Color::R & Color::G;
ASSERT_FALSE(test2);
bool test3 = Color::R ^ Color::G;
ASSERT_TRUE(test3);
if (Color::R & ~Color::R) {
ASSERT_TRUE(false);
}
}
TEST(BitmaskTests, ThreeOrs) {
Color c = Color::R | Color::G | Color::B;
ASSERT_EQ(7u, static_cast<uint32_t>(c));
}
TEST(BitmaskTests, ZeroOrOneBits) {
Color zero = static_cast<Color>(0);
ASSERT_TRUE(HasZeroOrOneBits(zero));
ASSERT_TRUE(HasZeroOrOneBits(Color::R));
ASSERT_TRUE(HasZeroOrOneBits(Color::G));
ASSERT_TRUE(HasZeroOrOneBits(Color::B));
ASSERT_TRUE(HasZeroOrOneBits(Color::A));
ASSERT_FALSE(HasZeroOrOneBits(static_cast<Color>(Color::R | Color::G)));
ASSERT_FALSE(HasZeroOrOneBits(static_cast<Color>(Color::G | Color::B)));
ASSERT_FALSE(HasZeroOrOneBits(static_cast<Color>(Color::B | Color::A)));
}
} // namespace dawn