| // Copyright 2017 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #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 |