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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 <set>
#include "dawn/common/BitSetIterator.h"
#include "dawn/common/ityp_bitset.h"
#include "gtest/gtest.h"
// This is ANGLE's BitSetIterator_unittests.cpp file.
class BitSetIteratorTest : public testing::Test {
protected:
std::bitset<40> mStateBits;
};
// Simple iterator test.
TEST_F(BitSetIteratorTest, Iterator) {
std::set<uint32_t> originalValues;
originalValues.insert(2);
originalValues.insert(6);
originalValues.insert(8);
originalValues.insert(35);
for (uint32_t value : originalValues) {
mStateBits.set(value);
}
std::set<uint32_t> readValues;
for (uint32_t bit : IterateBitSet(mStateBits)) {
EXPECT_EQ(1u, originalValues.count(bit));
EXPECT_EQ(0u, readValues.count(bit));
readValues.insert(bit);
}
EXPECT_EQ(originalValues.size(), readValues.size());
}
// Test an empty iterator.
TEST_F(BitSetIteratorTest, EmptySet) {
// We don't use the FAIL gtest macro here since it returns immediately,
// causing an unreachable code warning in MSVC
bool sawBit = false;
for (uint32_t bit : IterateBitSet(mStateBits)) {
DAWN_UNUSED(bit);
sawBit = true;
}
EXPECT_FALSE(sawBit);
}
// Test iterating a result of combining two bitsets.
TEST_F(BitSetIteratorTest, NonLValueBitset) {
std::bitset<40> otherBits;
mStateBits.set(1);
mStateBits.set(2);
mStateBits.set(3);
mStateBits.set(4);
otherBits.set(0);
otherBits.set(1);
otherBits.set(3);
otherBits.set(5);
std::set<uint32_t> seenBits;
for (uint32_t bit : IterateBitSet(mStateBits & otherBits)) {
EXPECT_EQ(0u, seenBits.count(bit));
seenBits.insert(bit);
EXPECT_TRUE(mStateBits[bit]);
EXPECT_TRUE(otherBits[bit]);
}
EXPECT_EQ((mStateBits & otherBits).count(), seenBits.size());
}
class EnumBitSetIteratorTest : public testing::Test {
protected:
enum class TestEnum { A, B, C, D, E, F, G, H, I, J, EnumCount };
static constexpr size_t kEnumCount = static_cast<size_t>(TestEnum::EnumCount);
ityp::bitset<TestEnum, kEnumCount> mStateBits;
};
// Simple iterator test.
TEST_F(EnumBitSetIteratorTest, Iterator) {
std::set<TestEnum> originalValues;
originalValues.insert(TestEnum::B);
originalValues.insert(TestEnum::F);
originalValues.insert(TestEnum::C);
originalValues.insert(TestEnum::I);
for (TestEnum value : originalValues) {
mStateBits.set(value);
}
std::set<TestEnum> readValues;
for (TestEnum bit : IterateBitSet(mStateBits)) {
EXPECT_EQ(1u, originalValues.count(bit));
EXPECT_EQ(0u, readValues.count(bit));
readValues.insert(bit);
}
EXPECT_EQ(originalValues.size(), readValues.size());
}
// Test an empty iterator.
TEST_F(EnumBitSetIteratorTest, EmptySet) {
// We don't use the FAIL gtest macro here since it returns immediately,
// causing an unreachable code warning in MSVC
bool sawBit = false;
for (TestEnum bit : IterateBitSet(mStateBits)) {
DAWN_UNUSED(bit);
sawBit = true;
}
EXPECT_FALSE(sawBit);
}
// Test iterating a result of combining two bitsets.
TEST_F(EnumBitSetIteratorTest, NonLValueBitset) {
ityp::bitset<TestEnum, kEnumCount> otherBits;
mStateBits.set(TestEnum::B);
mStateBits.set(TestEnum::C);
mStateBits.set(TestEnum::D);
mStateBits.set(TestEnum::E);
otherBits.set(TestEnum::A);
otherBits.set(TestEnum::B);
otherBits.set(TestEnum::D);
otherBits.set(TestEnum::F);
std::set<TestEnum> seenBits;
for (TestEnum bit : IterateBitSet(mStateBits & otherBits)) {
EXPECT_EQ(0u, seenBits.count(bit));
seenBits.insert(bit);
EXPECT_TRUE(mStateBits[bit]);
EXPECT_TRUE(otherBits[bit]);
}
EXPECT_EQ((mStateBits & otherBits).count(), seenBits.size());
}
class ITypBitsetIteratorTest : public testing::Test {
protected:
using IntegerT = TypedInteger<struct Foo, uint32_t>;
ityp::bitset<IntegerT, 40> mStateBits;
};
// Simple iterator test.
TEST_F(ITypBitsetIteratorTest, Iterator) {
std::set<IntegerT> originalValues;
originalValues.insert(IntegerT(2));
originalValues.insert(IntegerT(6));
originalValues.insert(IntegerT(8));
originalValues.insert(IntegerT(35));
for (IntegerT value : originalValues) {
mStateBits.set(value);
}
std::set<IntegerT> readValues;
for (IntegerT bit : IterateBitSet(mStateBits)) {
EXPECT_EQ(1u, originalValues.count(bit));
EXPECT_EQ(0u, readValues.count(bit));
readValues.insert(bit);
}
EXPECT_EQ(originalValues.size(), readValues.size());
}
// Test an empty iterator.
TEST_F(ITypBitsetIteratorTest, EmptySet) {
// We don't use the FAIL gtest macro here since it returns immediately,
// causing an unreachable code warning in MSVC
bool sawBit = false;
for (IntegerT bit : IterateBitSet(mStateBits)) {
DAWN_UNUSED(bit);
sawBit = true;
}
EXPECT_FALSE(sawBit);
}
// Test iterating a result of combining two bitsets.
TEST_F(ITypBitsetIteratorTest, NonLValueBitset) {
ityp::bitset<IntegerT, 40> otherBits;
mStateBits.set(IntegerT(1));
mStateBits.set(IntegerT(2));
mStateBits.set(IntegerT(3));
mStateBits.set(IntegerT(4));
otherBits.set(IntegerT(0));
otherBits.set(IntegerT(1));
otherBits.set(IntegerT(3));
otherBits.set(IntegerT(5));
std::set<IntegerT> seenBits;
for (IntegerT bit : IterateBitSet(mStateBits & otherBits)) {
EXPECT_EQ(0u, seenBits.count(bit));
seenBits.insert(bit);
EXPECT_TRUE(mStateBits[bit]);
EXPECT_TRUE(otherBits[bit]);
}
EXPECT_EQ((mStateBits & otherBits).count(), seenBits.size());
}