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// Copyright 2021 The Tint 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 "src/utils/enum_set.h"
#include <sstream>
#include <vector>
#include "gmock/gmock.h"
namespace tint {
namespace utils {
namespace {
using ::testing::ElementsAre;
enum class E { A = 0, B = 3, C = 7 };
std::ostream& operator<<(std::ostream& out, E e) {
switch (e) {
case E::A:
return out << "A";
case E::B:
return out << "B";
case E::C:
return out << "C";
}
return out << "E(" << static_cast<uint32_t>(e) << ")";
}
TEST(EnumSetTest, ConstructEmpty) {
EnumSet<E> set;
EXPECT_FALSE(set.Contains(E::A));
EXPECT_FALSE(set.Contains(E::B));
EXPECT_FALSE(set.Contains(E::C));
}
TEST(EnumSetTest, ConstructWithSingle) {
EnumSet<E> set(E::B);
EXPECT_FALSE(set.Contains(E::A));
EXPECT_TRUE(set.Contains(E::B));
EXPECT_FALSE(set.Contains(E::C));
}
TEST(EnumSetTest, ConstructWithMultiple) {
EnumSet<E> set(E::A, E::C);
EXPECT_TRUE(set.Contains(E::A));
EXPECT_FALSE(set.Contains(E::B));
EXPECT_TRUE(set.Contains(E::C));
}
TEST(EnumSetTest, Add) {
EnumSet<E> set;
set.Add(E::B);
EXPECT_FALSE(set.Contains(E::A));
EXPECT_TRUE(set.Contains(E::B));
EXPECT_FALSE(set.Contains(E::C));
}
TEST(EnumSetTest, Remove) {
EnumSet<E> set(E::A, E::B);
set.Remove(E::B);
EXPECT_TRUE(set.Contains(E::A));
EXPECT_FALSE(set.Contains(E::B));
EXPECT_FALSE(set.Contains(E::C));
}
TEST(EnumSetTest, EqualitySet) {
EXPECT_TRUE(EnumSet<E>(E::A, E::B) == EnumSet<E>(E::A, E::B));
EXPECT_FALSE(EnumSet<E>(E::A, E::B) == EnumSet<E>(E::A, E::C));
}
TEST(EnumSetTest, InequalitySet) {
EXPECT_FALSE(EnumSet<E>(E::A, E::B) != EnumSet<E>(E::A, E::B));
EXPECT_TRUE(EnumSet<E>(E::A, E::B) != EnumSet<E>(E::A, E::C));
}
TEST(EnumSetTest, EqualityEnum) {
EXPECT_TRUE(EnumSet<E>(E::A) == E::A);
EXPECT_FALSE(EnumSet<E>(E::B) == E::A);
EXPECT_FALSE(EnumSet<E>(E::B) == E::C);
EXPECT_FALSE(EnumSet<E>(E::A, E::B) == E::A);
EXPECT_FALSE(EnumSet<E>(E::A, E::B) == E::B);
EXPECT_FALSE(EnumSet<E>(E::A, E::B) == E::C);
}
TEST(EnumSetTest, InequalityEnum) {
EXPECT_FALSE(EnumSet<E>(E::A) != E::A);
EXPECT_TRUE(EnumSet<E>(E::B) != E::A);
EXPECT_TRUE(EnumSet<E>(E::B) != E::C);
EXPECT_TRUE(EnumSet<E>(E::A, E::B) != E::A);
EXPECT_TRUE(EnumSet<E>(E::A, E::B) != E::B);
EXPECT_TRUE(EnumSet<E>(E::A, E::B) != E::C);
}
TEST(EnumSetTest, Hash) {
auto hash = [&](EnumSet<E> s) { return std::hash<EnumSet<E>>()(s); };
EXPECT_EQ(hash(EnumSet<E>(E::A, E::B)), hash(EnumSet<E>(E::A, E::B)));
EXPECT_NE(hash(EnumSet<E>(E::A, E::B)), hash(EnumSet<E>(E::A, E::C)));
}
TEST(EnumSetTest, Value) {
EXPECT_EQ(EnumSet<E>().Value(), 0u);
EXPECT_EQ(EnumSet<E>(E::A).Value(), 1u);
EXPECT_EQ(EnumSet<E>(E::B).Value(), 8u);
EXPECT_EQ(EnumSet<E>(E::C).Value(), 128u);
EXPECT_EQ(EnumSet<E>(E::A, E::C).Value(), 129u);
}
TEST(EnumSetTest, Iterator) {
auto set = EnumSet<E>(E::C, E::A);
auto it = set.begin();
EXPECT_EQ(*it, E::A);
EXPECT_NE(it, set.end());
++it;
EXPECT_EQ(*it, E::C);
EXPECT_NE(it, set.end());
++it;
EXPECT_EQ(it, set.end());
}
TEST(EnumSetTest, IteratorEmpty) {
auto set = EnumSet<E>();
EXPECT_EQ(set.begin(), set.end());
}
TEST(EnumSetTest, Loop) {
auto set = EnumSet<E>(E::C, E::A);
std::vector<E> seen;
for (auto e : set) {
seen.emplace_back(e);
}
EXPECT_THAT(seen, ElementsAre(E::A, E::C));
}
TEST(EnumSetTest, Ostream) {
std::stringstream ss;
ss << EnumSet<E>(E::A, E::C);
EXPECT_EQ(ss.str(), "{A, C}");
}
} // namespace
} // namespace utils
} // namespace tint