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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/tint/utils/math/hash.h"
#include <string>
#include <tuple>
#include <unordered_map>
#include "gtest/gtest.h"
#include "src/tint/utils/containers/vector.h"
namespace tint {
namespace {
TEST(HashTests, Basic) {
EXPECT_EQ(Hash(123), Hash(123));
EXPECT_EQ(Hash(123, 456), Hash(123, 456));
EXPECT_EQ(Hash(123, 456, false), Hash(123, 456, false));
EXPECT_EQ(Hash(std::string("hello")), Hash(std::string("hello")));
}
TEST(HashTests, StdVector) {
EXPECT_EQ(Hash(std::vector<int>({})), Hash(std::vector<int>({})));
EXPECT_EQ(Hash(std::vector<int>({1, 2, 3})), Hash(std::vector<int>({1, 2, 3})));
}
TEST(HashTests, TintVector) {
EXPECT_EQ(Hash(Vector<int, 0>({})), Hash(Vector<int, 0>({})));
EXPECT_EQ(Hash(Vector<int, 0>({1, 2, 3})), Hash(Vector<int, 0>({1, 2, 3})));
EXPECT_EQ(Hash(Vector<int, 3>({1, 2, 3})), Hash(Vector<int, 4>({1, 2, 3})));
EXPECT_EQ(Hash(Vector<int, 3>({1, 2, 3})), Hash(Vector<int, 2>({1, 2, 3})));
}
TEST(HashTests, TintVectorRef) {
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 0>({}))), Hash(VectorRef<int>(Vector<int, 0>({}))));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 0>({1, 2, 3}))),
Hash(VectorRef<int>(Vector<int, 0>({1, 2, 3}))));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 3>({1, 2, 3}))),
Hash(VectorRef<int>(Vector<int, 4>({1, 2, 3}))));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 3>({1, 2, 3}))),
Hash(VectorRef<int>(Vector<int, 2>({1, 2, 3}))));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 0>({}))), Hash(Vector<int, 0>({})));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 0>({1, 2, 3}))), Hash(Vector<int, 0>({1, 2, 3})));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 3>({1, 2, 3}))), Hash(Vector<int, 4>({1, 2, 3})));
EXPECT_EQ(Hash(VectorRef<int>(Vector<int, 3>({1, 2, 3}))), Hash(Vector<int, 2>({1, 2, 3})));
}
TEST(HashTests, Tuple) {
EXPECT_EQ(Hash(std::make_tuple(1)), Hash(std::make_tuple(1)));
EXPECT_EQ(Hash(std::make_tuple(1, 2, 3)), Hash(std::make_tuple(1, 2, 3)));
}
TEST(HashTests, UnorderedKeyWrapper) {
using W = UnorderedKeyWrapper<std::vector<int>>;
std::unordered_map<W, int> m;
m.emplace(W{{1, 2}}, -1);
EXPECT_EQ(m.size(), 1u);
EXPECT_EQ(m[W({1, 2})], -1);
m.emplace(W{{3, 2}}, 1);
EXPECT_EQ(m.size(), 2u);
EXPECT_EQ(m[W({3, 2})], 1);
EXPECT_EQ(m[W({1, 2})], -1);
m.emplace(W{{100}}, 100);
EXPECT_EQ(m.size(), 3u);
EXPECT_EQ(m[W({100})], 100);
EXPECT_EQ(m[W({3, 2})], 1);
EXPECT_EQ(m[W({1, 2})], -1);
// Reversed vector element order
EXPECT_EQ(m[W({2, 3})], 0);
EXPECT_EQ(m[W({2, 1})], 0);
}
TEST(EqualTo, String) {
std::string str_a = "hello";
std::string str_b = "world";
const char* cstr_a = "hello";
const char* cstr_b = "world";
std::string_view sv_a = "hello";
std::string_view sv_b = "world";
EXPECT_TRUE(EqualTo<std::string>()(str_a, str_a));
EXPECT_TRUE(EqualTo<std::string>()(str_a, cstr_a));
EXPECT_TRUE(EqualTo<std::string>()(str_a, sv_a));
EXPECT_TRUE(EqualTo<std::string>()(str_a, str_a));
EXPECT_TRUE(EqualTo<std::string>()(cstr_a, str_a));
EXPECT_TRUE(EqualTo<std::string>()(sv_a, str_a));
EXPECT_FALSE(EqualTo<std::string>()(str_a, str_b));
EXPECT_FALSE(EqualTo<std::string>()(str_a, cstr_b));
EXPECT_FALSE(EqualTo<std::string>()(str_a, sv_b));
EXPECT_FALSE(EqualTo<std::string>()(str_a, str_b));
EXPECT_FALSE(EqualTo<std::string>()(cstr_a, str_b));
EXPECT_FALSE(EqualTo<std::string>()(sv_a, str_b));
EXPECT_FALSE(EqualTo<std::string>()(str_b, str_a));
EXPECT_FALSE(EqualTo<std::string>()(str_b, cstr_a));
EXPECT_FALSE(EqualTo<std::string>()(str_b, sv_a));
EXPECT_FALSE(EqualTo<std::string>()(str_b, str_a));
EXPECT_FALSE(EqualTo<std::string>()(cstr_b, str_a));
EXPECT_FALSE(EqualTo<std::string>()(sv_b, str_a));
EXPECT_TRUE(EqualTo<std::string>()(str_b, str_b));
EXPECT_TRUE(EqualTo<std::string>()(str_b, cstr_b));
EXPECT_TRUE(EqualTo<std::string>()(str_b, sv_b));
EXPECT_TRUE(EqualTo<std::string>()(str_b, str_b));
EXPECT_TRUE(EqualTo<std::string>()(cstr_b, str_b));
EXPECT_TRUE(EqualTo<std::string>()(sv_b, str_b));
}
} // namespace
} // namespace tint