| // Copyright 2019 The Pigweed 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 |
| // |
| // https://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 all of the provided headers, even if they aren't tested. |
| #include <algorithm> |
| #include <array> |
| #include <cinttypes> |
| #include <cmath> |
| #include <cstdarg> |
| #include <cstddef> |
| #include <cstdint> |
| #include <cstdio> |
| #include <cstring> |
| #include <initializer_list> |
| #include <iterator> |
| #include <limits> |
| #include <new> |
| #include <string_view> |
| #include <type_traits> |
| #include <utility> |
| |
| #include "gtest/gtest.h" |
| |
| namespace { |
| |
| TEST(Algorithm, Basic) { |
| static_assert(std::min(1, 2) == 1); |
| static_assert(std::max(1, 2) == 2); |
| |
| EXPECT_EQ(std::forward<int>(2), 2); |
| } |
| |
| TEST(Array, Basic) { |
| constexpr std::array<int, 4> array{0, 1, 2, 3}; |
| |
| static_assert(array[2] == 2); |
| |
| for (int i = 0; i < static_cast<int>(array.size()); ++i) { |
| EXPECT_EQ(i, array[i]); |
| } |
| } |
| |
| TEST(Cmath, Basic) { |
| EXPECT_EQ(std::abs(-1), 1); |
| EXPECT_EQ(std::abs(1), 1); |
| |
| EXPECT_TRUE(std::isfinite(1.0)); |
| EXPECT_FALSE(std::isfinite(1.0 / 0.0)); |
| |
| EXPECT_FALSE(std::isnan(1.0)); |
| EXPECT_TRUE(std::isnan(0.0 / 0.0)); |
| |
| EXPECT_FALSE(std::signbit(1.0)); |
| EXPECT_TRUE(std::signbit(-1.0)); |
| } |
| |
| TEST(Cstddef, Basic) { |
| using std::byte; |
| byte foo = byte{12}; |
| EXPECT_EQ(foo, byte{12}); |
| } |
| |
| TEST(Iterator, Basic) { |
| std::array<int, 3> foo{3, 2, 1}; |
| |
| EXPECT_EQ(std::data(foo), foo.data()); |
| EXPECT_EQ(std::size(foo), foo.size()); |
| |
| foo.fill(99); |
| EXPECT_EQ(foo[0], 99); |
| EXPECT_EQ(foo[1], 99); |
| EXPECT_EQ(foo[2], 99); |
| } |
| |
| template <typename T> |
| int SumFromInitializerList(std::initializer_list<T> values) { |
| int sum = 0; |
| for (auto value : values) { |
| sum += value; |
| } |
| return sum; |
| } |
| TEST(InitializerList, Empty) { |
| std::initializer_list<int> mt; |
| EXPECT_EQ(0, SumFromInitializerList(mt)); |
| |
| EXPECT_EQ(0, SumFromInitializerList<float>({})); |
| } |
| |
| TEST(InitializerList, Declared) { |
| std::initializer_list<char> list{'\3', '\3', '\4'}; |
| EXPECT_EQ(10, SumFromInitializerList(list)); |
| } |
| |
| TEST(InitializerList, Inline) { |
| EXPECT_EQ(42, SumFromInitializerList<long>({42})); |
| EXPECT_EQ(2, SumFromInitializerList<bool>({true, false, true})); |
| EXPECT_EQ(15, SumFromInitializerList({1, 2, 3, 4, 5})); |
| } |
| |
| TEST(Limits, Basic) { |
| static_assert(std::numeric_limits<unsigned char>::is_specialized); |
| static_assert(std::numeric_limits<unsigned char>::is_integer); |
| static_assert(std::numeric_limits<unsigned char>::min() == 0u); |
| static_assert(std::numeric_limits<unsigned char>::max() == 255u); |
| |
| static_assert(std::numeric_limits<signed char>::is_specialized); |
| static_assert(std::numeric_limits<signed char>::is_integer); |
| static_assert(std::numeric_limits<signed char>::min() == -128); |
| static_assert(std::numeric_limits<signed char>::max() == 127); |
| |
| // Assume 64-bit long long |
| static_assert(std::numeric_limits<long long>::is_specialized); |
| static_assert(std::numeric_limits<long long>::is_integer); |
| static_assert(std::numeric_limits<long long>::min() == |
| (-9223372036854775807ll - 1)); |
| static_assert(std::numeric_limits<long long>::max() == 9223372036854775807ll); |
| |
| static_assert(std::numeric_limits<unsigned long long>::is_specialized); |
| static_assert(std::numeric_limits<unsigned long long>::is_integer); |
| static_assert(std::numeric_limits<unsigned long long>::min() == 0u); |
| static_assert(std::numeric_limits<unsigned long long>::max() == |
| 18446744073709551615ull); |
| } |
| |
| TEST(New, PlacementNew) { |
| unsigned char value[4]; |
| new (value) int(1234); |
| |
| int int_value; |
| std::memcpy(&int_value, value, sizeof(int_value)); |
| EXPECT_EQ(1234, int_value); |
| } |
| |
| TEST(New, Launder) { |
| unsigned char value[4]; |
| int* int_ptr = std::launder(reinterpret_cast<int*>(value)); |
| EXPECT_EQ(static_cast<void*>(int_ptr), static_cast<void*>(value)); |
| } |
| |
| TEST(StringView, Basic) { |
| constexpr std::string_view value("1234567890"); |
| static_assert(value.size() == 10); |
| static_assert(value[1] == '2'); |
| |
| char buffer[] = "!!!!!"; |
| constexpr size_t buffer_size = sizeof(buffer) - 1; // always keep the \0 |
| |
| value.copy(buffer, buffer_size, 10); |
| EXPECT_STREQ(buffer, "!!!!!"); |
| |
| value.copy(buffer, buffer_size, 9); |
| EXPECT_STREQ(buffer, "0!!!!"); |
| |
| value.copy(buffer, buffer_size, 2); |
| EXPECT_STREQ(buffer, "34567"); |
| |
| value.copy(buffer, buffer_size); |
| EXPECT_STREQ(buffer, "12345"); |
| } |
| |
| TEST(TypeTraits, Basic) { |
| static_assert(std::is_integral_v<bool>); |
| static_assert(!std::is_integral_v<float>); |
| |
| static_assert(std::is_floating_point_v<float>); |
| static_assert(!std::is_floating_point_v<bool>); |
| |
| static_assert(std::is_same_v<float, float>); |
| static_assert(!std::is_same_v<char, unsigned char>); |
| } |
| |
| struct MoveTester { |
| MoveTester(int magic_value) : magic_value(magic_value), moved(false) {} |
| |
| MoveTester(const MoveTester&) = default; |
| |
| MoveTester(MoveTester&& other) : magic_value(other.magic_value), moved(true) { |
| other.magic_value = 0xffff; |
| } |
| |
| int magic_value; |
| bool moved; |
| }; |
| |
| TEST(Utility, Move) { |
| MoveTester test(123); |
| |
| MoveTester copied(test); |
| EXPECT_EQ(copied.magic_value, 123); |
| EXPECT_FALSE(copied.moved); |
| |
| MoveTester moved(std::move(copied)); |
| EXPECT_EQ(123, moved.magic_value); |
| EXPECT_EQ(0xffff, copied.magic_value); |
| EXPECT_TRUE(moved.moved); |
| } |
| |
| } // namespace |