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/*
* Copyright 2017 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/string_to_number.h"
#include <stdint.h>
#include <limits>
#include <optional>
#include <string>
#include "absl/strings/string_view.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
// clang-format off
using IntegerTypes =
::testing::Types<char,
signed char, unsigned char, // NOLINT(runtime/int)
short, unsigned short, // NOLINT(runtime/int)
int, unsigned int, // NOLINT(runtime/int)
long, unsigned long, // NOLINT(runtime/int)
long long, unsigned long long, // NOLINT(runtime/int)
int8_t, uint8_t,
int16_t, uint16_t,
int32_t, uint32_t,
int64_t, uint64_t>;
// clang-format on
template <typename T>
class BasicNumberTest : public ::testing::Test {};
TYPED_TEST_SUITE_P(BasicNumberTest);
TYPED_TEST_P(BasicNumberTest, TestValidNumbers) {
using T = TypeParam;
constexpr T min_value = std::numeric_limits<T>::lowest();
constexpr T max_value = std::numeric_limits<T>::max();
constexpr T zero_value = 0;
const std::string min_string = std::to_string(min_value);
const std::string max_string = std::to_string(max_value);
EXPECT_EQ(min_value, StringToNumber<T>(min_string));
EXPECT_EQ(min_value, StringToNumber<T>(min_string.c_str()));
EXPECT_EQ(max_value, StringToNumber<T>(max_string));
EXPECT_EQ(max_value, StringToNumber<T>(max_string.c_str()));
EXPECT_EQ(zero_value, StringToNumber<T>("0"));
EXPECT_EQ(zero_value, StringToNumber<T>("-0"));
EXPECT_EQ(zero_value, StringToNumber<T>(std::string("-0000000000000")));
}
TYPED_TEST_P(BasicNumberTest, TestInvalidNumbers) {
using T = TypeParam;
// Value ranges aren't strictly enforced in this test, since that would either
// require doctoring specific strings for each data type, which is a hassle
// across platforms, or to be able to do addition of values larger than the
// largest type, which is another hassle.
constexpr T min_value = std::numeric_limits<T>::lowest();
constexpr T max_value = std::numeric_limits<T>::max();
// If the type supports negative values, make the large negative value
// approximately ten times larger. If the type is unsigned, just use -2.
const std::string too_low_string =
(min_value == 0) ? "-2" : (std::to_string(min_value) + "1");
// Make the large value approximately ten times larger than the maximum.
const std::string too_large_string = std::to_string(max_value) + "1";
EXPECT_EQ(std::nullopt, StringToNumber<T>(too_low_string));
EXPECT_EQ(std::nullopt, StringToNumber<T>(too_low_string.c_str()));
EXPECT_EQ(std::nullopt, StringToNumber<T>(too_large_string));
EXPECT_EQ(std::nullopt, StringToNumber<T>(too_large_string.c_str()));
}
TYPED_TEST_P(BasicNumberTest, TestInvalidInputs) {
using T = TypeParam;
const char kInvalidCharArray[] = "Invalid string containing 47";
const char kPlusMinusCharArray[] = "+-100";
const char kNumberFollowedByCruft[] = "640x480";
const char kEmbeddedNul[] = {'1', '2', '\0', '3', '4'};
const char kBeginningEmbeddedNul[] = {'\0', '1', '2', '3', '4'};
const char kTrailingEmbeddedNul[] = {'1', '2', '3', '4', '\0'};
EXPECT_EQ(std::nullopt, StringToNumber<T>(kInvalidCharArray));
EXPECT_EQ(std::nullopt, StringToNumber<T>(std::string(kInvalidCharArray)));
EXPECT_EQ(std::nullopt, StringToNumber<T>(kPlusMinusCharArray));
EXPECT_EQ(std::nullopt, StringToNumber<T>(std::string(kPlusMinusCharArray)));
EXPECT_EQ(std::nullopt, StringToNumber<T>(kNumberFollowedByCruft));
EXPECT_EQ(std::nullopt,
StringToNumber<T>(std::string(kNumberFollowedByCruft)));
EXPECT_EQ(std::nullopt, StringToNumber<T>(" 5"));
EXPECT_EQ(std::nullopt, StringToNumber<T>(" - 5"));
EXPECT_EQ(std::nullopt, StringToNumber<T>("- 5"));
EXPECT_EQ(std::nullopt, StringToNumber<T>(" -5"));
EXPECT_EQ(std::nullopt, StringToNumber<T>("5 "));
// Test various types of empty inputs
EXPECT_EQ(std::nullopt, StringToNumber<T>({nullptr, 0}));
EXPECT_EQ(std::nullopt, StringToNumber<T>(""));
EXPECT_EQ(std::nullopt, StringToNumber<T>(std::string()));
EXPECT_EQ(std::nullopt, StringToNumber<T>(std::string("")));
EXPECT_EQ(std::nullopt, StringToNumber<T>(absl::string_view()));
EXPECT_EQ(std::nullopt, StringToNumber<T>(absl::string_view(nullptr, 0)));
EXPECT_EQ(std::nullopt, StringToNumber<T>(absl::string_view("")));
// Test strings with embedded nuls.
EXPECT_EQ(std::nullopt, StringToNumber<T>(absl::string_view(
kEmbeddedNul, sizeof(kEmbeddedNul))));
EXPECT_EQ(std::nullopt,
StringToNumber<T>(absl::string_view(
kBeginningEmbeddedNul, sizeof(kBeginningEmbeddedNul))));
EXPECT_EQ(std::nullopt,
StringToNumber<T>(absl::string_view(kTrailingEmbeddedNul,
sizeof(kTrailingEmbeddedNul))));
}
REGISTER_TYPED_TEST_SUITE_P(BasicNumberTest,
TestValidNumbers,
TestInvalidNumbers,
TestInvalidInputs);
} // namespace
INSTANTIATE_TYPED_TEST_SUITE_P(StringToNumberTest_Integers,
BasicNumberTest,
IntegerTypes);
TEST(StringToNumberTest, TestSpecificValues) {
EXPECT_EQ(std::nullopt, StringToNumber<uint8_t>("256"));
EXPECT_EQ(std::nullopt, StringToNumber<uint8_t>("-256"));
EXPECT_EQ(std::nullopt, StringToNumber<int8_t>("256"));
EXPECT_EQ(std::nullopt, StringToNumber<int8_t>("-256"));
}
} // namespace webrtc
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