1 /*
2 * Copyright 2017 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "rtc_base/string_to_number.h"
12
13 #include <stdint.h>
14
15 #include <limits>
16 #include <string>
17
18 #include "test/gtest.h"
19
20 namespace rtc {
21
22 namespace {
23 // clang-format off
24 using IntegerTypes =
25 ::testing::Types<char,
26 signed char, unsigned char, // NOLINT(runtime/int)
27 short, unsigned short, // NOLINT(runtime/int)
28 int, unsigned int, // NOLINT(runtime/int)
29 long, unsigned long, // NOLINT(runtime/int)
30 long long, unsigned long long, // NOLINT(runtime/int)
31 int8_t, uint8_t,
32 int16_t, uint16_t,
33 int32_t, uint32_t,
34 int64_t, uint64_t>;
35 // clang-format on
36
37 template <typename T>
38 class BasicNumberTest : public ::testing::Test {};
39
40 TYPED_TEST_SUITE_P(BasicNumberTest);
41
TYPED_TEST_P(BasicNumberTest,TestValidNumbers)42 TYPED_TEST_P(BasicNumberTest, TestValidNumbers) {
43 using T = TypeParam;
44 constexpr T min_value = std::numeric_limits<T>::lowest();
45 constexpr T max_value = std::numeric_limits<T>::max();
46 constexpr T zero_value = 0;
47 const std::string min_string = std::to_string(min_value);
48 const std::string max_string = std::to_string(max_value);
49 EXPECT_EQ(min_value, StringToNumber<T>(min_string));
50 EXPECT_EQ(min_value, StringToNumber<T>(min_string.c_str()));
51 EXPECT_EQ(max_value, StringToNumber<T>(max_string));
52 EXPECT_EQ(max_value, StringToNumber<T>(max_string.c_str()));
53 EXPECT_EQ(zero_value, StringToNumber<T>("0"));
54 EXPECT_EQ(zero_value, StringToNumber<T>("-0"));
55 EXPECT_EQ(zero_value, StringToNumber<T>(std::string("-0000000000000")));
56 }
57
TYPED_TEST_P(BasicNumberTest,TestInvalidNumbers)58 TYPED_TEST_P(BasicNumberTest, TestInvalidNumbers) {
59 using T = TypeParam;
60 // Value ranges aren't strictly enforced in this test, since that would either
61 // require doctoring specific strings for each data type, which is a hassle
62 // across platforms, or to be able to do addition of values larger than the
63 // largest type, which is another hassle.
64 constexpr T min_value = std::numeric_limits<T>::lowest();
65 constexpr T max_value = std::numeric_limits<T>::max();
66 // If the type supports negative values, make the large negative value
67 // approximately ten times larger. If the type is unsigned, just use -2.
68 const std::string too_low_string =
69 (min_value == 0) ? "-2" : (std::to_string(min_value) + "1");
70 // Make the large value approximately ten times larger than the maximum.
71 const std::string too_large_string = std::to_string(max_value) + "1";
72 EXPECT_EQ(absl::nullopt, StringToNumber<T>(too_low_string));
73 EXPECT_EQ(absl::nullopt, StringToNumber<T>(too_low_string.c_str()));
74 EXPECT_EQ(absl::nullopt, StringToNumber<T>(too_large_string));
75 EXPECT_EQ(absl::nullopt, StringToNumber<T>(too_large_string.c_str()));
76 }
77
TYPED_TEST_P(BasicNumberTest,TestInvalidInputs)78 TYPED_TEST_P(BasicNumberTest, TestInvalidInputs) {
79 using T = TypeParam;
80 const char kInvalidCharArray[] = "Invalid string containing 47";
81 const char kPlusMinusCharArray[] = "+-100";
82 const char kNumberFollowedByCruft[] = "640x480";
83 EXPECT_EQ(absl::nullopt, StringToNumber<T>(kInvalidCharArray));
84 EXPECT_EQ(absl::nullopt, StringToNumber<T>(std::string(kInvalidCharArray)));
85 EXPECT_EQ(absl::nullopt, StringToNumber<T>(kPlusMinusCharArray));
86 EXPECT_EQ(absl::nullopt, StringToNumber<T>(std::string(kPlusMinusCharArray)));
87 EXPECT_EQ(absl::nullopt, StringToNumber<T>(kNumberFollowedByCruft));
88 EXPECT_EQ(absl::nullopt,
89 StringToNumber<T>(std::string(kNumberFollowedByCruft)));
90 EXPECT_EQ(absl::nullopt, StringToNumber<T>(" 5"));
91 EXPECT_EQ(absl::nullopt, StringToNumber<T>(" - 5"));
92 EXPECT_EQ(absl::nullopt, StringToNumber<T>("- 5"));
93 EXPECT_EQ(absl::nullopt, StringToNumber<T>(" -5"));
94 EXPECT_EQ(absl::nullopt, StringToNumber<T>("5 "));
95 }
96
97 REGISTER_TYPED_TEST_SUITE_P(BasicNumberTest,
98 TestValidNumbers,
99 TestInvalidNumbers,
100 TestInvalidInputs);
101
102 } // namespace
103
104 INSTANTIATE_TYPED_TEST_SUITE_P(StringToNumberTest_Integers,
105 BasicNumberTest,
106 IntegerTypes);
107
TEST(StringToNumberTest,TestSpecificValues)108 TEST(StringToNumberTest, TestSpecificValues) {
109 EXPECT_EQ(absl::nullopt, StringToNumber<uint8_t>("256"));
110 EXPECT_EQ(absl::nullopt, StringToNumber<uint8_t>("-256"));
111 EXPECT_EQ(absl::nullopt, StringToNumber<int8_t>("256"));
112 EXPECT_EQ(absl::nullopt, StringToNumber<int8_t>("-256"));
113 }
114
115 } // namespace rtc
116