1//===-- Unittests for asctime ---------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/__support/libc_errno.h"
10#include "src/time/asctime.h"
11#include "test/UnitTest/Test.h"
12#include "test/src/time/TmHelper.h"
13
14static inline char *call_asctime(struct tm *tm_data, int year, int month,
15 int mday, int hour, int min, int sec, int wday,
16 int yday) {
17 LIBC_NAMESPACE::tmhelper::testing::initialize_tm_data(
18 tm_data, year, month, mday, hour, min, sec, wday, yday);
19 return LIBC_NAMESPACE::asctime(tm_data);
20}
21
22TEST(LlvmLibcAsctime, Nullptr) {
23 char *result;
24 result = LIBC_NAMESPACE::asctime(nullptr);
25 ASSERT_ERRNO_EQ(EINVAL);
26 ASSERT_STREQ(nullptr, result);
27}
28
29// Weekdays are in the range 0 to 6. Test passing invalid value in wday.
30TEST(LlvmLibcAsctime, InvalidWday) {
31 struct tm tm_data;
32
33 // Test with wday = -1.
34 call_asctime(&tm_data,
35 1970, // year
36 1, // month
37 1, // day
38 0, // hr
39 0, // min
40 0, // sec
41 -1, // wday
42 0); // yday
43 ASSERT_ERRNO_EQ(EINVAL);
44
45 // Test with wday = 7.
46 call_asctime(&tm_data,
47 1970, // year
48 1, // month
49 1, // day
50 0, // hr
51 0, // min
52 0, // sec
53 7, // wday
54 0); // yday
55 ASSERT_ERRNO_EQ(EINVAL);
56}
57
58// Months are from January to December. Test passing invalid value in month.
59TEST(LlvmLibcAsctime, InvalidMonth) {
60 struct tm tm_data;
61
62 // Test with month = 0.
63 call_asctime(&tm_data,
64 1970, // year
65 0, // month
66 1, // day
67 0, // hr
68 0, // min
69 0, // sec
70 4, // wday
71 0); // yday
72 ASSERT_ERRNO_EQ(EINVAL);
73
74 // Test with month = 13.
75 call_asctime(&tm_data,
76 1970, // year
77 13, // month
78 1, // day
79 0, // hr
80 0, // min
81 0, // sec
82 4, // wday
83 0); // yday
84 ASSERT_ERRNO_EQ(EINVAL);
85}
86
87TEST(LlvmLibcAsctime, ValidWeekdays) {
88 struct tm tm_data;
89 char *result;
90 // 1970-01-01 00:00:00.
91 result = call_asctime(&tm_data,
92 1970, // year
93 1, // month
94 1, // day
95 0, // hr
96 0, // min
97 0, // sec
98 4, // wday
99 0); // yday
100 ASSERT_STREQ("Thu Jan 1 00:00:00 1970\n", result);
101
102 // 1970-01-03 00:00:00.
103 result = call_asctime(&tm_data,
104 1970, // year
105 1, // month
106 3, // day
107 0, // hr
108 0, // min
109 0, // sec
110 6, // wday
111 0); // yday
112 ASSERT_STREQ("Sat Jan 3 00:00:00 1970\n", result);
113
114 // 1970-01-04 00:00:00.
115 result = call_asctime(&tm_data,
116 1970, // year
117 1, // month
118 4, // day
119 0, // hr
120 0, // min
121 0, // sec
122 0, // wday
123 0); // yday
124 ASSERT_STREQ("Sun Jan 4 00:00:00 1970\n", result);
125}
126
127TEST(LlvmLibcAsctime, ValidMonths) {
128 struct tm tm_data;
129 char *result;
130 // 1970-01-01 00:00:00.
131 result = call_asctime(&tm_data,
132 1970, // year
133 1, // month
134 1, // day
135 0, // hr
136 0, // min
137 0, // sec
138 4, // wday
139 0); // yday
140 ASSERT_STREQ("Thu Jan 1 00:00:00 1970\n", result);
141
142 // 1970-02-01 00:00:00.
143 result = call_asctime(&tm_data,
144 1970, // year
145 2, // month
146 1, // day
147 0, // hr
148 0, // min
149 0, // sec
150 0, // wday
151 0); // yday
152 ASSERT_STREQ("Sun Feb 1 00:00:00 1970\n", result);
153
154 // 1970-12-31 23:59:59.
155 result = call_asctime(&tm_data,
156 1970, // year
157 12, // month
158 31, // day
159 23, // hr
160 59, // min
161 59, // sec
162 4, // wday
163 0); // yday
164 ASSERT_STREQ("Thu Dec 31 23:59:59 1970\n", result);
165}
166
167TEST(LlvmLibcAsctime, EndOf32BitEpochYear) {
168 struct tm tm_data;
169 char *result;
170 // Test for maximum value of a signed 32-bit integer.
171 // Test implementation can encode time for Tue 19 January 2038 03:14:07 UTC.
172 result = call_asctime(&tm_data,
173 2038, // year
174 1, // month
175 19, // day
176 3, // hr
177 14, // min
178 7, // sec
179 2, // wday
180 7); // yday
181 ASSERT_STREQ("Tue Jan 19 03:14:07 2038\n", result);
182}
183
184TEST(LlvmLibcAsctime, Max64BitYear) {
185 if (sizeof(time_t) == 4)
186 return;
187 // Mon Jan 1 12:50:50 2170 (200 years from 1970),
188 struct tm tm_data;
189 char *result;
190 result = call_asctime(&tm_data,
191 2170, // year
192 1, // month
193 1, // day
194 12, // hr
195 50, // min
196 50, // sec
197 1, // wday
198 50); // yday
199 ASSERT_STREQ("Mon Jan 1 12:50:50 2170\n", result);
200
201 // Test for Tue Jan 1 12:50:50 in 2,147,483,647th year.
202 // This test would cause buffer overflow and thus asctime returns nullptr.
203 result = call_asctime(&tm_data,
204 2147483647, // year
205 1, // month
206 1, // day
207 12, // hr
208 50, // min
209 50, // sec
210 2, // wday
211 50); // yday
212 ASSERT_ERRNO_EQ(EOVERFLOW);
213 ASSERT_STREQ(nullptr, result);
214}
215

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source code of libc/test/src/time/asctime_test.cpp