about summary refs log tree commit diff
path: root/absl/time/format_test.cc
blob: a9a1eb8ee1d6c974be0a88329e9731e548cc345a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
// Copyright 2017 The Abseil 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 <cstdint>
#include <limits>
#include <string>

#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/time/internal/test_util.h"
#include "absl/time/time.h"

using testing::HasSubstr;

namespace {

// A helper that tests the given format specifier by itself, and with leading
// and trailing characters.  For example: TestFormatSpecifier(t, "%a", "Thu").
void TestFormatSpecifier(absl::Time t, absl::TimeZone tz,
                         const std::string& fmt, const std::string& ans) {
  EXPECT_EQ(ans, absl::FormatTime(fmt, t, tz));
  EXPECT_EQ("xxx " + ans, absl::FormatTime("xxx " + fmt, t, tz));
  EXPECT_EQ(ans + " yyy", absl::FormatTime(fmt + " yyy", t, tz));
  EXPECT_EQ("xxx " + ans + " yyy",
            absl::FormatTime("xxx " + fmt + " yyy", t, tz));
}

//
// Testing FormatTime()
//

TEST(FormatTime, Basics) {
  absl::TimeZone tz = absl::UTCTimeZone();
  absl::Time t = absl::FromTimeT(0);

  // Starts with a couple basic edge cases.
  EXPECT_EQ("", absl::FormatTime("", t, tz));
  EXPECT_EQ(" ", absl::FormatTime(" ", t, tz));
  EXPECT_EQ("  ", absl::FormatTime("  ", t, tz));
  EXPECT_EQ("xxx", absl::FormatTime("xxx", t, tz));
  std::string big(128, 'x');
  EXPECT_EQ(big, absl::FormatTime(big, t, tz));
  // Cause the 1024-byte buffer to grow.
  std::string bigger(100000, 'x');
  EXPECT_EQ(bigger, absl::FormatTime(bigger, t, tz));

  t += absl::Hours(13) + absl::Minutes(4) + absl::Seconds(5);
  t += absl::Milliseconds(6) + absl::Microseconds(7) + absl::Nanoseconds(8);
  EXPECT_EQ("1970-01-01", absl::FormatTime("%Y-%m-%d", t, tz));
  EXPECT_EQ("13:04:05", absl::FormatTime("%H:%M:%S", t, tz));
  EXPECT_EQ("13:04:05.006", absl::FormatTime("%H:%M:%E3S", t, tz));
  EXPECT_EQ("13:04:05.006007", absl::FormatTime("%H:%M:%E6S", t, tz));
  EXPECT_EQ("13:04:05.006007008", absl::FormatTime("%H:%M:%E9S", t, tz));
}

TEST(FormatTime, LocaleSpecific) {
  const absl::TimeZone tz = absl::UTCTimeZone();
  absl::Time t = absl::FromTimeT(0);

  TestFormatSpecifier(t, tz, "%a", "Thu");
  TestFormatSpecifier(t, tz, "%A", "Thursday");
  TestFormatSpecifier(t, tz, "%b", "Jan");
  TestFormatSpecifier(t, tz, "%B", "January");

  // %c should at least produce the numeric year and time-of-day.
  const std::string s =
      absl::FormatTime("%c", absl::FromTimeT(0), absl::UTCTimeZone());
  EXPECT_THAT(s, HasSubstr("1970"));
  EXPECT_THAT(s, HasSubstr("00:00:00"));

  TestFormatSpecifier(t, tz, "%p", "AM");
  TestFormatSpecifier(t, tz, "%x", "01/01/70");
  TestFormatSpecifier(t, tz, "%X", "00:00:00");
}

TEST(FormatTime, ExtendedSeconds) {
  const absl::TimeZone tz = absl::UTCTimeZone();

  // No subseconds.
  absl::Time t = absl::FromTimeT(0) + absl::Seconds(5);
  EXPECT_EQ("05", absl::FormatTime("%E*S", t, tz));
  EXPECT_EQ("05.000000000000000", absl::FormatTime("%E15S", t, tz));

  // With subseconds.
  t += absl::Milliseconds(6) + absl::Microseconds(7) + absl::Nanoseconds(8);
  EXPECT_EQ("05.006007008", absl::FormatTime("%E*S", t, tz));
  EXPECT_EQ("05", absl::FormatTime("%E0S", t, tz));
  EXPECT_EQ("05.006007008000000", absl::FormatTime("%E15S", t, tz));

  // Times before the Unix epoch.
  t = absl::FromUnixMicros(-1);
  EXPECT_EQ("1969-12-31 23:59:59.999999",
            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));

  // Here is a "%E*S" case we got wrong for a while.  While the first
  // instant below is correctly rendered as "...:07.333304", the second
  // one used to appear as "...:07.33330499999999999".
  t = absl::FromUnixMicros(1395024427333304);
  EXPECT_EQ("2014-03-17 02:47:07.333304",
            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));
  t += absl::Microseconds(1);
  EXPECT_EQ("2014-03-17 02:47:07.333305",
            absl::FormatTime("%Y-%m-%d %H:%M:%E*S", t, tz));
}

TEST(FormatTime, RFC1123FormatPadsYear) {  // locale specific
  absl::TimeZone tz = absl::UTCTimeZone();

  // A year of 77 should be padded to 0077.
  absl::Time t = absl::FromCivil(absl::CivilSecond(77, 6, 28, 9, 8, 7), tz);
  EXPECT_EQ("Mon, 28 Jun 0077 09:08:07 +0000",
            absl::FormatTime(absl::RFC1123_full, t, tz));
  EXPECT_EQ("28 Jun 0077 09:08:07 +0000",
            absl::FormatTime(absl::RFC1123_no_wday, t, tz));
}

TEST(FormatTime, InfiniteTime) {
  absl::TimeZone tz = absl::time_internal::LoadTimeZone("America/Los_Angeles");

  // The format and timezone are ignored.
  EXPECT_EQ("infinite-future",
            absl::FormatTime("%H:%M blah", absl::InfiniteFuture(), tz));
  EXPECT_EQ("infinite-past",
            absl::FormatTime("%H:%M blah", absl::InfinitePast(), tz));
}

//
// Testing ParseTime()
//

TEST(ParseTime, Basics) {
  absl::Time t = absl::FromTimeT(1234567890);
  std::string err;

  // Simple edge cases.
  EXPECT_TRUE(absl::ParseTime("", "", &t, &err)) << err;
  EXPECT_EQ(absl::UnixEpoch(), t);  // everything defaulted
  EXPECT_TRUE(absl::ParseTime(" ", " ", &t, &err)) << err;
  EXPECT_TRUE(absl::ParseTime("  ", "  ", &t, &err)) << err;
  EXPECT_TRUE(absl::ParseTime("x", "x", &t, &err)) << err;
  EXPECT_TRUE(absl::ParseTime("xxx", "xxx", &t, &err)) << err;

  EXPECT_TRUE(absl::ParseTime("%Y-%m-%d %H:%M:%S %z",
                              "2013-06-28 19:08:09 -0800", &t, &err))
      << err;
  const auto ci = absl::FixedTimeZone(-8 * 60 * 60).At(t);
  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
}

TEST(ParseTime, NullErrorString) {
  absl::Time t;
  EXPECT_FALSE(absl::ParseTime("%Q", "invalid format", &t, nullptr));
  EXPECT_FALSE(absl::ParseTime("%H", "12 trailing data", &t, nullptr));
  EXPECT_FALSE(
      absl::ParseTime("%H out of range", "42 out of range", &t, nullptr));
}

TEST(ParseTime, WithTimeZone) {
  const absl::TimeZone tz =
      absl::time_internal::LoadTimeZone("America/Los_Angeles");
  absl::Time t;
  std::string e;

  // We can parse a string without a UTC offset if we supply a timezone.
  EXPECT_TRUE(
      absl::ParseTime("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &t, &e))
      << e;
  auto ci = tz.At(t);
  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);

  // But the timezone is ignored when a UTC offset is present.
  EXPECT_TRUE(absl::ParseTime("%Y-%m-%d %H:%M:%S %z",
                              "2013-06-28 19:08:09 +0800", tz, &t, &e))
      << e;
  ci = absl::FixedTimeZone(8 * 60 * 60).At(t);
  EXPECT_EQ(absl::CivilSecond(2013, 6, 28, 19, 8, 9), ci.cs);
  EXPECT_EQ(absl::ZeroDuration(), ci.subsecond);
}

TEST(ParseTime, ErrorCases) {
  absl::Time t = absl::FromTimeT(0);
  std::string err;

  EXPECT_FALSE(absl::ParseTime("%S", "123", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));

  // Can't parse an illegal format specifier.
  err.clear();
  EXPECT_FALSE(absl::ParseTime("%Q", "x", &t, &err)) << err;
  // Exact contents of "err" are platform-dependent because of
  // differences in the strptime implementation between macOS and Linux.
  EXPECT_FALSE(err.empty());

  // Fails because of trailing, unparsed data "blah".
  EXPECT_FALSE(absl::ParseTime("%m-%d", "2-3 blah", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));

  // Feb 31 requires normalization.
  EXPECT_FALSE(absl::ParseTime("%m-%d", "2-31", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Out-of-range"));

  // Check that we cannot have spaces in UTC offsets.
  EXPECT_TRUE(absl::ParseTime("%z", "-0203", &t, &err)) << err;
  EXPECT_FALSE(absl::ParseTime("%z", "- 2 3", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_TRUE(absl::ParseTime("%Ez", "-02:03", &t, &err)) << err;
  EXPECT_FALSE(absl::ParseTime("%Ez", "- 2: 3", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));

  // Check that we reject other malformed UTC offsets.
  EXPECT_FALSE(absl::ParseTime("%Ez", "+-08:00", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%Ez", "-+08:00", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));

  // Check that we do not accept "-0" in fields that allow zero.
  EXPECT_FALSE(absl::ParseTime("%Y", "-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%E4Y", "-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%H", "-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%M", "-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%S", "-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%z", "+-000", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%Ez", "+-0:00", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
  EXPECT_FALSE(absl::ParseTime("%z", "-00-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
  EXPECT_FALSE(absl::ParseTime("%Ez", "-00:-0", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));
}

TEST(ParseTime, ExtendedSeconds) {
  std::string err;
  absl::Time t;

  // Here is a "%E*S" case we got wrong for a while.  The fractional
  // part of the first instant is less than 2^31 and was correctly
  // parsed, while the second (and any subsecond field >=2^31) failed.
  t = absl::UnixEpoch();
  EXPECT_TRUE(absl::ParseTime("%E*S", "0.2147483647", &t, &err)) << err;
  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
                absl::Nanoseconds(1) / 2,
            t);
  t = absl::UnixEpoch();
  EXPECT_TRUE(absl::ParseTime("%E*S", "0.2147483648", &t, &err)) << err;
  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
                absl::Nanoseconds(3) / 4,
            t);

  // We should also be able to specify long strings of digits far
  // beyond the current resolution and have them convert the same way.
  t = absl::UnixEpoch();
  EXPECT_TRUE(absl::ParseTime(
      "%E*S", "0.214748364801234567890123456789012345678901234567890123456789",
      &t, &err))
      << err;
  EXPECT_EQ(absl::UnixEpoch() + absl::Nanoseconds(214748364) +
                absl::Nanoseconds(3) / 4,
            t);
}

TEST(ParseTime, ExtendedOffsetErrors) {
  std::string err;
  absl::Time t;

  // %z against +-HHMM.
  EXPECT_FALSE(absl::ParseTime("%z", "-123", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));

  // %z against +-HH.
  EXPECT_FALSE(absl::ParseTime("%z", "-1", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));

  // %Ez against +-HH:MM.
  EXPECT_FALSE(absl::ParseTime("%Ez", "-12:3", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));

  // %Ez against +-HHMM.
  EXPECT_FALSE(absl::ParseTime("%Ez", "-123", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Illegal trailing data"));

  // %Ez against +-HH.
  EXPECT_FALSE(absl::ParseTime("%Ez", "-1", &t, &err)) << err;
  EXPECT_THAT(err, HasSubstr("Failed to parse"));
}

TEST(ParseTime, InfiniteTime) {
  absl::Time t;
  std::string err;
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-future", &t, &err));
  EXPECT_EQ(absl::InfiniteFuture(), t);

  // Surrounding whitespace.
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-future", &t, &err));
  EXPECT_EQ(absl::InfiniteFuture(), t);
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-future  ", &t, &err));
  EXPECT_EQ(absl::InfiniteFuture(), t);
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-future  ", &t, &err));
  EXPECT_EQ(absl::InfiniteFuture(), t);

  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-past", &t, &err));
  EXPECT_EQ(absl::InfinitePast(), t);

  // Surrounding whitespace.
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-past", &t, &err));
  EXPECT_EQ(absl::InfinitePast(), t);
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "infinite-past  ", &t, &err));
  EXPECT_EQ(absl::InfinitePast(), t);
  EXPECT_TRUE(absl::ParseTime("%H:%M blah", "  infinite-past  ", &t, &err));
  EXPECT_EQ(absl::InfinitePast(), t);

  // "infinite-future" as literal string
  absl::TimeZone tz = absl::UTCTimeZone();
  EXPECT_TRUE(absl::ParseTime("infinite-future %H:%M", "infinite-future 03:04",
                              &t, &err));
  EXPECT_NE(absl::InfiniteFuture(), t);
  EXPECT_EQ(3, tz.At(t).cs.hour());
  EXPECT_EQ(4, tz.At(t).cs.minute());

  // "infinite-past" as literal string
  EXPECT_TRUE(
      absl::ParseTime("infinite-past %H:%M", "infinite-past 03:04", &t, &err));
  EXPECT_NE(absl::InfinitePast(), t);
  EXPECT_EQ(3, tz.At(t).cs.hour());
  EXPECT_EQ(4, tz.At(t).cs.minute());

  // The input doesn't match the format.
  EXPECT_FALSE(absl::ParseTime("infinite-future %H:%M", "03:04", &t, &err));
  EXPECT_FALSE(absl::ParseTime("infinite-past %H:%M", "03:04", &t, &err));
}

TEST(ParseTime, FailsOnUnrepresentableTime) {
  const absl::TimeZone utc = absl::UTCTimeZone();
  absl::Time t;
  EXPECT_FALSE(
      absl::ParseTime("%Y-%m-%d", "-292277022657-01-27", utc, &t, nullptr));
  EXPECT_TRUE(
      absl::ParseTime("%Y-%m-%d", "-292277022657-01-28", utc, &t, nullptr));
  EXPECT_TRUE(
      absl::ParseTime("%Y-%m-%d", "292277026596-12-04", utc, &t, nullptr));
  EXPECT_FALSE(
      absl::ParseTime("%Y-%m-%d", "292277026596-12-05", utc, &t, nullptr));
}

//
// Roundtrip test for FormatTime()/ParseTime().
//

TEST(FormatParse, RoundTrip) {
  const absl::TimeZone lax =
      absl::time_internal::LoadTimeZone("America/Los_Angeles");
  const absl::Time in =
      absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax);
  const absl::Duration subseconds = absl::Nanoseconds(654321);
  std::string err;

  // RFC3339, which renders subseconds.
  {
    absl::Time out;
    const std::string s =
        absl::FormatTime(absl::RFC3339_full, in + subseconds, lax);
    EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
        << s << ": " << err;
    EXPECT_EQ(in + subseconds, out);  // RFC3339_full includes %Ez
  }

  // RFC1123, which only does whole seconds.
  {
    absl::Time out;
    const std::string s = absl::FormatTime(absl::RFC1123_full, in, lax);
    EXPECT_TRUE(absl::ParseTime(absl::RFC1123_full, s, &out, &err))
        << s << ": " << err;
    EXPECT_EQ(in, out);  // RFC1123_full includes %z
  }

  // `absl::FormatTime()` falls back to strftime() for "%c", which appears to
  // work. On Windows, `absl::ParseTime()` falls back to std::get_time() which
  // appears to fail on "%c" (or at least on the "%c" text produced by
  // `strftime()`). This makes it fail the round-trip test.
  //
  // Under the emscripten compiler `absl::ParseTime() falls back to
  // `strptime()`, but that ends up using a different definition for "%c"
  // compared to `strftime()`, also causing the round-trip test to fail
  // (see https://github.com/kripken/emscripten/pull/7491).
#if !defined(_MSC_VER) && !defined(__EMSCRIPTEN__)
  // Even though we don't know what %c will produce, it should roundtrip,
  // but only in the 0-offset timezone.
  {
    absl::Time out;
    const std::string s = absl::FormatTime("%c", in, absl::UTCTimeZone());
    EXPECT_TRUE(absl::ParseTime("%c", s, &out, &err)) << s << ": " << err;
    EXPECT_EQ(in, out);
  }
#endif  // !_MSC_VER && !__EMSCRIPTEN__
}

TEST(FormatParse, RoundTripDistantFuture) {
  const absl::TimeZone tz = absl::UTCTimeZone();
  const absl::Time in =
      absl::FromUnixSeconds(std::numeric_limits<int64_t>::max());
  std::string err;

  absl::Time out;
  const std::string s = absl::FormatTime(absl::RFC3339_full, in, tz);
  EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
      << s << ": " << err;
  EXPECT_EQ(in, out);
}

TEST(FormatParse, RoundTripDistantPast) {
  const absl::TimeZone tz = absl::UTCTimeZone();
  const absl::Time in =
      absl::FromUnixSeconds(std::numeric_limits<int64_t>::min());
  std::string err;

  absl::Time out;
  const std::string s = absl::FormatTime(absl::RFC3339_full, in, tz);
  EXPECT_TRUE(absl::ParseTime(absl::RFC3339_full, s, &out, &err))
      << s << ": " << err;
  EXPECT_EQ(in, out);
}

}  // namespace