1 // Copyright 2017 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #if defined(_MSC_VER)
16 #include <winsock2.h> // for timeval
17 #endif
18
19 #include <array>
20 #include <cfloat>
21 #include <chrono> // NOLINT(build/c++11)
22 #include <cmath>
23 #include <cstdint>
24 #include <ctime>
25 #include <iomanip>
26 #include <limits>
27 #include <random>
28 #include <string>
29
30 #include "gmock/gmock.h"
31 #include "gtest/gtest.h"
32 #include "absl/strings/str_format.h"
33 #include "absl/time/time.h"
34
35 namespace {
36
37 constexpr int64_t kint64max = std::numeric_limits<int64_t>::max();
38 constexpr int64_t kint64min = std::numeric_limits<int64_t>::min();
39
40 // Approximates the given number of years. This is only used to make some test
41 // code more readable.
ApproxYears(int64_t n)42 absl::Duration ApproxYears(int64_t n) { return absl::Hours(n) * 365 * 24; }
43
44 // A gMock matcher to match timespec values. Use this matcher like:
45 // timespec ts1, ts2;
46 // EXPECT_THAT(ts1, TimespecMatcher(ts2));
47 MATCHER_P(TimespecMatcher, ts, "") {
48 if (ts.tv_sec == arg.tv_sec && ts.tv_nsec == arg.tv_nsec)
49 return true;
50 *result_listener << "expected: {" << ts.tv_sec << ", " << ts.tv_nsec << "} ";
51 *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_nsec << "}";
52 return false;
53 }
54
55 // A gMock matcher to match timeval values. Use this matcher like:
56 // timeval tv1, tv2;
57 // EXPECT_THAT(tv1, TimevalMatcher(tv2));
58 MATCHER_P(TimevalMatcher, tv, "") {
59 if (tv.tv_sec == arg.tv_sec && tv.tv_usec == arg.tv_usec)
60 return true;
61 *result_listener << "expected: {" << tv.tv_sec << ", " << tv.tv_usec << "} ";
62 *result_listener << "actual: {" << arg.tv_sec << ", " << arg.tv_usec << "}";
63 return false;
64 }
65
TEST(Duration,ConstExpr)66 TEST(Duration, ConstExpr) {
67 constexpr absl::Duration d0 = absl::ZeroDuration();
68 static_assert(d0 == absl::ZeroDuration(), "ZeroDuration()");
69 constexpr absl::Duration d1 = absl::Seconds(1);
70 static_assert(d1 == absl::Seconds(1), "Seconds(1)");
71 static_assert(d1 != absl::ZeroDuration(), "Seconds(1)");
72 constexpr absl::Duration d2 = absl::InfiniteDuration();
73 static_assert(d2 == absl::InfiniteDuration(), "InfiniteDuration()");
74 static_assert(d2 != absl::ZeroDuration(), "InfiniteDuration()");
75 }
76
TEST(Duration,ValueSemantics)77 TEST(Duration, ValueSemantics) {
78 // If this compiles, the test passes.
79 constexpr absl::Duration a; // Default construction
80 constexpr absl::Duration b = a; // Copy construction
81 constexpr absl::Duration c(b); // Copy construction (again)
82
83 absl::Duration d;
84 d = c; // Assignment
85 }
86
TEST(Duration,Factories)87 TEST(Duration, Factories) {
88 constexpr absl::Duration zero = absl::ZeroDuration();
89 constexpr absl::Duration nano = absl::Nanoseconds(1);
90 constexpr absl::Duration micro = absl::Microseconds(1);
91 constexpr absl::Duration milli = absl::Milliseconds(1);
92 constexpr absl::Duration sec = absl::Seconds(1);
93 constexpr absl::Duration min = absl::Minutes(1);
94 constexpr absl::Duration hour = absl::Hours(1);
95
96 EXPECT_EQ(zero, absl::Duration());
97 EXPECT_EQ(zero, absl::Seconds(0));
98 EXPECT_EQ(nano, absl::Nanoseconds(1));
99 EXPECT_EQ(micro, absl::Nanoseconds(1000));
100 EXPECT_EQ(milli, absl::Microseconds(1000));
101 EXPECT_EQ(sec, absl::Milliseconds(1000));
102 EXPECT_EQ(min, absl::Seconds(60));
103 EXPECT_EQ(hour, absl::Minutes(60));
104
105 // Tests factory limits
106 const absl::Duration inf = absl::InfiniteDuration();
107
108 EXPECT_GT(inf, absl::Seconds(kint64max));
109 EXPECT_LT(-inf, absl::Seconds(kint64min));
110 EXPECT_LT(-inf, absl::Seconds(-kint64max));
111
112 EXPECT_EQ(inf, absl::Minutes(kint64max));
113 EXPECT_EQ(-inf, absl::Minutes(kint64min));
114 EXPECT_EQ(-inf, absl::Minutes(-kint64max));
115 EXPECT_GT(inf, absl::Minutes(kint64max / 60));
116 EXPECT_LT(-inf, absl::Minutes(kint64min / 60));
117 EXPECT_LT(-inf, absl::Minutes(-kint64max / 60));
118
119 EXPECT_EQ(inf, absl::Hours(kint64max));
120 EXPECT_EQ(-inf, absl::Hours(kint64min));
121 EXPECT_EQ(-inf, absl::Hours(-kint64max));
122 EXPECT_GT(inf, absl::Hours(kint64max / 3600));
123 EXPECT_LT(-inf, absl::Hours(kint64min / 3600));
124 EXPECT_LT(-inf, absl::Hours(-kint64max / 3600));
125 }
126
TEST(Duration,ToConversion)127 TEST(Duration, ToConversion) {
128 #define TEST_DURATION_CONVERSION(UNIT) \
129 do { \
130 const absl::Duration d = absl::UNIT(1.5); \
131 constexpr absl::Duration z = absl::ZeroDuration(); \
132 constexpr absl::Duration inf = absl::InfiniteDuration(); \
133 constexpr double dbl_inf = std::numeric_limits<double>::infinity(); \
134 EXPECT_EQ(kint64min, absl::ToInt64##UNIT(-inf)); \
135 EXPECT_EQ(-1, absl::ToInt64##UNIT(-d)); \
136 EXPECT_EQ(0, absl::ToInt64##UNIT(z)); \
137 EXPECT_EQ(1, absl::ToInt64##UNIT(d)); \
138 EXPECT_EQ(kint64max, absl::ToInt64##UNIT(inf)); \
139 EXPECT_EQ(-dbl_inf, absl::ToDouble##UNIT(-inf)); \
140 EXPECT_EQ(-1.5, absl::ToDouble##UNIT(-d)); \
141 EXPECT_EQ(0, absl::ToDouble##UNIT(z)); \
142 EXPECT_EQ(1.5, absl::ToDouble##UNIT(d)); \
143 EXPECT_EQ(dbl_inf, absl::ToDouble##UNIT(inf)); \
144 } while (0)
145
146 TEST_DURATION_CONVERSION(Nanoseconds);
147 TEST_DURATION_CONVERSION(Microseconds);
148 TEST_DURATION_CONVERSION(Milliseconds);
149 TEST_DURATION_CONVERSION(Seconds);
150 TEST_DURATION_CONVERSION(Minutes);
151 TEST_DURATION_CONVERSION(Hours);
152
153 #undef TEST_DURATION_CONVERSION
154 }
155
156 template <int64_t N>
TestToConversion()157 void TestToConversion() {
158 constexpr absl::Duration nano = absl::Nanoseconds(N);
159 EXPECT_EQ(N, absl::ToInt64Nanoseconds(nano));
160 EXPECT_EQ(0, absl::ToInt64Microseconds(nano));
161 EXPECT_EQ(0, absl::ToInt64Milliseconds(nano));
162 EXPECT_EQ(0, absl::ToInt64Seconds(nano));
163 EXPECT_EQ(0, absl::ToInt64Minutes(nano));
164 EXPECT_EQ(0, absl::ToInt64Hours(nano));
165 const absl::Duration micro = absl::Microseconds(N);
166 EXPECT_EQ(N * 1000, absl::ToInt64Nanoseconds(micro));
167 EXPECT_EQ(N, absl::ToInt64Microseconds(micro));
168 EXPECT_EQ(0, absl::ToInt64Milliseconds(micro));
169 EXPECT_EQ(0, absl::ToInt64Seconds(micro));
170 EXPECT_EQ(0, absl::ToInt64Minutes(micro));
171 EXPECT_EQ(0, absl::ToInt64Hours(micro));
172 const absl::Duration milli = absl::Milliseconds(N);
173 EXPECT_EQ(N * 1000 * 1000, absl::ToInt64Nanoseconds(milli));
174 EXPECT_EQ(N * 1000, absl::ToInt64Microseconds(milli));
175 EXPECT_EQ(N, absl::ToInt64Milliseconds(milli));
176 EXPECT_EQ(0, absl::ToInt64Seconds(milli));
177 EXPECT_EQ(0, absl::ToInt64Minutes(milli));
178 EXPECT_EQ(0, absl::ToInt64Hours(milli));
179 const absl::Duration sec = absl::Seconds(N);
180 EXPECT_EQ(N * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(sec));
181 EXPECT_EQ(N * 1000 * 1000, absl::ToInt64Microseconds(sec));
182 EXPECT_EQ(N * 1000, absl::ToInt64Milliseconds(sec));
183 EXPECT_EQ(N, absl::ToInt64Seconds(sec));
184 EXPECT_EQ(0, absl::ToInt64Minutes(sec));
185 EXPECT_EQ(0, absl::ToInt64Hours(sec));
186 const absl::Duration min = absl::Minutes(N);
187 EXPECT_EQ(N * 60 * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(min));
188 EXPECT_EQ(N * 60 * 1000 * 1000, absl::ToInt64Microseconds(min));
189 EXPECT_EQ(N * 60 * 1000, absl::ToInt64Milliseconds(min));
190 EXPECT_EQ(N * 60, absl::ToInt64Seconds(min));
191 EXPECT_EQ(N, absl::ToInt64Minutes(min));
192 EXPECT_EQ(0, absl::ToInt64Hours(min));
193 const absl::Duration hour = absl::Hours(N);
194 EXPECT_EQ(N * 60 * 60 * 1000 * 1000 * 1000, absl::ToInt64Nanoseconds(hour));
195 EXPECT_EQ(N * 60 * 60 * 1000 * 1000, absl::ToInt64Microseconds(hour));
196 EXPECT_EQ(N * 60 * 60 * 1000, absl::ToInt64Milliseconds(hour));
197 EXPECT_EQ(N * 60 * 60, absl::ToInt64Seconds(hour));
198 EXPECT_EQ(N * 60, absl::ToInt64Minutes(hour));
199 EXPECT_EQ(N, absl::ToInt64Hours(hour));
200 }
201
TEST(Duration,ToConversionDeprecated)202 TEST(Duration, ToConversionDeprecated) {
203 TestToConversion<43>();
204 TestToConversion<1>();
205 TestToConversion<0>();
206 TestToConversion<-1>();
207 TestToConversion<-43>();
208 }
209
210 template <int64_t N>
TestFromChronoBasicEquality()211 void TestFromChronoBasicEquality() {
212 using std::chrono::nanoseconds;
213 using std::chrono::microseconds;
214 using std::chrono::milliseconds;
215 using std::chrono::seconds;
216 using std::chrono::minutes;
217 using std::chrono::hours;
218
219 static_assert(absl::Nanoseconds(N) == absl::FromChrono(nanoseconds(N)), "");
220 static_assert(absl::Microseconds(N) == absl::FromChrono(microseconds(N)), "");
221 static_assert(absl::Milliseconds(N) == absl::FromChrono(milliseconds(N)), "");
222 static_assert(absl::Seconds(N) == absl::FromChrono(seconds(N)), "");
223 static_assert(absl::Minutes(N) == absl::FromChrono(minutes(N)), "");
224 static_assert(absl::Hours(N) == absl::FromChrono(hours(N)), "");
225 }
226
TEST(Duration,FromChrono)227 TEST(Duration, FromChrono) {
228 TestFromChronoBasicEquality<-123>();
229 TestFromChronoBasicEquality<-1>();
230 TestFromChronoBasicEquality<0>();
231 TestFromChronoBasicEquality<1>();
232 TestFromChronoBasicEquality<123>();
233
234 // Minutes (might, depending on the platform) saturate at +inf.
235 const auto chrono_minutes_max = std::chrono::minutes::max();
236 const auto minutes_max = absl::FromChrono(chrono_minutes_max);
237 const int64_t minutes_max_count = chrono_minutes_max.count();
238 if (minutes_max_count > kint64max / 60) {
239 EXPECT_EQ(absl::InfiniteDuration(), minutes_max);
240 } else {
241 EXPECT_EQ(absl::Minutes(minutes_max_count), minutes_max);
242 }
243
244 // Minutes (might, depending on the platform) saturate at -inf.
245 const auto chrono_minutes_min = std::chrono::minutes::min();
246 const auto minutes_min = absl::FromChrono(chrono_minutes_min);
247 const int64_t minutes_min_count = chrono_minutes_min.count();
248 if (minutes_min_count < kint64min / 60) {
249 EXPECT_EQ(-absl::InfiniteDuration(), minutes_min);
250 } else {
251 EXPECT_EQ(absl::Minutes(minutes_min_count), minutes_min);
252 }
253
254 // Hours (might, depending on the platform) saturate at +inf.
255 const auto chrono_hours_max = std::chrono::hours::max();
256 const auto hours_max = absl::FromChrono(chrono_hours_max);
257 const int64_t hours_max_count = chrono_hours_max.count();
258 if (hours_max_count > kint64max / 3600) {
259 EXPECT_EQ(absl::InfiniteDuration(), hours_max);
260 } else {
261 EXPECT_EQ(absl::Hours(hours_max_count), hours_max);
262 }
263
264 // Hours (might, depending on the platform) saturate at -inf.
265 const auto chrono_hours_min = std::chrono::hours::min();
266 const auto hours_min = absl::FromChrono(chrono_hours_min);
267 const int64_t hours_min_count = chrono_hours_min.count();
268 if (hours_min_count < kint64min / 3600) {
269 EXPECT_EQ(-absl::InfiniteDuration(), hours_min);
270 } else {
271 EXPECT_EQ(absl::Hours(hours_min_count), hours_min);
272 }
273 }
274
275 template <int64_t N>
TestToChrono()276 void TestToChrono() {
277 using std::chrono::nanoseconds;
278 using std::chrono::microseconds;
279 using std::chrono::milliseconds;
280 using std::chrono::seconds;
281 using std::chrono::minutes;
282 using std::chrono::hours;
283
284 EXPECT_EQ(nanoseconds(N), absl::ToChronoNanoseconds(absl::Nanoseconds(N)));
285 EXPECT_EQ(microseconds(N), absl::ToChronoMicroseconds(absl::Microseconds(N)));
286 EXPECT_EQ(milliseconds(N), absl::ToChronoMilliseconds(absl::Milliseconds(N)));
287 EXPECT_EQ(seconds(N), absl::ToChronoSeconds(absl::Seconds(N)));
288
289 constexpr auto absl_minutes = absl::Minutes(N);
290 auto chrono_minutes = minutes(N);
291 if (absl_minutes == -absl::InfiniteDuration()) {
292 chrono_minutes = minutes::min();
293 } else if (absl_minutes == absl::InfiniteDuration()) {
294 chrono_minutes = minutes::max();
295 }
296 EXPECT_EQ(chrono_minutes, absl::ToChronoMinutes(absl_minutes));
297
298 constexpr auto absl_hours = absl::Hours(N);
299 auto chrono_hours = hours(N);
300 if (absl_hours == -absl::InfiniteDuration()) {
301 chrono_hours = hours::min();
302 } else if (absl_hours == absl::InfiniteDuration()) {
303 chrono_hours = hours::max();
304 }
305 EXPECT_EQ(chrono_hours, absl::ToChronoHours(absl_hours));
306 }
307
TEST(Duration,ToChrono)308 TEST(Duration, ToChrono) {
309 using std::chrono::nanoseconds;
310 using std::chrono::microseconds;
311 using std::chrono::milliseconds;
312 using std::chrono::seconds;
313 using std::chrono::minutes;
314 using std::chrono::hours;
315
316 TestToChrono<kint64min>();
317 TestToChrono<-1>();
318 TestToChrono<0>();
319 TestToChrono<1>();
320 TestToChrono<kint64max>();
321
322 // Verify truncation toward zero.
323 const auto tick = absl::Nanoseconds(1) / 4;
324 EXPECT_EQ(nanoseconds(0), absl::ToChronoNanoseconds(tick));
325 EXPECT_EQ(nanoseconds(0), absl::ToChronoNanoseconds(-tick));
326 EXPECT_EQ(microseconds(0), absl::ToChronoMicroseconds(tick));
327 EXPECT_EQ(microseconds(0), absl::ToChronoMicroseconds(-tick));
328 EXPECT_EQ(milliseconds(0), absl::ToChronoMilliseconds(tick));
329 EXPECT_EQ(milliseconds(0), absl::ToChronoMilliseconds(-tick));
330 EXPECT_EQ(seconds(0), absl::ToChronoSeconds(tick));
331 EXPECT_EQ(seconds(0), absl::ToChronoSeconds(-tick));
332 EXPECT_EQ(minutes(0), absl::ToChronoMinutes(tick));
333 EXPECT_EQ(minutes(0), absl::ToChronoMinutes(-tick));
334 EXPECT_EQ(hours(0), absl::ToChronoHours(tick));
335 EXPECT_EQ(hours(0), absl::ToChronoHours(-tick));
336
337 // Verifies +/- infinity saturation at max/min.
338 constexpr auto inf = absl::InfiniteDuration();
339 EXPECT_EQ(nanoseconds::min(), absl::ToChronoNanoseconds(-inf));
340 EXPECT_EQ(nanoseconds::max(), absl::ToChronoNanoseconds(inf));
341 EXPECT_EQ(microseconds::min(), absl::ToChronoMicroseconds(-inf));
342 EXPECT_EQ(microseconds::max(), absl::ToChronoMicroseconds(inf));
343 EXPECT_EQ(milliseconds::min(), absl::ToChronoMilliseconds(-inf));
344 EXPECT_EQ(milliseconds::max(), absl::ToChronoMilliseconds(inf));
345 EXPECT_EQ(seconds::min(), absl::ToChronoSeconds(-inf));
346 EXPECT_EQ(seconds::max(), absl::ToChronoSeconds(inf));
347 EXPECT_EQ(minutes::min(), absl::ToChronoMinutes(-inf));
348 EXPECT_EQ(minutes::max(), absl::ToChronoMinutes(inf));
349 EXPECT_EQ(hours::min(), absl::ToChronoHours(-inf));
350 EXPECT_EQ(hours::max(), absl::ToChronoHours(inf));
351 }
352
TEST(Duration,FactoryOverloads)353 TEST(Duration, FactoryOverloads) {
354 enum E { kOne = 1 };
355 #define TEST_FACTORY_OVERLOADS(NAME) \
356 EXPECT_EQ(1, NAME(kOne) / NAME(kOne)); \
357 EXPECT_EQ(1, NAME(static_cast<int8_t>(1)) / NAME(1)); \
358 EXPECT_EQ(1, NAME(static_cast<int16_t>(1)) / NAME(1)); \
359 EXPECT_EQ(1, NAME(static_cast<int32_t>(1)) / NAME(1)); \
360 EXPECT_EQ(1, NAME(static_cast<int64_t>(1)) / NAME(1)); \
361 EXPECT_EQ(1, NAME(static_cast<uint8_t>(1)) / NAME(1)); \
362 EXPECT_EQ(1, NAME(static_cast<uint16_t>(1)) / NAME(1)); \
363 EXPECT_EQ(1, NAME(static_cast<uint32_t>(1)) / NAME(1)); \
364 EXPECT_EQ(1, NAME(static_cast<uint64_t>(1)) / NAME(1)); \
365 EXPECT_EQ(NAME(1) / 2, NAME(static_cast<float>(0.5))); \
366 EXPECT_EQ(NAME(1) / 2, NAME(static_cast<double>(0.5))); \
367 EXPECT_EQ(1.5, absl::FDivDuration(NAME(static_cast<float>(1.5)), NAME(1))); \
368 EXPECT_EQ(1.5, absl::FDivDuration(NAME(static_cast<double>(1.5)), NAME(1)));
369
370 TEST_FACTORY_OVERLOADS(absl::Nanoseconds);
371 TEST_FACTORY_OVERLOADS(absl::Microseconds);
372 TEST_FACTORY_OVERLOADS(absl::Milliseconds);
373 TEST_FACTORY_OVERLOADS(absl::Seconds);
374 TEST_FACTORY_OVERLOADS(absl::Minutes);
375 TEST_FACTORY_OVERLOADS(absl::Hours);
376
377 #undef TEST_FACTORY_OVERLOADS
378
379 EXPECT_EQ(absl::Milliseconds(1500), absl::Seconds(1.5));
380 EXPECT_LT(absl::Nanoseconds(1), absl::Nanoseconds(1.5));
381 EXPECT_GT(absl::Nanoseconds(2), absl::Nanoseconds(1.5));
382
383 const double dbl_inf = std::numeric_limits<double>::infinity();
384 EXPECT_EQ(absl::InfiniteDuration(), absl::Nanoseconds(dbl_inf));
385 EXPECT_EQ(absl::InfiniteDuration(), absl::Microseconds(dbl_inf));
386 EXPECT_EQ(absl::InfiniteDuration(), absl::Milliseconds(dbl_inf));
387 EXPECT_EQ(absl::InfiniteDuration(), absl::Seconds(dbl_inf));
388 EXPECT_EQ(absl::InfiniteDuration(), absl::Minutes(dbl_inf));
389 EXPECT_EQ(absl::InfiniteDuration(), absl::Hours(dbl_inf));
390 EXPECT_EQ(-absl::InfiniteDuration(), absl::Nanoseconds(-dbl_inf));
391 EXPECT_EQ(-absl::InfiniteDuration(), absl::Microseconds(-dbl_inf));
392 EXPECT_EQ(-absl::InfiniteDuration(), absl::Milliseconds(-dbl_inf));
393 EXPECT_EQ(-absl::InfiniteDuration(), absl::Seconds(-dbl_inf));
394 EXPECT_EQ(-absl::InfiniteDuration(), absl::Minutes(-dbl_inf));
395 EXPECT_EQ(-absl::InfiniteDuration(), absl::Hours(-dbl_inf));
396 }
397
TEST(Duration,InfinityExamples)398 TEST(Duration, InfinityExamples) {
399 // These examples are used in the documentation in time.h. They are
400 // written so that they can be copy-n-pasted easily.
401
402 constexpr absl::Duration inf = absl::InfiniteDuration();
403 constexpr absl::Duration d = absl::Seconds(1); // Any finite duration
404
405 EXPECT_TRUE(inf == inf + inf);
406 EXPECT_TRUE(inf == inf + d);
407 EXPECT_TRUE(inf == inf - inf);
408 EXPECT_TRUE(-inf == d - inf);
409
410 EXPECT_TRUE(inf == d * 1e100);
411 EXPECT_TRUE(0 == d / inf); // NOLINT(readability/check)
412
413 // Division by zero returns infinity, or kint64min/MAX where necessary.
414 EXPECT_TRUE(inf == d / 0);
415 EXPECT_TRUE(kint64max == d / absl::ZeroDuration());
416 }
417
TEST(Duration,InfinityComparison)418 TEST(Duration, InfinityComparison) {
419 const absl::Duration inf = absl::InfiniteDuration();
420 const absl::Duration any_dur = absl::Seconds(1);
421
422 // Equality
423 EXPECT_EQ(inf, inf);
424 EXPECT_EQ(-inf, -inf);
425 EXPECT_NE(inf, -inf);
426 EXPECT_NE(any_dur, inf);
427 EXPECT_NE(any_dur, -inf);
428
429 // Relational
430 EXPECT_GT(inf, any_dur);
431 EXPECT_LT(-inf, any_dur);
432 EXPECT_LT(-inf, inf);
433 EXPECT_GT(inf, -inf);
434 }
435
TEST(Duration,InfinityAddition)436 TEST(Duration, InfinityAddition) {
437 const absl::Duration sec_max = absl::Seconds(kint64max);
438 const absl::Duration sec_min = absl::Seconds(kint64min);
439 const absl::Duration any_dur = absl::Seconds(1);
440 const absl::Duration inf = absl::InfiniteDuration();
441
442 // Addition
443 EXPECT_EQ(inf, inf + inf);
444 EXPECT_EQ(inf, inf + -inf);
445 EXPECT_EQ(-inf, -inf + inf);
446 EXPECT_EQ(-inf, -inf + -inf);
447
448 EXPECT_EQ(inf, inf + any_dur);
449 EXPECT_EQ(inf, any_dur + inf);
450 EXPECT_EQ(-inf, -inf + any_dur);
451 EXPECT_EQ(-inf, any_dur + -inf);
452
453 // Interesting case
454 absl::Duration almost_inf = sec_max + absl::Nanoseconds(999999999);
455 EXPECT_GT(inf, almost_inf);
456 almost_inf += -absl::Nanoseconds(999999999);
457 EXPECT_GT(inf, almost_inf);
458
459 // Addition overflow/underflow
460 EXPECT_EQ(inf, sec_max + absl::Seconds(1));
461 EXPECT_EQ(inf, sec_max + sec_max);
462 EXPECT_EQ(-inf, sec_min + -absl::Seconds(1));
463 EXPECT_EQ(-inf, sec_min + -sec_max);
464
465 // For reference: IEEE 754 behavior
466 const double dbl_inf = std::numeric_limits<double>::infinity();
467 EXPECT_TRUE(std::isinf(dbl_inf + dbl_inf));
468 EXPECT_TRUE(std::isnan(dbl_inf + -dbl_inf)); // We return inf
469 EXPECT_TRUE(std::isnan(-dbl_inf + dbl_inf)); // We return inf
470 EXPECT_TRUE(std::isinf(-dbl_inf + -dbl_inf));
471 }
472
TEST(Duration,InfinitySubtraction)473 TEST(Duration, InfinitySubtraction) {
474 const absl::Duration sec_max = absl::Seconds(kint64max);
475 const absl::Duration sec_min = absl::Seconds(kint64min);
476 const absl::Duration any_dur = absl::Seconds(1);
477 const absl::Duration inf = absl::InfiniteDuration();
478
479 // Subtraction
480 EXPECT_EQ(inf, inf - inf);
481 EXPECT_EQ(inf, inf - -inf);
482 EXPECT_EQ(-inf, -inf - inf);
483 EXPECT_EQ(-inf, -inf - -inf);
484
485 EXPECT_EQ(inf, inf - any_dur);
486 EXPECT_EQ(-inf, any_dur - inf);
487 EXPECT_EQ(-inf, -inf - any_dur);
488 EXPECT_EQ(inf, any_dur - -inf);
489
490 // Subtraction overflow/underflow
491 EXPECT_EQ(inf, sec_max - -absl::Seconds(1));
492 EXPECT_EQ(inf, sec_max - -sec_max);
493 EXPECT_EQ(-inf, sec_min - absl::Seconds(1));
494 EXPECT_EQ(-inf, sec_min - sec_max);
495
496 // Interesting case
497 absl::Duration almost_neg_inf = sec_min;
498 EXPECT_LT(-inf, almost_neg_inf);
499 almost_neg_inf -= -absl::Nanoseconds(1);
500 EXPECT_LT(-inf, almost_neg_inf);
501
502 // For reference: IEEE 754 behavior
503 const double dbl_inf = std::numeric_limits<double>::infinity();
504 EXPECT_TRUE(std::isnan(dbl_inf - dbl_inf)); // We return inf
505 EXPECT_TRUE(std::isinf(dbl_inf - -dbl_inf));
506 EXPECT_TRUE(std::isinf(-dbl_inf - dbl_inf));
507 EXPECT_TRUE(std::isnan(-dbl_inf - -dbl_inf)); // We return inf
508 }
509
TEST(Duration,InfinityMultiplication)510 TEST(Duration, InfinityMultiplication) {
511 const absl::Duration sec_max = absl::Seconds(kint64max);
512 const absl::Duration sec_min = absl::Seconds(kint64min);
513 const absl::Duration inf = absl::InfiniteDuration();
514
515 #define TEST_INF_MUL_WITH_TYPE(T) \
516 EXPECT_EQ(inf, inf * static_cast<T>(2)); \
517 EXPECT_EQ(-inf, inf * static_cast<T>(-2)); \
518 EXPECT_EQ(-inf, -inf * static_cast<T>(2)); \
519 EXPECT_EQ(inf, -inf * static_cast<T>(-2)); \
520 EXPECT_EQ(inf, inf * static_cast<T>(0)); \
521 EXPECT_EQ(-inf, -inf * static_cast<T>(0)); \
522 EXPECT_EQ(inf, sec_max * static_cast<T>(2)); \
523 EXPECT_EQ(inf, sec_min * static_cast<T>(-2)); \
524 EXPECT_EQ(inf, (sec_max / static_cast<T>(2)) * static_cast<T>(3)); \
525 EXPECT_EQ(-inf, sec_max * static_cast<T>(-2)); \
526 EXPECT_EQ(-inf, sec_min * static_cast<T>(2)); \
527 EXPECT_EQ(-inf, (sec_min / static_cast<T>(2)) * static_cast<T>(3));
528
529 TEST_INF_MUL_WITH_TYPE(int64_t); // NOLINT(readability/function)
530 TEST_INF_MUL_WITH_TYPE(double); // NOLINT(readability/function)
531
532 #undef TEST_INF_MUL_WITH_TYPE
533
534 const double dbl_inf = std::numeric_limits<double>::infinity();
535 EXPECT_EQ(inf, inf * dbl_inf);
536 EXPECT_EQ(-inf, -inf * dbl_inf);
537 EXPECT_EQ(-inf, inf * -dbl_inf);
538 EXPECT_EQ(inf, -inf * -dbl_inf);
539
540 const absl::Duration any_dur = absl::Seconds(1);
541 EXPECT_EQ(inf, any_dur * dbl_inf);
542 EXPECT_EQ(-inf, -any_dur * dbl_inf);
543 EXPECT_EQ(-inf, any_dur * -dbl_inf);
544 EXPECT_EQ(inf, -any_dur * -dbl_inf);
545
546 // Fixed-point multiplication will produce a finite value, whereas floating
547 // point fuzziness will overflow to inf.
548 EXPECT_NE(absl::InfiniteDuration(), absl::Seconds(1) * kint64max);
549 EXPECT_EQ(inf, absl::Seconds(1) * static_cast<double>(kint64max));
550 EXPECT_NE(-absl::InfiniteDuration(), absl::Seconds(1) * kint64min);
551 EXPECT_EQ(-inf, absl::Seconds(1) * static_cast<double>(kint64min));
552
553 // Note that sec_max * or / by 1.0 overflows to inf due to the 53-bit
554 // limitations of double.
555 EXPECT_NE(inf, sec_max);
556 EXPECT_NE(inf, sec_max / 1);
557 EXPECT_EQ(inf, sec_max / 1.0);
558 EXPECT_NE(inf, sec_max * 1);
559 EXPECT_EQ(inf, sec_max * 1.0);
560 }
561
TEST(Duration,InfinityDivision)562 TEST(Duration, InfinityDivision) {
563 const absl::Duration sec_max = absl::Seconds(kint64max);
564 const absl::Duration sec_min = absl::Seconds(kint64min);
565 const absl::Duration inf = absl::InfiniteDuration();
566
567 // Division of Duration by a double
568 #define TEST_INF_DIV_WITH_TYPE(T) \
569 EXPECT_EQ(inf, inf / static_cast<T>(2)); \
570 EXPECT_EQ(-inf, inf / static_cast<T>(-2)); \
571 EXPECT_EQ(-inf, -inf / static_cast<T>(2)); \
572 EXPECT_EQ(inf, -inf / static_cast<T>(-2));
573
574 TEST_INF_DIV_WITH_TYPE(int64_t); // NOLINT(readability/function)
575 TEST_INF_DIV_WITH_TYPE(double); // NOLINT(readability/function)
576
577 #undef TEST_INF_DIV_WITH_TYPE
578
579 // Division of Duration by a double overflow/underflow
580 EXPECT_EQ(inf, sec_max / 0.5);
581 EXPECT_EQ(inf, sec_min / -0.5);
582 EXPECT_EQ(inf, ((sec_max / 0.5) + absl::Seconds(1)) / 0.5);
583 EXPECT_EQ(-inf, sec_max / -0.5);
584 EXPECT_EQ(-inf, sec_min / 0.5);
585 EXPECT_EQ(-inf, ((sec_min / 0.5) - absl::Seconds(1)) / 0.5);
586
587 const double dbl_inf = std::numeric_limits<double>::infinity();
588 EXPECT_EQ(inf, inf / dbl_inf);
589 EXPECT_EQ(-inf, inf / -dbl_inf);
590 EXPECT_EQ(-inf, -inf / dbl_inf);
591 EXPECT_EQ(inf, -inf / -dbl_inf);
592
593 const absl::Duration any_dur = absl::Seconds(1);
594 EXPECT_EQ(absl::ZeroDuration(), any_dur / dbl_inf);
595 EXPECT_EQ(absl::ZeroDuration(), any_dur / -dbl_inf);
596 EXPECT_EQ(absl::ZeroDuration(), -any_dur / dbl_inf);
597 EXPECT_EQ(absl::ZeroDuration(), -any_dur / -dbl_inf);
598 }
599
TEST(Duration,InfinityModulus)600 TEST(Duration, InfinityModulus) {
601 const absl::Duration sec_max = absl::Seconds(kint64max);
602 const absl::Duration any_dur = absl::Seconds(1);
603 const absl::Duration inf = absl::InfiniteDuration();
604
605 EXPECT_EQ(inf, inf % inf);
606 EXPECT_EQ(inf, inf % -inf);
607 EXPECT_EQ(-inf, -inf % -inf);
608 EXPECT_EQ(-inf, -inf % inf);
609
610 EXPECT_EQ(any_dur, any_dur % inf);
611 EXPECT_EQ(any_dur, any_dur % -inf);
612 EXPECT_EQ(-any_dur, -any_dur % inf);
613 EXPECT_EQ(-any_dur, -any_dur % -inf);
614
615 EXPECT_EQ(inf, inf % -any_dur);
616 EXPECT_EQ(inf, inf % any_dur);
617 EXPECT_EQ(-inf, -inf % -any_dur);
618 EXPECT_EQ(-inf, -inf % any_dur);
619
620 // Remainder isn't affected by overflow.
621 EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Seconds(1));
622 EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Milliseconds(1));
623 EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Microseconds(1));
624 EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Nanoseconds(1));
625 EXPECT_EQ(absl::ZeroDuration(), sec_max % absl::Nanoseconds(1) / 4);
626 }
627
TEST(Duration,InfinityIDiv)628 TEST(Duration, InfinityIDiv) {
629 const absl::Duration sec_max = absl::Seconds(kint64max);
630 const absl::Duration any_dur = absl::Seconds(1);
631 const absl::Duration inf = absl::InfiniteDuration();
632 const double dbl_inf = std::numeric_limits<double>::infinity();
633
634 // IDivDuration (int64_t return value + a remainer)
635 absl::Duration rem = absl::ZeroDuration();
636 EXPECT_EQ(kint64max, absl::IDivDuration(inf, inf, &rem));
637 EXPECT_EQ(inf, rem);
638
639 rem = absl::ZeroDuration();
640 EXPECT_EQ(kint64max, absl::IDivDuration(-inf, -inf, &rem));
641 EXPECT_EQ(-inf, rem);
642
643 rem = absl::ZeroDuration();
644 EXPECT_EQ(kint64max, absl::IDivDuration(inf, any_dur, &rem));
645 EXPECT_EQ(inf, rem);
646
647 rem = absl::ZeroDuration();
648 EXPECT_EQ(0, absl::IDivDuration(any_dur, inf, &rem));
649 EXPECT_EQ(any_dur, rem);
650
651 rem = absl::ZeroDuration();
652 EXPECT_EQ(kint64max, absl::IDivDuration(-inf, -any_dur, &rem));
653 EXPECT_EQ(-inf, rem);
654
655 rem = absl::ZeroDuration();
656 EXPECT_EQ(0, absl::IDivDuration(-any_dur, -inf, &rem));
657 EXPECT_EQ(-any_dur, rem);
658
659 rem = absl::ZeroDuration();
660 EXPECT_EQ(kint64min, absl::IDivDuration(-inf, inf, &rem));
661 EXPECT_EQ(-inf, rem);
662
663 rem = absl::ZeroDuration();
664 EXPECT_EQ(kint64min, absl::IDivDuration(inf, -inf, &rem));
665 EXPECT_EQ(inf, rem);
666
667 rem = absl::ZeroDuration();
668 EXPECT_EQ(kint64min, absl::IDivDuration(-inf, any_dur, &rem));
669 EXPECT_EQ(-inf, rem);
670
671 rem = absl::ZeroDuration();
672 EXPECT_EQ(0, absl::IDivDuration(-any_dur, inf, &rem));
673 EXPECT_EQ(-any_dur, rem);
674
675 rem = absl::ZeroDuration();
676 EXPECT_EQ(kint64min, absl::IDivDuration(inf, -any_dur, &rem));
677 EXPECT_EQ(inf, rem);
678
679 rem = absl::ZeroDuration();
680 EXPECT_EQ(0, absl::IDivDuration(any_dur, -inf, &rem));
681 EXPECT_EQ(any_dur, rem);
682
683 // IDivDuration overflow/underflow
684 rem = any_dur;
685 EXPECT_EQ(kint64max,
686 absl::IDivDuration(sec_max, absl::Nanoseconds(1) / 4, &rem));
687 EXPECT_EQ(sec_max - absl::Nanoseconds(kint64max) / 4, rem);
688
689 rem = any_dur;
690 EXPECT_EQ(kint64max,
691 absl::IDivDuration(sec_max, absl::Milliseconds(1), &rem));
692 EXPECT_EQ(sec_max - absl::Milliseconds(kint64max), rem);
693
694 rem = any_dur;
695 EXPECT_EQ(kint64max,
696 absl::IDivDuration(-sec_max, -absl::Milliseconds(1), &rem));
697 EXPECT_EQ(-sec_max + absl::Milliseconds(kint64max), rem);
698
699 rem = any_dur;
700 EXPECT_EQ(kint64min,
701 absl::IDivDuration(-sec_max, absl::Milliseconds(1), &rem));
702 EXPECT_EQ(-sec_max - absl::Milliseconds(kint64min), rem);
703
704 rem = any_dur;
705 EXPECT_EQ(kint64min,
706 absl::IDivDuration(sec_max, -absl::Milliseconds(1), &rem));
707 EXPECT_EQ(sec_max + absl::Milliseconds(kint64min), rem);
708
709 //
710 // operator/(Duration, Duration) is a wrapper for IDivDuration().
711 //
712
713 // IEEE 754 says inf / inf should be nan, but int64_t doesn't have
714 // nan so we'll return kint64max/kint64min instead.
715 EXPECT_TRUE(std::isnan(dbl_inf / dbl_inf));
716 EXPECT_EQ(kint64max, inf / inf);
717 EXPECT_EQ(kint64max, -inf / -inf);
718 EXPECT_EQ(kint64min, -inf / inf);
719 EXPECT_EQ(kint64min, inf / -inf);
720
721 EXPECT_TRUE(std::isinf(dbl_inf / 2.0));
722 EXPECT_EQ(kint64max, inf / any_dur);
723 EXPECT_EQ(kint64max, -inf / -any_dur);
724 EXPECT_EQ(kint64min, -inf / any_dur);
725 EXPECT_EQ(kint64min, inf / -any_dur);
726
727 EXPECT_EQ(0.0, 2.0 / dbl_inf);
728 EXPECT_EQ(0, any_dur / inf);
729 EXPECT_EQ(0, any_dur / -inf);
730 EXPECT_EQ(0, -any_dur / inf);
731 EXPECT_EQ(0, -any_dur / -inf);
732 EXPECT_EQ(0, absl::ZeroDuration() / inf);
733
734 // Division of Duration by a Duration overflow/underflow
735 EXPECT_EQ(kint64max, sec_max / absl::Milliseconds(1));
736 EXPECT_EQ(kint64max, -sec_max / -absl::Milliseconds(1));
737 EXPECT_EQ(kint64min, -sec_max / absl::Milliseconds(1));
738 EXPECT_EQ(kint64min, sec_max / -absl::Milliseconds(1));
739 }
740
TEST(Duration,InfinityFDiv)741 TEST(Duration, InfinityFDiv) {
742 const absl::Duration any_dur = absl::Seconds(1);
743 const absl::Duration inf = absl::InfiniteDuration();
744 const double dbl_inf = std::numeric_limits<double>::infinity();
745
746 EXPECT_EQ(dbl_inf, absl::FDivDuration(inf, inf));
747 EXPECT_EQ(dbl_inf, absl::FDivDuration(-inf, -inf));
748 EXPECT_EQ(dbl_inf, absl::FDivDuration(inf, any_dur));
749 EXPECT_EQ(0.0, absl::FDivDuration(any_dur, inf));
750 EXPECT_EQ(dbl_inf, absl::FDivDuration(-inf, -any_dur));
751 EXPECT_EQ(0.0, absl::FDivDuration(-any_dur, -inf));
752
753 EXPECT_EQ(-dbl_inf, absl::FDivDuration(-inf, inf));
754 EXPECT_EQ(-dbl_inf, absl::FDivDuration(inf, -inf));
755 EXPECT_EQ(-dbl_inf, absl::FDivDuration(-inf, any_dur));
756 EXPECT_EQ(0.0, absl::FDivDuration(-any_dur, inf));
757 EXPECT_EQ(-dbl_inf, absl::FDivDuration(inf, -any_dur));
758 EXPECT_EQ(0.0, absl::FDivDuration(any_dur, -inf));
759 }
760
TEST(Duration,DivisionByZero)761 TEST(Duration, DivisionByZero) {
762 const absl::Duration zero = absl::ZeroDuration();
763 const absl::Duration inf = absl::InfiniteDuration();
764 const absl::Duration any_dur = absl::Seconds(1);
765 const double dbl_inf = std::numeric_limits<double>::infinity();
766 const double dbl_denorm = std::numeric_limits<double>::denorm_min();
767
768 // Operator/(Duration, double)
769 EXPECT_EQ(inf, zero / 0.0);
770 EXPECT_EQ(-inf, zero / -0.0);
771 EXPECT_EQ(inf, any_dur / 0.0);
772 EXPECT_EQ(-inf, any_dur / -0.0);
773 EXPECT_EQ(-inf, -any_dur / 0.0);
774 EXPECT_EQ(inf, -any_dur / -0.0);
775
776 // Tests dividing by a number very close to, but not quite zero.
777 EXPECT_EQ(zero, zero / dbl_denorm);
778 EXPECT_EQ(zero, zero / -dbl_denorm);
779 EXPECT_EQ(inf, any_dur / dbl_denorm);
780 EXPECT_EQ(-inf, any_dur / -dbl_denorm);
781 EXPECT_EQ(-inf, -any_dur / dbl_denorm);
782 EXPECT_EQ(inf, -any_dur / -dbl_denorm);
783
784 // IDiv
785 absl::Duration rem = zero;
786 EXPECT_EQ(kint64max, absl::IDivDuration(zero, zero, &rem));
787 EXPECT_EQ(inf, rem);
788
789 rem = zero;
790 EXPECT_EQ(kint64max, absl::IDivDuration(any_dur, zero, &rem));
791 EXPECT_EQ(inf, rem);
792
793 rem = zero;
794 EXPECT_EQ(kint64min, absl::IDivDuration(-any_dur, zero, &rem));
795 EXPECT_EQ(-inf, rem);
796
797 // Operator/(Duration, Duration)
798 EXPECT_EQ(kint64max, zero / zero);
799 EXPECT_EQ(kint64max, any_dur / zero);
800 EXPECT_EQ(kint64min, -any_dur / zero);
801
802 // FDiv
803 EXPECT_EQ(dbl_inf, absl::FDivDuration(zero, zero));
804 EXPECT_EQ(dbl_inf, absl::FDivDuration(any_dur, zero));
805 EXPECT_EQ(-dbl_inf, absl::FDivDuration(-any_dur, zero));
806 }
807
TEST(Duration,NaN)808 TEST(Duration, NaN) {
809 // Note that IEEE 754 does not define the behavior of a nan's sign when it is
810 // copied, so the code below allows for either + or - InfiniteDuration.
811 #define TEST_NAN_HANDLING(NAME, NAN) \
812 do { \
813 const auto inf = absl::InfiniteDuration(); \
814 auto x = NAME(NAN); \
815 EXPECT_TRUE(x == inf || x == -inf); \
816 auto y = NAME(42); \
817 y *= NAN; \
818 EXPECT_TRUE(y == inf || y == -inf); \
819 auto z = NAME(42); \
820 z /= NAN; \
821 EXPECT_TRUE(z == inf || z == -inf); \
822 } while (0)
823
824 const double nan = std::numeric_limits<double>::quiet_NaN();
825 TEST_NAN_HANDLING(absl::Nanoseconds, nan);
826 TEST_NAN_HANDLING(absl::Microseconds, nan);
827 TEST_NAN_HANDLING(absl::Milliseconds, nan);
828 TEST_NAN_HANDLING(absl::Seconds, nan);
829 TEST_NAN_HANDLING(absl::Minutes, nan);
830 TEST_NAN_HANDLING(absl::Hours, nan);
831
832 TEST_NAN_HANDLING(absl::Nanoseconds, -nan);
833 TEST_NAN_HANDLING(absl::Microseconds, -nan);
834 TEST_NAN_HANDLING(absl::Milliseconds, -nan);
835 TEST_NAN_HANDLING(absl::Seconds, -nan);
836 TEST_NAN_HANDLING(absl::Minutes, -nan);
837 TEST_NAN_HANDLING(absl::Hours, -nan);
838
839 #undef TEST_NAN_HANDLING
840 }
841
TEST(Duration,Range)842 TEST(Duration, Range) {
843 const absl::Duration range = ApproxYears(100 * 1e9);
844 const absl::Duration range_future = range;
845 const absl::Duration range_past = -range;
846
847 EXPECT_LT(range_future, absl::InfiniteDuration());
848 EXPECT_GT(range_past, -absl::InfiniteDuration());
849
850 const absl::Duration full_range = range_future - range_past;
851 EXPECT_GT(full_range, absl::ZeroDuration());
852 EXPECT_LT(full_range, absl::InfiniteDuration());
853
854 const absl::Duration neg_full_range = range_past - range_future;
855 EXPECT_LT(neg_full_range, absl::ZeroDuration());
856 EXPECT_GT(neg_full_range, -absl::InfiniteDuration());
857
858 EXPECT_LT(neg_full_range, full_range);
859 EXPECT_EQ(neg_full_range, -full_range);
860 }
861
TEST(Duration,RelationalOperators)862 TEST(Duration, RelationalOperators) {
863 #define TEST_REL_OPS(UNIT) \
864 static_assert(UNIT(2) == UNIT(2), ""); \
865 static_assert(UNIT(1) != UNIT(2), ""); \
866 static_assert(UNIT(1) < UNIT(2), ""); \
867 static_assert(UNIT(3) > UNIT(2), ""); \
868 static_assert(UNIT(1) <= UNIT(2), ""); \
869 static_assert(UNIT(2) <= UNIT(2), ""); \
870 static_assert(UNIT(3) >= UNIT(2), ""); \
871 static_assert(UNIT(2) >= UNIT(2), "");
872
873 TEST_REL_OPS(absl::Nanoseconds);
874 TEST_REL_OPS(absl::Microseconds);
875 TEST_REL_OPS(absl::Milliseconds);
876 TEST_REL_OPS(absl::Seconds);
877 TEST_REL_OPS(absl::Minutes);
878 TEST_REL_OPS(absl::Hours);
879
880 #undef TEST_REL_OPS
881 }
882
TEST(Duration,Addition)883 TEST(Duration, Addition) {
884 #define TEST_ADD_OPS(UNIT) \
885 do { \
886 EXPECT_EQ(UNIT(2), UNIT(1) + UNIT(1)); \
887 EXPECT_EQ(UNIT(1), UNIT(2) - UNIT(1)); \
888 EXPECT_EQ(UNIT(0), UNIT(2) - UNIT(2)); \
889 EXPECT_EQ(UNIT(-1), UNIT(1) - UNIT(2)); \
890 EXPECT_EQ(UNIT(-2), UNIT(0) - UNIT(2)); \
891 EXPECT_EQ(UNIT(-2), UNIT(1) - UNIT(3)); \
892 absl::Duration a = UNIT(1); \
893 a += UNIT(1); \
894 EXPECT_EQ(UNIT(2), a); \
895 a -= UNIT(1); \
896 EXPECT_EQ(UNIT(1), a); \
897 } while (0)
898
899 TEST_ADD_OPS(absl::Nanoseconds);
900 TEST_ADD_OPS(absl::Microseconds);
901 TEST_ADD_OPS(absl::Milliseconds);
902 TEST_ADD_OPS(absl::Seconds);
903 TEST_ADD_OPS(absl::Minutes);
904 TEST_ADD_OPS(absl::Hours);
905
906 #undef TEST_ADD_OPS
907
908 EXPECT_EQ(absl::Seconds(2), absl::Seconds(3) - 2 * absl::Milliseconds(500));
909 EXPECT_EQ(absl::Seconds(2) + absl::Milliseconds(500),
910 absl::Seconds(3) - absl::Milliseconds(500));
911
912 EXPECT_EQ(absl::Seconds(1) + absl::Milliseconds(998),
913 absl::Milliseconds(999) + absl::Milliseconds(999));
914
915 EXPECT_EQ(absl::Milliseconds(-1),
916 absl::Milliseconds(998) - absl::Milliseconds(999));
917
918 // Tests fractions of a nanoseconds. These are implementation details only.
919 EXPECT_GT(absl::Nanoseconds(1), absl::Nanoseconds(1) / 2);
920 EXPECT_EQ(absl::Nanoseconds(1),
921 absl::Nanoseconds(1) / 2 + absl::Nanoseconds(1) / 2);
922 EXPECT_GT(absl::Nanoseconds(1) / 4, absl::Nanoseconds(0));
923 EXPECT_EQ(absl::Nanoseconds(1) / 8, absl::Nanoseconds(0));
924
925 // Tests subtraction that will cause wrap around of the rep_lo_ bits.
926 absl::Duration d_7_5 = absl::Seconds(7) + absl::Milliseconds(500);
927 absl::Duration d_3_7 = absl::Seconds(3) + absl::Milliseconds(700);
928 absl::Duration ans_3_8 = absl::Seconds(3) + absl::Milliseconds(800);
929 EXPECT_EQ(ans_3_8, d_7_5 - d_3_7);
930
931 // Subtracting min_duration
932 absl::Duration min_dur = absl::Seconds(kint64min);
933 EXPECT_EQ(absl::Seconds(0), min_dur - min_dur);
934 EXPECT_EQ(absl::Seconds(kint64max), absl::Seconds(-1) - min_dur);
935 }
936
TEST(Duration,Negation)937 TEST(Duration, Negation) {
938 // By storing negations of various values in constexpr variables we
939 // verify that the initializers are constant expressions.
940 constexpr absl::Duration negated_zero_duration = -absl::ZeroDuration();
941 EXPECT_EQ(negated_zero_duration, absl::ZeroDuration());
942
943 constexpr absl::Duration negated_infinite_duration =
944 -absl::InfiniteDuration();
945 EXPECT_NE(negated_infinite_duration, absl::InfiniteDuration());
946 EXPECT_EQ(-negated_infinite_duration, absl::InfiniteDuration());
947
948 // The public APIs to check if a duration is infinite depend on using
949 // -InfiniteDuration(), but we're trying to test operator- here, so we
950 // need to use the lower-level internal query IsInfiniteDuration.
951 EXPECT_TRUE(
952 absl::time_internal::IsInfiniteDuration(negated_infinite_duration));
953
954 // The largest Duration is kint64max seconds and kTicksPerSecond - 1 ticks.
955 // Using the absl::time_internal::MakeDuration API is the cleanest way to
956 // construct that Duration.
957 constexpr absl::Duration max_duration = absl::time_internal::MakeDuration(
958 kint64max, absl::time_internal::kTicksPerSecond - 1);
959 constexpr absl::Duration negated_max_duration = -max_duration;
960 // The largest negatable value is one tick above the minimum representable;
961 // it's the negation of max_duration.
962 constexpr absl::Duration nearly_min_duration =
963 absl::time_internal::MakeDuration(kint64min, int64_t{1});
964 constexpr absl::Duration negated_nearly_min_duration = -nearly_min_duration;
965
966 EXPECT_EQ(negated_max_duration, nearly_min_duration);
967 EXPECT_EQ(negated_nearly_min_duration, max_duration);
968 EXPECT_EQ(-(-max_duration), max_duration);
969
970 constexpr absl::Duration min_duration =
971 absl::time_internal::MakeDuration(kint64min);
972 constexpr absl::Duration negated_min_duration = -min_duration;
973 EXPECT_EQ(negated_min_duration, absl::InfiniteDuration());
974 }
975
TEST(Duration,AbsoluteValue)976 TEST(Duration, AbsoluteValue) {
977 EXPECT_EQ(absl::ZeroDuration(), AbsDuration(absl::ZeroDuration()));
978 EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(1)));
979 EXPECT_EQ(absl::Seconds(1), AbsDuration(absl::Seconds(-1)));
980
981 EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(absl::InfiniteDuration()));
982 EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(-absl::InfiniteDuration()));
983
984 absl::Duration max_dur =
985 absl::Seconds(kint64max) + (absl::Seconds(1) - absl::Nanoseconds(1) / 4);
986 EXPECT_EQ(max_dur, AbsDuration(max_dur));
987
988 absl::Duration min_dur = absl::Seconds(kint64min);
989 EXPECT_EQ(absl::InfiniteDuration(), AbsDuration(min_dur));
990 EXPECT_EQ(max_dur, AbsDuration(min_dur + absl::Nanoseconds(1) / 4));
991 }
992
TEST(Duration,Multiplication)993 TEST(Duration, Multiplication) {
994 #define TEST_MUL_OPS(UNIT) \
995 do { \
996 EXPECT_EQ(UNIT(5), UNIT(2) * 2.5); \
997 EXPECT_EQ(UNIT(2), UNIT(5) / 2.5); \
998 EXPECT_EQ(UNIT(-5), UNIT(-2) * 2.5); \
999 EXPECT_EQ(UNIT(-5), -UNIT(2) * 2.5); \
1000 EXPECT_EQ(UNIT(-5), UNIT(2) * -2.5); \
1001 EXPECT_EQ(UNIT(-2), UNIT(-5) / 2.5); \
1002 EXPECT_EQ(UNIT(-2), -UNIT(5) / 2.5); \
1003 EXPECT_EQ(UNIT(-2), UNIT(5) / -2.5); \
1004 EXPECT_EQ(UNIT(2), UNIT(11) % UNIT(3)); \
1005 absl::Duration a = UNIT(2); \
1006 a *= 2.5; \
1007 EXPECT_EQ(UNIT(5), a); \
1008 a /= 2.5; \
1009 EXPECT_EQ(UNIT(2), a); \
1010 a %= UNIT(1); \
1011 EXPECT_EQ(UNIT(0), a); \
1012 absl::Duration big = UNIT(1000000000); \
1013 big *= 3; \
1014 big /= 3; \
1015 EXPECT_EQ(UNIT(1000000000), big); \
1016 EXPECT_EQ(-UNIT(2), -UNIT(2)); \
1017 EXPECT_EQ(-UNIT(2), UNIT(2) * -1); \
1018 EXPECT_EQ(-UNIT(2), -1 * UNIT(2)); \
1019 EXPECT_EQ(-UNIT(-2), UNIT(2)); \
1020 EXPECT_EQ(2, UNIT(2) / UNIT(1)); \
1021 absl::Duration rem; \
1022 EXPECT_EQ(2, absl::IDivDuration(UNIT(2), UNIT(1), &rem)); \
1023 EXPECT_EQ(2.0, absl::FDivDuration(UNIT(2), UNIT(1))); \
1024 } while (0)
1025
1026 TEST_MUL_OPS(absl::Nanoseconds);
1027 TEST_MUL_OPS(absl::Microseconds);
1028 TEST_MUL_OPS(absl::Milliseconds);
1029 TEST_MUL_OPS(absl::Seconds);
1030 TEST_MUL_OPS(absl::Minutes);
1031 TEST_MUL_OPS(absl::Hours);
1032
1033 #undef TEST_MUL_OPS
1034
1035 // Ensures that multiplication and division by 1 with a maxed-out durations
1036 // doesn't lose precision.
1037 absl::Duration max_dur =
1038 absl::Seconds(kint64max) + (absl::Seconds(1) - absl::Nanoseconds(1) / 4);
1039 absl::Duration min_dur = absl::Seconds(kint64min);
1040 EXPECT_EQ(max_dur, max_dur * 1);
1041 EXPECT_EQ(max_dur, max_dur / 1);
1042 EXPECT_EQ(min_dur, min_dur * 1);
1043 EXPECT_EQ(min_dur, min_dur / 1);
1044
1045 // Tests division on a Duration with a large number of significant digits.
1046 // Tests when the digits span hi and lo as well as only in hi.
1047 absl::Duration sigfigs = absl::Seconds(2000000000) + absl::Nanoseconds(3);
1048 EXPECT_EQ(absl::Seconds(666666666) + absl::Nanoseconds(666666667) +
1049 absl::Nanoseconds(1) / 2,
1050 sigfigs / 3);
1051 sigfigs = absl::Seconds(int64_t{7000000000});
1052 EXPECT_EQ(absl::Seconds(2333333333) + absl::Nanoseconds(333333333) +
1053 absl::Nanoseconds(1) / 4,
1054 sigfigs / 3);
1055
1056 EXPECT_EQ(absl::Seconds(7) + absl::Milliseconds(500), absl::Seconds(3) * 2.5);
1057 EXPECT_EQ(absl::Seconds(8) * -1 + absl::Milliseconds(300),
1058 (absl::Seconds(2) + absl::Milliseconds(200)) * -3.5);
1059 EXPECT_EQ(-absl::Seconds(8) + absl::Milliseconds(300),
1060 (absl::Seconds(2) + absl::Milliseconds(200)) * -3.5);
1061 EXPECT_EQ(absl::Seconds(1) + absl::Milliseconds(875),
1062 (absl::Seconds(7) + absl::Milliseconds(500)) / 4);
1063 EXPECT_EQ(absl::Seconds(30),
1064 (absl::Seconds(7) + absl::Milliseconds(500)) / 0.25);
1065 EXPECT_EQ(absl::Seconds(3),
1066 (absl::Seconds(7) + absl::Milliseconds(500)) / 2.5);
1067
1068 // Tests division remainder.
1069 EXPECT_EQ(absl::Nanoseconds(0), absl::Nanoseconds(7) % absl::Nanoseconds(1));
1070 EXPECT_EQ(absl::Nanoseconds(0), absl::Nanoseconds(0) % absl::Nanoseconds(10));
1071 EXPECT_EQ(absl::Nanoseconds(2), absl::Nanoseconds(7) % absl::Nanoseconds(5));
1072 EXPECT_EQ(absl::Nanoseconds(2), absl::Nanoseconds(2) % absl::Nanoseconds(5));
1073
1074 EXPECT_EQ(absl::Nanoseconds(1), absl::Nanoseconds(10) % absl::Nanoseconds(3));
1075 EXPECT_EQ(absl::Nanoseconds(1),
1076 absl::Nanoseconds(10) % absl::Nanoseconds(-3));
1077 EXPECT_EQ(absl::Nanoseconds(-1),
1078 absl::Nanoseconds(-10) % absl::Nanoseconds(3));
1079 EXPECT_EQ(absl::Nanoseconds(-1),
1080 absl::Nanoseconds(-10) % absl::Nanoseconds(-3));
1081
1082 EXPECT_EQ(absl::Milliseconds(100),
1083 absl::Seconds(1) % absl::Milliseconds(300));
1084 EXPECT_EQ(
1085 absl::Milliseconds(300),
1086 (absl::Seconds(3) + absl::Milliseconds(800)) % absl::Milliseconds(500));
1087
1088 EXPECT_EQ(absl::Nanoseconds(1), absl::Nanoseconds(1) % absl::Seconds(1));
1089 EXPECT_EQ(absl::Nanoseconds(-1), absl::Nanoseconds(-1) % absl::Seconds(1));
1090 EXPECT_EQ(0, absl::Nanoseconds(-1) / absl::Seconds(1)); // Actual -1e-9
1091
1092 // Tests identity a = (a/b)*b + a%b
1093 #define TEST_MOD_IDENTITY(a, b) \
1094 EXPECT_EQ((a), ((a) / (b))*(b) + ((a)%(b)))
1095
1096 TEST_MOD_IDENTITY(absl::Seconds(0), absl::Seconds(2));
1097 TEST_MOD_IDENTITY(absl::Seconds(1), absl::Seconds(1));
1098 TEST_MOD_IDENTITY(absl::Seconds(1), absl::Seconds(2));
1099 TEST_MOD_IDENTITY(absl::Seconds(2), absl::Seconds(1));
1100
1101 TEST_MOD_IDENTITY(absl::Seconds(-2), absl::Seconds(1));
1102 TEST_MOD_IDENTITY(absl::Seconds(2), absl::Seconds(-1));
1103 TEST_MOD_IDENTITY(absl::Seconds(-2), absl::Seconds(-1));
1104
1105 TEST_MOD_IDENTITY(absl::Nanoseconds(0), absl::Nanoseconds(2));
1106 TEST_MOD_IDENTITY(absl::Nanoseconds(1), absl::Nanoseconds(1));
1107 TEST_MOD_IDENTITY(absl::Nanoseconds(1), absl::Nanoseconds(2));
1108 TEST_MOD_IDENTITY(absl::Nanoseconds(2), absl::Nanoseconds(1));
1109
1110 TEST_MOD_IDENTITY(absl::Nanoseconds(-2), absl::Nanoseconds(1));
1111 TEST_MOD_IDENTITY(absl::Nanoseconds(2), absl::Nanoseconds(-1));
1112 TEST_MOD_IDENTITY(absl::Nanoseconds(-2), absl::Nanoseconds(-1));
1113
1114 // Mixed seconds + subseconds
1115 absl::Duration mixed_a = absl::Seconds(1) + absl::Nanoseconds(2);
1116 absl::Duration mixed_b = absl::Seconds(1) + absl::Nanoseconds(3);
1117
1118 TEST_MOD_IDENTITY(absl::Seconds(0), mixed_a);
1119 TEST_MOD_IDENTITY(mixed_a, mixed_a);
1120 TEST_MOD_IDENTITY(mixed_a, mixed_b);
1121 TEST_MOD_IDENTITY(mixed_b, mixed_a);
1122
1123 TEST_MOD_IDENTITY(-mixed_a, mixed_b);
1124 TEST_MOD_IDENTITY(mixed_a, -mixed_b);
1125 TEST_MOD_IDENTITY(-mixed_a, -mixed_b);
1126
1127 #undef TEST_MOD_IDENTITY
1128 }
1129
TEST(Duration,Truncation)1130 TEST(Duration, Truncation) {
1131 const absl::Duration d = absl::Nanoseconds(1234567890);
1132 const absl::Duration inf = absl::InfiniteDuration();
1133 for (int unit_sign : {1, -1}) { // sign shouldn't matter
1134 EXPECT_EQ(absl::Nanoseconds(1234567890),
1135 Trunc(d, unit_sign * absl::Nanoseconds(1)));
1136 EXPECT_EQ(absl::Microseconds(1234567),
1137 Trunc(d, unit_sign * absl::Microseconds(1)));
1138 EXPECT_EQ(absl::Milliseconds(1234),
1139 Trunc(d, unit_sign * absl::Milliseconds(1)));
1140 EXPECT_EQ(absl::Seconds(1), Trunc(d, unit_sign * absl::Seconds(1)));
1141 EXPECT_EQ(inf, Trunc(inf, unit_sign * absl::Seconds(1)));
1142
1143 EXPECT_EQ(absl::Nanoseconds(-1234567890),
1144 Trunc(-d, unit_sign * absl::Nanoseconds(1)));
1145 EXPECT_EQ(absl::Microseconds(-1234567),
1146 Trunc(-d, unit_sign * absl::Microseconds(1)));
1147 EXPECT_EQ(absl::Milliseconds(-1234),
1148 Trunc(-d, unit_sign * absl::Milliseconds(1)));
1149 EXPECT_EQ(absl::Seconds(-1), Trunc(-d, unit_sign * absl::Seconds(1)));
1150 EXPECT_EQ(-inf, Trunc(-inf, unit_sign * absl::Seconds(1)));
1151 }
1152 }
1153
TEST(Duration,Flooring)1154 TEST(Duration, Flooring) {
1155 const absl::Duration d = absl::Nanoseconds(1234567890);
1156 const absl::Duration inf = absl::InfiniteDuration();
1157 for (int unit_sign : {1, -1}) { // sign shouldn't matter
1158 EXPECT_EQ(absl::Nanoseconds(1234567890),
1159 absl::Floor(d, unit_sign * absl::Nanoseconds(1)));
1160 EXPECT_EQ(absl::Microseconds(1234567),
1161 absl::Floor(d, unit_sign * absl::Microseconds(1)));
1162 EXPECT_EQ(absl::Milliseconds(1234),
1163 absl::Floor(d, unit_sign * absl::Milliseconds(1)));
1164 EXPECT_EQ(absl::Seconds(1), absl::Floor(d, unit_sign * absl::Seconds(1)));
1165 EXPECT_EQ(inf, absl::Floor(inf, unit_sign * absl::Seconds(1)));
1166
1167 EXPECT_EQ(absl::Nanoseconds(-1234567890),
1168 absl::Floor(-d, unit_sign * absl::Nanoseconds(1)));
1169 EXPECT_EQ(absl::Microseconds(-1234568),
1170 absl::Floor(-d, unit_sign * absl::Microseconds(1)));
1171 EXPECT_EQ(absl::Milliseconds(-1235),
1172 absl::Floor(-d, unit_sign * absl::Milliseconds(1)));
1173 EXPECT_EQ(absl::Seconds(-2), absl::Floor(-d, unit_sign * absl::Seconds(1)));
1174 EXPECT_EQ(-inf, absl::Floor(-inf, unit_sign * absl::Seconds(1)));
1175 }
1176 }
1177
TEST(Duration,Ceiling)1178 TEST(Duration, Ceiling) {
1179 const absl::Duration d = absl::Nanoseconds(1234567890);
1180 const absl::Duration inf = absl::InfiniteDuration();
1181 for (int unit_sign : {1, -1}) { // // sign shouldn't matter
1182 EXPECT_EQ(absl::Nanoseconds(1234567890),
1183 absl::Ceil(d, unit_sign * absl::Nanoseconds(1)));
1184 EXPECT_EQ(absl::Microseconds(1234568),
1185 absl::Ceil(d, unit_sign * absl::Microseconds(1)));
1186 EXPECT_EQ(absl::Milliseconds(1235),
1187 absl::Ceil(d, unit_sign * absl::Milliseconds(1)));
1188 EXPECT_EQ(absl::Seconds(2), absl::Ceil(d, unit_sign * absl::Seconds(1)));
1189 EXPECT_EQ(inf, absl::Ceil(inf, unit_sign * absl::Seconds(1)));
1190
1191 EXPECT_EQ(absl::Nanoseconds(-1234567890),
1192 absl::Ceil(-d, unit_sign * absl::Nanoseconds(1)));
1193 EXPECT_EQ(absl::Microseconds(-1234567),
1194 absl::Ceil(-d, unit_sign * absl::Microseconds(1)));
1195 EXPECT_EQ(absl::Milliseconds(-1234),
1196 absl::Ceil(-d, unit_sign * absl::Milliseconds(1)));
1197 EXPECT_EQ(absl::Seconds(-1), absl::Ceil(-d, unit_sign * absl::Seconds(1)));
1198 EXPECT_EQ(-inf, absl::Ceil(-inf, unit_sign * absl::Seconds(1)));
1199 }
1200 }
1201
TEST(Duration,RoundTripUnits)1202 TEST(Duration, RoundTripUnits) {
1203 const int kRange = 100000;
1204
1205 #define ROUND_TRIP_UNIT(U, LOW, HIGH) \
1206 do { \
1207 for (int64_t i = LOW; i < HIGH; ++i) { \
1208 absl::Duration d = absl::U(i); \
1209 if (d == absl::InfiniteDuration()) \
1210 EXPECT_EQ(kint64max, d / absl::U(1)); \
1211 else if (d == -absl::InfiniteDuration()) \
1212 EXPECT_EQ(kint64min, d / absl::U(1)); \
1213 else \
1214 EXPECT_EQ(i, absl::U(i) / absl::U(1)); \
1215 } \
1216 } while (0)
1217
1218 ROUND_TRIP_UNIT(Nanoseconds, kint64min, kint64min + kRange);
1219 ROUND_TRIP_UNIT(Nanoseconds, -kRange, kRange);
1220 ROUND_TRIP_UNIT(Nanoseconds, kint64max - kRange, kint64max);
1221
1222 ROUND_TRIP_UNIT(Microseconds, kint64min, kint64min + kRange);
1223 ROUND_TRIP_UNIT(Microseconds, -kRange, kRange);
1224 ROUND_TRIP_UNIT(Microseconds, kint64max - kRange, kint64max);
1225
1226 ROUND_TRIP_UNIT(Milliseconds, kint64min, kint64min + kRange);
1227 ROUND_TRIP_UNIT(Milliseconds, -kRange, kRange);
1228 ROUND_TRIP_UNIT(Milliseconds, kint64max - kRange, kint64max);
1229
1230 ROUND_TRIP_UNIT(Seconds, kint64min, kint64min + kRange);
1231 ROUND_TRIP_UNIT(Seconds, -kRange, kRange);
1232 ROUND_TRIP_UNIT(Seconds, kint64max - kRange, kint64max);
1233
1234 ROUND_TRIP_UNIT(Minutes, kint64min / 60, kint64min / 60 + kRange);
1235 ROUND_TRIP_UNIT(Minutes, -kRange, kRange);
1236 ROUND_TRIP_UNIT(Minutes, kint64max / 60 - kRange, kint64max / 60);
1237
1238 ROUND_TRIP_UNIT(Hours, kint64min / 3600, kint64min / 3600 + kRange);
1239 ROUND_TRIP_UNIT(Hours, -kRange, kRange);
1240 ROUND_TRIP_UNIT(Hours, kint64max / 3600 - kRange, kint64max / 3600);
1241
1242 #undef ROUND_TRIP_UNIT
1243 }
1244
TEST(Duration,TruncConversions)1245 TEST(Duration, TruncConversions) {
1246 // Tests ToTimespec()/DurationFromTimespec()
1247 const struct {
1248 absl::Duration d;
1249 timespec ts;
1250 } to_ts[] = {
1251 {absl::Seconds(1) + absl::Nanoseconds(1), {1, 1}},
1252 {absl::Seconds(1) + absl::Nanoseconds(1) / 2, {1, 0}},
1253 {absl::Seconds(1) + absl::Nanoseconds(0), {1, 0}},
1254 {absl::Seconds(0) + absl::Nanoseconds(0), {0, 0}},
1255 {absl::Seconds(0) - absl::Nanoseconds(1) / 2, {0, 0}},
1256 {absl::Seconds(0) - absl::Nanoseconds(1), {-1, 999999999}},
1257 {absl::Seconds(-1) + absl::Nanoseconds(1), {-1, 1}},
1258 {absl::Seconds(-1) + absl::Nanoseconds(1) / 2, {-1, 1}},
1259 {absl::Seconds(-1) + absl::Nanoseconds(0), {-1, 0}},
1260 {absl::Seconds(-1) - absl::Nanoseconds(1) / 2, {-1, 0}},
1261 };
1262 for (const auto& test : to_ts) {
1263 EXPECT_THAT(absl::ToTimespec(test.d), TimespecMatcher(test.ts));
1264 }
1265 const struct {
1266 timespec ts;
1267 absl::Duration d;
1268 } from_ts[] = {
1269 {{1, 1}, absl::Seconds(1) + absl::Nanoseconds(1)},
1270 {{1, 0}, absl::Seconds(1) + absl::Nanoseconds(0)},
1271 {{0, 0}, absl::Seconds(0) + absl::Nanoseconds(0)},
1272 {{0, -1}, absl::Seconds(0) - absl::Nanoseconds(1)},
1273 {{-1, 999999999}, absl::Seconds(0) - absl::Nanoseconds(1)},
1274 {{-1, 1}, absl::Seconds(-1) + absl::Nanoseconds(1)},
1275 {{-1, 0}, absl::Seconds(-1) + absl::Nanoseconds(0)},
1276 {{-1, -1}, absl::Seconds(-1) - absl::Nanoseconds(1)},
1277 {{-2, 999999999}, absl::Seconds(-1) - absl::Nanoseconds(1)},
1278 };
1279 for (const auto& test : from_ts) {
1280 EXPECT_EQ(test.d, absl::DurationFromTimespec(test.ts));
1281 }
1282
1283 // Tests ToTimeval()/DurationFromTimeval() (same as timespec above)
1284 const struct {
1285 absl::Duration d;
1286 timeval tv;
1287 } to_tv[] = {
1288 {absl::Seconds(1) + absl::Microseconds(1), {1, 1}},
1289 {absl::Seconds(1) + absl::Microseconds(1) / 2, {1, 0}},
1290 {absl::Seconds(1) + absl::Microseconds(0), {1, 0}},
1291 {absl::Seconds(0) + absl::Microseconds(0), {0, 0}},
1292 {absl::Seconds(0) - absl::Microseconds(1) / 2, {0, 0}},
1293 {absl::Seconds(0) - absl::Microseconds(1), {-1, 999999}},
1294 {absl::Seconds(-1) + absl::Microseconds(1), {-1, 1}},
1295 {absl::Seconds(-1) + absl::Microseconds(1) / 2, {-1, 1}},
1296 {absl::Seconds(-1) + absl::Microseconds(0), {-1, 0}},
1297 {absl::Seconds(-1) - absl::Microseconds(1) / 2, {-1, 0}},
1298 };
1299 for (const auto& test : to_tv) {
1300 EXPECT_THAT(absl::ToTimeval(test.d), TimevalMatcher(test.tv));
1301 }
1302 const struct {
1303 timeval tv;
1304 absl::Duration d;
1305 } from_tv[] = {
1306 {{1, 1}, absl::Seconds(1) + absl::Microseconds(1)},
1307 {{1, 0}, absl::Seconds(1) + absl::Microseconds(0)},
1308 {{0, 0}, absl::Seconds(0) + absl::Microseconds(0)},
1309 {{0, -1}, absl::Seconds(0) - absl::Microseconds(1)},
1310 {{-1, 999999}, absl::Seconds(0) - absl::Microseconds(1)},
1311 {{-1, 1}, absl::Seconds(-1) + absl::Microseconds(1)},
1312 {{-1, 0}, absl::Seconds(-1) + absl::Microseconds(0)},
1313 {{-1, -1}, absl::Seconds(-1) - absl::Microseconds(1)},
1314 {{-2, 999999}, absl::Seconds(-1) - absl::Microseconds(1)},
1315 };
1316 for (const auto& test : from_tv) {
1317 EXPECT_EQ(test.d, absl::DurationFromTimeval(test.tv));
1318 }
1319 }
1320
TEST(Duration,SmallConversions)1321 TEST(Duration, SmallConversions) {
1322 // Special tests for conversions of small durations.
1323
1324 EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(0));
1325 // TODO(bww): Is the next one OK?
1326 EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(std::nextafter(0.125e-9, 0)));
1327 EXPECT_EQ(absl::Nanoseconds(1) / 4, absl::Seconds(0.125e-9));
1328 EXPECT_EQ(absl::Nanoseconds(1) / 4, absl::Seconds(0.250e-9));
1329 EXPECT_EQ(absl::Nanoseconds(1) / 2, absl::Seconds(0.375e-9));
1330 EXPECT_EQ(absl::Nanoseconds(1) / 2, absl::Seconds(0.500e-9));
1331 EXPECT_EQ(absl::Nanoseconds(3) / 4, absl::Seconds(0.625e-9));
1332 EXPECT_EQ(absl::Nanoseconds(3) / 4, absl::Seconds(0.750e-9));
1333 EXPECT_EQ(absl::Nanoseconds(1), absl::Seconds(0.875e-9));
1334 EXPECT_EQ(absl::Nanoseconds(1), absl::Seconds(1.000e-9));
1335
1336 EXPECT_EQ(absl::ZeroDuration(), absl::Seconds(std::nextafter(-0.125e-9, 0)));
1337 EXPECT_EQ(-absl::Nanoseconds(1) / 4, absl::Seconds(-0.125e-9));
1338 EXPECT_EQ(-absl::Nanoseconds(1) / 4, absl::Seconds(-0.250e-9));
1339 EXPECT_EQ(-absl::Nanoseconds(1) / 2, absl::Seconds(-0.375e-9));
1340 EXPECT_EQ(-absl::Nanoseconds(1) / 2, absl::Seconds(-0.500e-9));
1341 EXPECT_EQ(-absl::Nanoseconds(3) / 4, absl::Seconds(-0.625e-9));
1342 EXPECT_EQ(-absl::Nanoseconds(3) / 4, absl::Seconds(-0.750e-9));
1343 EXPECT_EQ(-absl::Nanoseconds(1), absl::Seconds(-0.875e-9));
1344 EXPECT_EQ(-absl::Nanoseconds(1), absl::Seconds(-1.000e-9));
1345
1346 timespec ts;
1347 ts.tv_sec = 0;
1348 ts.tv_nsec = 0;
1349 EXPECT_THAT(ToTimespec(absl::Nanoseconds(0)), TimespecMatcher(ts));
1350 // TODO(bww): Are the next three OK?
1351 EXPECT_THAT(ToTimespec(absl::Nanoseconds(1) / 4), TimespecMatcher(ts));
1352 EXPECT_THAT(ToTimespec(absl::Nanoseconds(2) / 4), TimespecMatcher(ts));
1353 EXPECT_THAT(ToTimespec(absl::Nanoseconds(3) / 4), TimespecMatcher(ts));
1354 ts.tv_nsec = 1;
1355 EXPECT_THAT(ToTimespec(absl::Nanoseconds(4) / 4), TimespecMatcher(ts));
1356 EXPECT_THAT(ToTimespec(absl::Nanoseconds(5) / 4), TimespecMatcher(ts));
1357 EXPECT_THAT(ToTimespec(absl::Nanoseconds(6) / 4), TimespecMatcher(ts));
1358 EXPECT_THAT(ToTimespec(absl::Nanoseconds(7) / 4), TimespecMatcher(ts));
1359 ts.tv_nsec = 2;
1360 EXPECT_THAT(ToTimespec(absl::Nanoseconds(8) / 4), TimespecMatcher(ts));
1361
1362 timeval tv;
1363 tv.tv_sec = 0;
1364 tv.tv_usec = 0;
1365 EXPECT_THAT(ToTimeval(absl::Nanoseconds(0)), TimevalMatcher(tv));
1366 // TODO(bww): Is the next one OK?
1367 EXPECT_THAT(ToTimeval(absl::Nanoseconds(999)), TimevalMatcher(tv));
1368 tv.tv_usec = 1;
1369 EXPECT_THAT(ToTimeval(absl::Nanoseconds(1000)), TimevalMatcher(tv));
1370 EXPECT_THAT(ToTimeval(absl::Nanoseconds(1999)), TimevalMatcher(tv));
1371 tv.tv_usec = 2;
1372 EXPECT_THAT(ToTimeval(absl::Nanoseconds(2000)), TimevalMatcher(tv));
1373 }
1374
VerifyApproxSameAsMul(double time_as_seconds,int * const misses)1375 void VerifyApproxSameAsMul(double time_as_seconds, int* const misses) {
1376 auto direct_seconds = absl::Seconds(time_as_seconds);
1377 auto mul_by_one_second = time_as_seconds * absl::Seconds(1);
1378 // These are expected to differ by up to one tick due to fused multiply/add
1379 // contraction.
1380 if (absl::AbsDuration(direct_seconds - mul_by_one_second) >
1381 absl::time_internal::MakeDuration(0, 1u)) {
1382 if (*misses > 10) return;
1383 ASSERT_LE(++(*misses), 10) << "Too many errors, not reporting more.";
1384 EXPECT_EQ(direct_seconds, mul_by_one_second)
1385 << "given double time_as_seconds = " << std::setprecision(17)
1386 << time_as_seconds;
1387 }
1388 }
1389
1390 // For a variety of interesting durations, we find the exact point
1391 // where one double converts to that duration, and the very next double
1392 // converts to the next duration. For both of those points, verify that
1393 // Seconds(point) returns a duration near point * Seconds(1.0). (They may
1394 // not be exactly equal due to fused multiply/add contraction.)
TEST(Duration,ToDoubleSecondsCheckEdgeCases)1395 TEST(Duration, ToDoubleSecondsCheckEdgeCases) {
1396 #if (defined(__i386__) || defined(_M_IX86)) && FLT_EVAL_METHOD != 0
1397 // We're using an x87-compatible FPU, and intermediate operations can be
1398 // performed with 80-bit floats. This means the edge cases are different than
1399 // what we expect here, so just skip this test.
1400 GTEST_SKIP()
1401 << "Skipping the test because we detected x87 floating-point semantics";
1402 #endif
1403
1404 constexpr uint32_t kTicksPerSecond = absl::time_internal::kTicksPerSecond;
1405 constexpr auto duration_tick = absl::time_internal::MakeDuration(0, 1u);
1406 int misses = 0;
1407 for (int64_t seconds = 0; seconds < 99; ++seconds) {
1408 uint32_t tick_vals[] = {0, +999, +999999, +999999999, kTicksPerSecond - 1,
1409 0, 1000, 1000000, 1000000000, kTicksPerSecond,
1410 1, 1001, 1000001, 1000000001, kTicksPerSecond + 1,
1411 2, 1002, 1000002, 1000000002, kTicksPerSecond + 2,
1412 3, 1003, 1000003, 1000000003, kTicksPerSecond + 3,
1413 4, 1004, 1000004, 1000000004, kTicksPerSecond + 4,
1414 5, 6, 7, 8, 9};
1415 for (uint32_t ticks : tick_vals) {
1416 absl::Duration s_plus_t = absl::Seconds(seconds) + ticks * duration_tick;
1417 for (absl::Duration d : {s_plus_t, -s_plus_t}) {
1418 absl::Duration after_d = d + duration_tick;
1419 EXPECT_NE(d, after_d);
1420 EXPECT_EQ(after_d - d, duration_tick);
1421
1422 double low_edge = ToDoubleSeconds(d);
1423 EXPECT_EQ(d, absl::Seconds(low_edge));
1424
1425 double high_edge = ToDoubleSeconds(after_d);
1426 EXPECT_EQ(after_d, absl::Seconds(high_edge));
1427
1428 for (;;) {
1429 double midpoint = low_edge + (high_edge - low_edge) / 2;
1430 if (midpoint == low_edge || midpoint == high_edge) break;
1431 absl::Duration mid_duration = absl::Seconds(midpoint);
1432 if (mid_duration == d) {
1433 low_edge = midpoint;
1434 } else {
1435 EXPECT_EQ(mid_duration, after_d);
1436 high_edge = midpoint;
1437 }
1438 }
1439 // Now low_edge is the highest double that converts to Duration d,
1440 // and high_edge is the lowest double that converts to Duration after_d.
1441 VerifyApproxSameAsMul(low_edge, &misses);
1442 VerifyApproxSameAsMul(high_edge, &misses);
1443 }
1444 }
1445 }
1446 }
1447
TEST(Duration,ToDoubleSecondsCheckRandom)1448 TEST(Duration, ToDoubleSecondsCheckRandom) {
1449 std::random_device rd;
1450 std::seed_seq seed({rd(), rd(), rd(), rd(), rd(), rd(), rd(), rd()});
1451 std::mt19937_64 gen(seed);
1452 // We want doubles distributed from 1/8ns up to 2^63, where
1453 // as many values are tested from 1ns to 2ns as from 1sec to 2sec,
1454 // so even distribute along a log-scale of those values, and
1455 // exponentiate before using them. (9.223377e+18 is just slightly
1456 // out of bounds for absl::Duration.)
1457 std::uniform_real_distribution<double> uniform(std::log(0.125e-9),
1458 std::log(9.223377e+18));
1459 int misses = 0;
1460 for (int i = 0; i < 1000000; ++i) {
1461 double d = std::exp(uniform(gen));
1462 VerifyApproxSameAsMul(d, &misses);
1463 VerifyApproxSameAsMul(-d, &misses);
1464 }
1465 }
1466
TEST(Duration,ConversionSaturation)1467 TEST(Duration, ConversionSaturation) {
1468 absl::Duration d;
1469
1470 const auto max_timeval_sec =
1471 std::numeric_limits<decltype(timeval::tv_sec)>::max();
1472 const auto min_timeval_sec =
1473 std::numeric_limits<decltype(timeval::tv_sec)>::min();
1474 timeval tv;
1475 tv.tv_sec = max_timeval_sec;
1476 tv.tv_usec = 999998;
1477 d = absl::DurationFromTimeval(tv);
1478 tv = ToTimeval(d);
1479 EXPECT_EQ(max_timeval_sec, tv.tv_sec);
1480 EXPECT_EQ(999998, tv.tv_usec);
1481 d += absl::Microseconds(1);
1482 tv = ToTimeval(d);
1483 EXPECT_EQ(max_timeval_sec, tv.tv_sec);
1484 EXPECT_EQ(999999, tv.tv_usec);
1485 d += absl::Microseconds(1); // no effect
1486 tv = ToTimeval(d);
1487 EXPECT_EQ(max_timeval_sec, tv.tv_sec);
1488 EXPECT_EQ(999999, tv.tv_usec);
1489
1490 tv.tv_sec = min_timeval_sec;
1491 tv.tv_usec = 1;
1492 d = absl::DurationFromTimeval(tv);
1493 tv = ToTimeval(d);
1494 EXPECT_EQ(min_timeval_sec, tv.tv_sec);
1495 EXPECT_EQ(1, tv.tv_usec);
1496 d -= absl::Microseconds(1);
1497 tv = ToTimeval(d);
1498 EXPECT_EQ(min_timeval_sec, tv.tv_sec);
1499 EXPECT_EQ(0, tv.tv_usec);
1500 d -= absl::Microseconds(1); // no effect
1501 tv = ToTimeval(d);
1502 EXPECT_EQ(min_timeval_sec, tv.tv_sec);
1503 EXPECT_EQ(0, tv.tv_usec);
1504
1505 const auto max_timespec_sec =
1506 std::numeric_limits<decltype(timespec::tv_sec)>::max();
1507 const auto min_timespec_sec =
1508 std::numeric_limits<decltype(timespec::tv_sec)>::min();
1509 timespec ts;
1510 ts.tv_sec = max_timespec_sec;
1511 ts.tv_nsec = 999999998;
1512 d = absl::DurationFromTimespec(ts);
1513 ts = absl::ToTimespec(d);
1514 EXPECT_EQ(max_timespec_sec, ts.tv_sec);
1515 EXPECT_EQ(999999998, ts.tv_nsec);
1516 d += absl::Nanoseconds(1);
1517 ts = absl::ToTimespec(d);
1518 EXPECT_EQ(max_timespec_sec, ts.tv_sec);
1519 EXPECT_EQ(999999999, ts.tv_nsec);
1520 d += absl::Nanoseconds(1); // no effect
1521 ts = absl::ToTimespec(d);
1522 EXPECT_EQ(max_timespec_sec, ts.tv_sec);
1523 EXPECT_EQ(999999999, ts.tv_nsec);
1524
1525 ts.tv_sec = min_timespec_sec;
1526 ts.tv_nsec = 1;
1527 d = absl::DurationFromTimespec(ts);
1528 ts = absl::ToTimespec(d);
1529 EXPECT_EQ(min_timespec_sec, ts.tv_sec);
1530 EXPECT_EQ(1, ts.tv_nsec);
1531 d -= absl::Nanoseconds(1);
1532 ts = absl::ToTimespec(d);
1533 EXPECT_EQ(min_timespec_sec, ts.tv_sec);
1534 EXPECT_EQ(0, ts.tv_nsec);
1535 d -= absl::Nanoseconds(1); // no effect
1536 ts = absl::ToTimespec(d);
1537 EXPECT_EQ(min_timespec_sec, ts.tv_sec);
1538 EXPECT_EQ(0, ts.tv_nsec);
1539 }
1540
TEST(Duration,FormatDuration)1541 TEST(Duration, FormatDuration) {
1542 // Example from Go's docs.
1543 EXPECT_EQ("72h3m0.5s",
1544 absl::FormatDuration(absl::Hours(72) + absl::Minutes(3) +
1545 absl::Milliseconds(500)));
1546 // Go's largest time: 2540400h10m10.000000000s
1547 EXPECT_EQ("2540400h10m10s",
1548 absl::FormatDuration(absl::Hours(2540400) + absl::Minutes(10) +
1549 absl::Seconds(10)));
1550
1551 EXPECT_EQ("0", absl::FormatDuration(absl::ZeroDuration()));
1552 EXPECT_EQ("0", absl::FormatDuration(absl::Seconds(0)));
1553 EXPECT_EQ("0", absl::FormatDuration(absl::Nanoseconds(0)));
1554
1555 EXPECT_EQ("1ns", absl::FormatDuration(absl::Nanoseconds(1)));
1556 EXPECT_EQ("1us", absl::FormatDuration(absl::Microseconds(1)));
1557 EXPECT_EQ("1ms", absl::FormatDuration(absl::Milliseconds(1)));
1558 EXPECT_EQ("1s", absl::FormatDuration(absl::Seconds(1)));
1559 EXPECT_EQ("1m", absl::FormatDuration(absl::Minutes(1)));
1560 EXPECT_EQ("1h", absl::FormatDuration(absl::Hours(1)));
1561
1562 EXPECT_EQ("1h1m", absl::FormatDuration(absl::Hours(1) + absl::Minutes(1)));
1563 EXPECT_EQ("1h1s", absl::FormatDuration(absl::Hours(1) + absl::Seconds(1)));
1564 EXPECT_EQ("1m1s", absl::FormatDuration(absl::Minutes(1) + absl::Seconds(1)));
1565
1566 EXPECT_EQ("1h0.25s",
1567 absl::FormatDuration(absl::Hours(1) + absl::Milliseconds(250)));
1568 EXPECT_EQ("1m0.25s",
1569 absl::FormatDuration(absl::Minutes(1) + absl::Milliseconds(250)));
1570 EXPECT_EQ("1h1m0.25s",
1571 absl::FormatDuration(absl::Hours(1) + absl::Minutes(1) +
1572 absl::Milliseconds(250)));
1573 EXPECT_EQ("1h0.0005s",
1574 absl::FormatDuration(absl::Hours(1) + absl::Microseconds(500)));
1575 EXPECT_EQ("1h0.0000005s",
1576 absl::FormatDuration(absl::Hours(1) + absl::Nanoseconds(500)));
1577
1578 // Subsecond special case.
1579 EXPECT_EQ("1.5ns", absl::FormatDuration(absl::Nanoseconds(1) +
1580 absl::Nanoseconds(1) / 2));
1581 EXPECT_EQ("1.25ns", absl::FormatDuration(absl::Nanoseconds(1) +
1582 absl::Nanoseconds(1) / 4));
1583 EXPECT_EQ("1ns", absl::FormatDuration(absl::Nanoseconds(1) +
1584 absl::Nanoseconds(1) / 9));
1585 EXPECT_EQ("1.2us", absl::FormatDuration(absl::Microseconds(1) +
1586 absl::Nanoseconds(200)));
1587 EXPECT_EQ("1.2ms", absl::FormatDuration(absl::Milliseconds(1) +
1588 absl::Microseconds(200)));
1589 EXPECT_EQ("1.0002ms", absl::FormatDuration(absl::Milliseconds(1) +
1590 absl::Nanoseconds(200)));
1591 EXPECT_EQ("1.00001ms", absl::FormatDuration(absl::Milliseconds(1) +
1592 absl::Nanoseconds(10)));
1593 EXPECT_EQ("1.000001ms",
1594 absl::FormatDuration(absl::Milliseconds(1) + absl::Nanoseconds(1)));
1595
1596 // Negative durations.
1597 EXPECT_EQ("-1ns", absl::FormatDuration(absl::Nanoseconds(-1)));
1598 EXPECT_EQ("-1us", absl::FormatDuration(absl::Microseconds(-1)));
1599 EXPECT_EQ("-1ms", absl::FormatDuration(absl::Milliseconds(-1)));
1600 EXPECT_EQ("-1s", absl::FormatDuration(absl::Seconds(-1)));
1601 EXPECT_EQ("-1m", absl::FormatDuration(absl::Minutes(-1)));
1602 EXPECT_EQ("-1h", absl::FormatDuration(absl::Hours(-1)));
1603
1604 EXPECT_EQ("-1h1m",
1605 absl::FormatDuration(-(absl::Hours(1) + absl::Minutes(1))));
1606 EXPECT_EQ("-1h1s",
1607 absl::FormatDuration(-(absl::Hours(1) + absl::Seconds(1))));
1608 EXPECT_EQ("-1m1s",
1609 absl::FormatDuration(-(absl::Minutes(1) + absl::Seconds(1))));
1610
1611 EXPECT_EQ("-1ns", absl::FormatDuration(absl::Nanoseconds(-1)));
1612 EXPECT_EQ("-1.2us", absl::FormatDuration(
1613 -(absl::Microseconds(1) + absl::Nanoseconds(200))));
1614 EXPECT_EQ("-1.2ms", absl::FormatDuration(
1615 -(absl::Milliseconds(1) + absl::Microseconds(200))));
1616 EXPECT_EQ("-1.0002ms", absl::FormatDuration(-(absl::Milliseconds(1) +
1617 absl::Nanoseconds(200))));
1618 EXPECT_EQ("-1.00001ms", absl::FormatDuration(-(absl::Milliseconds(1) +
1619 absl::Nanoseconds(10))));
1620 EXPECT_EQ("-1.000001ms", absl::FormatDuration(-(absl::Milliseconds(1) +
1621 absl::Nanoseconds(1))));
1622
1623 //
1624 // Interesting corner cases.
1625 //
1626
1627 const absl::Duration qns = absl::Nanoseconds(1) / 4;
1628 const absl::Duration max_dur =
1629 absl::Seconds(kint64max) + (absl::Seconds(1) - qns);
1630 const absl::Duration min_dur = absl::Seconds(kint64min);
1631
1632 EXPECT_EQ("0.25ns", absl::FormatDuration(qns));
1633 EXPECT_EQ("-0.25ns", absl::FormatDuration(-qns));
1634 EXPECT_EQ("2562047788015215h30m7.99999999975s",
1635 absl::FormatDuration(max_dur));
1636 EXPECT_EQ("-2562047788015215h30m8s", absl::FormatDuration(min_dur));
1637
1638 // Tests printing full precision from units that print using FDivDuration
1639 EXPECT_EQ("55.00000000025s", absl::FormatDuration(absl::Seconds(55) + qns));
1640 EXPECT_EQ("55.00000025ms",
1641 absl::FormatDuration(absl::Milliseconds(55) + qns));
1642 EXPECT_EQ("55.00025us", absl::FormatDuration(absl::Microseconds(55) + qns));
1643 EXPECT_EQ("55.25ns", absl::FormatDuration(absl::Nanoseconds(55) + qns));
1644
1645 // Formatting infinity
1646 EXPECT_EQ("inf", absl::FormatDuration(absl::InfiniteDuration()));
1647 EXPECT_EQ("-inf", absl::FormatDuration(-absl::InfiniteDuration()));
1648
1649 // Formatting approximately +/- 100 billion years
1650 const absl::Duration huge_range = ApproxYears(100000000000);
1651 EXPECT_EQ("876000000000000h", absl::FormatDuration(huge_range));
1652 EXPECT_EQ("-876000000000000h", absl::FormatDuration(-huge_range));
1653
1654 EXPECT_EQ("876000000000000h0.999999999s",
1655 absl::FormatDuration(huge_range +
1656 (absl::Seconds(1) - absl::Nanoseconds(1))));
1657 EXPECT_EQ("876000000000000h0.9999999995s",
1658 absl::FormatDuration(
1659 huge_range + (absl::Seconds(1) - absl::Nanoseconds(1) / 2)));
1660 EXPECT_EQ("876000000000000h0.99999999975s",
1661 absl::FormatDuration(
1662 huge_range + (absl::Seconds(1) - absl::Nanoseconds(1) / 4)));
1663
1664 EXPECT_EQ("-876000000000000h0.999999999s",
1665 absl::FormatDuration(-huge_range -
1666 (absl::Seconds(1) - absl::Nanoseconds(1))));
1667 EXPECT_EQ("-876000000000000h0.9999999995s",
1668 absl::FormatDuration(
1669 -huge_range - (absl::Seconds(1) - absl::Nanoseconds(1) / 2)));
1670 EXPECT_EQ("-876000000000000h0.99999999975s",
1671 absl::FormatDuration(
1672 -huge_range - (absl::Seconds(1) - absl::Nanoseconds(1) / 4)));
1673 }
1674
TEST(Duration,ParseDuration)1675 TEST(Duration, ParseDuration) {
1676 absl::Duration d;
1677
1678 // No specified unit. Should only work for zero and infinity.
1679 EXPECT_TRUE(absl::ParseDuration("0", &d));
1680 EXPECT_EQ(absl::ZeroDuration(), d);
1681 EXPECT_TRUE(absl::ParseDuration("+0", &d));
1682 EXPECT_EQ(absl::ZeroDuration(), d);
1683 EXPECT_TRUE(absl::ParseDuration("-0", &d));
1684 EXPECT_EQ(absl::ZeroDuration(), d);
1685
1686 EXPECT_TRUE(absl::ParseDuration("inf", &d));
1687 EXPECT_EQ(absl::InfiniteDuration(), d);
1688 EXPECT_TRUE(absl::ParseDuration("+inf", &d));
1689 EXPECT_EQ(absl::InfiniteDuration(), d);
1690 EXPECT_TRUE(absl::ParseDuration("-inf", &d));
1691 EXPECT_EQ(-absl::InfiniteDuration(), d);
1692 EXPECT_FALSE(absl::ParseDuration("infBlah", &d));
1693
1694 // Illegal input forms.
1695 EXPECT_FALSE(absl::ParseDuration("", &d));
1696 EXPECT_FALSE(absl::ParseDuration("0.0", &d));
1697 EXPECT_FALSE(absl::ParseDuration(".0", &d));
1698 EXPECT_FALSE(absl::ParseDuration(".", &d));
1699 EXPECT_FALSE(absl::ParseDuration("01", &d));
1700 EXPECT_FALSE(absl::ParseDuration("1", &d));
1701 EXPECT_FALSE(absl::ParseDuration("-1", &d));
1702 EXPECT_FALSE(absl::ParseDuration("2", &d));
1703 EXPECT_FALSE(absl::ParseDuration("2 s", &d));
1704 EXPECT_FALSE(absl::ParseDuration(".s", &d));
1705 EXPECT_FALSE(absl::ParseDuration("-.s", &d));
1706 EXPECT_FALSE(absl::ParseDuration("s", &d));
1707 EXPECT_FALSE(absl::ParseDuration(" 2s", &d));
1708 EXPECT_FALSE(absl::ParseDuration("2s ", &d));
1709 EXPECT_FALSE(absl::ParseDuration(" 2s ", &d));
1710 EXPECT_FALSE(absl::ParseDuration("2mt", &d));
1711 EXPECT_FALSE(absl::ParseDuration("1e3s", &d));
1712
1713 // One unit type.
1714 EXPECT_TRUE(absl::ParseDuration("1ns", &d));
1715 EXPECT_EQ(absl::Nanoseconds(1), d);
1716 EXPECT_TRUE(absl::ParseDuration("1us", &d));
1717 EXPECT_EQ(absl::Microseconds(1), d);
1718 EXPECT_TRUE(absl::ParseDuration("1ms", &d));
1719 EXPECT_EQ(absl::Milliseconds(1), d);
1720 EXPECT_TRUE(absl::ParseDuration("1s", &d));
1721 EXPECT_EQ(absl::Seconds(1), d);
1722 EXPECT_TRUE(absl::ParseDuration("2m", &d));
1723 EXPECT_EQ(absl::Minutes(2), d);
1724 EXPECT_TRUE(absl::ParseDuration("2h", &d));
1725 EXPECT_EQ(absl::Hours(2), d);
1726
1727 // Huge counts of a unit.
1728 EXPECT_TRUE(absl::ParseDuration("9223372036854775807us", &d));
1729 EXPECT_EQ(absl::Microseconds(9223372036854775807), d);
1730 EXPECT_TRUE(absl::ParseDuration("-9223372036854775807us", &d));
1731 EXPECT_EQ(absl::Microseconds(-9223372036854775807), d);
1732
1733 // Multiple units.
1734 EXPECT_TRUE(absl::ParseDuration("2h3m4s", &d));
1735 EXPECT_EQ(absl::Hours(2) + absl::Minutes(3) + absl::Seconds(4), d);
1736 EXPECT_TRUE(absl::ParseDuration("3m4s5us", &d));
1737 EXPECT_EQ(absl::Minutes(3) + absl::Seconds(4) + absl::Microseconds(5), d);
1738 EXPECT_TRUE(absl::ParseDuration("2h3m4s5ms6us7ns", &d));
1739 EXPECT_EQ(absl::Hours(2) + absl::Minutes(3) + absl::Seconds(4) +
1740 absl::Milliseconds(5) + absl::Microseconds(6) +
1741 absl::Nanoseconds(7),
1742 d);
1743
1744 // Multiple units out of order.
1745 EXPECT_TRUE(absl::ParseDuration("2us3m4s5h", &d));
1746 EXPECT_EQ(absl::Hours(5) + absl::Minutes(3) + absl::Seconds(4) +
1747 absl::Microseconds(2),
1748 d);
1749
1750 // Fractional values of units.
1751 EXPECT_TRUE(absl::ParseDuration("1.5ns", &d));
1752 EXPECT_EQ(1.5 * absl::Nanoseconds(1), d);
1753 EXPECT_TRUE(absl::ParseDuration("1.5us", &d));
1754 EXPECT_EQ(1.5 * absl::Microseconds(1), d);
1755 EXPECT_TRUE(absl::ParseDuration("1.5ms", &d));
1756 EXPECT_EQ(1.5 * absl::Milliseconds(1), d);
1757 EXPECT_TRUE(absl::ParseDuration("1.5s", &d));
1758 EXPECT_EQ(1.5 * absl::Seconds(1), d);
1759 EXPECT_TRUE(absl::ParseDuration("1.5m", &d));
1760 EXPECT_EQ(1.5 * absl::Minutes(1), d);
1761 EXPECT_TRUE(absl::ParseDuration("1.5h", &d));
1762 EXPECT_EQ(1.5 * absl::Hours(1), d);
1763
1764 // Huge fractional counts of a unit.
1765 EXPECT_TRUE(absl::ParseDuration("0.4294967295s", &d));
1766 EXPECT_EQ(absl::Nanoseconds(429496729) + absl::Nanoseconds(1) / 2, d);
1767 EXPECT_TRUE(absl::ParseDuration("0.429496729501234567890123456789s", &d));
1768 EXPECT_EQ(absl::Nanoseconds(429496729) + absl::Nanoseconds(1) / 2, d);
1769
1770 // Negative durations.
1771 EXPECT_TRUE(absl::ParseDuration("-1s", &d));
1772 EXPECT_EQ(absl::Seconds(-1), d);
1773 EXPECT_TRUE(absl::ParseDuration("-1m", &d));
1774 EXPECT_EQ(absl::Minutes(-1), d);
1775 EXPECT_TRUE(absl::ParseDuration("-1h", &d));
1776 EXPECT_EQ(absl::Hours(-1), d);
1777
1778 EXPECT_TRUE(absl::ParseDuration("-1h2s", &d));
1779 EXPECT_EQ(-(absl::Hours(1) + absl::Seconds(2)), d);
1780 EXPECT_FALSE(absl::ParseDuration("1h-2s", &d));
1781 EXPECT_FALSE(absl::ParseDuration("-1h-2s", &d));
1782 EXPECT_FALSE(absl::ParseDuration("-1h -2s", &d));
1783 }
1784
TEST(Duration,FormatParseRoundTrip)1785 TEST(Duration, FormatParseRoundTrip) {
1786 #define TEST_PARSE_ROUNDTRIP(d) \
1787 do { \
1788 std::string s = absl::FormatDuration(d); \
1789 absl::Duration dur; \
1790 EXPECT_TRUE(absl::ParseDuration(s, &dur)); \
1791 EXPECT_EQ(d, dur); \
1792 } while (0)
1793
1794 TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(1));
1795 TEST_PARSE_ROUNDTRIP(absl::Microseconds(1));
1796 TEST_PARSE_ROUNDTRIP(absl::Milliseconds(1));
1797 TEST_PARSE_ROUNDTRIP(absl::Seconds(1));
1798 TEST_PARSE_ROUNDTRIP(absl::Minutes(1));
1799 TEST_PARSE_ROUNDTRIP(absl::Hours(1));
1800 TEST_PARSE_ROUNDTRIP(absl::Hours(1) + absl::Nanoseconds(2));
1801
1802 TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(-1));
1803 TEST_PARSE_ROUNDTRIP(absl::Microseconds(-1));
1804 TEST_PARSE_ROUNDTRIP(absl::Milliseconds(-1));
1805 TEST_PARSE_ROUNDTRIP(absl::Seconds(-1));
1806 TEST_PARSE_ROUNDTRIP(absl::Minutes(-1));
1807 TEST_PARSE_ROUNDTRIP(absl::Hours(-1));
1808
1809 TEST_PARSE_ROUNDTRIP(absl::Hours(-1) + absl::Nanoseconds(2));
1810 TEST_PARSE_ROUNDTRIP(absl::Hours(1) + absl::Nanoseconds(-2));
1811 TEST_PARSE_ROUNDTRIP(absl::Hours(-1) + absl::Nanoseconds(-2));
1812
1813 TEST_PARSE_ROUNDTRIP(absl::Nanoseconds(1) +
1814 absl::Nanoseconds(1) / 4); // 1.25ns
1815
1816 const absl::Duration huge_range = ApproxYears(100000000000);
1817 TEST_PARSE_ROUNDTRIP(huge_range);
1818 TEST_PARSE_ROUNDTRIP(huge_range + (absl::Seconds(1) - absl::Nanoseconds(1)));
1819
1820 #undef TEST_PARSE_ROUNDTRIP
1821 }
1822
TEST(Duration,AbslStringify)1823 TEST(Duration, AbslStringify) {
1824 // FormatDuration is already well tested, so just use one test case here to
1825 // verify that StrFormat("%v", d) works as expected.
1826 absl::Duration d = absl::Seconds(1);
1827 EXPECT_EQ(absl::StrFormat("%v", d), absl::FormatDuration(d));
1828 }
1829
TEST(Duration,NoPadding)1830 TEST(Duration, NoPadding) {
1831 // Should match the size of a struct with uint32_t alignment and no padding.
1832 using NoPadding = std::array<uint32_t, 3>;
1833 EXPECT_EQ(sizeof(NoPadding), sizeof(absl::Duration));
1834 EXPECT_EQ(alignof(NoPadding), alignof(absl::Duration));
1835 }
1836
1837 } // namespace
1838