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