Reland "Add base::TimeDelta::Max()"

base/time/time_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/time/time.h"
 
 #include <time.h>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 463 matching lines @@
   // Should be 1970-01-01 00:00:01 1 millisecond.
   EXPECT_EQ(kUnixEpochYear, exploded.year);
   EXPECT_EQ(1, exploded.month);
   EXPECT_EQ(1, exploded.day_of_month);
   EXPECT_EQ(0, exploded.hour);
   EXPECT_EQ(0, exploded.minute);
   EXPECT_EQ(1, exploded.second);
   EXPECT_EQ(1, exploded.millisecond);
 }
 
+TEST_F(TimeTest, TimeDeltaMax) {
+  TimeDelta max = TimeDelta::Max();
+  EXPECT_TRUE(max.is_max());
+  EXPECT_EQ(max, TimeDelta::Max());
+  EXPECT_GT(max, TimeDelta::FromDays(100 * 365));
+  EXPECT_GT(max, TimeDelta());
+}
+
+TEST_F(TimeTest, TimeDeltaMaxConversions) {
+  TimeDelta t = TimeDelta::Max();
+  EXPECT_EQ(std::numeric_limits<int64>::max(), t.ToInternalValue());
+
+  EXPECT_EQ(std::numeric_limits<int>::max(), t.InDays());
+  EXPECT_EQ(std::numeric_limits<int>::max(), t.InHours());
+  EXPECT_EQ(std::numeric_limits<int>::max(), t.InMinutes());
+  EXPECT_EQ(std::numeric_limits<double>::infinity(), t.InSecondsF());
+  EXPECT_EQ(std::numeric_limits<int64>::max(), t.InSeconds());
+  EXPECT_EQ(std::numeric_limits<double>::infinity(), t.InMillisecondsF());
+  EXPECT_EQ(std::numeric_limits<int64>::max(), t.InMilliseconds());
+  EXPECT_EQ(std::numeric_limits<int64>::max(), t.InMillisecondsRoundedUp());
+
+  t = TimeDelta::FromDays(std::numeric_limits<int>::max());
+  EXPECT_TRUE(t.is_max());
+
+  t = TimeDelta::FromHours(std::numeric_limits<int>::max());
+  EXPECT_TRUE(t.is_max());
+
+  t = TimeDelta::FromMinutes(std::numeric_limits<int>::max());
+  EXPECT_TRUE(t.is_max());
+
+  t = TimeDelta::FromSeconds(std::numeric_limits<int64>::max());
+  EXPECT_TRUE(t.is_max());
+
+  t = TimeDelta::FromMilliseconds(std::numeric_limits<int64>::max());
+  EXPECT_TRUE(t.is_max());
+
+  t = TimeDelta::FromMicroseconds(std::numeric_limits<int64>::max());
+  EXPECT_TRUE(t.is_max());
+}
+
 TEST_F(TimeTest, Max) {
   Time max = Time::Max();
   EXPECT_TRUE(max.is_max());
   EXPECT_EQ(max, Time::Max());
   EXPECT_GT(max, Time::Now());
   EXPECT_GT(max, Time());
 }
 
 TEST_F(TimeTest, MaxConversions) {
   Time t = Time::Max();
@@ skipping 218 matching lines @@
   exploded.minute = 0;
   exploded.second = 0;
   exploded.millisecond = 0;
   Time t = Time::FromUTCExploded(exploded);
   // Unix 1970 epoch.
   EXPECT_EQ(GG_INT64_C(11644473600000000), t.ToInternalValue());
 
   // We can't test 1601 epoch, since the system time functions on Linux
   // only compute years starting from 1900.
 }