Reland: Simplify PRTimeToBaseTime implementation, add BaseTimeToPRTime.

crypto/nss_util_unittest.cc

+// Copyright (c) 2011 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 "crypto/nss_util.h"
+
+#include <prtime.h>
+
+#include "base/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace crypto {
+
+TEST(NSSUtilTest, PRTimeConversion) {
+  EXPECT_EQ(base::Time::UnixEpoch(), PRTimeToBaseTime(0));
+  EXPECT_EQ(0, BaseTimeToPRTime(base::Time::UnixEpoch()));
+
+  PRExplodedTime prxtime;
+  prxtime.tm_params.tp_gmt_offset = 0;
+  prxtime.tm_params.tp_dst_offset = 0;
+  base::Time::Exploded exploded;
+  prxtime.tm_year = exploded.year = 2011;
+  exploded.month = 12;
+  prxtime.tm_month = 11;
+  prxtime.tm_wday = exploded.day_of_week = 0;  // Should be unusued.
+  prxtime.tm_mday = exploded.day_of_month = 10;
+  prxtime.tm_hour = exploded.hour = 2;
+  prxtime.tm_min = exploded.minute = 52;
+  prxtime.tm_sec = exploded.second = 19;
+  exploded.millisecond = 342;
+  prxtime.tm_usec = 342000;
+
+  PRTime pr_time = PR_ImplodeTime(&prxtime);
+  base::Time base_time = base::Time::FromUTCExploded(exploded);
+
+  EXPECT_EQ(base_time, PRTimeToBaseTime(pr_time));
+  EXPECT_EQ(pr_time, BaseTimeToPRTime(base_time));
+}
+
+}  // namespace crypto