Introduce helper class NtpTime
Seconds and fractions parts of the ntp time presented with two values, but used as one.
This helper structure can make that use more clear.
(initially introduced into rtp_rtcp as https://codereview.webrtc.org/1435833003)
BUG=webrtc:5260
Review URL: https://codereview.webrtc.org/1482593002
Cr-Commit-Position: refs/heads/master@{#10814}
diff --git a/webrtc/system_wrappers/source/ntp_time_unittest.cc b/webrtc/system_wrappers/source/ntp_time_unittest.cc
new file mode 100644
index 0000000..ff11288
--- /dev/null
+++ b/webrtc/system_wrappers/source/ntp_time_unittest.cc
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include "webrtc/system_wrappers/include/ntp_time.h"
+
+namespace webrtc {
+namespace {
+
+const uint32_t kNtpSec = 0x12345678;
+const uint32_t kNtpFrac = 0x23456789;
+
+TEST(NtpTimeTest, NoValueMeansInvalid) {
+ NtpTime ntp;
+ EXPECT_FALSE(ntp.Valid());
+}
+
+TEST(NtpTimeTest, CanResetValue) {
+ NtpTime ntp(kNtpSec, kNtpFrac);
+ EXPECT_TRUE(ntp.Valid());
+ ntp.Reset();
+ EXPECT_FALSE(ntp.Valid());
+}
+
+TEST(NtpTimeTest, CanGetWhatIsSet) {
+ NtpTime ntp;
+ ntp.Set(kNtpSec, kNtpFrac);
+ EXPECT_EQ(kNtpSec, ntp.seconds());
+ EXPECT_EQ(kNtpFrac, ntp.fractions());
+}
+
+TEST(NtpTimeTest, SetIsSameAs2ParameterConstructor) {
+ NtpTime ntp1(kNtpSec, kNtpFrac);
+ NtpTime ntp2;
+ EXPECT_NE(ntp1, ntp2);
+
+ ntp2.Set(kNtpSec, kNtpFrac);
+ EXPECT_EQ(ntp1, ntp2);
+}
+
+TEST(NtpTimeTest, SetCurrentIsSameAs1ParameterConstructor) {
+ SimulatedClock clock(0x0123456789abcdef);
+
+ NtpTime ntp1(clock);
+ NtpTime ntp2;
+ EXPECT_NE(ntp1, ntp2);
+
+ ntp2.SetCurrent(clock);
+ EXPECT_EQ(ntp1, ntp2);
+}
+
+TEST(NtpTimeTest, ToMsMeansToNtpMilliseconds) {
+ SimulatedClock clock(0x123456789abc);
+
+ NtpTime ntp(clock);
+ EXPECT_EQ(ntp.ToMs(), Clock::NtpToMs(ntp.seconds(), ntp.fractions()));
+ EXPECT_EQ(ntp.ToMs(), clock.CurrentNtpInMilliseconds());
+}
+
+} // namespace
+} // namespace webrtc