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Diffstat (limited to 'third_party/libwebrtc/system_wrappers/source/ntp_time_unittest.cc')
-rw-r--r-- | third_party/libwebrtc/system_wrappers/source/ntp_time_unittest.cc | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/third_party/libwebrtc/system_wrappers/source/ntp_time_unittest.cc b/third_party/libwebrtc/system_wrappers/source/ntp_time_unittest.cc new file mode 100644 index 0000000000..0705531e37 --- /dev/null +++ b/third_party/libwebrtc/system_wrappers/source/ntp_time_unittest.cc @@ -0,0 +1,280 @@ +/* + * 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 "system_wrappers/include/ntp_time.h" + +#include <random> + +#include "system_wrappers/include/clock.h" +#include "test/gtest.h" + +namespace webrtc { +namespace { + +constexpr uint32_t kNtpSec = 0x12345678; +constexpr uint32_t kNtpFrac = 0x23456789; + +constexpr int64_t kOneSecQ32x32 = uint64_t{1} << 32; +constexpr int64_t kOneMsQ32x32 = 4294967; + +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, ToMsMeansToNtpMilliseconds) { + SimulatedClock clock(0x123456789abc); + + NtpTime ntp = clock.CurrentNtpTime(); + EXPECT_EQ(ntp.ToMs(), clock.CurrentNtpInMilliseconds()); +} + +TEST(NtpTimeTest, CanExplicitlyConvertToAndFromUint64) { + uint64_t untyped_time = 0x123456789; + NtpTime time(untyped_time); + EXPECT_EQ(untyped_time, static_cast<uint64_t>(time)); + EXPECT_EQ(NtpTime(0x12345678, 0x90abcdef), NtpTime(0x1234567890abcdef)); +} + +TEST(NtpTimeTest, VerifyInt64MsToQ32x32NearZero) { + // Zero + EXPECT_EQ(Int64MsToQ32x32(0), 0); + + // Zero + 1 millisecond + EXPECT_EQ(Int64MsToQ32x32(1), kOneMsQ32x32); + + // Zero - 1 millisecond + EXPECT_EQ(Int64MsToQ32x32(-1), -kOneMsQ32x32); + + // Zero + 1 second + EXPECT_EQ(Int64MsToQ32x32(1000), kOneSecQ32x32); + + // Zero - 1 second + EXPECT_EQ(Int64MsToQ32x32(-1000), -kOneSecQ32x32); +} + +TEST(NtpTimeTest, VerifyInt64MsToUQ32x32NearZero) { + // Zero + EXPECT_EQ(Int64MsToUQ32x32(0), uint64_t{0}); + + // Zero + 1 millisecond + EXPECT_EQ(Int64MsToUQ32x32(1), uint64_t{kOneMsQ32x32}); + + // Zero - 1 millisecond + EXPECT_EQ(Int64MsToUQ32x32(-1), uint64_t{0}); // Clamped + + // Zero + 1 second + EXPECT_EQ(Int64MsToUQ32x32(1000), uint64_t{kOneSecQ32x32}); + + // Zero - 1 second + EXPECT_EQ(Int64MsToUQ32x32(-1000), uint64_t{0}); // Clamped +} + +TEST(NtpTimeTest, VerifyQ32x32ToInt64MsNearZero) { + // Zero + EXPECT_EQ(Q32x32ToInt64Ms(0), 0); + + // Zero + 1 millisecond + EXPECT_EQ(Q32x32ToInt64Ms(kOneMsQ32x32), 1); + + // Zero - 1 millisecond + EXPECT_EQ(Q32x32ToInt64Ms(-kOneMsQ32x32), -1); + + // Zero + 1 second + EXPECT_EQ(Q32x32ToInt64Ms(kOneSecQ32x32), 1000); + + // Zero - 1 second + EXPECT_EQ(Q32x32ToInt64Ms(-kOneSecQ32x32), -1000); +} + +TEST(NtpTimeTest, VerifyUQ32x32ToInt64MsNearZero) { + // Zero + EXPECT_EQ(UQ32x32ToInt64Ms(0), 0); + + // Zero + 1 millisecond + EXPECT_EQ(UQ32x32ToInt64Ms(kOneMsQ32x32), 1); + + // Zero + 1 second + EXPECT_EQ(UQ32x32ToInt64Ms(kOneSecQ32x32), 1000); +} + +TEST(NtpTimeTest, VerifyInt64MsToQ32x32NearMax) { + constexpr int64_t kMaxQ32x32 = std::numeric_limits<int64_t>::max(); + constexpr int64_t kBoundaryMs = (kMaxQ32x32 >> 32) * 1000 + 999; + + // Max + const int64_t boundary_q32x32 = Int64MsToQ32x32(kBoundaryMs); + EXPECT_LE(boundary_q32x32, kMaxQ32x32); + EXPECT_GT(boundary_q32x32, kMaxQ32x32 - kOneMsQ32x32); + + // Max + 1 millisecond + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs + 1), kMaxQ32x32); // Clamped + + // Max - 1 millisecond + EXPECT_LE(Int64MsToQ32x32(kBoundaryMs - 1), kMaxQ32x32 - kOneMsQ32x32); + + // Max + 1 second + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs + 1000), kMaxQ32x32); // Clamped + + // Max - 1 second + EXPECT_LE(Int64MsToQ32x32(kBoundaryMs - 1000), kMaxQ32x32 - kOneSecQ32x32); +} + +TEST(NtpTimeTest, VerifyInt64MsToUQ32x32NearMax) { + constexpr uint64_t kMaxUQ32x32 = std::numeric_limits<uint64_t>::max(); + constexpr int64_t kBoundaryMs = (kMaxUQ32x32 >> 32) * 1000 + 999; + + // Max + const uint64_t boundary_uq32x32 = Int64MsToUQ32x32(kBoundaryMs); + EXPECT_LE(boundary_uq32x32, kMaxUQ32x32); + EXPECT_GT(boundary_uq32x32, kMaxUQ32x32 - kOneMsQ32x32); + + // Max + 1 millisecond + EXPECT_EQ(Int64MsToUQ32x32(kBoundaryMs + 1), kMaxUQ32x32); // Clamped + + // Max - 1 millisecond + EXPECT_LE(Int64MsToUQ32x32(kBoundaryMs - 1), kMaxUQ32x32 - kOneMsQ32x32); + + // Max + 1 second + EXPECT_EQ(Int64MsToUQ32x32(kBoundaryMs + 1000), kMaxUQ32x32); // Clamped + + // Max - 1 second + EXPECT_LE(Int64MsToUQ32x32(kBoundaryMs - 1000), kMaxUQ32x32 - kOneSecQ32x32); +} + +TEST(NtpTimeTest, VerifyQ32x32ToInt64MsNearMax) { + constexpr int64_t kMaxQ32x32 = std::numeric_limits<int64_t>::max(); + constexpr int64_t kBoundaryMs = (kMaxQ32x32 >> 32) * 1000 + 1000; + + // Max + EXPECT_EQ(Q32x32ToInt64Ms(kMaxQ32x32), kBoundaryMs); + + // Max - 1 millisecond + EXPECT_EQ(Q32x32ToInt64Ms(kMaxQ32x32 - kOneMsQ32x32), kBoundaryMs - 1); + + // Max - 1 second + EXPECT_EQ(Q32x32ToInt64Ms(kMaxQ32x32 - kOneSecQ32x32), kBoundaryMs - 1000); +} + +TEST(NtpTimeTest, VerifyUQ32x32ToInt64MsNearMax) { + constexpr uint64_t kMaxUQ32x32 = std::numeric_limits<uint64_t>::max(); + constexpr int64_t kBoundaryMs = (kMaxUQ32x32 >> 32) * 1000 + 1000; + + // Max + EXPECT_EQ(UQ32x32ToInt64Ms(kMaxUQ32x32), kBoundaryMs); + + // Max - 1 millisecond + EXPECT_EQ(UQ32x32ToInt64Ms(kMaxUQ32x32 - kOneMsQ32x32), kBoundaryMs - 1); + + // Max - 1 second + EXPECT_EQ(UQ32x32ToInt64Ms(kMaxUQ32x32 - kOneSecQ32x32), kBoundaryMs - 1000); +} + +TEST(NtpTimeTest, VerifyInt64MsToQ32x32NearMin) { + constexpr int64_t kBoundaryQ32x32 = 0x8000000000000000; + constexpr int64_t kBoundaryMs = -int64_t{0x80000000} * 1000; + + // Min + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs), kBoundaryQ32x32); + + // Min + 1 millisecond + EXPECT_EQ(Q32x32ToInt64Ms(Int64MsToQ32x32(kBoundaryMs + 1)), kBoundaryMs + 1); + + // Min - 1 millisecond + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs - 1), kBoundaryQ32x32); // Clamped + + // Min + 1 second + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs + 1000), + kBoundaryQ32x32 + kOneSecQ32x32); + + // Min - 1 second + EXPECT_EQ(Int64MsToQ32x32(kBoundaryMs - 1000), kBoundaryQ32x32); // Clamped +} + +TEST(NtpTimeTest, VerifyQ32x32ToInt64MsNearMin) { + constexpr int64_t kBoundaryQ32x32 = 0x8000000000000000; + constexpr int64_t kBoundaryMs = -int64_t{0x80000000} * 1000; + + // Min + EXPECT_EQ(Q32x32ToInt64Ms(kBoundaryQ32x32), kBoundaryMs); + + // Min + 1 millisecond + EXPECT_EQ(Q32x32ToInt64Ms(kBoundaryQ32x32 + kOneMsQ32x32), kBoundaryMs + 1); + + // Min + 1 second + EXPECT_EQ(Q32x32ToInt64Ms(kBoundaryQ32x32 + kOneSecQ32x32), + kBoundaryMs + 1000); +} + +TEST(NtpTimeTest, VerifyInt64MsToQ32x32RoundTrip) { + constexpr int kIterations = 50000; + + std::mt19937 generator(123456789); + std::uniform_int_distribution<int64_t> distribution( + Q32x32ToInt64Ms(std::numeric_limits<int64_t>::min()), + Q32x32ToInt64Ms(std::numeric_limits<int64_t>::max())); + + for (int iteration = 0; iteration < kIterations; ++iteration) { + int64_t input_ms = distribution(generator); + int64_t transit_q32x32 = Int64MsToQ32x32(input_ms); + int64_t output_ms = Q32x32ToInt64Ms(transit_q32x32); + + ASSERT_EQ(input_ms, output_ms) + << "iteration = " << iteration << ", input_ms = " << input_ms + << ", transit_q32x32 = " << transit_q32x32 + << ", output_ms = " << output_ms; + } +} + +TEST(NtpTimeTest, VerifyInt64MsToUQ32x32RoundTrip) { + constexpr int kIterations = 50000; + + std::mt19937 generator(123456789); + std::uniform_int_distribution<uint64_t> distribution( + UQ32x32ToInt64Ms(std::numeric_limits<uint64_t>::min()), + UQ32x32ToInt64Ms(std::numeric_limits<uint64_t>::max())); + + for (int iteration = 0; iteration < kIterations; ++iteration) { + uint64_t input_ms = distribution(generator); + uint64_t transit_uq32x32 = Int64MsToUQ32x32(input_ms); + uint64_t output_ms = UQ32x32ToInt64Ms(transit_uq32x32); + + ASSERT_EQ(input_ms, output_ms) + << "iteration = " << iteration << ", input_ms = " << input_ms + << ", transit_uq32x32 = " << transit_uq32x32 + << ", output_ms = " << output_ms; + } +} + +} // namespace +} // namespace webrtc |