blob: 0979af38e63e556f0c0cb311933e7391e64ee0f2 [file] [log] [blame]
/*
* Copyright (c) 2013 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 "modules/include/module_common_types.h"
#include "modules/include/module_common_types_public.h"
#include "test/gtest.h"
namespace webrtc {
TEST(IsNewerSequenceNumber, Equal) {
EXPECT_FALSE(IsNewerSequenceNumber(0x0001, 0x0001));
}
TEST(IsNewerSequenceNumber, NoWrap) {
EXPECT_TRUE(IsNewerSequenceNumber(0xFFFF, 0xFFFE));
EXPECT_TRUE(IsNewerSequenceNumber(0x0001, 0x0000));
EXPECT_TRUE(IsNewerSequenceNumber(0x0100, 0x00FF));
}
TEST(IsNewerSequenceNumber, ForwardWrap) {
EXPECT_TRUE(IsNewerSequenceNumber(0x0000, 0xFFFF));
EXPECT_TRUE(IsNewerSequenceNumber(0x0000, 0xFF00));
EXPECT_TRUE(IsNewerSequenceNumber(0x00FF, 0xFFFF));
EXPECT_TRUE(IsNewerSequenceNumber(0x00FF, 0xFF00));
}
TEST(IsNewerSequenceNumber, BackwardWrap) {
EXPECT_FALSE(IsNewerSequenceNumber(0xFFFF, 0x0000));
EXPECT_FALSE(IsNewerSequenceNumber(0xFF00, 0x0000));
EXPECT_FALSE(IsNewerSequenceNumber(0xFFFF, 0x00FF));
EXPECT_FALSE(IsNewerSequenceNumber(0xFF00, 0x00FF));
}
TEST(IsNewerSequenceNumber, HalfWayApart) {
EXPECT_TRUE(IsNewerSequenceNumber(0x8000, 0x0000));
EXPECT_FALSE(IsNewerSequenceNumber(0x0000, 0x8000));
}
TEST(IsNewerTimestamp, Equal) {
EXPECT_FALSE(IsNewerTimestamp(0x00000001, 0x000000001));
}
TEST(IsNewerTimestamp, NoWrap) {
EXPECT_TRUE(IsNewerTimestamp(0xFFFFFFFF, 0xFFFFFFFE));
EXPECT_TRUE(IsNewerTimestamp(0x00000001, 0x00000000));
EXPECT_TRUE(IsNewerTimestamp(0x00010000, 0x0000FFFF));
}
TEST(IsNewerTimestamp, ForwardWrap) {
EXPECT_TRUE(IsNewerTimestamp(0x00000000, 0xFFFFFFFF));
EXPECT_TRUE(IsNewerTimestamp(0x00000000, 0xFFFF0000));
EXPECT_TRUE(IsNewerTimestamp(0x0000FFFF, 0xFFFFFFFF));
EXPECT_TRUE(IsNewerTimestamp(0x0000FFFF, 0xFFFF0000));
}
TEST(IsNewerTimestamp, BackwardWrap) {
EXPECT_FALSE(IsNewerTimestamp(0xFFFFFFFF, 0x00000000));
EXPECT_FALSE(IsNewerTimestamp(0xFFFF0000, 0x00000000));
EXPECT_FALSE(IsNewerTimestamp(0xFFFFFFFF, 0x0000FFFF));
EXPECT_FALSE(IsNewerTimestamp(0xFFFF0000, 0x0000FFFF));
}
TEST(IsNewerTimestamp, HalfWayApart) {
EXPECT_TRUE(IsNewerTimestamp(0x80000000, 0x00000000));
EXPECT_FALSE(IsNewerTimestamp(0x00000000, 0x80000000));
}
TEST(LatestSequenceNumber, NoWrap) {
EXPECT_EQ(0xFFFFu, LatestSequenceNumber(0xFFFF, 0xFFFE));
EXPECT_EQ(0x0001u, LatestSequenceNumber(0x0001, 0x0000));
EXPECT_EQ(0x0100u, LatestSequenceNumber(0x0100, 0x00FF));
EXPECT_EQ(0xFFFFu, LatestSequenceNumber(0xFFFE, 0xFFFF));
EXPECT_EQ(0x0001u, LatestSequenceNumber(0x0000, 0x0001));
EXPECT_EQ(0x0100u, LatestSequenceNumber(0x00FF, 0x0100));
}
TEST(LatestSequenceNumber, Wrap) {
EXPECT_EQ(0x0000u, LatestSequenceNumber(0x0000, 0xFFFF));
EXPECT_EQ(0x0000u, LatestSequenceNumber(0x0000, 0xFF00));
EXPECT_EQ(0x00FFu, LatestSequenceNumber(0x00FF, 0xFFFF));
EXPECT_EQ(0x00FFu, LatestSequenceNumber(0x00FF, 0xFF00));
EXPECT_EQ(0x0000u, LatestSequenceNumber(0xFFFF, 0x0000));
EXPECT_EQ(0x0000u, LatestSequenceNumber(0xFF00, 0x0000));
EXPECT_EQ(0x00FFu, LatestSequenceNumber(0xFFFF, 0x00FF));
EXPECT_EQ(0x00FFu, LatestSequenceNumber(0xFF00, 0x00FF));
}
TEST(LatestTimestamp, NoWrap) {
EXPECT_EQ(0xFFFFFFFFu, LatestTimestamp(0xFFFFFFFF, 0xFFFFFFFE));
EXPECT_EQ(0x00000001u, LatestTimestamp(0x00000001, 0x00000000));
EXPECT_EQ(0x00010000u, LatestTimestamp(0x00010000, 0x0000FFFF));
}
TEST(LatestTimestamp, Wrap) {
EXPECT_EQ(0x00000000u, LatestTimestamp(0x00000000, 0xFFFFFFFF));
EXPECT_EQ(0x00000000u, LatestTimestamp(0x00000000, 0xFFFF0000));
EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0x0000FFFF, 0xFFFFFFFF));
EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0x0000FFFF, 0xFFFF0000));
EXPECT_EQ(0x00000000u, LatestTimestamp(0xFFFFFFFF, 0x00000000));
EXPECT_EQ(0x00000000u, LatestTimestamp(0xFFFF0000, 0x00000000));
EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0xFFFFFFFF, 0x0000FFFF));
EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0xFFFF0000, 0x0000FFFF));
}
TEST(SequenceNumberUnwrapper, Limits) {
SequenceNumberUnwrapper unwrapper;
EXPECT_EQ(0, unwrapper.Unwrap(0));
EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
// Delta is exactly 0x8000 but current is lower than input, wrap backwards.
EXPECT_EQ(0, unwrapper.Unwrap(0));
EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
EXPECT_EQ(0x10000, unwrapper.Unwrap(0));
EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
EXPECT_EQ(0, unwrapper.Unwrap(0));
// Don't allow negative values.
EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
}
TEST(SequenceNumberUnwrapper, ForwardWraps) {
int64_t seq = 0;
SequenceNumberUnwrapper unwrapper;
const int kMaxIncrease = 0x8000 - 1;
const int kNumWraps = 4;
for (int i = 0; i < kNumWraps * 2; ++i) {
int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
EXPECT_EQ(seq, unwrapped);
seq += kMaxIncrease;
}
unwrapper.UpdateLast(0);
for (int seq = 0; seq < kNumWraps * 0xFFFF; ++seq) {
int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
EXPECT_EQ(seq, unwrapped);
}
}
TEST(SequenceNumberUnwrapper, BackwardWraps) {
SequenceNumberUnwrapper unwrapper;
const int kMaxDecrease = 0x8000 - 1;
const int kNumWraps = 4;
int64_t seq = kNumWraps * 2 * kMaxDecrease;
unwrapper.UpdateLast(seq);
for (int i = kNumWraps * 2; i >= 0; --i) {
int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
EXPECT_EQ(seq, unwrapped);
seq -= kMaxDecrease;
}
seq = kNumWraps * 0xFFFF;
unwrapper.UpdateLast(seq);
for (; seq >= 0; --seq) {
int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
EXPECT_EQ(seq, unwrapped);
}
}
TEST(TimestampUnwrapper, Limits) {
TimestampUnwrapper unwrapper;
EXPECT_EQ(0, unwrapper.Unwrap(0));
EXPECT_EQ(0x80000000, unwrapper.Unwrap(0x80000000));
// Delta is exactly 0x80000000 but current is lower than input, wrap
// backwards.
EXPECT_EQ(0, unwrapper.Unwrap(0));
EXPECT_EQ(0x80000000, unwrapper.Unwrap(0x80000000));
EXPECT_EQ(0xFFFFFFFF, unwrapper.Unwrap(0xFFFFFFFF));
EXPECT_EQ(0x100000000, unwrapper.Unwrap(0x00000000));
EXPECT_EQ(0xFFFFFFFF, unwrapper.Unwrap(0xFFFFFFFF));
EXPECT_EQ(0x80000000, unwrapper.Unwrap(0x80000000));
EXPECT_EQ(0, unwrapper.Unwrap(0));
// Don't allow negative values.
EXPECT_EQ(0xFFFFFFFF, unwrapper.Unwrap(0xFFFFFFFF));
}
TEST(TimestampUnwrapper, ForwardWraps) {
int64_t ts = 0;
TimestampUnwrapper unwrapper;
const int64_t kMaxIncrease = 0x80000000 - 1;
const int kNumWraps = 4;
for (int i = 0; i < kNumWraps * 2; ++i) {
int64_t unwrapped =
unwrapper.Unwrap(static_cast<uint32_t>(ts & 0xFFFFFFFF));
EXPECT_EQ(ts, unwrapped);
ts += kMaxIncrease;
}
}
TEST(TimestampUnwrapper, BackwardWraps) {
TimestampUnwrapper unwrapper;
const int64_t kMaxDecrease = 0x80000000 - 1;
const int kNumWraps = 4;
int64_t ts = kNumWraps * 2 * kMaxDecrease;
unwrapper.UpdateLast(ts);
for (int i = 0; i <= kNumWraps * 2; ++i) {
int64_t unwrapped =
unwrapper.Unwrap(static_cast<uint32_t>(ts & 0xFFFFFFFF));
EXPECT_EQ(ts, unwrapped);
ts -= kMaxDecrease;
}
}
} // namespace webrtc