/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/include/module_common_types.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace webrtc {
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TEST(IsNewerSequenceNumber, Equal) {
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EXPECT_FALSE(IsNewerSequenceNumber(0x0001, 0x0001));
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}
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TEST(IsNewerSequenceNumber, NoWrap) {
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EXPECT_TRUE(IsNewerSequenceNumber(0xFFFF, 0xFFFE));
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EXPECT_TRUE(IsNewerSequenceNumber(0x0001, 0x0000));
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EXPECT_TRUE(IsNewerSequenceNumber(0x0100, 0x00FF));
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}
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TEST(IsNewerSequenceNumber, ForwardWrap) {
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EXPECT_TRUE(IsNewerSequenceNumber(0x0000, 0xFFFF));
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EXPECT_TRUE(IsNewerSequenceNumber(0x0000, 0xFF00));
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EXPECT_TRUE(IsNewerSequenceNumber(0x00FF, 0xFFFF));
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EXPECT_TRUE(IsNewerSequenceNumber(0x00FF, 0xFF00));
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}
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TEST(IsNewerSequenceNumber, BackwardWrap) {
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EXPECT_FALSE(IsNewerSequenceNumber(0xFFFF, 0x0000));
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EXPECT_FALSE(IsNewerSequenceNumber(0xFF00, 0x0000));
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EXPECT_FALSE(IsNewerSequenceNumber(0xFFFF, 0x00FF));
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EXPECT_FALSE(IsNewerSequenceNumber(0xFF00, 0x00FF));
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}
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TEST(IsNewerSequenceNumber, HalfWayApart) {
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EXPECT_TRUE(IsNewerSequenceNumber(0x8000, 0x0000));
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EXPECT_FALSE(IsNewerSequenceNumber(0x0000, 0x8000));
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}
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TEST(IsNewerTimestamp, Equal) {
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EXPECT_FALSE(IsNewerTimestamp(0x00000001, 0x000000001));
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}
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TEST(IsNewerTimestamp, NoWrap) {
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EXPECT_TRUE(IsNewerTimestamp(0xFFFFFFFF, 0xFFFFFFFE));
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EXPECT_TRUE(IsNewerTimestamp(0x00000001, 0x00000000));
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EXPECT_TRUE(IsNewerTimestamp(0x00010000, 0x0000FFFF));
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}
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TEST(IsNewerTimestamp, ForwardWrap) {
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EXPECT_TRUE(IsNewerTimestamp(0x00000000, 0xFFFFFFFF));
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EXPECT_TRUE(IsNewerTimestamp(0x00000000, 0xFFFF0000));
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EXPECT_TRUE(IsNewerTimestamp(0x0000FFFF, 0xFFFFFFFF));
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EXPECT_TRUE(IsNewerTimestamp(0x0000FFFF, 0xFFFF0000));
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}
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TEST(IsNewerTimestamp, BackwardWrap) {
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EXPECT_FALSE(IsNewerTimestamp(0xFFFFFFFF, 0x00000000));
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EXPECT_FALSE(IsNewerTimestamp(0xFFFF0000, 0x00000000));
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EXPECT_FALSE(IsNewerTimestamp(0xFFFFFFFF, 0x0000FFFF));
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EXPECT_FALSE(IsNewerTimestamp(0xFFFF0000, 0x0000FFFF));
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}
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TEST(IsNewerTimestamp, HalfWayApart) {
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EXPECT_TRUE(IsNewerTimestamp(0x80000000, 0x00000000));
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EXPECT_FALSE(IsNewerTimestamp(0x00000000, 0x80000000));
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}
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TEST(LatestSequenceNumber, NoWrap) {
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EXPECT_EQ(0xFFFFu, LatestSequenceNumber(0xFFFF, 0xFFFE));
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EXPECT_EQ(0x0001u, LatestSequenceNumber(0x0001, 0x0000));
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EXPECT_EQ(0x0100u, LatestSequenceNumber(0x0100, 0x00FF));
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EXPECT_EQ(0xFFFFu, LatestSequenceNumber(0xFFFE, 0xFFFF));
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EXPECT_EQ(0x0001u, LatestSequenceNumber(0x0000, 0x0001));
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EXPECT_EQ(0x0100u, LatestSequenceNumber(0x00FF, 0x0100));
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}
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TEST(LatestSequenceNumber, Wrap) {
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EXPECT_EQ(0x0000u, LatestSequenceNumber(0x0000, 0xFFFF));
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EXPECT_EQ(0x0000u, LatestSequenceNumber(0x0000, 0xFF00));
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EXPECT_EQ(0x00FFu, LatestSequenceNumber(0x00FF, 0xFFFF));
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EXPECT_EQ(0x00FFu, LatestSequenceNumber(0x00FF, 0xFF00));
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EXPECT_EQ(0x0000u, LatestSequenceNumber(0xFFFF, 0x0000));
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EXPECT_EQ(0x0000u, LatestSequenceNumber(0xFF00, 0x0000));
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EXPECT_EQ(0x00FFu, LatestSequenceNumber(0xFFFF, 0x00FF));
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EXPECT_EQ(0x00FFu, LatestSequenceNumber(0xFF00, 0x00FF));
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}
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TEST(LatestTimestamp, NoWrap) {
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EXPECT_EQ(0xFFFFFFFFu, LatestTimestamp(0xFFFFFFFF, 0xFFFFFFFE));
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EXPECT_EQ(0x00000001u, LatestTimestamp(0x00000001, 0x00000000));
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EXPECT_EQ(0x00010000u, LatestTimestamp(0x00010000, 0x0000FFFF));
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}
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TEST(LatestTimestamp, Wrap) {
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EXPECT_EQ(0x00000000u, LatestTimestamp(0x00000000, 0xFFFFFFFF));
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EXPECT_EQ(0x00000000u, LatestTimestamp(0x00000000, 0xFFFF0000));
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EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0x0000FFFF, 0xFFFFFFFF));
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EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0x0000FFFF, 0xFFFF0000));
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EXPECT_EQ(0x00000000u, LatestTimestamp(0xFFFFFFFF, 0x00000000));
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EXPECT_EQ(0x00000000u, LatestTimestamp(0xFFFF0000, 0x00000000));
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EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0xFFFFFFFF, 0x0000FFFF));
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EXPECT_EQ(0x0000FFFFu, LatestTimestamp(0xFFFF0000, 0x0000FFFF));
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}
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TEST(ClampToInt16, TestCases) {
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EXPECT_EQ(0x0000, ClampToInt16(0x00000000));
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EXPECT_EQ(0x0001, ClampToInt16(0x00000001));
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EXPECT_EQ(0x7FFF, ClampToInt16(0x00007FFF));
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EXPECT_EQ(0x7FFF, ClampToInt16(0x7FFFFFFF));
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EXPECT_EQ(-0x0001, ClampToInt16(-0x00000001));
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EXPECT_EQ(-0x8000, ClampToInt16(-0x8000));
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EXPECT_EQ(-0x8000, ClampToInt16(-0x7FFFFFFF));
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}
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TEST(SequenceNumberUnwrapper, Limits) {
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SequenceNumberUnwrapper unwrapper;
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EXPECT_EQ(0, unwrapper.Unwrap(0));
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EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
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// Delta is exactly 0x8000 but current is lower than input, wrap backwards.
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EXPECT_EQ(0x0, unwrapper.Unwrap(0x0000));
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EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
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EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
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EXPECT_EQ(0x10000, unwrapper.Unwrap(0x0000));
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EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
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EXPECT_EQ(0x8000, unwrapper.Unwrap(0x8000));
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EXPECT_EQ(0, unwrapper.Unwrap(0));
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// Don't allow negative values.
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EXPECT_EQ(0xFFFF, unwrapper.Unwrap(0xFFFF));
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}
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TEST(SequenceNumberUnwrapper, ForwardWraps) {
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int64_t seq = 0;
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SequenceNumberUnwrapper unwrapper;
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const int kMaxIncrease = 0x8000 - 1;
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const int kNumWraps = 4;
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for (int i = 0; i < kNumWraps * 2; ++i) {
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int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
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EXPECT_EQ(seq, unwrapped);
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seq += kMaxIncrease;
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}
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unwrapper.UpdateLast(0);
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for (int seq = 0; seq < kNumWraps * 0xFFFF; ++seq) {
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int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
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EXPECT_EQ(seq, unwrapped);
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}
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}
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TEST(SequenceNumberUnwrapper, BackwardWraps) {
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SequenceNumberUnwrapper unwrapper;
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const int kMaxDecrease = 0x8000 - 1;
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const int kNumWraps = 4;
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int64_t seq = kNumWraps * 2 * kMaxDecrease;
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unwrapper.UpdateLast(seq);
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for (int i = kNumWraps * 2; i >= 0; --i) {
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int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
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EXPECT_EQ(seq, unwrapped);
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seq -= kMaxDecrease;
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}
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seq = kNumWraps * 0xFFFF;
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unwrapper.UpdateLast(seq);
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for (; seq >= 0; --seq) {
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int64_t unwrapped = unwrapper.Unwrap(static_cast<uint16_t>(seq & 0xFFFF));
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EXPECT_EQ(seq, unwrapped);
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}
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}
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} // namespace webrtc
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