1 files changed, 161 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc
new file mode 100644
index 0000000000..d59fd4ec48
--- /dev/null
+++ b/third_party/libwebrtc/net/dcsctp/packet/chunk_validators_test.cc
@@ -0,0 +1,161 @@
+/*
+ *  Copyright (c) 2021 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 "net/dcsctp/packet/chunk_validators.h"
+
+#include <utility>
+
+#include "rtc_base/gunit.h"
+#include "test/gmock.h"
+
+namespace dcsctp {
+namespace {
+using ::testing::ElementsAre;
+using ::testing::IsEmpty;
+
+TEST(ChunkValidatorsTest, NoGapAckBlocksAreValid) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 /*gap_ack_blocks=*/{}, {});
+
+  EXPECT_TRUE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+  EXPECT_THAT(clean.gap_ack_blocks(), IsEmpty());
+}
+
+TEST(ChunkValidatorsTest, OneValidAckBlock) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(2, 3)}, {});
+
+  EXPECT_TRUE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(2, 3)));
+}
+
+TEST(ChunkValidatorsTest, TwoValidAckBlocks) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(5, 6)},
+                 {});
+
+  EXPECT_TRUE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+  EXPECT_THAT(
+      clean.gap_ack_blocks(),
+      ElementsAre(SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(5, 6)));
+}
+
+TEST(ChunkValidatorsTest, OneInvalidAckBlock) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456, {SackChunk::GapAckBlock(1, 2)}, {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  // It's not strictly valid, but due to the renegable nature of gap ack blocks,
+  // the cum_ack_tsn can't simply be moved.
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(1, 2)));
+}
+
+TEST(ChunkValidatorsTest, RemovesInvalidGapAckBlockFromSack) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(2, 3), SackChunk::GapAckBlock(6, 4)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(2, 3)));
+}
+
+TEST(ChunkValidatorsTest, SortsGapAckBlocksInOrder) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(6, 7), SackChunk::GapAckBlock(3, 4)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(
+      clean.gap_ack_blocks(),
+      ElementsAre(SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(6, 7)));
+}
+
+TEST(ChunkValidatorsTest, MergesAdjacentBlocks) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(5, 6)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(3, 6)));
+}
+
+TEST(ChunkValidatorsTest, MergesOverlappingByOne) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(3, 4), SackChunk::GapAckBlock(4, 5)},
+                 {});
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(3, 5)));
+}
+
+TEST(ChunkValidatorsTest, MergesOverlappingByMore) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(3, 10), SackChunk::GapAckBlock(4, 5)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(3, 10)));
+}
+
+TEST(ChunkValidatorsTest, MergesBlocksStartingWithSameStartOffset) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(3, 7), SackChunk::GapAckBlock(3, 5),
+                  SackChunk::GapAckBlock(3, 9)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(3, 9)));
+}
+
+TEST(ChunkValidatorsTest, MergesBlocksPartiallyOverlapping) {
+  SackChunk sack(TSN(123), /*a_rwnd=*/456,
+                 {SackChunk::GapAckBlock(3, 7), SackChunk::GapAckBlock(5, 9)},
+                 {});
+
+  EXPECT_FALSE(ChunkValidators::Validate(sack));
+
+  SackChunk clean = ChunkValidators::Clean(std::move(sack));
+
+  EXPECT_THAT(clean.gap_ack_blocks(),
+              ElementsAre(SackChunk::GapAckBlock(3, 9)));
+}
+
+}  // namespace
+}  // namespace dcsctp