Squashed 'third_party/protobuf/' content from commit e35e248
Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/csharp/src/Google.Protobuf.Test/CodedInputStreamTest.cs b/csharp/src/Google.Protobuf.Test/CodedInputStreamTest.cs
new file mode 100644
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+++ b/csharp/src/Google.Protobuf.Test/CodedInputStreamTest.cs
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+#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
+using System;
+using System.IO;
+using Google.Protobuf.TestProtos;
+using NUnit.Framework;
+
+namespace Google.Protobuf
+{
+ public class CodedInputStreamTest
+ {
+ /// <summary>
+ /// Helper to construct a byte array from a bunch of bytes. The inputs are
+ /// actually ints so that I can use hex notation and not get stupid errors
+ /// about precision.
+ /// </summary>
+ private static byte[] Bytes(params int[] bytesAsInts)
+ {
+ byte[] bytes = new byte[bytesAsInts.Length];
+ for (int i = 0; i < bytesAsInts.Length; i++)
+ {
+ bytes[i] = (byte) bytesAsInts[i];
+ }
+ return bytes;
+ }
+
+ /// <summary>
+ /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64()
+ /// </summary>
+ private static void AssertReadVarint(byte[] data, ulong value)
+ {
+ CodedInputStream input = new CodedInputStream(data);
+ Assert.AreEqual((uint) value, input.ReadRawVarint32());
+
+ input = new CodedInputStream(data);
+ Assert.AreEqual(value, input.ReadRawVarint64());
+ Assert.IsTrue(input.IsAtEnd);
+
+ // Try different block sizes.
+ for (int bufferSize = 1; bufferSize <= 16; bufferSize *= 2)
+ {
+ input = new CodedInputStream(new SmallBlockInputStream(data, bufferSize));
+ Assert.AreEqual((uint) value, input.ReadRawVarint32());
+
+ input = new CodedInputStream(new SmallBlockInputStream(data, bufferSize));
+ Assert.AreEqual(value, input.ReadRawVarint64());
+ Assert.IsTrue(input.IsAtEnd);
+ }
+
+ // Try reading directly from a MemoryStream. We want to verify that it
+ // doesn't read past the end of the input, so write an extra byte - this
+ // lets us test the position at the end.
+ MemoryStream memoryStream = new MemoryStream();
+ memoryStream.Write(data, 0, data.Length);
+ memoryStream.WriteByte(0);
+ memoryStream.Position = 0;
+ Assert.AreEqual((uint) value, CodedInputStream.ReadRawVarint32(memoryStream));
+ Assert.AreEqual(data.Length, memoryStream.Position);
+ }
+
+ /// <summary>
+ /// Parses the given bytes using ReadRawVarint32() and ReadRawVarint64() and
+ /// expects them to fail with an InvalidProtocolBufferException whose
+ /// description matches the given one.
+ /// </summary>
+ private static void AssertReadVarintFailure(InvalidProtocolBufferException expected, byte[] data)
+ {
+ CodedInputStream input = new CodedInputStream(data);
+ var exception = Assert.Throws<InvalidProtocolBufferException>(() => input.ReadRawVarint32());
+ Assert.AreEqual(expected.Message, exception.Message);
+
+ input = new CodedInputStream(data);
+ exception = Assert.Throws<InvalidProtocolBufferException>(() => input.ReadRawVarint64());
+ Assert.AreEqual(expected.Message, exception.Message);
+
+ // Make sure we get the same error when reading directly from a Stream.
+ exception = Assert.Throws<InvalidProtocolBufferException>(() => CodedInputStream.ReadRawVarint32(new MemoryStream(data)));
+ Assert.AreEqual(expected.Message, exception.Message);
+ }
+
+ [Test]
+ public void ReadVarint()
+ {
+ AssertReadVarint(Bytes(0x00), 0);
+ AssertReadVarint(Bytes(0x01), 1);
+ AssertReadVarint(Bytes(0x7f), 127);
+ // 14882
+ AssertReadVarint(Bytes(0xa2, 0x74), (0x22 << 0) | (0x74 << 7));
+ // 2961488830
+ AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x0b),
+ (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
+ (0x0bL << 28));
+
+ // 64-bit
+ // 7256456126
+ AssertReadVarint(Bytes(0xbe, 0xf7, 0x92, 0x84, 0x1b),
+ (0x3e << 0) | (0x77 << 7) | (0x12 << 14) | (0x04 << 21) |
+ (0x1bL << 28));
+ // 41256202580718336
+ AssertReadVarint(Bytes(0x80, 0xe6, 0xeb, 0x9c, 0xc3, 0xc9, 0xa4, 0x49),
+ (0x00 << 0) | (0x66 << 7) | (0x6b << 14) | (0x1c << 21) |
+ (0x43L << 28) | (0x49L << 35) | (0x24L << 42) | (0x49L << 49));
+ // 11964378330978735131
+ AssertReadVarint(Bytes(0x9b, 0xa8, 0xf9, 0xc2, 0xbb, 0xd6, 0x80, 0x85, 0xa6, 0x01),
+ (0x1b << 0) | (0x28 << 7) | (0x79 << 14) | (0x42 << 21) |
+ (0x3bUL << 28) | (0x56UL << 35) | (0x00UL << 42) |
+ (0x05UL << 49) | (0x26UL << 56) | (0x01UL << 63));
+
+ // Failures
+ AssertReadVarintFailure(
+ InvalidProtocolBufferException.MalformedVarint(),
+ Bytes(0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x00));
+ AssertReadVarintFailure(
+ InvalidProtocolBufferException.TruncatedMessage(),
+ Bytes(0x80));
+ }
+
+ /// <summary>
+ /// Parses the given bytes using ReadRawLittleEndian32() and checks
+ /// that the result matches the given value.
+ /// </summary>
+ private static void AssertReadLittleEndian32(byte[] data, uint value)
+ {
+ CodedInputStream input = new CodedInputStream(data);
+ Assert.AreEqual(value, input.ReadRawLittleEndian32());
+ Assert.IsTrue(input.IsAtEnd);
+
+ // Try different block sizes.
+ for (int blockSize = 1; blockSize <= 16; blockSize *= 2)
+ {
+ input = new CodedInputStream(
+ new SmallBlockInputStream(data, blockSize));
+ Assert.AreEqual(value, input.ReadRawLittleEndian32());
+ Assert.IsTrue(input.IsAtEnd);
+ }
+ }
+
+ /// <summary>
+ /// Parses the given bytes using ReadRawLittleEndian64() and checks
+ /// that the result matches the given value.
+ /// </summary>
+ private static void AssertReadLittleEndian64(byte[] data, ulong value)
+ {
+ CodedInputStream input = new CodedInputStream(data);
+ Assert.AreEqual(value, input.ReadRawLittleEndian64());
+ Assert.IsTrue(input.IsAtEnd);
+
+ // Try different block sizes.
+ for (int blockSize = 1; blockSize <= 16; blockSize *= 2)
+ {
+ input = new CodedInputStream(
+ new SmallBlockInputStream(data, blockSize));
+ Assert.AreEqual(value, input.ReadRawLittleEndian64());
+ Assert.IsTrue(input.IsAtEnd);
+ }
+ }
+
+ [Test]
+ public void ReadLittleEndian()
+ {
+ AssertReadLittleEndian32(Bytes(0x78, 0x56, 0x34, 0x12), 0x12345678);
+ AssertReadLittleEndian32(Bytes(0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef0);
+
+ AssertReadLittleEndian64(Bytes(0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12),
+ 0x123456789abcdef0L);
+ AssertReadLittleEndian64(
+ Bytes(0x78, 0x56, 0x34, 0x12, 0xf0, 0xde, 0xbc, 0x9a), 0x9abcdef012345678UL);
+ }
+
+ [Test]
+ public void DecodeZigZag32()
+ {
+ Assert.AreEqual(0, CodedInputStream.DecodeZigZag32(0));
+ Assert.AreEqual(-1, CodedInputStream.DecodeZigZag32(1));
+ Assert.AreEqual(1, CodedInputStream.DecodeZigZag32(2));
+ Assert.AreEqual(-2, CodedInputStream.DecodeZigZag32(3));
+ Assert.AreEqual(0x3FFFFFFF, CodedInputStream.DecodeZigZag32(0x7FFFFFFE));
+ Assert.AreEqual(unchecked((int) 0xC0000000), CodedInputStream.DecodeZigZag32(0x7FFFFFFF));
+ Assert.AreEqual(0x7FFFFFFF, CodedInputStream.DecodeZigZag32(0xFFFFFFFE));
+ Assert.AreEqual(unchecked((int) 0x80000000), CodedInputStream.DecodeZigZag32(0xFFFFFFFF));
+ }
+
+ [Test]
+ public void DecodeZigZag64()
+ {
+ Assert.AreEqual(0, CodedInputStream.DecodeZigZag64(0));
+ Assert.AreEqual(-1, CodedInputStream.DecodeZigZag64(1));
+ Assert.AreEqual(1, CodedInputStream.DecodeZigZag64(2));
+ Assert.AreEqual(-2, CodedInputStream.DecodeZigZag64(3));
+ Assert.AreEqual(0x000000003FFFFFFFL, CodedInputStream.DecodeZigZag64(0x000000007FFFFFFEL));
+ Assert.AreEqual(unchecked((long) 0xFFFFFFFFC0000000L), CodedInputStream.DecodeZigZag64(0x000000007FFFFFFFL));
+ Assert.AreEqual(0x000000007FFFFFFFL, CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFEL));
+ Assert.AreEqual(unchecked((long) 0xFFFFFFFF80000000L), CodedInputStream.DecodeZigZag64(0x00000000FFFFFFFFL));
+ Assert.AreEqual(0x7FFFFFFFFFFFFFFFL, CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFEL));
+ Assert.AreEqual(unchecked((long) 0x8000000000000000L), CodedInputStream.DecodeZigZag64(0xFFFFFFFFFFFFFFFFL));
+ }
+
+ [Test]
+ public void ReadWholeMessage_VaryingBlockSizes()
+ {
+ TestAllTypes message = SampleMessages.CreateFullTestAllTypes();
+
+ byte[] rawBytes = message.ToByteArray();
+ Assert.AreEqual(rawBytes.Length, message.CalculateSize());
+ TestAllTypes message2 = TestAllTypes.Parser.ParseFrom(rawBytes);
+ Assert.AreEqual(message, message2);
+
+ // Try different block sizes.
+ for (int blockSize = 1; blockSize < 256; blockSize *= 2)
+ {
+ message2 = TestAllTypes.Parser.ParseFrom(new SmallBlockInputStream(rawBytes, blockSize));
+ Assert.AreEqual(message, message2);
+ }
+ }
+
+ [Test]
+ public void ReadHugeBlob()
+ {
+ // Allocate and initialize a 1MB blob.
+ byte[] blob = new byte[1 << 20];
+ for (int i = 0; i < blob.Length; i++)
+ {
+ blob[i] = (byte) i;
+ }
+
+ // Make a message containing it.
+ var message = new TestAllTypes { SingleBytes = ByteString.CopyFrom(blob) };
+
+ // Serialize and parse it. Make sure to parse from an InputStream, not
+ // directly from a ByteString, so that CodedInputStream uses buffered
+ // reading.
+ TestAllTypes message2 = TestAllTypes.Parser.ParseFrom(message.ToByteString());
+
+ Assert.AreEqual(message, message2);
+ }
+
+ [Test]
+ public void ReadMaliciouslyLargeBlob()
+ {
+ MemoryStream ms = new MemoryStream();
+ CodedOutputStream output = new CodedOutputStream(ms);
+
+ uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
+ output.WriteRawVarint32(tag);
+ output.WriteRawVarint32(0x7FFFFFFF);
+ output.WriteRawBytes(new byte[32]); // Pad with a few random bytes.
+ output.Flush();
+ ms.Position = 0;
+
+ CodedInputStream input = new CodedInputStream(ms);
+ Assert.AreEqual(tag, input.ReadTag());
+
+ Assert.Throws<InvalidProtocolBufferException>(() => input.ReadBytes());
+ }
+
+ internal static TestRecursiveMessage MakeRecursiveMessage(int depth)
+ {
+ if (depth == 0)
+ {
+ return new TestRecursiveMessage { I = 5 };
+ }
+ else
+ {
+ return new TestRecursiveMessage { A = MakeRecursiveMessage(depth - 1) };
+ }
+ }
+
+ internal static void AssertMessageDepth(TestRecursiveMessage message, int depth)
+ {
+ if (depth == 0)
+ {
+ Assert.IsNull(message.A);
+ Assert.AreEqual(5, message.I);
+ }
+ else
+ {
+ Assert.IsNotNull(message.A);
+ AssertMessageDepth(message.A, depth - 1);
+ }
+ }
+
+ [Test]
+ public void MaliciousRecursion()
+ {
+ ByteString data64 = MakeRecursiveMessage(64).ToByteString();
+ ByteString data65 = MakeRecursiveMessage(65).ToByteString();
+
+ AssertMessageDepth(TestRecursiveMessage.Parser.ParseFrom(data64), 64);
+
+ Assert.Throws<InvalidProtocolBufferException>(() => TestRecursiveMessage.Parser.ParseFrom(data65));
+
+ CodedInputStream input = CodedInputStream.CreateWithLimits(new MemoryStream(data64.ToByteArray()), 1000000, 63);
+ Assert.Throws<InvalidProtocolBufferException>(() => TestRecursiveMessage.Parser.ParseFrom(input));
+ }
+
+ [Test]
+ public void SizeLimit()
+ {
+ // Have to use a Stream rather than ByteString.CreateCodedInput as SizeLimit doesn't
+ // apply to the latter case.
+ MemoryStream ms = new MemoryStream(SampleMessages.CreateFullTestAllTypes().ToByteArray());
+ CodedInputStream input = CodedInputStream.CreateWithLimits(ms, 16, 100);
+ Assert.Throws<InvalidProtocolBufferException>(() => TestAllTypes.Parser.ParseFrom(input));
+ }
+
+ /// <summary>
+ /// Tests that if we read an string that contains invalid UTF-8, no exception
+ /// is thrown. Instead, the invalid bytes are replaced with the Unicode
+ /// "replacement character" U+FFFD.
+ /// </summary>
+ [Test]
+ public void ReadInvalidUtf8()
+ {
+ MemoryStream ms = new MemoryStream();
+ CodedOutputStream output = new CodedOutputStream(ms);
+
+ uint tag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
+ output.WriteRawVarint32(tag);
+ output.WriteRawVarint32(1);
+ output.WriteRawBytes(new byte[] {0x80});
+ output.Flush();
+ ms.Position = 0;
+
+ CodedInputStream input = new CodedInputStream(ms);
+
+ Assert.AreEqual(tag, input.ReadTag());
+ string text = input.ReadString();
+ Assert.AreEqual('\ufffd', text[0]);
+ }
+
+ /// <summary>
+ /// A stream which limits the number of bytes it reads at a time.
+ /// We use this to make sure that CodedInputStream doesn't screw up when
+ /// reading in small blocks.
+ /// </summary>
+ private sealed class SmallBlockInputStream : MemoryStream
+ {
+ private readonly int blockSize;
+
+ public SmallBlockInputStream(byte[] data, int blockSize)
+ : base(data)
+ {
+ this.blockSize = blockSize;
+ }
+
+ public override int Read(byte[] buffer, int offset, int count)
+ {
+ return base.Read(buffer, offset, Math.Min(count, blockSize));
+ }
+ }
+
+ [Test]
+ public void TestNegativeEnum()
+ {
+ byte[] bytes = { 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01 };
+ CodedInputStream input = new CodedInputStream(bytes);
+ Assert.AreEqual((int)SampleEnum.NegativeValue, input.ReadEnum());
+ Assert.IsTrue(input.IsAtEnd);
+ }
+
+ //Issue 71: CodedInputStream.ReadBytes go to slow path unnecessarily
+ [Test]
+ public void TestSlowPathAvoidance()
+ {
+ using (var ms = new MemoryStream())
+ {
+ CodedOutputStream output = new CodedOutputStream(ms);
+ output.WriteTag(1, WireFormat.WireType.LengthDelimited);
+ output.WriteBytes(ByteString.CopyFrom(new byte[100]));
+ output.WriteTag(2, WireFormat.WireType.LengthDelimited);
+ output.WriteBytes(ByteString.CopyFrom(new byte[100]));
+ output.Flush();
+
+ ms.Position = 0;
+ CodedInputStream input = new CodedInputStream(ms, new byte[ms.Length / 2], 0, 0);
+
+ uint tag = input.ReadTag();
+ Assert.AreEqual(1, WireFormat.GetTagFieldNumber(tag));
+ Assert.AreEqual(100, input.ReadBytes().Length);
+
+ tag = input.ReadTag();
+ Assert.AreEqual(2, WireFormat.GetTagFieldNumber(tag));
+ Assert.AreEqual(100, input.ReadBytes().Length);
+ }
+ }
+
+ [Test]
+ public void Tag0Throws()
+ {
+ var input = new CodedInputStream(new byte[] { 0 });
+ Assert.Throws<InvalidProtocolBufferException>(() => input.ReadTag());
+ }
+
+ [Test]
+ public void SkipGroup()
+ {
+ // Create an output stream with a group in:
+ // Field 1: string "field 1"
+ // Field 2: group containing:
+ // Field 1: fixed int32 value 100
+ // Field 2: string "ignore me"
+ // Field 3: nested group containing
+ // Field 1: fixed int64 value 1000
+ // Field 3: string "field 3"
+ var stream = new MemoryStream();
+ var output = new CodedOutputStream(stream);
+ output.WriteTag(1, WireFormat.WireType.LengthDelimited);
+ output.WriteString("field 1");
+
+ // The outer group...
+ output.WriteTag(2, WireFormat.WireType.StartGroup);
+ output.WriteTag(1, WireFormat.WireType.Fixed32);
+ output.WriteFixed32(100);
+ output.WriteTag(2, WireFormat.WireType.LengthDelimited);
+ output.WriteString("ignore me");
+ // The nested group...
+ output.WriteTag(3, WireFormat.WireType.StartGroup);
+ output.WriteTag(1, WireFormat.WireType.Fixed64);
+ output.WriteFixed64(1000);
+ // Note: Not sure the field number is relevant for end group...
+ output.WriteTag(3, WireFormat.WireType.EndGroup);
+
+ // End the outer group
+ output.WriteTag(2, WireFormat.WireType.EndGroup);
+
+ output.WriteTag(3, WireFormat.WireType.LengthDelimited);
+ output.WriteString("field 3");
+ output.Flush();
+ stream.Position = 0;
+
+ // Now act like a generated client
+ var input = new CodedInputStream(stream);
+ Assert.AreEqual(WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited), input.ReadTag());
+ Assert.AreEqual("field 1", input.ReadString());
+ Assert.AreEqual(WireFormat.MakeTag(2, WireFormat.WireType.StartGroup), input.ReadTag());
+ input.SkipLastField(); // Should consume the whole group, including the nested one.
+ Assert.AreEqual(WireFormat.MakeTag(3, WireFormat.WireType.LengthDelimited), input.ReadTag());
+ Assert.AreEqual("field 3", input.ReadString());
+ }
+
+ [Test]
+ public void EndOfStreamReachedWhileSkippingGroup()
+ {
+ var stream = new MemoryStream();
+ var output = new CodedOutputStream(stream);
+ output.WriteTag(1, WireFormat.WireType.StartGroup);
+ output.WriteTag(2, WireFormat.WireType.StartGroup);
+ output.WriteTag(2, WireFormat.WireType.EndGroup);
+
+ output.Flush();
+ stream.Position = 0;
+
+ // Now act like a generated client
+ var input = new CodedInputStream(stream);
+ input.ReadTag();
+ Assert.Throws<InvalidProtocolBufferException>(() => input.SkipLastField());
+ }
+
+ [Test]
+ public void RecursionLimitAppliedWhileSkippingGroup()
+ {
+ var stream = new MemoryStream();
+ var output = new CodedOutputStream(stream);
+ for (int i = 0; i < CodedInputStream.DefaultRecursionLimit + 1; i++)
+ {
+ output.WriteTag(1, WireFormat.WireType.StartGroup);
+ }
+ for (int i = 0; i < CodedInputStream.DefaultRecursionLimit + 1; i++)
+ {
+ output.WriteTag(1, WireFormat.WireType.EndGroup);
+ }
+ output.Flush();
+ stream.Position = 0;
+
+ // Now act like a generated client
+ var input = new CodedInputStream(stream);
+ Assert.AreEqual(WireFormat.MakeTag(1, WireFormat.WireType.StartGroup), input.ReadTag());
+ Assert.Throws<InvalidProtocolBufferException>(() => input.SkipLastField());
+ }
+
+ [Test]
+ public void Construction_Invalid()
+ {
+ Assert.Throws<ArgumentNullException>(() => new CodedInputStream((byte[]) null));
+ Assert.Throws<ArgumentNullException>(() => new CodedInputStream(null, 0, 0));
+ Assert.Throws<ArgumentNullException>(() => new CodedInputStream((Stream) null));
+ Assert.Throws<ArgumentOutOfRangeException>(() => new CodedInputStream(new byte[10], 100, 0));
+ Assert.Throws<ArgumentOutOfRangeException>(() => new CodedInputStream(new byte[10], 5, 10));
+ }
+
+ [Test]
+ public void CreateWithLimits_InvalidLimits()
+ {
+ var stream = new MemoryStream();
+ Assert.Throws<ArgumentOutOfRangeException>(() => CodedInputStream.CreateWithLimits(stream, 0, 1));
+ Assert.Throws<ArgumentOutOfRangeException>(() => CodedInputStream.CreateWithLimits(stream, 1, 0));
+ }
+ }
+}
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