public static void TryReadByteString_SingleValue_HappyPath(string hexExpectedValue, string hexEncoding)
{
byte[] buffer = new byte[32];
byte[] encoding = hexEncoding.HexToByteArray();
byte[] expectedValue = hexExpectedValue.HexToByteArray();
var reader = new CborReader(encoding);
bool result = reader.TryReadByteString(buffer, out int bytesWritten);
Assert.True(result);
Assert.Equal(expectedValue.Length, bytesWritten);
Assert.Equal(expectedValue, buffer[..bytesWritten]);
public static void ReadEncodedValue_NestedValue_HappyPath(string hexEncoding)
{
byte[] encoding = $"8301{hexEncoding}60".HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartArray();
reader.ReadInt64();
byte[] encodedValue = reader.ReadEncodedValue().ToArray();
Assert.Equal(hexEncoding, encodedValue.ByteArrayToHex().ToLower());
}
public static void SkipValue_NestedValue_HappyPath(string hexEncoding)
{
byte[] encoding = $"8301{hexEncoding}03".HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartArray();
reader.ReadInt64();
reader.SkipValue();
reader.ReadInt64();
reader.ReadEndArray();
Assert.Equal(CborReaderState.Finished, reader.Peek());
}
public static void ReadEndMap_ImbalancedCall_ShouldThrowInvalidOperationException(string hexEncoding, int depth)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
for (int i = 0; i < depth; i++)
{
reader.ReadStartArray();
}
Assert.Throws <InvalidOperationException>(() => reader.ReadEndMap());
}
public static void PeekTag_SingleValue_HappyPath(ulong expectedTag, string hexEncoding)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
Assert.Equal(CborReaderState.Tag, reader.PeekState());
CborTag tag = reader.PeekTag();
Assert.Equal(expectedTag, (ulong)tag);
Assert.Equal(CborReaderState.Tag, reader.PeekState());
Assert.Equal(0, reader.BytesRead);
}
public static void SkipValue_NotAtValue_ShouldThrowInvalidOperationException()
{
byte[] encoding = "80".HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartArray();
int bytesRemaining = reader.BytesRemaining;
Assert.Throws <InvalidOperationException>(() => reader.SkipValue());
Assert.Equal(bytesRemaining, reader.BytesRemaining);
}
public static void ReadTag_CallingEndReadMapPrematurely_ShouldThrowInvalidOperationException(string hexEncoding)
{
// encoding is valid CBOR, so should not throw FormatException
byte[] data = hexEncoding.HexToByteArray();
var reader = new CborReader(data);
reader.ReadStartMap();
reader.ReadInt64();
reader.ReadTag();
Assert.Equal(CborReaderState.UnsignedInteger, reader.Peek());
Assert.Throws <InvalidOperationException>(() => reader.ReadEndArray());
}
public static void SkipValue_ValidationEnabled_InvalidUtf8_ShouldThrowFormatException(string hexEncoding)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
FormatException exn = Assert.Throws <FormatException>(() => reader.SkipValue(validateConformance: true));
Assert.NotNull(exn.InnerException);
Assert.IsType <DecoderFallbackException>(exn.InnerException);
Assert.Equal(encoding.Length, reader.BytesRemaining);
}
public static void Roundtrip_ByteString(string?hexInput)
{
byte[]? input = hexInput?.HexToByteArray();
#endif
using var writer = new CborWriter();
writer.WriteByteString(input);
byte[] encoding = writer.GetEncoding();
var reader = new CborReader(encoding);
byte[] result = reader.ReadByteString();
AssertHelper.HexEqual(input ?? Array.Empty <byte>(), result);
}
public static void ReadBigInteger_SingleValue_HappyPath(string expectedValueString, string hexEncoding)
{
BigInteger expectedValue = BigInteger.Parse(expectedValueString);
byte[] data = hexEncoding.HexToByteArray();
var reader = new CborReader(data);
BigInteger result = reader.ReadBigInteger();
Assert.Equal(CborReaderState.Finished, reader.PeekState());
Assert.Equal(expectedValue, result);
}
public static void ReadDecimal_SingleValue_HappyPath(string expectedStringValue, string hexEncoding)
{
decimal expectedValue = decimal.Parse(expectedStringValue, Globalization.CultureInfo.InvariantCulture);
byte[] data = hexEncoding.HexToByteArray();
var reader = new CborReader(data);
decimal result = reader.ReadDecimal();
Assert.Equal(CborReaderState.Finished, reader.PeekState());
Assert.Equal(expectedValue, result);
}
public static void ReadArray_IndefiniteLength_PrematureEndArrayCall_ShouldThrowInvalidOperationException(string hexEncoding, int length)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartArray();
for (int i = 1; i < length; i++)
{
reader.ReadInt64();
}
Assert.Throws <InvalidOperationException>(() => reader.ReadEndArray());
}
public static void ReadMap_IndefiniteLength_MissingBreakByte_ShouldReportEndOfData(string hexEncoding)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartMap();
while (reader.Peek() == CborReaderState.UnsignedInteger)
{
reader.ReadInt64();
}
Assert.Equal(CborReaderState.EndOfData, reader.Peek());
}
public static void ReadTag_SingleValue_HappyPath(ulong expectedTag, object expectedValue, string hexEncoding)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
Assert.Equal(CborReaderState.Tag, reader.PeekState());
CborTag tag = reader.ReadTag();
Assert.Equal(expectedTag, (ulong)tag);
Helpers.VerifyValue(reader, expectedValue);
Assert.Equal(CborReaderState.Finished, reader.PeekState());
}
internal static void ReadMap_UnsortedKeys_ConformanceNotRequiringSortedKeys_ShouldSucceed(CborConformanceLevel level, object[] keySequence, string hexEncoding)
{
var reader = new CborReader(hexEncoding.HexToByteArray(), level);
reader.ReadStartMap();
foreach (object key in keySequence)
{
Helpers.VerifyValue(reader, key); // verify key
reader.ReadInt32(); // value is always an integer
}
reader.ReadEndMap();
}
public static void CborReader_ReadingTwoPrimitiveValues_ShouldThrowInvalidOperationException()
{
ReadOnlyMemory <byte> buffer = new byte[] { 0, 0 };
var reader = new CborReader(buffer);
reader.ReadInt64();
Assert.Equal(CborReaderState.Finished, reader.PeekState());
int bytesRemaining = reader.BytesRemaining;
Assert.Throws <InvalidOperationException>(() => reader.ReadInt64());
Assert.Equal(bytesRemaining, reader.BytesRemaining);
}
public static void VerifyArray(CborReader reader, params object[] expectedValues)
{
Assert.Equal(CborReaderState.StartArray, reader.Peek());
ulong?length = reader.ReadStartArray();
Assert.NotNull(length);
Assert.Equal(expectedValues.Length, (int)length !.Value);
foreach (object value in expectedValues)
{
switch (value)
{
case int expected:
if (expected >= 0)
{
Assert.Equal(CborReaderState.UnsignedInteger, reader.Peek());
}
else
{
Assert.Equal(CborReaderState.NegativeInteger, reader.Peek());
}
long i = reader.ReadInt64();
Assert.Equal(expected, (int)i);
break;
case string expected:
Assert.Equal(CborReaderState.TextString, reader.Peek());
string s = reader.ReadTextString();
Assert.Equal(expected, s);
break;
case byte[] expected:
Assert.Equal(CborReaderState.ByteString, reader.Peek());
byte[] b = reader.ReadByteString();
Assert.Equal(expected, b);
break;
case object[] nested:
VerifyArray(reader, nested);
break;
default:
throw new ArgumentException($"Unrecognized argument type {value.GetType()}");
}
}
Assert.Equal(CborReaderState.EndArray, reader.Peek());
reader.ReadEndArray();
}
public static void ReadTag_NestedTagWithMissingPayload_ShouldThrowFormatException()
{
byte[] encoding = "9fc2ff".HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartArray();
reader.ReadTag();
int bytesRemaining = reader.BytesRemaining;
Assert.Equal(CborReaderState.FormatError, reader.PeekState());
Assert.Throws <FormatException>(() => reader.ReadEndArray());
Assert.Equal(bytesRemaining, reader.BytesRemaining);
}
public static void ReadUnixTimeSeconds_SingleValue_HappyPath(string expectedValueString, string hexEncoding)
{
DateTimeOffset expectedValue = DateTimeOffset.Parse(expectedValueString);
byte[] data = hexEncoding.HexToByteArray();
var reader = new CborReader(data);
DateTimeOffset result = reader.ReadUnixTimeSeconds();
Assert.Equal(CborReaderState.Finished, reader.PeekState());
Assert.Equal(expectedValue, result);
Assert.Equal(TimeSpan.Zero, result.Offset);
}
public static void SkipValue_ExtremelyNestedValues_ShouldNotStackOverflow(int depth)
{
// Construct a valid CBOR encoding with extreme nesting:
// defines a tower of `depth` nested singleton arrays,
// with the innermost array containing zero.
byte[] encoding = new byte[depth + 1];
encoding.AsSpan(0, depth).Fill(0x81); // array of length 1
encoding[depth] = 0;
var reader = new CborReader(encoding);
reader.SkipValue();
Assert.Equal(CborReaderState.Finished, reader.Peek());
}
public static void ReadMap_IndefiniteLength_OddKeyValuePairs_ShouldThrowFormatException(string hexEncoding, int length)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartMap();
for (int i = 0; i < length; i++)
{
reader.ReadInt64();
}
Assert.Equal(CborReaderState.FormatError, reader.Peek()); // don't want this to fail
Assert.Throws <FormatException>(() => reader.ReadEndMap());
}
public static void ReadBigInteger_InvalidTagPayload_ShouldRollbackToInitialState(string hexEncoding)
{
var reader = new CborReader(hexEncoding.HexToByteArray());
reader.ReadStartArray();
int bytesRead = reader.BytesRead;
int bytesRemaining = reader.BytesRemaining;
Assert.Throws <FormatException>(() => reader.ReadBigInteger());
Assert.Equal(bytesRead, reader.BytesRead);
Assert.Equal(bytesRemaining, reader.BytesRemaining);
Assert.Equal(CborReaderState.Tag, reader.PeekState());
}
public static void ReadUnixTimeSeconds_InvalidFormat_ShouldRollbackToInitialState(string hexEncoding)
{
var reader = new CborReader(hexEncoding.HexToByteArray());
reader.ReadStartArray();
int bytesRead = reader.BytesRead;
int bytesRemaining = reader.BytesRemaining;
Assert.Throws <FormatException>(() => reader.ReadUnixTimeSeconds());
Assert.Equal(bytesRead, reader.BytesRead);
Assert.Equal(bytesRemaining, reader.BytesRemaining);
Assert.Equal(CborReaderState.Tag, reader.PeekState());
Assert.Equal(CborTag.UnixTimeSeconds, reader.ReadTag());
}
public static void CborReader_MultipleRootValuesAllowed_ReadingBeyondEndOfBuffer_ShouldThrowInvalidOperationException()
{
string hexEncoding = "810102";
var reader = new CborReader(hexEncoding.HexToByteArray(), allowMultipleRootLevelValues: true);
Assert.Equal(CborReaderState.StartArray, reader.PeekState());
reader.ReadStartArray();
reader.ReadInt32();
reader.ReadEndArray();
Assert.Equal(CborReaderState.UnsignedInteger, reader.PeekState());
reader.ReadInt32();
Assert.Equal(CborReaderState.Finished, reader.PeekState());
Assert.Throws <InvalidOperationException>(() => reader.ReadInt32());
}
public static void ReadArray_IncorrectDefiniteLength_ShouldThrowFormatException(string hexEncoding, int expectedLength, int actualLength)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
ulong?length = reader.ReadStartArray();
Assert.Equal(expectedLength, (int)length !.Value);
for (int i = 0; i < actualLength; i++)
{
reader.ReadInt64();
}
Assert.Throws <FormatException>(() => reader.ReadInt64());
}
public static void EndReadArray_DefiniteLengthNotMet_ShouldThrowInvalidOperationException(string hexEncoding, int expectedLength)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
ulong?length = reader.ReadStartArray();
Assert.Equal(expectedLength, (int)length !.Value);
for (int i = 1; i < expectedLength; i++)
{
reader.ReadInt64();
}
Assert.Throws <InvalidOperationException>(() => reader.ReadEndArray());
}
public static void VerifyArray(CborReader reader, params object[] expectedValues)
{
Assert.Equal(CborReaderState.StartArray, reader.Peek());
ulong?length = reader.ReadStartArray();
Assert.NotNull(length);
Assert.Equal(expectedValues.Length, (int)length !.Value);
foreach (object value in expectedValues)
{
VerifyValue(reader, value);
}
Assert.Equal(CborReaderState.EndArray, reader.Peek());
reader.ReadEndArray();
}
public static void VerifyValue(CborReader reader, object expectedValue)
{
switch (expectedValue)
{
case int expected:
VerifyPeekInteger(reader, isUnsignedInteger: expected >= 0);
long i = reader.ReadInt64();
Assert.Equal(expected, (int)i);
break;
case long expected:
VerifyPeekInteger(reader, isUnsignedInteger: expected >= 0);
long l = reader.ReadInt64();
Assert.Equal(expected, l);
break;
case ulong expected:
VerifyPeekInteger(reader, isUnsignedInteger: true);
ulong u = reader.ReadUInt64();
Assert.Equal(expected, u);
break;
case string expected:
Assert.Equal(CborReaderState.TextString, reader.Peek());
string s = reader.ReadTextString();
Assert.Equal(expected, s);
break;
case byte[] expected:
Assert.Equal(CborReaderState.ByteString, reader.Peek());
byte[] b = reader.ReadByteString();
Assert.Equal(expected, b);
break;
case object[] nested when CborWriterTests.Helpers.IsCborMapRepresentation(nested):
VerifyMap(reader, nested);
break;
case object[] nested:
VerifyArray(reader, nested);
break;
default:
throw new ArgumentException($"Unrecognized argument type {expectedValue.GetType()}");
}
public static void ReadMap_IndefiniteLength_PrematureEndArrayCall_ShouldThrowInvalidOperationException(string hexEncoding, int length)
{
byte[] encoding = hexEncoding.HexToByteArray();
var reader = new CborReader(encoding);
reader.ReadStartMap();
for (int i = 1; i < length; i++)
{
reader.ReadInt64();
}
int bytesRemaining = reader.BytesRemaining;
Assert.Equal(CborReaderState.UnsignedInteger, reader.PeekState());
Assert.Throws <InvalidOperationException>(() => reader.ReadEndMap());
Assert.Equal(bytesRemaining, reader.BytesRemaining);
}
internal static void ReadMap_DuplicateKeys_StrictConformance_ShouldThrowFormatException(CborConformanceLevel level, object dupeKey, string hexEncoding)
{
var reader = new CborReader(hexEncoding.HexToByteArray(), level);
reader.ReadStartMap();
Helpers.VerifyValue(reader, dupeKey);
reader.ReadInt32();
int bytesRead = reader.BytesRead;
int bytesRemaining = reader.BytesRemaining;
CborReaderState state = reader.PeekState();
Assert.Throws <FormatException>(() => Helpers.VerifyValue(reader, dupeKey));
// ensure reader state is preserved
Assert.Equal(bytesRead, reader.BytesRead);
Assert.Equal(bytesRemaining, reader.BytesRemaining);
Assert.Equal(state, reader.PeekState());
}
