public void FindFirstCharToEncodeUtf8_IllFormedData_ReturnsIndexOfIllFormedSubsequence(byte[] utf8Data, int expectedIndex)
{
// Arrange
var encoder = new ConfigurableScalarTextEncoder(_ => true /* allow everything */);
// Act
int actualIndex = encoder.FindFirstCharacterToEncodeUtf8(utf8Data);
// Assert
Assert.Equal(expectedIndex, actualIndex);
}
public void FindFirstCharToEncodeUtf8_EmptyInput_ReturnsNegOne()
{
// Arrange
var encoder = new ConfigurableScalarTextEncoder(_ => false /* disallow everything */);
// Act
int idxOfFirstByteToEncode = encoder.FindFirstCharacterToEncodeUtf8(ReadOnlySpan <byte> .Empty);
// Assert
Assert.Equal(-1, idxOfFirstByteToEncode);
}
public void FindFirstCharToEncodeUtf8_WellFormedData_SomeCharsDisallowed()
{
// Arrange
byte[] inputBytes = Encoding.UTF8.GetBytes("\U00000040\U00000400\U00004000\U00040000"); // code units of different lengths
var encoder = new ConfigurableScalarTextEncoder(codePoint => codePoint != 0x4000 /* disallow U+4000, allow all else */);
// Act
int idxOfFirstByteToEncode = encoder.FindFirstCharacterToEncodeUtf8(inputBytes);
// Assert
Assert.Equal(3, idxOfFirstByteToEncode);
}
public void FindFirstCharToEncodeUtf8_WellFormedData_AllCharsAllowed()
{
// Arrange
byte[] inputBytes = Encoding.UTF8.GetBytes("\U00000040\U00000400\U00004000\U00040000"); // code units of different lengths
var encoder = new ConfigurableScalarTextEncoder(_ => true /* allow everything */);
// Act
int idxOfFirstByteToEncode = encoder.FindFirstCharacterToEncodeUtf8(inputBytes);
// Assert
Assert.Equal(-1, idxOfFirstByteToEncode);
}