public void IsWellFormedUtf8String_WithStringOfAllPossibleScalarValues_ReturnsTrue()
{
// Arrange
byte[] allScalarsAsUtf8 = _utf8EncodingWithoutReplacement.GetBytes(_stringWithAllScalars.Value);
var buffer = NativeMemory.AllocateFromExistingData(allScalarsAsUtf8, PoisonPagePlacement.AfterSpan);
buffer.MakeReadonly();
// Act & assert
Assert.True(Utf8Utility.IsWellFormedUtf8String(buffer.Span));
buffer.Dispose();
}
public void IsWellFormedUtf8String_WithCorruptedStringOfAllPossibleScalarValues_ReturnsFalse()
{
// Arrange
byte[] allScalarsAsUtf8 = _utf8EncodingWithoutReplacement.GetBytes(_stringWithAllScalars.Value);
allScalarsAsUtf8[0x1000] ^= 0x80; // modify the high bit of one of the characters, which will corrupt the header
var buffer = NativeMemory.AllocateFromExistingData(allScalarsAsUtf8, PoisonPagePlacement.AfterSpan);
buffer.MakeReadonly();
// Act & assert
Assert.False(Utf8Utility.IsWellFormedUtf8String(buffer.Span));
buffer.Dispose();
}