public void ForbidChars_String() { // Arrange var filter = new TextEncoderSettings(UnicodeRanges.BasicLatin); filter.ForbidCharacters('x', 'z'); // Assert Assert.True(filter.IsCharacterAllowed('w')); Assert.False(filter.IsCharacterAllowed('x')); Assert.True(filter.IsCharacterAllowed('y')); Assert.False(filter.IsCharacterAllowed('z')); }