IronRuby.Tests.Tests.MutableString_SwitchRepr C# (CSharp) Method

        public void MutableString_SwitchRepr() {
            // \u{12345} in UTF-8:
            var u12345 = new byte[] { 0xF0, 0x92, 0x8D, 0x85 };
            var u215c = new byte[] { 0xE2, 0x85, 0x9C };

            var surrogate = MS(u12345, RubyEncoding.UTF8);
            surrogate.Append('x');
            Assert(surrogate.GetCharCount() == 3);
            Assert(surrogate.ToString() == Encoding.UTF8.GetString(u12345) + "x");

            var result = MutableString.AppendUnicodeRepresentation(new StringBuilder(), Encoding.UTF8.GetString(u12345), MutableString.Escape.NonAscii, -1, -1);
            Assert(result.ToString() == "\\u{12345}");

            result = MutableString.AppendUnicodeRepresentation(new StringBuilder(), Encoding.UTF8.GetString(u215c), MutableString.Escape.NonAscii, -1, -1);
            Assert(result.ToString() == "\\u{215c}");

            //var incompleteChar = MS(new byte[] { 0xF0, 0x92 }, RubyEncoding.UTF8);
            //AssertExceptionThrown<DecoderFallbackException>(() => incompleteChar.Append('x'));

            // TODO:
            // var e = RubyEncoding.GetRubyEncoding(new NonInvertibleEncoding());
        }