public void TestTokenizerSeeking()
{
const string json = "{ \"a\": \"5b47eb0936ff92a567a0307e\", \"b\": false }";
var bytes = Encoding.UTF8.GetBytes(json);
var tokeniser = new JsonTokenizer(bytes);
TestStep(tokeniser, TokenType.ObjectStart, "{");
TestStep(tokeniser, TokenType.String, "\"a\"");
var pos = tokeniser.Position;
TestStep(tokeniser, TokenType.ObjectKeyDelim, ":");
// reset and read same token
tokeniser.Seek(pos);
TestStep(tokeniser, TokenType.ObjectKeyDelim, ":");
TestStep(tokeniser, TokenType.String, "\"5b47eb0936ff92a567a0307e\"");
}