public void TestTokenizerKey()
{
Tokenizer tokenizer = new Tokenizer(new ExpressionDictionary(), "@book{ aaker:1912, }");
List<AbstractToken> tokens = tokenizer.GetAllTokens().ToList();
Assert.AreEqual(6, tokens.Count());
Assert.AreEqual(new At("@"), tokens[0]);
Assert.AreEqual(new Text("book", 1), tokens[1]);
Assert.AreEqual(new OpeningBrace("{", 5), tokens[2]);
Assert.AreEqual(new Text(" aaker:1912", 6), tokens[3]);
Assert.AreEqual(new Comma(",", 17), tokens[4]);
Assert.AreEqual(new ClosingBrace(" }", 18), tokens[5]);
}