public void TestAstPrinter()
{
string result;
using (StringWriter writer = new StringWriter())
using (AstPrinter printer = new AstPrinter(writer))
{
Expr expression = new Expr.Binary(
new Expr.Unary(
new Token(TokenType.MINUS, "-", null, 1),
new Expr.Literal(123)),
new Token(TokenType.STAR, "*", null, 1),
new Expr.Grouping(
new Expr.Literal(45.67)));
printer.Write(expression);
result = writer.ToString();
}
string expected = "(* (- 123) (group 45.67))";
Assert.AreEqual(expected, result);
}
