public void testVisitFunctionExp()
{
setup("log(100)");
FunctionExpContext context = parser.expression() as FunctionExpContext;
DoubleSpreadsheetVisitor visitor = new DoubleSpreadsheetVisitor();
double result = visitor.VisitFunctionExp(context);
Assert.Equal(result, double.Parse("2"));
}
public void testWrongVisitFunctionExp()
{
setup("logga(100)");
FunctionExpContext context = parser.expression() as FunctionExpContext;
DoubleSpreadsheetVisitor visitor = new DoubleSpreadsheetVisitor();
double result = visitor.VisitFunctionExp(context);
CommonTokenStream ts = (CommonTokenStream)parser.InputStream;
// this is syntactically correct and would be true even for a good function
Assert.Equal(SpreadsheetLexer.NAME, ts.Get(0).Type);
Assert.Equal(null, errorListener.Symbol);
// we choose to return 0 if we can't the find function with that NAME
// so that's how we know is wrong
Assert.Equal(0, result);
}
