public void testCompleteExp()
{
setup("log(5+6*7/8)");
ExpressionContext context = parser.expression();
SpreadsheetVisitor visitor = new SpreadsheetVisitor();
double result = visitor.Visit(context);
Assert.Equal("1.01072386539177", result.ToString(System.Globalization.CultureInfo.GetCultureInfo("en-US").NumberFormat));
}
public void testVisitPowerExp()
{
setup("4^3^2");
PowerExpContext context = parser.expression() as PowerExpContext;
SpreadsheetVisitor visitor = new SpreadsheetVisitor();
double result = visitor.VisitPowerExp(context);
Assert.Equal(double.Parse("262144"), result);
}
public void testVisitFunctionExp()
{
setup("log(100)");
FunctionExpContext context = parser.expression() as FunctionExpContext;
SpreadsheetVisitor visitor = new SpreadsheetVisitor();
double result = visitor.VisitFunctionExp(context);
Assert.Equal(result, double.Parse("2"));
}
static void Main(string[] args)
{
string input = "log(10 + A1 * 35 + (5.4 - 7.4))";
AntlrInputStream inputStream = new AntlrInputStream(input);
SpreadsheetLexer spreadsheetLexer = new SpreadsheetLexer(inputStream);
CommonTokenStream commonTokenStream = new CommonTokenStream(spreadsheetLexer);
SpreadsheetParser spreadsheetParser = new SpreadsheetParser(commonTokenStream);
SpreadsheetParser.ExpressionContext expressionContext = spreadsheetParser.expression();
SpreadsheetVisitor visitor = new SpreadsheetVisitor();
Console.WriteLine(visitor.Visit(expressionContext));
}
public void testWrongVisitFunctionExp()
{
setup("logga(100)");
FunctionExpContext context = parser.expression() as FunctionExpContext;
SpreadsheetVisitor visitor = new SpreadsheetVisitor();
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);
}
