public void TestOperations()
{
var table = new ResultTable();
table.Columns.Add(new ColumnRef("a"));
table.Columns.Add(new ColumnRef("b"));
table.Columns.Add(new ColumnRef("c"));
table.Columns.Add(new ColumnRef("d"));
var row = table.NewRow();
row.Add(new object[] { 1, 432, 24.42d, 0.256m });
var computeAddInt = new Addition(new ColumnRef("a"), new ColumnRef("b"));
Assert.Equal(433, computeAddInt.Eval(row));
var computeAddDouble = new Addition(new ColumnRef("c"), new ColumnRef("c"));
Assert.Equal(48.84, computeAddDouble.Eval(row));
var computeAddDecimal = new Addition(new ColumnRef("d"), new ColumnRef("d"));
Assert.Equal(0.512m, computeAddDecimal.Eval(row));
var computeAddMixed = new Addition(new ColumnRef("c"), new ColumnRef("d"));
Assert.Equal(24.676m, computeAddMixed.Eval(row));
var computeSubInt = new Subtraction(new ColumnRef("a"), new ColumnRef("b"));
Assert.Equal(-431, computeSubInt.Eval(row));
var computeSubDouble = new Subtraction(new ColumnRef("c"), new ColumnRef("c"));
Assert.Equal(0d, computeSubDouble.Eval(row));
var computeSubDecimal = new Subtraction(new ColumnRef("d"), new ColumnRef("d"));
Assert.Equal(0m, computeSubDecimal.Eval(row));
var computeSubMixed = new Subtraction(new ColumnRef("c"), new ColumnRef("d"));
Assert.Equal(24.164m, computeSubMixed.Eval(row));
var computeMulInt = new Multiplication(new ColumnRef("a"), new ColumnRef("b"));
Assert.Equal(432, computeMulInt.Eval(row));
var computeMulDouble = new Multiplication(new ColumnRef("c"), new ColumnRef("c"));
Assert.Equal(24.42d * 24.42d, computeMulDouble.Eval(row));
var computeMulDecimal = new Multiplication(new ColumnRef("d"), new ColumnRef("d"));
Assert.Equal(0.065536m, computeMulDecimal.Eval(row));
var computeMulMixed = new Multiplication(new ColumnRef("c"), new ColumnRef("d"));
Assert.Equal(6.25152m, computeMulMixed.Eval(row));
var computeDivInt = new Division(new ColumnRef("a"), new ColumnRef("b"));
Assert.Equal(0, computeDivInt.Eval(row));
var computeDivDouble = new Division(new ColumnRef("c"), new ColumnRef("c"));
Assert.Equal(24.42d / 24.42d, computeDivDouble.Eval(row));
var computeDivDecimal = new Division(new ColumnRef("d"), new ColumnRef("d"));
Assert.Equal(1m, computeDivDecimal.Eval(row));
var computeDivMixed = new Division(new ColumnRef("c"), new ColumnRef("d"));
Assert.Equal(95.390625m, computeDivMixed.Eval(row));
}