public void CreateAndEvaluateCompositeExpressionWithTwoConstants()
{
IExpression expr1 = new ConstantExpression(1);
IExpression expr2 = new ConstantExpression(2);
CompositeExpression expr = new CompositeExpression(new IExpression[] { expr1, expr2 });
Assert.IsFalse(expr.HasVariable());
Assert.IsNotNull(expr.Expressions);
Assert.AreEqual(2, expr.Expressions.Count);
Assert.AreSame(expr1, expr.Expressions[0]);
Assert.AreSame(expr2, expr.Expressions[1]);
var result = expr.Evaluate(null);
Assert.AreEqual(2, result);
}
public void CreateAndEvaluateCompositeExpressionWithTwoVariables()
{
IExpression expr1 = new VariableExpression(new Variable("X"));
IExpression expr2 = new VariableExpression(new Variable("Y"));
Context context = new Context();
context.SetValue("X", 1);
context.SetValue("Y", 2);
CompositeExpression expr = new CompositeExpression(new IExpression[] { expr1, expr2 });
Assert.IsTrue(expr.HasVariable());
Assert.IsNotNull(expr.Expressions);
Assert.AreEqual(2, expr.Expressions.Count);
Assert.AreSame(expr1, expr.Expressions[0]);
Assert.AreSame(expr2, expr.Expressions[1]);
var result = expr.Evaluate(context);
Assert.AreEqual(2, result);
}