public void MultipleExpressionsWithNullResult()
{
var eval = new FormulaEvaluator();
eval.AddVariable("a", null);
eval.AddVariable("b", 1);
eval.Evaluate("{{a}}{{b}}").Should().Be(1);
eval.Evaluate("{{b}}{{a}}").Should().Be("1");
}
public void FormulaEvaluatorTests1()
{
var eval = new FormulaEvaluator();
eval.AddVariable("a", 2);
eval.AddVariable("b", 3);
eval.Evaluate("{{\"test\"}}").Should().Be("test");
eval.Evaluate("{{a+b}}").Should().Be(5);
eval.Evaluate("{{c}}+{{d}}={{c+d}}", new Parameter("c", 3), new Parameter("d", 6)).Should().Be("3+6=9");
eval.Evaluate("{{c}}+{{d}}={{c+d}}", new Parameter("c", 7), new Parameter("d", 8)).Should().Be("7+8=15");
}
public void EvalExpressionVariableWithAt()
{
var eval = new FormulaEvaluator();
eval.AddVariable("@a", 1);
eval.Evaluate("{{@a+@a}}").Should().Be(2);
}
public void UsingDynamicLinqTypeTest()
{
var eval = new FormulaEvaluator();
eval.AddVariable("a", "1");
eval.Evaluate("{{EvaluateUtils.ParseAsInt(a).IncrementMe()}}").Should().Be(2);
}
public GlobalTestSetup()
{
//Warm-up DynamicExpressionParser
var evaluator = new FormulaEvaluator();
evaluator.AddVariable("item", "warm-up");
evaluator.Evaluate("&={{item.Length}}");
}
public void ExpressionParseTestNullPropagation()
{
var customers = new Customer[]
{
new Customer {
Id = 1, Name = "Customer1", Manager = new Customer {
Id = 3, Name = "Manager1"
}
},
new Customer {
Id = 2, Name = "Customer2", Manager = null
}
};
var eval = new FormulaEvaluator();
eval.AddVariable("a", customers[0]);
eval.AddVariable("b", customers[1]);
eval.Evaluate(@"{{np(a.Manager.Name, ""test"")}}").Should().Be("Manager1");
eval.Evaluate(@"{{np(b.Manager.Name, ""test"")}}").Should().Be("test");
eval.Evaluate(@"{{np(b.Manager.Name, null)}}").Should().BeNull();
}
public void UsingLambdaExpressionsIssue212()
{
var customers = new object[10000];
for (int i = 0; i < customers.Length; i++)
{
customers[i] = new Customer {
Id = i, Name = "Customer" + i
};
}
var eval = new FormulaEvaluator();
eval.AddVariable("items", customers);
eval.Evaluate("{{items.Count(c => c.Id == 9999)}}").Should().Be(1);
eval.Evaluate("{{items.Select(i => i.Name).Skip(1000).First()}}").Should().Be("Customer1000");
}
public void EvalMixedArray()
{
var mixed = new object[] {
"string",
1,
0.1,
System.DateTime.Today,
};
var eval = new FormulaEvaluator();
eval.AddVariable("mixed", mixed);
eval.Evaluate("{{mixed.Count()}}").Should().Be(4);
foreach (var item in mixed)
{
eval.Evaluate("{{item}}", new Parameter("item", item));
}
}
