public static IEnumerable <Base> SelectNew(this Base input, string expression, FhirEvaluationContext ctx = null)
{
var inputNav = input.ToTypedElement();
var result = inputNav.Select(expression, ctx ?? FhirEvaluationContext.CreateDefault());
return(ToFhirValues(result));
}
public void ResolveOnEmptyTest()
{
// resolve should handle an empty collection as input
var symbolTable = new SymbolTable();
symbolTable.AddStandardFP();
symbolTable.AddFhirExtensions();
var compiler = new FhirPathCompiler(symbolTable);
var evaluator = compiler.Compile("{}.resolve()");
var result = evaluator(null, FhirEvaluationContext.CreateDefault());
Assert.IsFalse(result.Any());
}