private static (object value, string error) Evaluator(Expression expression, IMemory state, Options options)
{
TimexProperty parsed = null;
string value = null;
string error = null;
IReadOnlyList <object> args;
(args, error) = FunctionUtils.EvaluateChildren(expression, state, options);
if (error == null)
{
(parsed, error) = FunctionUtils.ParseTimexProperty(args[0]);
}
// if the parsed TimexProperty has no types, then it cannot be resolved
if (error == null && parsed.Types.Count == 0)
{
error = $"The parsed TimexProperty of {args[0]} in {expression} has no types. It can't be resolved to a string value.";
}
if (error == null)
{
var formatedTimex = TimexFormat.Format(parsed);
try
{
var resolvedValues = TimexResolver.Resolve(new string[] { formatedTimex });
value = resolvedValues.Values[0].Value;
}
catch (ArgumentException err)
{
error = $"{args[0]} in {expression} is not a valid argument. {err.Message}";
}
}
return(value, error);
}
public void DataTypes_Creator_Today()
{
var d = System.DateTime.Now;
var expected = TimexFormat.Format(new TimexProperty
{
Year = d.Year,
Month = d.Month,
DayOfMonth = d.Day
});
Assert.AreEqual(expected, TimexCreator.Today());
}
public void DataTypes_Creator_WeekBackFromToday()
{
var d = System.DateTime.Now;
d = d.AddDays(-7);
var expected = TimexFormat.Format(new TimexProperty
{
Year = d.Year,
Month = d.Month,
DayOfMonth = d.Day,
Days = 7
});
Assert.AreEqual(expected, TimexCreator.WeekBackFromToday());
}