public void ToDoubleTestOrNullTest(object value, bool expected)
{
var actual = DoubleHelper.ToDoubleOrNull(value);
var isDefaultResult = actual == null;
if (!isDefaultResult)
{
actual = DoubleHelper.ToDoubleOrNull(value);
isDefaultResult = actual == null;
}
Assert.Equal(expected, isDefaultResult);
}
private static Expression <Func <TModel, bool> > ToDoubleValueExpression <TModel>(FilterItemModel filterItem, bool isNullable)
where TModel : class
{
var nullableFilterValue = DoubleHelper.ToDoubleOrNull(filterItem.Value);
if (!nullableFilterValue.HasValue)
{
throw new ArgumentException($"{filterItem.Value} is not of type {typeof(double)}.");
}
var filterValue = nullableFilterValue.Value;
if (isNullable)
{
var entityParamSelector = ReflectionHelper.MemberSelector <TModel, double?>(filterItem.Column);
if (filterItem.Filter == FilterType.In)
{
var result = filterItem.CollectionExpression(entityParamSelector, DoubleHelper.ToDoubleOrNull);
if (result != null)
{
return(result);
}
}
var expression = FilterExpressionHelper.GetNullableExpression(filterItem.Filter, filterValue);
return(entityParamSelector.CombineSelectorParamExpression(expression));
}
else
{
var entityParamSelector = ReflectionHelper.MemberSelector <TModel, double>(filterItem.Column);
if (filterItem.Filter == FilterType.In)
{
var result = filterItem.CollectionExpression(entityParamSelector, DoubleHelper.ToDouble);
if (result != null)
{
return(result);
}
}
var expression = FilterExpressionHelper.GetExpression(filterItem.Filter, filterValue);
return(entityParamSelector.CombineSelectorParamExpression(expression));
}
}
