/// <summary>
/// extract the selector
/// </summary>
/// <param name="parameter"></param>
/// <param name="context"></param>
/// <param name="jsonNamingPolicy"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
/// <exception cref="ArgumentNullException"></exception>
private static ExpressionValue GetSelector <T>(ParameterExpression parameter,
RSqlQueryParser.ComparisonContext context,
JsonNamingPolicy jsonNamingPolicy)
{
var result = ExpressionValue.Parse <T>(parameter, context.selector().GetText(), jsonNamingPolicy);
return(result ?? throw new ComparisonUnknownSelectorException(context));
}
public void ShouldBeThrowArgumentNullException()
{
// parameter = null
this.Invoking((a) => ExpressionValue.Parse <Customer>(null, "test", null))
.Should().Throw <ArgumentNullException>();
// selector = null
this.Invoking((a) => ExpressionValue.Parse <Customer>(Expression.Parameter(typeof(Customer)), null, null))
.Should().Throw <ArgumentNullException>();
// selector = string .empty
this.Invoking((a) => ExpressionValue.Parse <Customer>(Expression.Parameter(typeof(Customer)), String.Empty, null))
.Should().Throw <ArgumentNullException>();
}