/// <summary>
/// Determines if a string really is an uppercase string.
/// </summary>
public static bool IsValid(this LowercaseString lowercaseString)
{
// Is the result of ToLowerInvariant() the same as the input?
var lowered = lowercaseString.Value.ToLowerInvariant();
var output = lowercaseString.Value == lowered;
return(output);
}
/// <summary>
/// Throw an <see cref="Exception"/> if the upper-case string value is invalid.
/// </summary>
public static void Validate(this LowercaseString lowercaseString)
{
var isValid = lowercaseString.IsValid();
if (!isValid)
{
throw new Exception($"Value '{lowercaseString.Value}' was not a lower-case string.");
}
}
public static bool TryValidate(this LowercaseStringUnvalidated lowercaseStringUnvalidated, out LowercaseString lowercaseString)
{
var isValid = lowercaseStringUnvalidated.IsValid();
if (isValid)
{
lowercaseString = new LowercaseString(lowercaseStringUnvalidated.Value);
}
else
{
lowercaseString = LowercaseString.Invalid;
}
return(isValid);
}