/// <summary>
/// Checks that the evaluated bool is true.
/// </summary>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="condition">An expression that must evaluate to true, or it will fail the validation.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is not true.</exception>
public static AssumptionValidation IsTrue(this AssumptionValidation validation, bool condition)
{
if (!condition)
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated bool is false.
/// </summary>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="condition">An expression that must evaluate to false, or it will fail the validation.</param>
/// <param name="message">An optional message to throw with the exception.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is not false.</exception>
public static AssumptionValidation IsFalse(this AssumptionValidation validation, bool condition, string message)
{
if (condition)
{
return(validation.SetException(new InternalErrorException(message)));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated string is not null or empty.
/// </summary>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="value">The string to be evaluated.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is <c>null</c> or empty.</exception>
public static AssumptionValidation IsNotNullOrEmpty(this AssumptionValidation validation, string value)
{
if (String.IsNullOrEmpty(value))
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated result is null.
/// </summary>
/// <typeparam name="T">The type to be evaluated.</typeparam>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="value">The value to be evaluated.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is not <c>null</c>.</exception>
public static AssumptionValidation IsNull <T>(this AssumptionValidation validation, T value)
where T : class
{
if (value != null)
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
public static AssumptionValidation IsNotNull <T>(this AssumptionValidation validation, T?value)
where T : struct
{
if (!value.HasValue)
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated enumerable is not null or empty.
/// </summary>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="enumerable">The enumerable to be evaluated.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is <c>null</c> or empty.</exception>
public static AssumptionValidation IsNotNullOrEmpty <T>(this AssumptionValidation validation, T enumerable)
where T : IEnumerable
{
if (enumerable == null || enumerable.IsEnumEmpty())
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated result is its default value.
/// </summary>
/// <typeparam name="T">The type to be evaluated.</typeparam>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="value">The value to be evaluated.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the value is not its default value.</exception>
public static AssumptionValidation IsDefault <T>(this AssumptionValidation validation, T value)
where T : struct
{
if (!value.Equals(default(T)))
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}
/// <summary>
/// Checks that the evaluated service object is not null.
/// </summary>
/// <param name="validation">The current assumptions that is being validated.</param>
/// <param name="service">The service to verify existance.</param>
/// <returns>The current assumptions that is being validated.</returns>
/// <exception cref="InternalErrorException">Thrown if the service is null.</exception>
public static AssumptionValidation IsServicePresent <T>(this AssumptionValidation validation, T service)
{
if (service == null)
{
#if NET35
var coreType = typeof(T);
#else
var coreType = Helpers.TrimGenericWrapper(typeof(T), typeof(Lazy <>));
#endif
return(validation.SetException(new InternalErrorException(Format(Strings.ServiceMissing, coreType.FullName))));
}
return(validation);
}
public static AssumptionValidation IsType <T>(this AssumptionValidation validation, object value)
{
if (value == null)
{
return(validation);
}
if (!(value is T))
{
return(validation.SetException(new InternalErrorException()));
}
return(validation);
}