public static AssertionContext <String> FileExists(this AssertionContext <String> source)
{
if (File.Exists(source.Value))
{
return(source);
}
else
{
throw new ArgumentException(String.Format(Properties.Resources.Assert_FileExists, source.Name, source.Value));
}
}
public static AssertionContext <SqlConnection> IsOpen(this AssertionContext <SqlConnection> value)
{
if (value.Value.State == ConnectionState.Open)
{
return(value);
}
else
{
throw new ArgumentException(String.Format(Utilities.Sql.Properties.Resources.Assert_IsOpen, value.Name));
}
}
public static AssertionContext <String> NotOnlyWhitespace(this AssertionContext <String> source)
{
if (source.Value.Trim() != "")
{
return(source);
}
else
{
throw new ArgumentException(String.Format(Properties.Resources.Assert_StringIsAllWhitespace, source.Name));
}
}
public static AssertionContext <T> BetweenExclusive <T>(this AssertionContext <T> source, T lowerBound, T upperBound)
where T : IComparable <T>
{
if ((source.Value.CompareTo(lowerBound) > 0) && (source.Value.CompareTo(upperBound) < 0))
{
return(source);
}
else
{
throw new ArgumentException(String.Format(Properties.Resources.Assert_BetweenExclusive, source.Name, source.Value, lowerBound, upperBound));
}
}
public static AssertionContext <T> NotEqualTo <T>(this AssertionContext <T> source, T value)
where T : IComparable <T>
{
if (source.Value.CompareTo(value) != 0)
{
return(source);
}
else
{
throw new ArgumentException(String.Format(Properties.Resources.Assert_EqualTo, source.Name, source.Value, value));
}
}
public static AssertionContext <T> NotNull <T>(this AssertionContext <T> source)
where T : class
{
if (source.Value != null)
{
return(source);
}
else
{
throw new ArgumentNullException(source.Name);
}
}
public static AssertionContext <T> NotEmpty <T>(this AssertionContext <T> source)
where T : IEnumerable
{
/* Some non-generic IEnumerator enumerators returned by IEnumerable.GetEnumerator()
* implement IDisposable, while others do not. Those enumerators
* that do implement IDisposable will need to have their Dispose() method called.
*
* A non-generic IEnumerator cannot be used in a "using" statement.
* So to make sure Dispose() is called (if it exists), "foreach" is used
* because it will generate code to dispose of the IEnumerator
* if the enumerator also implements IDisposable. */
/* This loop will execute zero or more times,
* and the foreach will dispose the enumerator, if necessary. */
foreach (var _ in source.Value)
{
return(source); /* Loop executed once. There is at least one element in the IEnumerable, which means it's not empty. */
}
/* Loop executed zero times, which means the IEnumerable is empty. */
throw new ArgumentException(String.Format(Properties.Resources.Assert_ContainerIsEmpty, source.Name));
}
public static AssertionContext <String> NotNullEmptyOrOnlyWhitespace(this AssertionContext <String> source)
{
return(source.NotNull().NotEmpty().NotOnlyWhitespace());
}
public static AssertionContext <T> Name <T>(this AssertionContext <T> source, String name)
{
source.Name = name;
return(source);
}