CodeGuard

A simple Guard and validator library made in c#. Library also available at NuGet.

Need more checks?? Please contribute or contact me.

Example of usage:

// --- using Guard.That(...) ---
// Guard.That that will throw an exception, when some condition is not met

public void SomeMethod(int arg1, int arg2)
{
	// This will check that arg1 is not null and that is in some range 1..100
	Guard.That(arg2).IsNotNull().IsInRange(1,100);

	// Several checks can be added.
	Guard.That(arg1).IsInRange(100,1000).IsEven().IsTrue(x => x > 50, "Must be over 500");

	// Do stuff
}

Incomplete list of checks:

The following checks are available. But the best documentation is currently the tests. New checks can easily be made by creating a extension method.

For object:

• Is
• IsNotDefault

For bool:

• IsTrue
• IsFalse

For class:

• IsNotNull

For IComparable (Int32, Double, String, Char, DateTime and other classes implementing the interface)

• IsEqual
• IsNotEqual
• IsGreatherThan
• IslessThan
• IsInRange

For int and long:

• IsOdd
• IsEven
• IsPrime

For string:

• IsNotEmpty
• IsNotNullOrEmpty
• StartsWith
• EndsWith
• Length
• Contains
• IsMatch

For IEnumerable:

• IsNotEmpty
• Length
• Conatins

For Guid:

• IsNotEmpty

Benchmarks of checks:

Check	Max. overhead
Enumerable
IsNotEmpty	x1.75
Length	x1.75
Contains by value	x1.1
Contains by predicate	x1.1
Array
IsNotEmpty	x8.6
CountIs	x9
Boolean
IsTrue	x5.4
IsFalse	x5.4
Collection
IsNotEmpty	x3.5