Trustsoft.Conditions

An extremely easy to use library that helps to check method arguments by conditions.

Usage:

// --- Requires.That() --- // Requires.That will throw an exception, when some condition is not held public void FirstMethod(int arg1, int arg2) { // This line will throw an exception when arg1 >= arg2 Requires.That(() => arg1).IsLessThan(arg2); // This will check that arg2 // - is in range 1..46 Requires.That(arg2, "arg2").IsInRange(1,46); // Several checks can be added. Requires.That(arg1).IsInRange(100,1000).IsEven().IsTrue(x => x > 50, "Must be over 500"); // Do something } // --- Validate.That() --- // Validate.That makes possible to get a list of all error conditions public void SecondMethod(string arg1) { // Get a list of errors IEnumerable<KeyValuePair<ViolationType, string>> errors = Validate.That(() => arg1).IsNotNull().GetErrors(); }

Complete list of checks:

The following checks are available. New checks can easily be made by creating an extension method.

For object:

• Evaluate
• IsNull
• IsNotNull
• IsOfType
• IsNotOfType

For Nullable:

• IsNull
• IsNotNull

For Guid:

• IsEmpty
• IsNotEmpty

For bool and bool?:

• IsTrue
• IsFalse

For int and long (and other numeric types):

• IsNegative, IsNotNegative
• IsPositive, IsNotPositive
• IsInRange, IsNotInRange
• IsGreaterThan, IsNotGreaterThan
• IsGreaterOrEqual, IsNotGreaterOrEqual
• IsLessThan, IsNotLessThan
• IsLessOrEqual, IsNotLessOrEqual
• IsEqualTo, IsNotEqualTo
• IsOdd
• IsEven

For string:

• Contains, DoesNotContain
• IsMatch, IsNotMatch
• IsEmpty, IsNotEmpty
• IsNullOrEmpty, IsNotNullOrEmpty
• IsNullOrWhiteSpace, IsNotNullOrWhiteSpace
• StartsWith, DoesNotStartWith
• EndsWith, DoesNotEndWith
• HasLength, DoesNotHaveLength
• IsShorterThan, IsShorterOrEqual
• IsLongerThan, IsLongerOrEqual

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

• IsInRange, IsNotInRange
• IsGreaterThan, IsNotGreaterThan
• IsGreaterOrEqual, IsNotGreaterOrEqual
• IsLessThan, IsNotLessThan
• IsLessOrEqual, IsNotLessOrEqual
• IsEqualTo, IsNotEqualTo

For IEnumerable:

• IsEmpty, IsNotEmpty