public void ReturnTrueAndMatchMessage_WhenArgumentIsNotNull()
{
// Arrange.
object value = new object();
// Act.
IValidationPredicateResult result = NotNullValidationPredicate<object>.Instance.Match(value);
// Assert.
Assert.IsTrue(result.IsMatch);
Assert.AreEqual("Argument value <System.Object> is not null.", result.Message);
}