public void assert_not_whitespace()
{
Assert.Throws <ArgumentNullException>(() => Assertion.NotWhitespace(null));
Assert.Throws <ArgumentException>(() => Assertion.NotWhitespace(string.Empty));
Assert.Throws <ArgumentException>(() => Assertion.NotWhitespace(" "));
Assertion.NotWhitespace(" a ");
Assertion.NotWhitespace("test");
}