public static void AssertNotNullOrWhiteSpace(this string arg, string argName)
 {
     ArgumentHelper.AssertNotNullOrWhiteSpace(arg, argName);
 }
 public void assert_not_null_or_white_space_throws_if_string_contains_only_white_space()
 {
     Assert.Throws <ArgumentException>(() => ArgumentHelper.AssertNotNullOrWhiteSpace("  \t     \r \n  ", "test"));
 }
 public void assert_not_null_or_white_space_does_not_throw_if_string_is_not_entirely_white_space()
 {
     ArgumentHelper.AssertNotNullOrWhiteSpace("  a ", "test");
 }
 public void assert_not_null_or_white_space_throws_if_string_is_empty()
 {
     Assert.Throws <ArgumentException>(() => ArgumentHelper.AssertNotNullOrWhiteSpace(string.Empty, "test"));
 }