public void VariableNameHasOnlyAtSymbol()
 {
     Assert.AreEqual(String.Empty, RubyControlFieldExpression.GetVariableName("@"));
 }
 public void VariableNameIsEmpty()
 {
     Assert.AreEqual(String.Empty, RubyControlFieldExpression.GetVariableName(String.Empty));
 }
 public void GetVariableName()
 {
     Assert.AreEqual("abc", RubyControlFieldExpression.GetVariableName("@abc"));
 }