propertySensor2=new StringConstant(s2.toString());
try {
Vector v = new Vector();
v.add(propertySensor1);
Expression es1 = new ToUpper(v,true);
v.clear();
v.add(propertySensor2);
Expression es2 = new ToUpper(v,true);
String x=(String)es1.evaluate();
assertTrue(x.equals(s3));
x=(String)es2.evaluate();
assertTrue(x.equals(s3));
} catch (SPLException e) {
fail("Received evaluation exception " + e.getMessage());