VariableString filter = new VariableString("email=${email}");
smi.getInputChain().addMapper(new StringVariable("filter", filter));
smi.setTypeHelper(new TypeHelper());
src.add("search1", smi);
/* start source */
src.start(env);
/* create mapper */
SearchMapper sm = (SearchMapper) src.create("search1", new HashMap());
/* ensure mapper is new */
assertNotSame(sm, smi);
/* close */