@Test
public void testReductionLimit() throws CompileException {
PrologEnvironment env = envFactory.create(machine);
setUpEnvironment(env);
String script = "loopy :- b(5).\n" + "b(N) :- N > 0, !, S = N - 1, b(S).\n" + "b(_) :- true.\n";
SymbolTerm nameTerm = SymbolTerm.create("testReductionLimit");
JavaObjectTerm inTerm =
new JavaObjectTerm(new PushbackReader(new StringReader(script), Prolog.PUSHBACK_SIZE));
if (!env.execute(Prolog.BUILTIN, "consult_stream", nameTerm, inTerm)) {
throw new CompileException("Cannot consult " + nameTerm);
}
exception.expect(ReductionLimitException.class);
exception.expectMessage("exceeded reduction limit of 1300");
env.once(
Prolog.BUILTIN,
"call",
new StructureTerm(":", SymbolTerm.create("user"), SymbolTerm.create("loopy")));
}
@Override
public Operation exec(Prolog engine) throws PrologException {
engine.setB0();
Term a1 = arg1.dereference();
PatchSetInfo psInfo = StoredValues.PATCH_SET_INFO.get(engine);
SymbolTerm msg = SymbolTerm.create(psInfo.getMessage());
if (!a1.unify(msg, engine.trail)) {
return engine.fail();
}
return cont;
}
protected Operation exec(Prolog engine, UserIdentity userId) throws PrologException {
engine.setB0();
Term a1 = arg1.dereference();
Term a2 = arg2.dereference();
Term a3 = arg3.dereference();
Term idTerm;
Term nameTerm = Prolog.Nil;
Term emailTerm = Prolog.Nil;
Account.Id id = userId.getAccount();
if (id == null) {
idTerm = anonymous;
} else {
idTerm = new IntegerTerm(id.get());
}
String name = userId.getName();
if (name != null && !name.equals("")) {
nameTerm = SymbolTerm.create(name);
}
String email = userId.getEmail();
if (email != null && !email.equals("")) {
emailTerm = SymbolTerm.create(email);
}
if (!a1.unify(new StructureTerm(user, idTerm), engine.trail)) {
return engine.fail();
}
if (!a2.unify(nameTerm, engine.trail)) {
return engine.fail();
}
if (!a3.unify(emailTerm, engine.trail)) {
return engine.fail();
}
return cont;
}