/**
* Call nextEvaluation() the expected number of times, and check that it returns true (or throws
* an exception).
*/
@Action
public void nextEval() {
assert data_ != null;
debug("nextEval trying nextEval() " + data_.successes + " times.");
if (data_.successes > 1) {
// just check that true is returned the expected number of times.
for (int i = data_.successes; i > 0; i--) Assert.assertTrue(pred_.nextEvaluation());
} else if (data_.successes == 1) {
Assert.assertTrue("nextEvaluation should be true", pred_.nextEvaluation());
// check that the correct results were returned.
Envir newenv = pred_.getEnvir();
debug("nextEval returns newenv=" + newenv);
for (int i = 0; i < names_.length; i++) {
Assert.assertTrue(names_[i] + " undefined.", newenv.isDefined(names_[i]));
Assert.assertEquals(
names_[i] + " has incorrect value.", data_.args[i], newenv.lookup(names_[i]));
}
} else if (data_.successes == Eval.UNDEF) {
try {
pred_.nextEvaluation();
Assert.fail("Should have thrown UndefException: " + pred_);
} catch (UndefException ex) {
// Good!
}
}
// else data_.successes == 0, so we do nothing.
data_ = null;
state_ = State.Finished;
}
// @requires env_ != null;
public void startEval(/*@non_null@*/ Eval data) {
// Note: we use the original env here, as given to chooseMode.
for (int i = 0; i < names_.length; i++) {
if (env_.isDefined(names_[i])) {
Expr value = data.args[i];
env_.setValue(names_[i], value);
}
}
debug("startEval with env=" + env_);
pred_.startEvaluation();
data_ = data;
state_ = State.Started;
}
public String getState() {
StringBuffer result = new StringBuffer();
result.append(state_.toString());
if (env_ != null) {
// add the mode to the end of the state.
for (int i = 0; i < names_.length; i++) {
if (!env_.isDefined(names_[i])) result.append('O');
else result.append('I'); // an input
}
}
return result.toString();
}
/**
* Checks that we are in State.GotMode and that the current mode is compatible with data.modes.
*/
protected boolean startEvalGuard(Eval data) {
boolean result = state_ == State.GotMode;
for (int i = 0; result && i < names_.length; i++) {
if (env_.isDefined(names_[i])) {
// names_[i] is an input, so 'I' or '?' is allowed.
if (data.modes.charAt(i) == 'O') result = false;
} else {
// names_[i] is an output, so 'O' or '?' is allowed.
if (data.modes.charAt(i) == 'I') result = false;
}
}
return result;
}
// @requires inout.length == 3;
public void chooseMode(String inout) {
assert inout.length() == 3;
boolean isInput[] = new boolean[names_.length];
env_ = new Envir();
// Is names_[0] an input?
isInput[0] = inout.charAt(0) == 'I';
// Are names_[1..length-2] inputs?
for (int i = 1; i <= names_.length - 2; i++) isInput[i] = inout.charAt(1) == 'I';
// Is names_[length-1] an input?
isInput[names_.length - 1] = inout.charAt(2) == 'I';
// Now add the inputs into env.
for (int i = 0; i < names_.length; i++) if (isInput[i]) env_ = env_.plus(names_[i], null);
boolean shouldWork = validModes_.contains(inout);
mode_ = pred_.chooseMode(env_);
debug("chooseMode(" + env_ + ") --> " + mode_);
if (shouldWork) Assert.assertNotNull("Valid mode expected, but got null", mode_);
else Assert.assertNull("Null mode expected, but got " + mode_, mode_);
if (mode_ == null) {
state_ = State.NoMode;
env_ = null;
} else {
// now check that mode is correct.
for (int i = 0; i < names_.length; i++) {
Assert.assertEquals("name[" + i + "] = " + names_[i], isInput[i], mode_.isInput(names_[i]));
}
pred_.setMode(mode_);
// check that all names are defined in the output environment.
Envir newenv = mode_.getEnvir();
for (int i = 0; i < names_.length; i++)
Assert.assertTrue(names_[i] + " should be defined", newenv.isDefined(names_[i]));
state_ = State.GotMode;
// NOTE that env_ is left as the input environment.
}
}
