@Override
public void visit(final BlockStmt n, final A arg) {
visitComment(n.getComment(), arg);
if (n.getStmts() != null) {
for (final Statement s : n.getStmts()) {
s.accept(this, arg);
}
}
}
@Override
public Boolean visit(final BlockStmt n1, final Node arg) {
final BlockStmt n2 = (BlockStmt) arg;
if (!nodesEquals(n1.getStmts(), n2.getStmts())) {
return Boolean.FALSE;
}
return Boolean.TRUE;
}
// This method does the actual body generation: the body is forked for every children and only
// added to the bodies list when the leaf is reached
private static void generateTestBodies(
RoundTripPathTreeNode node,
BlockStmt body,
List<BlockStmt> bodies,
Map<String, Integer> usedVarNames) {
final List<Statement> statements = body.getStmts();
final Transition transition = node.getTransition();
// This comment will be added to the first statement in this event check
final LineComment comment = new LineComment(" " + node.getSignature());
boolean commentAdded = false;
// Generate the condition reacher first if needed
if (!transition.getCondition().isEmpty()) {
final Statement conditionReacher = generateConditionReacher(transition.getCondition());
conditionReacher.setComment(comment);
commentAdded = true;
statements.add(conditionReacher);
}
// Next place the pre statements of the action checks
final List<ActionCheck> checks = generateActionChecks(transition.getAction(), usedVarNames);
for (ActionCheck check : checks) {
final List<Statement> pre = check.getPre();
// Add the comment to the first pre statement, if any exist
if (!commentAdded && !pre.isEmpty()) {
pre.get(0).setComment(comment);
commentAdded = true;
}
statements.addAll(pre);
}
// Now we add the actual event call
final Statement eventStatement = eventAsStatement(transition.getEvent());
if (!commentAdded) {
// If this is the first statement, add the comment now
eventStatement.setComment(comment);
}
statements.add(eventStatement);
// Next we check that the event caused the right state
statements.add(generateStateCheck(transition.getTo().getName()));
// Finally we check the action results using the post statements
for (ActionCheck check : checks) {
statements.add(check.getPost());
}
// Generate the rest of the test case using the children
final List<RoundTripPathTreeNode> children = node.getChildren();
if (children.isEmpty()) {
// Reached leaf, test case is complete
bodies.add(body);
} else {
// Generate the test statements for the next state transitions
for (RoundTripPathTreeNode child : children) {
// Clone the body and used variable names to ensure each test case has its own
generateTestBodies(
child, (BlockStmt) body.clone(), bodies, new HashMap<String, Integer>(usedVarNames));
}
}
}
// This parses the action as a list of statements and replaces variables by equivalent getters
// called on a "machine" variable
private static List<Statement> actionAsStatements(String action) {
if (action.isEmpty()) {
return Collections.emptyList();
}
try {
final BlockStmt block = JavaParser.parseBlock('{' + action + '}');
// Replace fields by getters
block.accept(VariableToGetter.INSTANCE, null);
return block.getStmts();
} catch (ParseException exception) {
throw new RuntimeException(exception);
}
}