protected List<List<Statement>> buildContext(
InputContext inputContext, List<Statement> stmts, int targetIndex) {
VarCartesianProduct varCartesianProduct = new VarCartesianProduct();
Statement statement = stmts.get(targetIndex);
for (CtVariableReference var : statement.getInputContext().getVar()) {
varCartesianProduct.addReplaceVar(var, valueCreator.createNull(var.getType()));
List<CtVariableReference> candidates = inputContext.allCandidate(var.getType(), true, false);
if (!candidates.isEmpty()) {
varCartesianProduct.addReplaceVar(
var, candidates.get(AmplificationHelper.getRandom().nextInt(candidates.size())));
}
Statement cfLocalVar = getLocalVar(var.getType(), inputContext);
if (cfLocalVar != null) {
varCartesianProduct.addReplaceVar(var, cfLocalVar);
}
CtLocalVariable localVariable =
createLocalVarFromMethodLiterals(currentMethod, var.getType());
if (localVariable != null) {
varCartesianProduct.addReplaceVar(var, localVariable);
}
CtLocalVariable randomVar = valueCreator.createRandomLocalVar(var.getType());
if (randomVar != null) {
varCartesianProduct.addReplaceVar(var, randomVar);
}
}
return varCartesianProduct.apply(stmts, targetIndex);
}
protected List<CtStatement> getAssertStatement(CtMethod method) {
List<CtStatement> statements = Query.getElements(method, new TypeFilter(CtStatement.class));
return statements
.stream()
.filter(stmt -> stmt.getParent() instanceof CtBlock)
.filter(stmt -> AmplificationChecker.isAssert(stmt))
.collect(Collectors.toList());
}
protected List<InputContext> getInputContexts(CtMethod method) {
List<InputContext> inputContexts = new ArrayList<>();
List<CtStatement> statements = getAssertStatement(method);
for (CtStatement stmt : statements) {
Set<CtVariableReference> varRefs = new HashSet<>();
for (CtLocalVariable var : getLocalVarInScope(stmt)) {
varRefs.add(method.getFactory().Code().createLocalVariableReference(var));
}
inputContexts.add(new InputContext(varRefs));
}
return inputContexts;
}
protected CtLocalVariable createLocalVarFromMethodLiterals(
CtMethod method, CtTypeReference type) {
List<CtLiteral> literals =
getLiterals(method)
.stream()
.filter(lit -> lit.getType() != null)
.filter(lit -> lit.getType().equals(type))
.collect(Collectors.toList());
if (literals.isEmpty()) {
return null;
}
CtLiteral lit = literals.get(AmplificationHelper.getRandom().nextInt(literals.size()));
return type.getFactory().Code().createLocalVariable(type, "vc_" + count++, lit);
}
protected List<List<Statement>> buildStatements(InputContext inputContext) {
return coverageBycodeFragments
.keySet()
.stream()
.map(
cf -> {
List<Statement> list = new ArrayList<>(2);
list.add(cf.clone());
return list;
})
.flatMap(
list -> {
InputContext cloneInputContext = inputContext.clone();
return buildContext(cloneInputContext, list, list.size() - 1).stream();
})
.collect(Collectors.toList());
}
public void reset(Coverage coverage, CtType testClass) {
AmplificationHelper.reset();
literalsByMethod = new HashMap<>();
Set<CtType> codeFragmentsProvide = AmplificationHelper.computeClassProvider(testClass);
List<Statement> codeFragmentsByClass =
codeFragmentsProvide
.stream()
.flatMap(
cl -> {
List<CtStatement> list = Query.getElements(cl, new TypeFilter(CtStatement.class));
return list.stream();
})
.filter(
stmt -> {
try {
return stmt.getParent() != null;
} catch (Exception e) {
return false;
}
})
.filter(stmt -> stmt.getParent() instanceof CtBlock)
.filter(stmt -> !stmt.toString().startsWith("super"))
.filter(stmt -> !stmt.toString().startsWith("this("))
.map(stmt -> new Statement(stmt))
.collect(Collectors.toList());
if (findClassUnderTest(testClass) != null) {
coverageBycodeFragments = buildCodeFragmentFor(findClassUnderTest(testClass), coverage);
} else {
coverageBycodeFragments = new HashMap<>();
}
Set<Integer> ids = new HashSet<>();
localVars =
codeFragmentsByClass
.stream()
.filter(cf -> isValidCodeFragment(cf))
.filter(cf -> ids.add(cf.id()))
.collect(Collectors.toList());
}
protected CtMethod apply(CtMethod method, List<Statement> statements, int index) {
CtMethod cloned_method = AmplificationHelper.cloneMethodTest(method, "_cf", 1000);
CtStatement stmt = getAssertStatement(cloned_method).get(index);
statements
.stream()
.forEach(
c -> {
stmt.insertBefore((CtStatement) c.getCtCodeFragment());
c.getCtCodeFragment().setParent(stmt.getParent());
});
return cloned_method;
}
protected Statement getLocalVar(CtTypeReference type, InputContext inputContext) {
List<Statement> list =
localVars
.stream()
.filter(var -> var.getCtCodeFragment() != null)
.filter(var -> type.equals(((CtLocalVariable) var.getCtCodeFragment()).getType()))
.filter(
var ->
inputContext.getVariableOrFieldNamed(
((CtLocalVariable) var.getCtCodeFragment()).getSimpleName())
== null)
.collect(Collectors.toList());
if (list.isEmpty()) {
return null;
} else {
boolean localVarFind;
while (!list.isEmpty()) {
Statement localVar = list.remove(AmplificationHelper.getRandom().nextInt(list.size()));
localVarFind = true;
for (CtVariableReference var : localVar.getInputContext().getVar()) {
CtVariableReference<?> candidate = inputContext.candidate(var.getType(), true);
if (candidate == null) {
localVarFind = false;
break;
}
}
if (localVarFind) {
Statement cloneLocalVar = localVar.clone();
for (CtVariableReference var : localVar.getInputContext().getVar()) {
try {
CtVariableReference variable =
cloneLocalVar.getInputContext().getVariableOrFieldNamed(var.getSimpleName());
cloneLocalVar
.getInputContext()
.getVariableOrFieldNamed(var.getSimpleName())
.replace(variable);
} catch (Exception e) {
continue;
}
return cloneLocalVar;
}
}
}
return null;
}
}
@Override
public List<CtMethod> apply(CtMethod method) {
currentMethod = method;
List<CtMethod> newMethods = new ArrayList<>();
if (!coverageBycodeFragments.isEmpty()) {
List<InputContext> inputContexts = getInputContexts(method);
if (!inputContexts.isEmpty()) {
int index = inputContexts.size() - 1;
List<List<Statement>> statements = buildStatements(inputContexts.get(index));
for (List<Statement> list : statements) {
try {
newMethods.add(apply(method, list, index));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}
return AmplificationHelper.updateAmpTestToParent(newMethods, method);
}
protected List<CtLocalVariable> getLocalVarInScope(CtStatement stmt) {
List<CtLocalVariable> vars = new ArrayList<>();
try {
CtBlock parentBlock = stmt.getParent(CtBlock.class);
if (parentBlock != null) {
boolean beforeCurrentStmt = true;
int i = 0;
List<CtStatement> stmts = parentBlock.getStatements();
while (beforeCurrentStmt && i < stmts.size()) {
CtStatement currentStatement = stmts.get(i);
i++;
beforeCurrentStmt = beforeCurrentStmt && currentStatement != stmt;
if (currentStatement instanceof CtLocalVariable) {
vars.add((CtLocalVariable) currentStatement);
}
}
vars.addAll(getLocalVarInScope(parentBlock));
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return vars;
}