org.evosuite.testcase.statements.MethodStatement Maven / Gradle / Ivy
/**
* Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see
* Constructor for MethodStatement.
*
*
* @param tc
* a {@link org.evosuite.testcase.TestCase} object.
* @param method
* a {@link java.lang.reflect.Method} object.
* @param callee
* a {@link org.evosuite.testcase.variable.VariableReference} object.
* @param parameters
* a {@link java.util.List} object.
*/
public MethodStatement(TestCase tc, GenericMethod method, VariableReference callee,
List parameters) throws IllegalArgumentException {
super(tc, method.getReturnType(), parameters,
method.getMethod().getAnnotations(),method.getMethod().getParameterAnnotations());
init(method, callee);
}
public MethodStatement(TestCase tc, GenericMethod method, VariableReference callee,
List parameters, VariableReference retVal)
throws IllegalArgumentException {
this(tc, method, callee, parameters);
this.retval = retVal;
}
/**
* This constructor allows you to use an already existing VariableReference
* as retvar. This should only be done, iff an old statement is replaced
* with this statement. And already existing objects should in the future
* reference this object.
*
* @param tc
* a {@link org.evosuite.testcase.TestCase} object.
* @param method
* a {@link java.lang.reflect.Method} object.
* @param callee
* a {@link org.evosuite.testcase.variable.VariableReference} object.
* @param retvar
* a {@link org.evosuite.testcase.variable.VariableReference} object.
* @param parameters
* a {@link java.util.List} object.
*/
public MethodStatement(TestCase tc, GenericMethod method, VariableReference callee,
VariableReference retvar, List parameters) {
super(tc, retvar, parameters,
method.getMethod().getAnnotations(),method.getMethod().getParameterAnnotations());
if (retvar.getStPosition() >= tc.size()) {
//as an old statement should be replaced by this statement
throw new IllegalArgumentException("Cannot replace in position "
+ retvar.getStPosition() + " when the test case has only "
+ tc.size() + " elements");
}
init(method, callee);
}
private void init(GenericMethod method, VariableReference callee) throws IllegalArgumentException {
if (callee == null && !method.isStatic()) {
throw new IllegalArgumentException(
"A null callee cannot call a non-static method: " +
method.getDeclaringClass().getCanonicalName() +
"." + method.getName());
}
if (parameters == null) {
throw new IllegalArgumentException("Parameter list cannot be null for method " +
method.getDeclaringClass().getCanonicalName() +
"." + method.getName());
}
for (VariableReference var : parameters) {
if (var == null) {
//recall that 'null' would be mapped to a NullReference
throw new IllegalArgumentException(
"Parameter list cannot have null parameters (this is different from a NullReference)");
}
}
if (method.getParameterTypes().length != parameters.size()) {
throw new IllegalArgumentException(
"Parameters list mismatch from the types declared in the method: "
+ method.getParameterTypes().length + " != "
+ parameters.size());
}
this.method = method;
if (isStatic())
this.callee = null;
else
this.callee = callee;
}
/**
*
* Getter for the field method.
*
*
* @return a {@link java.lang.reflect.Method} object.
*/
public GenericMethod getMethod() {
return method;
}
/**
*
* Setter for the field method.
*
*
* @param method
* a {@link java.lang.reflect.Method} object.
*/
public void setMethod(GenericMethod method) {
this.method = method;
}
/**
*
* Getter for the field callee.
*
*
* @return a {@link org.evosuite.testcase.variable.VariableReference} object.
*/
public VariableReference getCallee() {
return callee;
}
/**
*
* Setter for the field callee.
*
*
* @param callee
* a {@link org.evosuite.testcase.variable.VariableReference} object.
*/
public void setCallee(VariableReference callee) {
if (!isStatic())
this.callee = callee;
}
/**
*
* isStatic
*
*
* @return a boolean.
*/
public boolean isStatic() {
return method.isStatic();
}
private boolean isInstanceMethod() {
return !method.isStatic();
}
/** {@inheritDoc} */
@Override
public Throwable execute(final Scope scope, PrintStream out)
throws InvocationTargetException, IllegalArgumentException,
IllegalAccessException, InstantiationException {
logger.trace("Executing method " + method.getName());
final Object[] inputs = new Object[parameters.size()];
Throwable exceptionThrown = null;
try {
return super.exceptionHandler(new Executer() {
@Override
public void execute() throws InvocationTargetException,
IllegalArgumentException, IllegalAccessException,
InstantiationException, CodeUnderTestException {
Object callee_object;
try {
java.lang.reflect.Type[] parameterTypes = method.getParameterTypes();
for (int i = 0; i < parameters.size(); i++) {
VariableReference parameterVar = parameters.get(i);
inputs[i] = parameterVar.getObject(scope);
if(inputs[i] == null && method.getMethod().getParameterTypes()[i].isPrimitive()) {
throw new CodeUnderTestException(new NullPointerException());
}
if (inputs[i] != null && !TypeUtils.isAssignable(inputs[i].getClass(), parameterTypes[i])) {
// TODO: This used to be a check of the declared type, but the problem is that
// Generic types are not updated during execution, so this may fail:
//!parameterVar.isAssignableTo(parameterTypes[i])) {
throw new CodeUnderTestException(
new UncompilableCodeException("Cannot assign "+parameterVar.getVariableClass().getName() +" to "+parameterTypes[i]));
}
}
callee_object = method.isStatic() ? null
: callee.getObject(scope);
if (!method.isStatic() && callee_object == null) {
throw new CodeUnderTestException(new NullPointerException());
}
} catch (CodeUnderTestException e) {
throw e;
// throw CodeUnderTestException.throwException(e.getCause());
} catch (Throwable e) {
e.printStackTrace();
throw new EvosuiteError(e);
}
Object ret = method.getMethod().invoke(callee_object, inputs);
// Try exact return type
/*
* TODO: Sometimes we do want to cast an Object to String etc...
*/
if (method.getReturnType() instanceof Class) {
Class returnClass = (Class)method.getReturnType();
if (!returnClass.isPrimitive()
&& ret != null
&& !returnClass.isAssignableFrom(ret.getClass())) {
throw new CodeUnderTestException(new ClassCastException(
"Cannot assign " + method.getReturnType()
+ " to variable of type " + retval.getType()));
}
}
try {
retval.setObject(scope, ret);
} catch (CodeUnderTestException e) {
throw e;
// throw CodeUnderTestException.throwException(e);
} catch (Throwable e) {
throw new EvosuiteError(e);
}
}
@Override
public Set> throwableExceptions() {
Set> t = new LinkedHashSet>();
t.add(InvocationTargetException.class);
return t;
}
});
} catch (InvocationTargetException e) {
exceptionThrown = e.getCause();
logger.debug("Exception thrown in method {}: {}", method.getName(),
exceptionThrown);
}
return exceptionThrown;
}
/** {@inheritDoc} */
@Override
public boolean isDeclaredException(Throwable t) {
if(t == null)
return false;
for (Class declaredException : method.getMethod().getExceptionTypes()) {
if (declaredException.isAssignableFrom(t.getClass()))
return true;
}
return false;
}
/** {@inheritDoc} */
@Override
public Statement copy(TestCase newTestCase, int offset) {
ArrayList newParams = new ArrayList();
for (VariableReference r : parameters) {
newParams.add(r.copy(newTestCase, offset));
}
MethodStatement m;
if (isStatic()) {
// FIXXME: If callee is an array index, this will return an invalid
// copy of the cloned variable!
m = new MethodStatement(newTestCase, method.copy(), null, newParams);
} else {
VariableReference newCallee = callee.copy(newTestCase, offset);
m = new MethodStatement(newTestCase, method.copy(), newCallee, newParams);
}
if (retval instanceof ArrayReference
&& !(m.getReturnValue() instanceof ArrayReference)) {
// logger.info("Copying array retval: " + retval.getGenericClass());
// assert (retval.getGenericClass() != null);
// assert (retval.getGenericClass().isArray()) : method.toString();
ArrayReference newRetVal = new ArrayReference(newTestCase,
retval.getGenericClass(), ((ArrayReference) retval).getArrayLength());
m.setRetval(newRetVal);
}
m.getReturnValue().setType(retval.getType()); // Actual type may have changed, e.g. subtype
// m.assertions = copyAssertions(newTestCase, offset);
return m;
}
/** {@inheritDoc} */
@Override
public Set getVariableReferences() {
Set references = super.getVariableReferences();
if (isInstanceMethod()) {
references.add(callee);
if (callee.getAdditionalVariableReference() != null)
references.add(callee.getAdditionalVariableReference());
}
return references;
}
/* (non-Javadoc)
* @see org.evosuite.testcase.StatementInterface#replace(org.evosuite.testcase.VariableReference, org.evosuite.testcase.VariableReference)
*/
/** {@inheritDoc} */
@Override
public void replace(VariableReference var1, VariableReference var2) {
super.replace(var1, var2);
if (isInstanceMethod()) {
if (callee.equals(var1))
callee = var2;
else
callee.replaceAdditionalVariableReference(var1, var2);
}
}
/* (non-Javadoc)
* @see org.evosuite.testcase.StatementInterface#getNumParameters()
*/
@Override
public int getNumParameters() {
return parameters.size() + (isStatic() ? 0 : 1);
}
/** {@inheritDoc} */
@Override
public String toString() {
return method.getName() + Type.getMethodDescriptor(method.getMethod());
}
/** {@inheritDoc} */
@Override
public boolean equals(Object s) {
if (this == s)
return true;
if (s == null)
return false;
if (getClass() != s.getClass())
return false;
MethodStatement ms = (MethodStatement) s;
if (ms.parameters.size() != parameters.size())
return false;
if (!this.method.equals(ms.method))
return false;
for (int i = 0; i < parameters.size(); i++) {
if (!parameters.get(i).equals(ms.parameters.get(i)))
return false;
}
if (!retval.equals(ms.retval))
return false;
if ((callee == null && ms.callee != null)
|| (callee != null && ms.callee == null)) {
return false;
} else {
if (callee == null)
return true;
else
return (callee.equals(ms.callee));
}
}
/** {@inheritDoc} */
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((callee == null) ? 0 : callee.hashCode());
result = prime * result + ((method == null) ? 0 : method.hashCode());
result = prime * result + ((parameters == null) ? 0 : parameters.hashCode());
return result;
}
/*
* (non-Javadoc)
*
* @see org.evosuite.testcase.Statement#getDeclaredExceptions()
*/
/** {@inheritDoc} */
@Override
public Set> getDeclaredExceptions() {
Set> ex = super.getDeclaredExceptions();
for (Class t : method.getMethod().getExceptionTypes())
ex.add(t);
return ex;
}
/*
* (non-Javadoc)
*
* @see
* org.evosuite.testcase.Statement#getUniqueVariableReferences()
*/
/** {@inheritDoc} */
@Override
public List getUniqueVariableReferences() {
List references = super.getUniqueVariableReferences();
if (isInstanceMethod()) {
references.add(callee);
if (callee instanceof ArrayIndex)
references.add(((ArrayIndex) callee).getArray());
}
return references;
}
@Override
public boolean isAccessible() {
if(!method.isAccessible())
return false;
return super.isAccessible();
}
/* (non-Javadoc)
* @see org.evosuite.testcase.StatementInterface#isValid()
*/
/** {@inheritDoc} */
@Override
public boolean isValid() {
assert (super.isValid());
for (VariableReference v : parameters) {
v.getStPosition();
}
if (!isStatic()) {
callee.getStPosition();
}
return true;
}
/** {@inheritDoc} */
@Override
public boolean same(Statement s) {
if (this == s)
return true;
if (s == null)
return false;
if (getClass() != s.getClass())
return false;
MethodStatement ms = (MethodStatement) s;
if (ms.parameters.size() != parameters.size())
return false;
for (int i = 0; i < parameters.size(); i++) {
if (!parameters.get(i).same(ms.parameters.get(i)))
return false;
}
if (!this.method.equals(ms.method))
return false;
if (!retval.same(ms.retval))
return false;
if ((callee == null && ms.callee != null)
|| (callee != null && ms.callee == null)) {
return false;
} else {
if (callee == null)
return true;
else
return (callee.same(ms.callee));
}
}
/**
* Go through parameters of method call and apply local search
*
* @param test
* @param factory
*/
@Override
public boolean mutate(TestCase test, TestFactory factory) {
if (Randomness.nextDouble() >= Properties.P_CHANGE_PARAMETER)
return false;
Constraints constraint = method.getMethod().getAnnotation(Constraints.class);
if(constraint!=null && constraint.notMutable()){
return false;
}
List parameters = getParameterReferences();
boolean changed = false;
int max = parameters.size();
if (!isStatic()) {
max++;
}
if(max == 0)
return false; // Static method with no parameters...
double pParam = 1.0/max;
if(!isStatic() && Randomness.nextDouble() < pParam) {
// replace callee
VariableReference callee = getCallee();
List objects = test.getObjects(callee.getType(),
getPosition());
objects.remove(callee);
objects = objects.stream().filter(var -> ! (test.getStatement(var.getStPosition()) instanceof FunctionalMockStatement))
.collect(Collectors.toList());
if (!objects.isEmpty()) {
VariableReference replacement = Randomness.choice(objects);
setCallee(replacement);
changed = true;
}
}
for(int numParameter = 0; numParameter < parameters.size(); numParameter++) {
if(Randomness.nextDouble() < pParam) {
if(mutateParameter(test, numParameter))
changed = true;
}
}
return changed;
}
/** {@inheritDoc} */
@Override
public GenericMethod getAccessibleObject() {
return method;
}
/** {@inheritDoc} */
@Override
public boolean isAssignmentStatement() {
return false;
}
/* (non-Javadoc)
* @see org.evosuite.testcase.StatementInterface#changeClassLoader(java.lang.ClassLoader)
*/
/** {@inheritDoc} */
@Override
public void changeClassLoader(ClassLoader loader) {
method.changeClassLoader(loader);
super.changeClassLoader(loader);
}
@Override
public String getDescriptor() {
return method.getDescriptor();
}
@Override
public String getDeclaringClassName() {
return method.getDeclaringClass().getCanonicalName();
}
@Override
public String getMethodName() {
return method.getName();
}
}