org.powermock.modules.testng.internal.PowerMockClassloaderObjectFactory Maven / Gradle / Ivy
/*
* Copyright 2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.powermock.modules.testng.internal;
import javassist.util.proxy.ProxyFactory;
import org.powermock.core.MockRepository;
import org.powermock.core.classloader.MockClassLoader;
import org.powermock.core.transformers.MockTransformer;
import org.powermock.core.transformers.impl.MainMockTransformer;
import org.powermock.modules.testng.PowerMockTestCase;
import org.powermock.reflect.Whitebox;
import org.powermock.reflect.proxyframework.RegisterProxyFramework;
import org.powermock.tests.utils.IgnorePackagesExtractor;
import org.powermock.tests.utils.TestClassesExtractor;
import org.powermock.tests.utils.impl.MockPolicyInitializerImpl;
import org.powermock.tests.utils.impl.PowerMockIgnorePackagesExtractorImpl;
import org.powermock.tests.utils.impl.PrepareForTestExtractorImpl;
import org.testng.IObjectFactory;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.List;
@SuppressWarnings("serial")
public class PowerMockClassloaderObjectFactory implements IObjectFactory {
private final MockClassLoader mockLoader;
private final TestClassesExtractor testClassesExtractor;
private final IgnorePackagesExtractor ignorePackagesExtractor;
private final ExpectedExceptionsExtractor expectedExceptionsExtractor;
public PowerMockClassloaderObjectFactory() {
List mockTransformerChain = new ArrayList();
final MainMockTransformer mainMockTransformer = new MainMockTransformer();
mockTransformerChain.add(mainMockTransformer);
String[] classesToLoadByMockClassloader = new String[0];
String[] packagesToIgnore = new String[0];
mockLoader = new MockClassLoader(classesToLoadByMockClassloader, packagesToIgnore);
mockLoader.setMockTransformerChain(mockTransformerChain);
testClassesExtractor = new PrepareForTestExtractorImpl();
ignorePackagesExtractor = new PowerMockIgnorePackagesExtractorImpl();
expectedExceptionsExtractor = new PowerMockExpectedExceptionsExtractorImpl();
}
public Object newInstance(@SuppressWarnings("rawtypes") Constructor constructor, Object... params) {
/*
* For extra safety clear the MockitoRepository on each new
* instantiation of the object factory. This is good in cases where a
* previous test has used e.g. PowerMock#createMock(..) to create a mock
* without using this factory. That means that there's some state left in
* the MockRepository that hasn't been cleared. Currently clearing the
* MockRepository from any classloader will clear the previous state but
* it's not certain that this is always the case.
*/
MockRepository.clear();
Class testClass = constructor.getDeclaringClass();
mockLoader.addIgnorePackage(ignorePackagesExtractor.getPackagesToIgnore(testClass));
mockLoader.addIgnorePackage(expectedExceptionsExtractor.getPackagesToIgnore(testClass));
mockLoader.addClassesToModify(testClassesExtractor.getTestClasses(testClass));
try {
registerProxyframework(mockLoader);
new MockPolicyInitializerImpl(testClass).initialize(mockLoader);
final Class testClassLoadedByMockedClassLoader = createTestClass(testClass);
Constructor con = testClassLoadedByMockedClassLoader.getConstructor(constructor.getParameterTypes());
final Object testInstance = con.newInstance(params);
if (!extendsPowerMockTestCase(testClass)) {
setInvocationHandler(testInstance);
}
return testInstance;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void setInvocationHandler(Object testInstance) throws Exception {
Class powerMockTestNGMethodHandlerClass = Class.forName(PowerMockTestNGMethodHandler.class.getName(), false, mockLoader);
Object powerMockTestNGMethodHandlerInstance = powerMockTestNGMethodHandlerClass.getConstructor(Class.class).newInstance(
testInstance.getClass());
Whitebox.invokeMethod(testInstance, "setHandler", powerMockTestNGMethodHandlerInstance);
}
/**
* We proxy the test class in order to be able to clear state after each
* test method invocation. It would be much better to be able to register a
* testng listener programmtically but I cannot find a way to do so.
*/
private Class createTestClass(Class actualTestClass) throws Exception {
final Class testClassLoadedByMockedClassLoader = Class.forName(actualTestClass.getName(), false, mockLoader);
if (extendsPowerMockTestCase(actualTestClass)) {
return testClassLoadedByMockedClassLoader;
} else {
Class proxyFactoryClass = Class.forName(ProxyFactory.class.getName(), false, mockLoader);
final Class testNGMethodFilterByMockedClassLoader = Class.forName(TestNGMethodFilter.class.getName(), false, mockLoader);
Object f = proxyFactoryClass.newInstance();
Object filter = testNGMethodFilterByMockedClassLoader.newInstance();
Whitebox.invokeMethod(f, "setFilter", filter);
Whitebox.invokeMethod(f, "setSuperclass", testClassLoadedByMockedClassLoader);
Class c = Whitebox.invokeMethod(f, "createClass");
return c;
}
}
private boolean extendsPowerMockTestCase(Class actualTestClass) {
return PowerMockTestCase.class.isAssignableFrom(actualTestClass);
}
private void registerProxyframework(ClassLoader classLoader) {
Class proxyFrameworkClass = null;
try {
proxyFrameworkClass = Class.forName("org.powermock.api.extension.proxyframework.ProxyFrameworkImpl", false, classLoader);
} catch (ClassNotFoundException e) {
throw new IllegalStateException(
"Extension API internal error: org.powermock.api.extension.proxyframework.ProxyFrameworkImpl could not be located in classpath.");
}
Class proxyFrameworkRegistrar = null;
try {
proxyFrameworkRegistrar = Class.forName(RegisterProxyFramework.class.getName(), false, classLoader);
} catch (ClassNotFoundException e) {
// Should never happen
throw new RuntimeException(e);
}
try {
Whitebox.invokeMethod(proxyFrameworkRegistrar, "registerProxyFramework", Whitebox.newInstance(proxyFrameworkClass));
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}