| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * 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 com.android.dx.mockito.inline; |
| |
| import android.os.Build; |
| |
| import org.mockito.Mockito; |
| import org.mockito.creation.instance.Instantiator; |
| import org.mockito.exceptions.base.MockitoException; |
| import org.mockito.invocation.MockHandler; |
| import org.mockito.mock.MockCreationSettings; |
| import org.mockito.plugins.InstantiatorProvider2; |
| import org.mockito.plugins.MockMaker; |
| |
| import java.io.IOException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| |
| /** |
| * Creates mock markers and adds stubbing hooks to static method |
| * |
| * <p>This is done by transforming the byte code of the classes to add method entry hooks. |
| */ |
| public final class InlineStaticMockMaker implements MockMaker { |
| /** |
| * {@link StaticJvmtiAgent} set up during one time init |
| */ |
| private static final StaticJvmtiAgent AGENT; |
| |
| /** |
| * Error during one time init or {@code null} if init was successful |
| */ |
| private static final Throwable INITIALIZATION_ERROR; |
| public static ThreadLocal<Class> mockingInProgressClass = new ThreadLocal<>(); |
| public static ThreadLocal<BiConsumer<Class<?>, Method>> onMethodCallDuringStubbing |
| = new ThreadLocal<>(); |
| public static ThreadLocal<BiConsumer<Class<?>, Method>> onMethodCallDuringVerification |
| = new ThreadLocal<>(); |
| |
| /* |
| * One time setup to allow the system to mocking via this mock maker. |
| */ |
| static { |
| StaticJvmtiAgent agent; |
| Throwable initializationError = null; |
| |
| try { |
| try { |
| agent = new StaticJvmtiAgent(); |
| } catch (IOException ioe) { |
| throw new IllegalStateException("Mockito could not self-attach a jvmti agent to " + |
| "the current VM. This feature is required for inline mocking.\nThis error" + |
| " occured due to an I/O error during the creation of this agent: " + ioe |
| + "\n\nPotentially, the current VM does not support the jvmti API " + |
| "correctly", ioe); |
| } |
| |
| // Blacklisted APIs were introduced in Android P: |
| // |
| // https://android-developers.googleblog.com/2018/02/ |
| // improving-stability-by-reducing-usage.html |
| // |
| // This feature prevents access to blacklisted fields and calling of blacklisted APIs |
| // if the calling class is not trusted. |
| Method allowHiddenApiReflectionFrom; |
| try { |
| Class vmDebug = Class.forName("dalvik.system.VMDebug"); |
| allowHiddenApiReflectionFrom = vmDebug.getDeclaredMethod( |
| "allowHiddenApiReflectionFrom", Class.class); |
| } catch (ClassNotFoundException | NoSuchMethodException e) { |
| throw new IllegalStateException("Cannot find " |
| + "VMDebug#allowHiddenApiReflectionFrom."); |
| } |
| |
| // The StaticMockMethodAdvice is used by methods of spies to call the real methods. As |
| // the real methods might be blacklisted, this class needs to be marked as trusted. |
| try { |
| allowHiddenApiReflectionFrom.invoke(null, StaticMockMethodAdvice.class); |
| } catch (InvocationTargetException e) { |
| throw e.getCause(); |
| } |
| } catch (Throwable throwable) { |
| agent = null; |
| initializationError = throwable; |
| } |
| |
| AGENT = agent; |
| INITIALIZATION_ERROR = initializationError; |
| } |
| |
| /** |
| * All currently active mock markers. We modify the class's byte code. Some objects of the class |
| * are modified, some are not. This list helps the {@link MockMethodAdvice} help figure out if a |
| * object's method calls should be intercepted. |
| */ |
| private final HashMap<Object, InvocationHandlerAdapter> markerToHandler = new HashMap<>(); |
| private final Map<Class, Object> classToMarker = new HashMap<>(); |
| |
| /** |
| * Class doing the actual byte code transformation. |
| */ |
| private final StaticClassTransformer classTransformer; |
| |
| /** |
| * Create a new mock maker. |
| */ |
| public InlineStaticMockMaker() { |
| if (INITIALIZATION_ERROR != null) { |
| throw new RuntimeException("Could not initialize inline mock maker.\n" + "\n" + |
| "Release: Android " + Build.VERSION.RELEASE_OR_CODENAME + " " |
| + Build.VERSION.INCREMENTAL |
| + "Device: " + Build.BRAND + " " + Build.MODEL, INITIALIZATION_ERROR); |
| } |
| |
| classTransformer = new StaticClassTransformer(AGENT, InlineDexmakerMockMaker |
| .DISPATCHER_CLASS, markerToHandler, classToMarker); |
| } |
| |
| @Override |
| public <T> T createMock(MockCreationSettings<T> settings, MockHandler handler) { |
| Class<T> typeToMock = settings.getTypeToMock(); |
| if (!typeToMock.equals(mockingInProgressClass.get()) || Modifier.isAbstract(typeToMock |
| .getModifiers())) { |
| return null; |
| } |
| |
| Set<Class<?>> interfacesSet = settings.getExtraInterfaces(); |
| InvocationHandlerAdapter handlerAdapter = new InvocationHandlerAdapter(handler); |
| |
| classTransformer.mockClass(MockFeatures.withMockFeatures(typeToMock, interfacesSet)); |
| |
| Instantiator instantiator = Mockito.framework().getPlugins().getDefaultPlugin |
| (InstantiatorProvider2.class).getInstantiator(settings); |
| |
| T mock; |
| try { |
| mock = instantiator.newInstance(typeToMock); |
| } catch (org.mockito.creation.instance.InstantiationException e) { |
| throw new MockitoException("Unable to create mock instance of type '" + typeToMock |
| .getSimpleName() + "'", e); |
| } |
| |
| if (classToMarker.containsKey(typeToMock)) { |
| throw new MockitoException(typeToMock + " is already mocked"); |
| } |
| classToMarker.put(typeToMock, mock); |
| |
| markerToHandler.put(mock, handlerAdapter); |
| return mock; |
| } |
| |
| @Override |
| public void resetMock(Object mock, MockHandler newHandler, MockCreationSettings settings) { |
| InvocationHandlerAdapter adapter = getInvocationHandlerAdapter(mock); |
| if (adapter != null) { |
| if (mockingInProgressClass.get() == mock.getClass()) { |
| markerToHandler.remove(mock); |
| classToMarker.remove(mock.getClass()); |
| } else { |
| adapter.setHandler(newHandler); |
| } |
| } |
| } |
| |
| @Override |
| public TypeMockability isTypeMockable(final Class<?> type) { |
| if (mockingInProgressClass.get() == type) { |
| return new TypeMockability() { |
| @Override |
| public boolean mockable() { |
| return !Modifier.isAbstract(type.getModifiers()) && !type.isPrimitive() && type |
| != String.class; |
| } |
| |
| @Override |
| public String nonMockableReason() { |
| if (Modifier.isAbstract(type.getModifiers())) { |
| return "abstract type"; |
| } |
| |
| if (type.isPrimitive()) { |
| return "primitive type"; |
| } |
| |
| if (type == String.class) { |
| return "string"; |
| } |
| |
| return "not handled type"; |
| } |
| }; |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public MockHandler getHandler(Object mock) { |
| InvocationHandlerAdapter adapter = getInvocationHandlerAdapter(mock); |
| return adapter != null ? adapter.getHandler() : null; |
| } |
| |
| /** |
| * Get the {@link InvocationHandlerAdapter} registered for a marker. |
| * |
| * @param marker marker of the class that might have mocking set up |
| * @return adapter for this class, or {@code null} if not mocked |
| */ |
| private InvocationHandlerAdapter getInvocationHandlerAdapter(Object marker) { |
| if (marker == null) { |
| return null; |
| } |
| |
| return markerToHandler.get(marker); |
| } |
| } |