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binder: Add fault injection hooksunit tests for BinderClientTransport (…
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100
binder/src/androidTest/java/io/grpc/binder/internal/OneWayBinderProxies.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Copyright 2024 The gRPC 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 io.grpc.binder.internal; | ||
|
|
||
| import android.os.RemoteException; | ||
| import java.util.concurrent.BlockingQueue; | ||
| import java.util.concurrent.LinkedBlockingQueue; | ||
| import javax.annotation.Nullable; | ||
|
|
||
| /** | ||
| * A collection of {@link OneWayBinderProxy}-related test helpers. | ||
| */ | ||
| public final class OneWayBinderProxies { | ||
| /** | ||
| * A {@link OneWayBinderProxy.Decorator} that blocks calling threads while an (external) test | ||
| * provides the actual decoration. | ||
| */ | ||
| public static final class BlockingBinderDecorator<T extends OneWayBinderProxy> implements | ||
| OneWayBinderProxy.Decorator { | ||
| private final BlockingQueue<OneWayBinderProxy> requests = new LinkedBlockingQueue<>(); | ||
| private final BlockingQueue<T> results = new LinkedBlockingQueue<>(); | ||
|
|
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| /** | ||
| * Returns the next {@link OneWayBinderProxy} that needs decorating, blocking if it hasn't yet | ||
| * been provided to {@link #decorate}. | ||
| * | ||
| * <p>Follow this with a call to {@link #putNextResult(OneWayBinderProxy)} to provide | ||
| * the result of {@link #decorate} and unblock the waiting caller. | ||
| */ | ||
| public OneWayBinderProxy takeNextRequest() throws InterruptedException { | ||
| return requests.take(); | ||
| } | ||
|
|
||
| /** | ||
| * Provides the next value to return from {@link #decorate}. | ||
| */ | ||
| public void putNextResult(T next) throws InterruptedException { | ||
| results.put(next); | ||
| } | ||
|
|
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| @Override | ||
| public OneWayBinderProxy decorate(OneWayBinderProxy in) { | ||
| try { | ||
| requests.put(in); | ||
| return results.take(); | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * A {@link OneWayBinderProxy} decorator whose transact method can artificially throw. | ||
| */ | ||
| public static final class ThrowingOneWayBinderProxy extends OneWayBinderProxy { | ||
| private final OneWayBinderProxy wrapped; | ||
| @Nullable | ||
| private RemoteException remoteException; | ||
|
|
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| ThrowingOneWayBinderProxy(OneWayBinderProxy wrapped) { | ||
| super(wrapped.getDelegate()); | ||
| this.wrapped = wrapped; | ||
| } | ||
|
|
||
| /** | ||
| * Causes all future invocations of transact to throw `remoteException`. | ||
| * | ||
| * <p>Users are responsible for ensuring their calls "happen-before" the relevant calls to | ||
| * {@link #transact(int, ParcelHolder)}. | ||
| */ | ||
| public void setRemoteException(RemoteException remoteException) { | ||
| this.remoteException = remoteException; | ||
| } | ||
|
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| @Override | ||
| public void transact(int code, ParcelHolder data) throws RemoteException { | ||
| if (remoteException != null) { | ||
| throw remoteException; | ||
| } | ||
| wrapped.transact(code, data); | ||
| } | ||
| } | ||
|
|
||
| // Cannot be instantiated. | ||
| private OneWayBinderProxies() {}; | ||
| } |
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