| /* |
| * Copyright (C) 2014 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.google.android.apps.common.testing.ui.espresso.base; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.base.Throwables.propagate; |
| |
| import com.google.android.apps.common.testing.testrunner.inject.TargetContext; |
| import com.google.android.apps.common.testing.ui.espresso.EspressoException; |
| import com.google.android.apps.common.testing.ui.espresso.FailureHandler; |
| import com.google.android.apps.common.testing.ui.espresso.PerformException; |
| |
| import android.content.Context; |
| import android.view.View; |
| |
| import junit.framework.AssertionFailedError; |
| |
| import org.hamcrest.Matcher; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * Espresso's default {@link FailureHandler}. If this does not fit your needs, feel free to provide |
| * your own implementation via Espresso.setFailureHandler(FailureHandler). |
| */ |
| public final class DefaultFailureHandler implements FailureHandler { |
| |
| private static final AtomicInteger failureCount = new AtomicInteger(0); |
| private final Context appContext; |
| |
| @Inject |
| public DefaultFailureHandler(@TargetContext Context appContext) { |
| this.appContext = checkNotNull(appContext); |
| } |
| |
| @Override |
| public void handle(Throwable error, Matcher<View> viewMatcher) { |
| if (error instanceof EspressoException || error instanceof AssertionFailedError |
| || error instanceof AssertionError) { |
| throw propagate(getUserFriendlyError(error, viewMatcher)); |
| } else { |
| throw propagate(error); |
| } |
| } |
| |
| /** |
| * When the error is coming from espresso, it is more user friendly to: |
| * 1. propagate assertions as assertions |
| * 2. swap the stack trace of the error to that of current thread (which will show |
| * directly where the actual problem is) |
| */ |
| private Throwable getUserFriendlyError(Throwable error, Matcher<View> viewMatcher) { |
| if (error instanceof PerformException) { |
| // Re-throw the exception with the viewMatcher (used to locate the view) as the view |
| // description (makes the error more readable). The reason we do this here: not all creators |
| // of PerformException have access to the viewMatcher. |
| throw new PerformException.Builder() |
| .from((PerformException) error) |
| .withViewDescription(viewMatcher.toString()) |
| .build(); |
| } |
| |
| if (error instanceof AssertionError) { |
| // reports Failure instead of Error. |
| // assertThat(...) throws an AssertionFailedError. |
| error = new AssertionFailedWithCauseError(error.getMessage(), error); |
| } |
| |
| error.setStackTrace(Thread.currentThread().getStackTrace()); |
| return error; |
| } |
| |
| private static final class AssertionFailedWithCauseError extends AssertionFailedError { |
| /* junit hides the cause constructor. */ |
| public AssertionFailedWithCauseError(String message, Throwable cause) { |
| super(message); |
| initCause(cause); |
| } |
| } |
| } |