RunBefores.java
/*
* Copyright (C) 2016 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 androidx.test.internal.runner.junit4.statement;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.Statement;
/** <code>@UiThreadTest</code> aware implementation of {@link RunBefores}. */
public class RunBefores extends UiThreadStatement {
private final Statement next;
private final Object target;
private final List<FrameworkMethod> befores;
/**
* Run all non-overridden {@code @Before} methods on this class and superclasses before running
* {@code next}; if any throws an Exception, stop execution and pass the exception on.
*
* <p>{@code @Before} methods that also annotated with <code>@UiThreadTest</code> will be executed
* on the UI Thread.
*
* @param next the original statement
* @param befores methods annotated with {@code @Before}
* @param target the test case instance
*/
public RunBefores(
FrameworkMethod method, Statement next, List<FrameworkMethod> befores, Object target) {
super(next, shouldRunOnUiThread(method));
this.next = next;
this.befores = befores;
this.target = target;
}
@Override
public void evaluate() throws Throwable {
final AtomicReference<Throwable> exceptionRef = new AtomicReference<>();
for (final FrameworkMethod before : befores) {
if (shouldRunOnUiThread(before)) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
try {
before.invokeExplosively(target);
} catch (Throwable throwable) {
exceptionRef.set(throwable);
}
}
});
// if any Exception thrown, stop execution and pass the exception on.
Throwable throwable = exceptionRef.get();
if (throwable != null) {
throw throwable;
}
} else {
before.invokeExplosively(target);
}
}
next.evaluate();
}
}