DirectTestLoader.java
/*
* Copyright (C) 2021 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;
import android.util.Log;
import org.junit.runner.Runner;
import org.junit.runners.model.RunnerBuilder;
/**
* A class for loading JUnit3 and JUnit4 test classes given a set of class names.
*
* <p>This variant of TestLoader will strictly report any errors loading the class.
*/
class DirectTestLoader extends TestLoader {
private static final String LOG_TAG = "DirectTestLoader";
private final ClassLoader classLoader;
private final RunnerBuilder runnerBuilder;
DirectTestLoader(ClassLoader classLoader, RunnerBuilder runnerBuilder) {
this.classLoader = classLoader;
this.runnerBuilder = runnerBuilder;
}
@Override
protected Runner doCreateRunner(String className) {
// this method should always return a non-null runner.
try {
Class<?> loadedClass = Class.forName(className, false, classLoader);
return runnerBuilder.safeRunnerForClass(loadedClass);
// Can get NoClassDefFoundError on Android L when a class extends a non-existent class.
} catch (ClassNotFoundException | LinkageError e) {
String msg = String.format("Failed loading specified test class '%s'", className);
Log.e(LOG_TAG, msg, e);
return new ErrorReportingRunner(className, new RuntimeException(msg, e));
}
}
}