TestLoader.java
/*
* Copyright (C) 2012 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 androidx.annotation.Nullable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.junit.runner.Runner;
import org.junit.runners.model.RunnerBuilder;
/**
* An abstract class for loading JUnit3 and JUnit4 test classes given a set of potential class
* names.
*/
public abstract class TestLoader {
/** Factory for {@link TestLoader} */
public static class Factory {
private Factory() {}
public static TestLoader create(
@Nullable ClassLoader classLoader, RunnerBuilder runnerBuilder, boolean scanningPath) {
if (classLoader == null) {
classLoader = TestLoader.class.getClassLoader();
}
if (scanningPath) {
return new ScanningTestLoader(classLoader, runnerBuilder);
} else {
return new DirectTestLoader(classLoader, runnerBuilder);
}
}
}
protected abstract Runner doCreateRunner(String className);
/**
* Get the {@link Collection) of {@link Runner runners}.
*/
public List<Runner> getRunnersFor(Collection<String> classNames) {
final Map<String, Runner> runnersMap = new LinkedHashMap<>();
for (String className : classNames) {
if (!runnersMap.containsKey(className)) {
Runner runner = doCreateRunner(className);
if (runner != null) {
runnersMap.put(className, runner);
}
}
}
return new ArrayList<>(runnersMap.values());
}
}