GraphHolder.java
/*
* 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 androidx.test.espresso;
import static androidx.test.internal.util.Checks.checkNotNull;
import android.util.Log;
import androidx.test.espresso.base.ActiveRootLister;
import androidx.test.platform.io.PlatformTestStorage;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReference;
/** Holds Espresso's object graph. */
public final class GraphHolder {
private static final String TAG = GraphHolder.class.getSimpleName();
private static final AtomicReference<GraphHolder> instance =
new AtomicReference<GraphHolder>(null);
private final BaseLayerComponent component;
private GraphHolder(BaseLayerComponent component) {
this.component = checkNotNull(component);
}
static BaseLayerComponent baseLayer() {
GraphHolder instanceRef = instance.get();
if (null == instanceRef) {
instanceRef = new GraphHolder(DaggerBaseLayerComponent.create());
if (instance.compareAndSet(null, instanceRef)) {
// Also adds the usage data as test output properties. By default it's no-op.
Map<String, Serializable> usageProperties = new HashMap<>();
usageProperties.put("Espresso", "1");
addUsageToOutputProperties(usageProperties, instanceRef.component.testStorage());
return instanceRef.component;
} else {
return instance.get().component;
}
} else {
return instanceRef.component;
}
}
private static void addUsageToOutputProperties(
Map<String, Serializable> usageProperties, PlatformTestStorage testStorage) {
try {
testStorage.addOutputProperties(usageProperties);
} catch (RuntimeException e) {
// The properties.dat file can be created only once on an automotive emulator with API 30,
// which causes the `addOutputProperties` call to fail when running multiple test cases. Catch
// the exception and log until the issue is fixed in the emulator.
Log.w(
TAG,
"Failed to add the output properties. This could happen when running on Robolectric or an"
+ " automotive emulator with API 30. Ignore for now.");
}
}
}