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/*
* Copyright (C) 2011 The Guava Authors
*
* 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.common.cache;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.util.concurrent.ExecutionError;
import com.google.common.util.concurrent.UncheckedExecutionException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
/**
* Unit test for {@link AbstractLoadingCache}.
*
* @author Charles Fry
*/
public class AbstractLoadingCacheTest extends TestCase {
public void testGetUnchecked_checked() {
final Exception cause = new Exception();
final AtomicReference<Object> valueRef = new AtomicReference<>();
LoadingCache<Object, Object> cache =
new AbstractLoadingCache<Object, Object>() {
@Override
public Object get(Object key) throws ExecutionException {
Object v = valueRef.get();
if (v == null) {
throw new ExecutionException(cause);
}
return v;
}
@Override
public Object getIfPresent(Object key) {
return valueRef.get();
}
};
try {
cache.getUnchecked(new Object());
fail();
} catch (UncheckedExecutionException expected) {
assertThat(expected).hasCauseThat().isEqualTo(cause);
}
Object newValue = new Object();
valueRef.set(newValue);
assertSame(newValue, cache.getUnchecked(new Object()));
}
public void testGetUnchecked_unchecked() {
final RuntimeException cause = new RuntimeException();
final AtomicReference<Object> valueRef = new AtomicReference<>();
LoadingCache<Object, Object> cache =
new AbstractLoadingCache<Object, Object>() {
@Override
public Object get(Object key) throws ExecutionException {
Object v = valueRef.get();
if (v == null) {
throw new ExecutionException(cause);
}
return v;
}
@Override
public Object getIfPresent(Object key) {
return valueRef.get();
}
};
try {
cache.getUnchecked(new Object());
fail();
} catch (UncheckedExecutionException expected) {
assertThat(expected).hasCauseThat().isEqualTo(cause);
}
Object newValue = new Object();
valueRef.set(newValue);
assertSame(newValue, cache.getUnchecked(new Object()));
}
public void testGetUnchecked_error() {
final Error cause = new Error();
final AtomicReference<Object> valueRef = new AtomicReference<>();
LoadingCache<Object, Object> cache =
new AbstractLoadingCache<Object, Object>() {
@Override
public Object get(Object key) throws ExecutionException {
Object v = valueRef.get();
if (v == null) {
throw new ExecutionError(cause);
}
return v;
}
@Override
public Object getIfPresent(Object key) {
return valueRef.get();
}
};
try {
cache.getUnchecked(new Object());
fail();
} catch (ExecutionError expected) {
assertThat(expected).hasCauseThat().isEqualTo(cause);
}
Object newValue = new Object();
valueRef.set(newValue);
assertSame(newValue, cache.getUnchecked(new Object()));
}
public void testGetUnchecked_otherThrowable() {
final Throwable cause = new Throwable();
final AtomicReference<Object> valueRef = new AtomicReference<>();
LoadingCache<Object, Object> cache =
new AbstractLoadingCache<Object, Object>() {
@Override
public Object get(Object key) throws ExecutionException {
Object v = valueRef.get();
if (v == null) {
throw new ExecutionException(cause);
}
return v;
}
@Override
public Object getIfPresent(Object key) {
return valueRef.get();
}
};
try {
cache.getUnchecked(new Object());
fail();
} catch (UncheckedExecutionException expected) {
assertThat(expected).hasCauseThat().isEqualTo(cause);
}
Object newValue = new Object();
valueRef.set(newValue);
assertSame(newValue, cache.getUnchecked(new Object()));
}
}
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