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/*
* Copyright (C) 2008 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.util.concurrent;
import static com.google.common.util.concurrent.Futures.transform;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import com.google.common.base.Function;
import java.lang.reflect.UndeclaredThrowableException;
/**
* Unit tests for {@link Futures#transform(ListenableFuture, Function, Executor)}.
*
* @author Nishant Thakkar
*/
public class FuturesTransformTest extends AbstractChainedListenableFutureTest<String> {
private static final String RESULT_DATA = "SUCCESS";
private static final UndeclaredThrowableException WRAPPED_EXCEPTION =
new UndeclaredThrowableException(EXCEPTION);
@Override
protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
return transform(inputFuture, new ComposeFunction(), directExecutor());
}
@Override
protected String getSuccessfulResult() {
return RESULT_DATA;
}
private class ComposeFunction implements Function<Integer, String> {
@Override
public String apply(Integer input) {
if (input.intValue() == VALID_INPUT_DATA) {
return RESULT_DATA;
} else {
throw WRAPPED_EXCEPTION;
}
}
}
public void testFutureGetThrowsFunctionException() throws Exception {
inputFuture.set(EXCEPTION_DATA);
listener.assertException(WRAPPED_EXCEPTION);
}
}
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