100 lines
3.3 KiB
Java
100 lines
3.3 KiB
Java
/*
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* Copyright (C) 2012 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.io;
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import static org.mockito.Mockito.doThrow;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.verify;
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import java.io.Flushable;
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import java.io.IOException;
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import junit.framework.TestCase;
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/**
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* Unit tests for {@link Flushables}.
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*
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* <p>Checks proper flushing behavior, and ensures that IOExceptions on Flushable.flush() are not
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* propagated out from the {@link Flushables#flush} method if {@code swallowException} is true.
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*
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* @author Michael Lancaster
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*/
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public class FlushablesTest extends TestCase {
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private Flushable mockFlushable;
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public void testFlush_clean() throws IOException {
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// make sure that no exception is thrown regardless of value of
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// 'swallowException' when the mock does not throw an exception.
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setupFlushable(false);
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doFlush(mockFlushable, false, false);
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setupFlushable(false);
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doFlush(mockFlushable, true, false);
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}
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public void testFlush_flushableWithEatenException() throws IOException {
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// make sure that no exception is thrown if 'swallowException' is true
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// when the mock does throw an exception on flush.
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setupFlushable(true);
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doFlush(mockFlushable, true, false);
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}
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public void testFlush_flushableWithThrownException() throws IOException {
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// make sure that the exception is thrown if 'swallowException' is false
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// when the mock does throw an exception on flush.
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setupFlushable(true);
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doFlush(mockFlushable, false, true);
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}
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public void testFlushQuietly_flushableWithEatenException() throws IOException {
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// make sure that no exception is thrown by flushQuietly when the mock does
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// throw an exception on flush.
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setupFlushable(true);
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Flushables.flushQuietly(mockFlushable);
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}
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// Set up a flushable to expect to be flushed, and optionally to
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// throw an exception.
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private void setupFlushable(boolean shouldThrowOnFlush) throws IOException {
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mockFlushable = mock(Flushable.class);
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if (shouldThrowOnFlush) {
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doThrow(
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new IOException(
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"This should only appear in the " + "logs. It should not be rethrown."))
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.when(mockFlushable)
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.flush();
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}
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}
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// Flush the flushable using the Flushables, passing in the swallowException
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// parameter. expectThrown determines whether we expect an exception to
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// be thrown by Flushables.flush;
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private void doFlush(Flushable flushable, boolean swallowException, boolean expectThrown)
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throws IOException {
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try {
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Flushables.flush(flushable, swallowException);
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if (expectThrown) {
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fail("Didn't throw exception.");
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}
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} catch (IOException e) {
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if (!expectThrown) {
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fail("Threw exception");
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}
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}
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verify(flushable).flush();
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}
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}
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