| /* |
| * Copyright (C) 2012 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.io; |
| |
| import static org.mockito.Mockito.doThrow; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.verify; |
| |
| import java.io.Flushable; |
| import java.io.IOException; |
| import junit.framework.TestCase; |
| |
| /** |
| * Unit tests for {@link Flushables}. |
| * |
| * <p>Checks proper flushing behavior, and ensures that IOExceptions on Flushable.flush() are not |
| * propagated out from the {@link Flushables#flush} method if {@code swallowException} is true. |
| * |
| * @author Michael Lancaster |
| */ |
| public class FlushablesTest extends TestCase { |
| private Flushable mockFlushable; |
| |
| public void testFlush_clean() throws IOException { |
| // make sure that no exception is thrown regardless of value of |
| // 'swallowException' when the mock does not throw an exception. |
| setupFlushable(false); |
| doFlush(mockFlushable, false, false); |
| |
| setupFlushable(false); |
| doFlush(mockFlushable, true, false); |
| } |
| |
| public void testFlush_flushableWithEatenException() throws IOException { |
| // make sure that no exception is thrown if 'swallowException' is true |
| // when the mock does throw an exception on flush. |
| setupFlushable(true); |
| doFlush(mockFlushable, true, false); |
| } |
| |
| public void testFlush_flushableWithThrownException() throws IOException { |
| // make sure that the exception is thrown if 'swallowException' is false |
| // when the mock does throw an exception on flush. |
| setupFlushable(true); |
| doFlush(mockFlushable, false, true); |
| } |
| |
| public void testFlushQuietly_flushableWithEatenException() throws IOException { |
| // make sure that no exception is thrown by flushQuietly when the mock does |
| // throw an exception on flush. |
| setupFlushable(true); |
| Flushables.flushQuietly(mockFlushable); |
| } |
| |
| // Set up a flushable to expect to be flushed, and optionally to |
| // throw an exception. |
| private void setupFlushable(boolean shouldThrowOnFlush) throws IOException { |
| mockFlushable = mock(Flushable.class); |
| if (shouldThrowOnFlush) { |
| doThrow( |
| new IOException( |
| "This should only appear in the " + "logs. It should not be rethrown.")) |
| .when(mockFlushable) |
| .flush(); |
| } |
| } |
| |
| // Flush the flushable using the Flushables, passing in the swallowException |
| // parameter. expectThrown determines whether we expect an exception to |
| // be thrown by Flushables.flush; |
| private void doFlush(Flushable flushable, boolean swallowException, boolean expectThrown) |
| throws IOException { |
| try { |
| Flushables.flush(flushable, swallowException); |
| if (expectThrown) { |
| fail("Didn't throw exception."); |
| } |
| } catch (IOException e) { |
| if (!expectThrown) { |
| fail("Threw exception"); |
| } |
| } |
| verify(flushable).flush(); |
| } |
| } |