| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.hadoop.io; |
| |
| import java.io.IOException; |
| |
| import junit.framework.TestCase; |
| import java.util.Arrays; |
| import java.util.Random; |
| |
| |
| /** Unit tests for BoundedByteArrayOutputStream */ |
| public class TestBoundedByteArrayOutputStream extends TestCase { |
| |
| private static final int SIZE = 1024; |
| private static final byte[] INPUT = new byte[SIZE]; |
| static { |
| new Random().nextBytes(INPUT); |
| } |
| |
| public void testBoundedStream() throws IOException { |
| |
| BoundedByteArrayOutputStream stream = |
| new BoundedByteArrayOutputStream(SIZE); |
| |
| // Write to the stream, get the data back and check for contents |
| stream.write(INPUT, 0, SIZE); |
| assertTrue("Array Contents Mismatch", |
| Arrays.equals(INPUT, stream.getBuffer())); |
| |
| // Try writing beyond end of buffer. Should throw an exception |
| boolean caughtException = false; |
| |
| try { |
| stream.write(INPUT[0]); |
| } catch (Exception e) { |
| caughtException = true; |
| } |
| |
| assertTrue("Writing beyond limit did not throw an exception", |
| caughtException); |
| |
| //Reset the stream and try, should succeed |
| stream.reset(); |
| assertTrue("Limit did not get reset correctly", |
| (stream.getLimit() == SIZE)); |
| stream.write(INPUT, 0, SIZE); |
| assertTrue("Array Contents Mismatch", |
| Arrays.equals(INPUT, stream.getBuffer())); |
| |
| // Try writing one more byte, should fail |
| caughtException = false; |
| try { |
| stream.write(INPUT[0]); |
| } catch (Exception e) { |
| caughtException = true; |
| } |
| |
| // Reset the stream, but set a lower limit. Writing beyond |
| // the limit should throw an exception |
| stream.reset(SIZE - 1); |
| assertTrue("Limit did not get reset correctly", |
| (stream.getLimit() == SIZE -1)); |
| caughtException = false; |
| |
| try { |
| stream.write(INPUT, 0, SIZE); |
| } catch (Exception e) { |
| caughtException = true; |
| } |
| |
| assertTrue("Writing beyond limit did not throw an exception", |
| caughtException); |
| } |
| } |