| /* |
| * 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.commons.compress.utils; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class SkipShieldingInputStreamTest { |
| |
| @Test |
| public void skipDelegatesToRead() throws IOException { |
| try (InputStream i = new SkipShieldingInputStream(new InputStream() { |
| @Override |
| public long skip(long n) { |
| Assert.fail("skip invoked"); |
| return -1; |
| } |
| @Override |
| public int read() { |
| return -1; |
| } |
| @Override |
| public int read(byte[] b, int off, int len) { |
| return len; |
| } |
| })) { |
| Assert.assertEquals(100, i.skip(100)); |
| } |
| } |
| |
| @Test |
| public void skipHasAnUpperBoundOnRead() throws IOException { |
| try (InputStream i = new SkipShieldingInputStream(new InputStream() { |
| @Override |
| public long skip(long n) { |
| Assert.fail("skip invoked"); |
| return -1; |
| } |
| @Override |
| public int read() { |
| return -1; |
| } |
| @Override |
| public int read(byte[] b, int off, int len) { |
| return len; |
| } |
| })) { |
| Assert.assertTrue(Integer.MAX_VALUE > i.skip(Long.MAX_VALUE)); |
| } |
| } |
| |
| @Test |
| public void skipSwallowsNegativeArguments() throws IOException { |
| try (InputStream i = new SkipShieldingInputStream(new InputStream() { |
| @Override |
| public long skip(long n) { |
| Assert.fail("skip invoked"); |
| return -1; |
| } |
| @Override |
| public int read() { |
| return -1; |
| } |
| @Override |
| public int read(byte[] b, int off, int len) { |
| Assert.fail("read invoked"); |
| return len; |
| } |
| })) { |
| Assert.assertEquals(0, i.skip(Long.MIN_VALUE)); |
| } |
| } |
| |
| } |