| /* |
| * 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.io.input; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| |
| import java.io.ByteArrayInputStream; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Tests for {@link BoundedInputStream}. |
| * |
| */ |
| public class BoundedInputStreamTest { |
| |
| @Test |
| public void testReadSingle() throws Exception { |
| BoundedInputStream bounded; |
| final byte[] helloWorld = "Hello World".getBytes(); |
| final byte[] hello = "Hello".getBytes(); |
| |
| // limit = length |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length); |
| for (int i = 0; i < helloWorld.length; i++) { |
| assertEquals(helloWorld[i], bounded.read(), "limit = length byte[" + i + "]"); |
| } |
| assertEquals(-1, bounded.read(), "limit = length end"); |
| |
| // limit > length |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length + 1); |
| for (int i = 0; i < helloWorld.length; i++) { |
| assertEquals(helloWorld[i], bounded.read(), "limit > length byte[" + i + "]"); |
| } |
| assertEquals(-1, bounded.read(), "limit > length end"); |
| |
| // limit < length |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), hello.length); |
| for (int i = 0; i < hello.length; i++) { |
| assertEquals(hello[i], bounded.read(), "limit < length byte[" + i + "]"); |
| } |
| assertEquals(-1, bounded.read(), "limit < length end"); |
| } |
| |
| @Test |
| public void testReadArray() throws Exception { |
| |
| BoundedInputStream bounded; |
| final byte[] helloWorld = "Hello World".getBytes(); |
| final byte[] hello = "Hello".getBytes(); |
| |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld)); |
| compare("limit = -1", helloWorld, IOUtils.toByteArray(bounded)); |
| |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), 0); |
| compare("limit = 0", IOUtils.EMPTY_BYTE_ARRAY, IOUtils.toByteArray(bounded)); |
| |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length); |
| compare("limit = length", helloWorld, IOUtils.toByteArray(bounded)); |
| |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length + 1); |
| compare("limit > length", helloWorld, IOUtils.toByteArray(bounded)); |
| |
| bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length - 6); |
| compare("limit < length", hello, IOUtils.toByteArray(bounded)); |
| } |
| |
| private void compare(final String msg, final byte[] expected, final byte[] actual) { |
| assertEquals(expected.length, actual.length, msg + " length"); |
| for (int i = 0; i < expected.length; i++) { |
| assertEquals(expected[i], actual[i], msg + " byte[" + i + "]"); |
| } |
| } |
| } |