| /* |
| * 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 com.alibaba.dubbo.common.io; |
| |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PushbackInputStream; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertThat; |
| |
| public class StreamUtilsTest { |
| |
| @Test |
| public void testMarkSupportedInputStream() throws Exception { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| assertEquals(10, is.available()); |
| |
| is = new PushbackInputStream(is); |
| assertEquals(10, is.available()); |
| assertFalse(is.markSupported()); |
| |
| is = StreamUtils.markSupportedInputStream(is); |
| assertEquals(10, is.available()); |
| |
| is.mark(0); |
| assertEquals((int) '0', is.read()); |
| assertEquals((int) '1', is.read()); |
| |
| is.reset(); |
| assertEquals((int) '0', is.read()); |
| assertEquals((int) '1', is.read()); |
| assertEquals((int) '2', is.read()); |
| |
| is.mark(0); |
| assertEquals((int) '3', is.read()); |
| assertEquals((int) '4', is.read()); |
| assertEquals((int) '5', is.read()); |
| |
| is.reset(); |
| assertEquals((int) '3', is.read()); |
| assertEquals((int) '4', is.read()); |
| |
| is.mark(0); |
| assertEquals((int) '5', is.read()); |
| assertEquals((int) '6', is.read()); |
| |
| is.reset(); |
| assertEquals((int) '5', is.read()); |
| assertEquals((int) '6', is.read()); |
| assertEquals((int) '7', is.read()); |
| assertEquals((int) '8', is.read()); |
| assertEquals((int) '9', is.read()); |
| assertEquals(-1, is.read()); |
| assertEquals(-1, is.read()); |
| |
| is.mark(0); |
| assertEquals(-1, is.read()); |
| assertEquals(-1, is.read()); |
| |
| is.reset(); |
| assertEquals(-1, is.read()); |
| assertEquals(-1, is.read()); |
| } |
| |
| @Test |
| public void testLimitedInputStream() throws Exception { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| assertThat(10, is(is.available())); |
| |
| is = StreamUtils.limitedInputStream(is, 2); |
| assertThat(2, is(is.available())); |
| assertThat(is.markSupported(), is(true)); |
| |
| is.mark(0); |
| assertEquals((int) '0', is.read()); |
| assertEquals((int) '1', is.read()); |
| assertEquals(-1, is.read()); |
| |
| is.reset(); |
| is.skip(1); |
| assertEquals((int) '1', is.read()); |
| |
| is.reset(); |
| is.skip(-1); |
| assertEquals((int) '0', is.read()); |
| |
| is.reset(); |
| byte[] bytes = new byte[2]; |
| int read = is.read(bytes, 1, 1); |
| assertThat(read, is(1)); |
| |
| is.reset(); |
| StreamUtils.skipUnusedStream(is); |
| assertEquals(-1, is.read()); |
| |
| is.close(); |
| } |
| |
| @Test(expected = IOException.class) |
| public void testMarkInputSupport() throws IOException { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| is = StreamUtils.markSupportedInputStream(new PushbackInputStream(is), 1); |
| |
| is.mark(1); |
| int read = is.read(); |
| assertThat(read, is((int) '0')); |
| |
| is.skip(1); |
| is.read(); |
| } |
| |
| @Test |
| public void testSkipForOriginMarkSupportInput() { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| InputStream newIs = StreamUtils.markSupportedInputStream(is, 1); |
| |
| assertThat(newIs, is(is)); |
| } |
| |
| @Test(expected = NullPointerException.class) |
| public void testReadEmptyByteArray() throws IOException { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| is = StreamUtils.limitedInputStream(is, 2); |
| is.read(null, 0, 1); |
| } |
| |
| @Test(expected = IndexOutOfBoundsException.class) |
| public void testReadWithWrongOffset() throws IOException { |
| InputStream is = StreamUtilsTest.class.getResourceAsStream("/StreamUtilsTest.txt"); |
| is = StreamUtils.limitedInputStream(is, 2); |
| is.read(new byte[1], -1, 1); |
| } |
| } |