| /* |
| * 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 org.apache.commons.io.IOUtils; |
| import org.apache.commons.io.output.NullOutputStream; |
| import org.junit.Test; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| /** |
| * Tests the CountingInputStream. |
| * |
| * @version $Id$ |
| */ |
| public class CountingInputStreamTest { |
| |
| @Test |
| public void testCounting() throws Exception { |
| final String text = "A piece of text"; |
| final byte[] bytes = text.getBytes(); |
| final ByteArrayInputStream bais = new ByteArrayInputStream(bytes); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| // have to declare this larger as we're going to read |
| // off the end of the stream and input stream seems |
| // to do bounds checking |
| final byte[] result = new byte[21]; |
| |
| final byte[] ba = new byte[5]; |
| int found = cis.read(ba); |
| System.arraycopy(ba, 0, result, 0, 5); |
| assertEquals( found, cis.getCount() ); |
| |
| final int value = cis.read(); |
| found++; |
| result[5] = (byte)value; |
| assertEquals( found, cis.getCount() ); |
| |
| found += cis.read(result, 6, 5); |
| assertEquals( found, cis.getCount() ); |
| |
| found += cis.read(result, 11, 10); // off the end |
| assertEquals( found, cis.getCount() ); |
| |
| // trim to get rid of the 6 empty values |
| final String textResult = new String(result).trim(); |
| assertEquals(textResult, text); |
| cis.close(); |
| } |
| |
| |
| /* |
| * Test for files > 2GB in size - see issue IO-84 |
| */ |
| @Test |
| public void testLargeFiles_IO84() throws Exception { |
| final long size = (long)Integer.MAX_VALUE + (long)1; |
| final NullInputStream mock = new NullInputStream(size); |
| final CountingInputStream cis = new CountingInputStream(mock); |
| final OutputStream out = new NullOutputStream(); |
| |
| // Test integer methods |
| IOUtils.copyLarge(cis, out); |
| try { |
| cis.getCount(); |
| fail("Expected getCount() to throw an ArithmeticException"); |
| } catch (final ArithmeticException ae) { |
| // expected result |
| } |
| try { |
| cis.resetCount(); |
| fail("Expected resetCount() to throw an ArithmeticException"); |
| } catch (final ArithmeticException ae) { |
| // expected result |
| } |
| |
| mock.close(); |
| |
| // Test long methods |
| IOUtils.copyLarge(cis, out); |
| assertEquals("getByteCount()", size, cis.getByteCount()); |
| assertEquals("resetByteCount()", size, cis.resetByteCount()); |
| } |
| |
| @Test |
| public void testResetting() throws Exception { |
| final String text = "A piece of text"; |
| final byte[] bytes = text.getBytes(); |
| final ByteArrayInputStream bais = new ByteArrayInputStream(bytes); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final byte[] result = new byte[bytes.length]; |
| |
| int found = cis.read(result, 0, 5); |
| assertEquals( found, cis.getCount() ); |
| |
| final int count = cis.resetCount(); |
| found = cis.read(result, 6, 5); |
| assertEquals( found, count ); |
| cis.close(); |
| } |
| |
| @Test |
| public void testZeroLength1() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[0]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final int found = cis.read(); |
| assertEquals(-1, found); |
| assertEquals(0, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testZeroLength2() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[0]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final byte[] result = new byte[10]; |
| |
| final int found = cis.read(result); |
| assertEquals(-1, found); |
| assertEquals(0, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testZeroLength3() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[0]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final byte[] result = new byte[10]; |
| |
| final int found = cis.read(result, 0, 5); |
| assertEquals(-1, found); |
| assertEquals(0, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testEOF1() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[2]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| int found = cis.read(); |
| assertEquals(0, found); |
| assertEquals(1, cis.getCount()); |
| found = cis.read(); |
| assertEquals(0, found); |
| assertEquals(2, cis.getCount()); |
| found = cis.read(); |
| assertEquals(-1, found); |
| assertEquals(2, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testEOF2() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[2]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final byte[] result = new byte[10]; |
| |
| final int found = cis.read(result); |
| assertEquals(2, found); |
| assertEquals(2, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testEOF3() throws Exception { |
| final ByteArrayInputStream bais = new ByteArrayInputStream(new byte[2]); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| final byte[] result = new byte[10]; |
| |
| final int found = cis.read(result, 0, 5); |
| assertEquals(2, found); |
| assertEquals(2, cis.getCount()); |
| cis.close(); |
| } |
| |
| @Test |
| public void testSkipping() throws IOException { |
| final String text = "Hello World!"; |
| final byte[] bytes = text.getBytes(); |
| final ByteArrayInputStream bais = new ByteArrayInputStream(bytes); |
| final CountingInputStream cis = new CountingInputStream(bais); |
| |
| assertEquals(6,cis.skip(6)); |
| assertEquals(6,cis.getCount()); |
| final byte[] result = new byte[6]; |
| cis.read(result); |
| |
| assertEquals("World!",new String(result)); |
| assertEquals(12,cis.getCount()); |
| cis.close(); |
| } |
| |
| } |