| /* |
| * Copyright (C) 2009, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.util.io; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| |
| import org.junit.Test; |
| |
| public class UnionInputStreamTest { |
| @Test |
| public void testEmptyStream() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| assertTrue(u.isEmpty()); |
| assertEquals(-1, u.read()); |
| assertEquals(-1, u.read(new byte[1], 0, 1)); |
| assertEquals(0, u.available()); |
| assertEquals(0, u.skip(1)); |
| } |
| } |
| |
| @Test |
| public void testReadSingleBytes() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| assertTrue(u.isEmpty()); |
| u.add(new ByteArrayInputStream(new byte[] { 1, 0, 2 })); |
| u.add(new ByteArrayInputStream(new byte[] { 3 })); |
| u.add(new ByteArrayInputStream(new byte[] { 4, 5 })); |
| |
| assertFalse(u.isEmpty()); |
| assertEquals(3, u.available()); |
| assertEquals(1, u.read()); |
| assertEquals(0, u.read()); |
| assertEquals(2, u.read()); |
| assertEquals(0, u.available()); |
| |
| assertEquals(3, u.read()); |
| assertEquals(0, u.available()); |
| |
| assertEquals(4, u.read()); |
| assertEquals(1, u.available()); |
| assertEquals(5, u.read()); |
| assertEquals(0, u.available()); |
| assertEquals(-1, u.read()); |
| |
| assertTrue(u.isEmpty()); |
| u.add(new ByteArrayInputStream(new byte[] { (byte) 255 })); |
| assertEquals(255, u.read()); |
| assertEquals(-1, u.read()); |
| assertTrue(u.isEmpty()); |
| } |
| } |
| |
| @Test |
| public void testReadByteBlocks() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| u.add(new ByteArrayInputStream(new byte[] { 1, 0, 2 })); |
| u.add(new ByteArrayInputStream(new byte[] { 3 })); |
| u.add(new ByteArrayInputStream(new byte[] { 4, 5 })); |
| |
| final byte[] r = new byte[5]; |
| assertEquals(3, u.read(r, 0, 5)); |
| assertTrue(Arrays.equals(new byte[] { 1, 0, 2, }, slice(r, 3))); |
| assertEquals(1, u.read(r, 0, 5)); |
| assertEquals(3, r[0]); |
| assertEquals(2, u.read(r, 0, 5)); |
| assertTrue(Arrays.equals(new byte[] { 4, 5, }, slice(r, 2))); |
| assertEquals(-1, u.read(r, 0, 5)); |
| } |
| } |
| |
| private static byte[] slice(byte[] in, int len) { |
| byte[] r = new byte[len]; |
| System.arraycopy(in, 0, r, 0, len); |
| return r; |
| } |
| |
| @Test |
| public void testArrayConstructor() throws IOException { |
| try (UnionInputStream u = new UnionInputStream( |
| new ByteArrayInputStream(new byte[] { 1, 0, 2 }), |
| new ByteArrayInputStream(new byte[] { 3 }), |
| new ByteArrayInputStream(new byte[] { 4, 5 }))) { |
| final byte[] r = new byte[5]; |
| assertEquals(3, u.read(r, 0, 5)); |
| assertTrue(Arrays.equals(new byte[] { 1, 0, 2, }, slice(r, 3))); |
| assertEquals(1, u.read(r, 0, 5)); |
| assertEquals(3, r[0]); |
| assertEquals(2, u.read(r, 0, 5)); |
| assertTrue(Arrays.equals(new byte[] { 4, 5, }, slice(r, 2))); |
| assertEquals(-1, u.read(r, 0, 5)); |
| } |
| } |
| |
| @Test |
| public void testMarkSupported() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| assertFalse(u.markSupported()); |
| u.add(new ByteArrayInputStream(new byte[] { 1, 0, 2 })); |
| assertFalse(u.markSupported()); |
| } |
| } |
| |
| @Test |
| public void testSkip() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| u.add(new ByteArrayInputStream(new byte[] { 1, 0, 2 })); |
| u.add(new ByteArrayInputStream(new byte[] { 3 })); |
| u.add(new ByteArrayInputStream(new byte[] { 4, 5 })); |
| assertEquals(0, u.skip(0)); |
| assertEquals(3, u.skip(3)); |
| assertEquals(3, u.read()); |
| assertEquals(2, u.skip(5)); |
| assertEquals(0, u.skip(5)); |
| assertEquals(-1, u.read()); |
| |
| u.add(new ByteArrayInputStream(new byte[] { 20, 30 }) { |
| @Override |
| @SuppressWarnings("UnsynchronizedOverridesSynchronized") |
| // This is only used in tests and is thread-safe |
| public long skip(long n) { |
| return 0; |
| } |
| }); |
| assertEquals(2, u.skip(8)); |
| assertEquals(-1, u.read()); |
| } |
| } |
| |
| @Test |
| public void testAutoCloseDuringRead() throws IOException { |
| try (UnionInputStream u = new UnionInputStream()) { |
| final boolean closed[] = new boolean[2]; |
| u.add(new ByteArrayInputStream(new byte[] { 1 }) { |
| @Override |
| public void close() { |
| closed[0] = true; |
| } |
| }); |
| u.add(new ByteArrayInputStream(new byte[] { 2 }) { |
| @Override |
| public void close() { |
| closed[1] = true; |
| } |
| }); |
| |
| assertFalse(closed[0]); |
| assertFalse(closed[1]); |
| |
| assertEquals(1, u.read()); |
| assertFalse(closed[0]); |
| assertFalse(closed[1]); |
| |
| assertEquals(2, u.read()); |
| assertTrue(closed[0]); |
| assertFalse(closed[1]); |
| |
| assertEquals(-1, u.read()); |
| assertTrue(closed[0]); |
| assertTrue(closed[1]); |
| } |
| } |
| |
| @Test |
| public void testCloseDuringClose() throws IOException { |
| final boolean closed[] = new boolean[2]; |
| try (UnionInputStream u = new UnionInputStream()) { |
| u.add(new ByteArrayInputStream(new byte[] { 1 }) { |
| @Override |
| public void close() { |
| closed[0] = true; |
| } |
| }); |
| u.add(new ByteArrayInputStream(new byte[] { 2 }) { |
| @Override |
| public void close() { |
| closed[1] = true; |
| } |
| }); |
| |
| assertFalse(closed[0]); |
| assertFalse(closed[1]); |
| } |
| |
| assertTrue(closed[0]); |
| assertTrue(closed[1]); |
| } |
| |
| @Test |
| public void testExceptionDuringClose() { |
| @SuppressWarnings("resource") // We are testing the close() method |
| final UnionInputStream u = new UnionInputStream(); |
| u.add(new ByteArrayInputStream(new byte[] { 1 }) { |
| @Override |
| public void close() throws IOException { |
| throw new IOException("I AM A TEST"); |
| } |
| }); |
| try { |
| u.close(); |
| fail("close ignored inner stream exception"); |
| } catch (IOException e) { |
| assertEquals("I AM A TEST", e.getMessage()); |
| } |
| } |
| |
| @Test |
| public void testNonBlockingPartialRead() throws Exception { |
| InputStream errorReadStream = new InputStream() { |
| @Override |
| public int read() throws IOException { |
| throw new IOException("Expected"); |
| } |
| |
| @Override |
| public int read(byte b[], int off, int len) throws IOException { |
| throw new IOException("Expected"); |
| } |
| }; |
| try (UnionInputStream u = new UnionInputStream( |
| new ByteArrayInputStream(new byte[] { 1, 2, 3 }), |
| errorReadStream)) { |
| byte buf[] = new byte[10]; |
| assertEquals(3, u.read(buf, 0, 10)); |
| assertTrue(Arrays.equals(new byte[] { 1, 2, 3 }, slice(buf, 3))); |
| try { |
| u.read(buf, 0, 1); |
| fail("Expected exception from errorReadStream"); |
| } catch (IOException e) { |
| assertEquals("Expected", e.getMessage()); |
| } |
| } |
| } |
| } |