--- /dev/null 2019-07-12 12:52:25.000000000 -0700 +++ new/test/jdk/java/io/PrintStream/Write.java 2019-07-12 12:52:24.000000000 -0700 @@ -0,0 +1,81 @@ +/* + * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test + * @bug 8187898 + * @summary Test of write(byte[]) + */ + +import java.io.BufferedOutputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.io.PrintStream; +import java.util.Arrays; + +// Need to verify that: +// . bytes are not flushed if auto-flush is not selected +// . bytes are flushed if auto-flush is selected +// . the bytes written are correct +// . the error condition occurs if an internal IOException is thrown +public class Write { + public static void main(String[] args) throws Exception { + ByteArrayOutputStream baos = new ByteArrayOutputStream(); + OutputStream out = new BufferedOutputStream(baos, 512); + PrintStream ps = new PrintStream(out, false); + + byte[] buf = new byte[128]; + for (int i = 0; i < buf.length; i++) { + buf[i] = (byte)i; + } + + ps.write(buf); + assertTrue(baos.size() == 0, "Buffer should not have been flushed"); + ps.close(); + assertTrue(baos.size() == buf.length, "Stream size " + baos.size() + + " but expected " + buf.length); + + ps = new PrintStream(out, true); + ps.write(buf); + assertTrue(baos.size() == 2*buf.length, "Stream size " + baos.size() + + " but expected " + 2*buf.length); + + byte[] arr = baos.toByteArray(); + assertTrue(arr.length == 2*buf.length, "Array length " + arr.length + + " but expected " + 2*buf.length); + assertTrue(Arrays.equals(buf, 0, buf.length, arr, 0, buf.length), + "First write not equal"); + assertTrue(Arrays.equals(buf, 0, buf.length, arr, buf.length, + 2*buf.length), "Second write not equal"); + + ps.close(); + ps.write(buf); + assertTrue(ps.checkError(), "Error condition should be true"); + } + + private static void assertTrue(boolean condition, String msg) { + if (!condition) + throw new RuntimeException(msg); + } +}