/* * Copyright (c) 2024, 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. */ import java.io.Reader; import java.io.StringReader; import java.io.IOException; import java.io.StringWriter; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.ReadOnlyBufferException; import org.testng.annotations.*; import static org.testng.Assert.*; /* * @test * @bug 8341566 * @summary Check for expected behavior of Reader.of(). * @run testng Of */ public class Of { final static String CONTENT = "Some Reader Test"; /* * Readers to be tested. */ @DataProvider public static Reader[] readers() { return new Reader[] { new StringReader(CONTENT), Reader.of(CONTENT), Reader.of(new StringBuffer(CONTENT)), Reader.of(new StringBuilder(CONTENT)), Reader.of(ByteBuffer.allocateDirect(CONTENT.length() * 2) .asCharBuffer().put(CONTENT).flip()), Reader.of(CharBuffer.wrap(CONTENT.toCharArray())), Reader.of(new CharSequence() { @Override public char charAt(int index) { return CONTENT.charAt(index); } @Override public int length() { return CONTENT.length(); } @Override public CharSequence subSequence(int start, int end) { // unused by Reader.Of's result throw new UnsupportedOperationException(); } @Override public String toString() { // Reader.Of's result SHALL NOT convert to String throw new UnsupportedOperationException(); } }) }; } @Test(dataProvider = "readers") public void testRead(Reader reader) throws IOException { String s = ""; for (int c; (c = reader.read()) != -1; s += (char) c); assertEquals(s, CONTENT, "read() returned wrong value"); } @Test(dataProvider = "readers") public void testReadBII(Reader reader) throws IOException { char[] c = new char[16]; assertEquals(reader.read(c, 8, 8), 8, "read(char[],int,int) does not respect given start or end"); assertEquals(reader.read(c, 0, 16), 8, "read(char[],int,int) does not respect end of stream"); assertEquals(new String(c), CONTENT.substring(8, 16) + CONTENT.substring(0, 8), "read(char[],int,int) provides wrong content"); } @Test(dataProvider = "readers") public void testReadBIILenZero(Reader reader) throws IOException { assertEquals(reader.read(new char[1], 0, 0), 0, "read(char[],int,int) != 0"); } @Test(dataProvider = "readers") public void testReadDirectCharBuffer(Reader reader) throws IOException { CharBuffer charBuffer = ByteBuffer.allocateDirect(32).asCharBuffer(); charBuffer.position(8); assertEquals(reader.read(charBuffer), 8, "read(CharBuffer) does not respect position or limit"); charBuffer.rewind(); assertEquals(reader.read(charBuffer), 8, "read(CharBuffer) does not respect end of stream"); charBuffer.rewind(); assertEquals(charBuffer.toString(), // last part first proofs that copy loops correctly stopped CONTENT.substring(8, 16) + CONTENT.substring(0, 8), "read(CharBuffer) provides wrong content"); } @Test(dataProvider = "readers") public void testReadNonDirectCharBuffer(Reader reader) throws IOException { CharBuffer charBuffer = CharBuffer.allocate(16); charBuffer.position(8); assertEquals(reader.read(charBuffer), 8, "read(CharBuffer) does not respect position or limit"); charBuffer.rewind(); assertEquals(reader.read(charBuffer), 8, "read(CharBuffer) does not respect end of stream"); charBuffer.rewind(); assertEquals(charBuffer.toString(), CONTENT.substring(8, 16) + CONTENT.substring(0, 8), "read(CharBuffer) provides wrong content"); } @Test(dataProvider = "readers") public void testReadCharBufferZeroRemaining(Reader reader) throws IOException { CharBuffer charBuffer = CharBuffer.allocate(0); assertEquals(reader.read(charBuffer), 0, "read(CharBuffer) != 0"); } @Test(dataProvider = "readers") public void testReady(Reader reader) throws IOException { assertTrue(reader.ready()); } @Test(dataProvider = "readers") public void testSkip(Reader reader) throws IOException { assertEquals(reader.skip(8), 8, "skip() does not respect limit"); assertEquals(reader.skip(9), 8, "skip() does not respect end of stream"); assertEquals(reader.skip(1), 0, "skip() does not respect empty stream"); } @Test(dataProvider = "readers") public void testTransferTo(Reader reader) throws IOException { StringWriter sw = new StringWriter(16); assertEquals(reader.transferTo(sw), 16, "transferTo() != 16"); assertEquals(reader.transferTo(sw), 0, "transferTo() does not respect empty stream"); assertEquals(sw.toString(), CONTENT, "transferTo() provides wrong content"); } @Test(dataProvider = "readers") public void testReadClosed(Reader reader) throws IOException { reader.close(); assertThrows(IOException.class, () -> {reader.read();}); } @Test(dataProvider = "readers") public void testReadBIIClosed(Reader reader) throws IOException { reader.close(); assertThrows(IOException.class, () -> reader.read(new char[1], 0, 1)); } @Test(dataProvider = "readers") public void testReadCharBufferClosed(Reader reader) throws IOException { CharBuffer charBuffer = CharBuffer.allocate(1); reader.close(); assertThrows(IOException.class, () -> reader.read(charBuffer)); } @Test(dataProvider = "readers") public void testReadCharBufferZeroRemainingClosed(Reader reader) throws IOException { CharBuffer charBuffer = CharBuffer.allocate(0); reader.close(); assertThrows(IOException.class, () -> reader.read(charBuffer)); } @Test(dataProvider = "readers") public void testReadyClosed(Reader reader) throws IOException { reader.close(); assertThrows(IOException.class, () -> reader.ready()); } @Test(dataProvider = "readers") public void testSkipClosed(Reader reader) throws IOException { reader.close(); assertThrows(IOException.class, () -> reader.skip(1)); } @Test(dataProvider = "readers") public void testTransferToClosed(Reader reader) throws IOException { reader.close(); assertThrows(IOException.class, () -> reader.transferTo(new StringWriter(1))); } @Test(dataProvider = "readers") public void testCloseClosed(Reader reader) throws IOException { reader.close(); reader.close(); } }