/* * Copyright (c) 2015, 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. */ import java.util.Arrays; import org.testng.annotations.Test; import static org.testng.Assert.assertEquals; import static org.testng.Assert.assertTrue; /* * @test * @bug 8077559 * @summary Tests Compact String. This test is testing StringBuffer * behavior related to Compact String. * @run testng/othervm -XX:+CompactStrings CompactStringBuffer * @run testng/othervm -XX:-CompactStrings CompactStringBuffer */ public class CompactStringBuffer { /* * Tests for "A" */ @Test public void testCompactStringBufferForLatinA() { final String ORIGIN = "A"; /* * Because right now ASCII is the default encoding parameter for source * code in JDK build environment, so we escape them. same as below. */ check(new StringBuffer(ORIGIN).append(new char[] { '\uFF21' }), "A\uFF21"); check(new StringBuffer(ORIGIN).append(new StringBuffer("\uFF21")), "A\uFF21"); check(new StringBuffer(ORIGIN).append("\uFF21"), "A\uFF21"); check(new StringBuffer(ORIGIN).append(new StringBuffer("\uFF21")), "A\uFF21"); check(new StringBuffer(ORIGIN).delete(0, 1), ""); check(new StringBuffer(ORIGIN).delete(0, 0), "A"); check(new StringBuffer(ORIGIN).deleteCharAt(0), ""); assertEquals(new StringBuffer(ORIGIN).indexOf("A", 0), 0); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21", 0), -1); assertEquals(new StringBuffer(ORIGIN).indexOf("", 0), 0); assertEquals(new StringBuffer(ORIGIN).insert(1, "\uD801\uDC00") .indexOf("A", 0), 0); assertEquals(new StringBuffer(ORIGIN).insert(0, "\uD801\uDC00") .indexOf("A", 0), 2); check(new StringBuffer(ORIGIN).insert(0, new char[] {}), "A"); check(new StringBuffer(ORIGIN).insert(1, new char[] { '\uFF21' }), "A\uFF21"); check(new StringBuffer(ORIGIN).insert(0, new char[] { '\uFF21' }), "\uFF21A"); check(new StringBuffer(ORIGIN).insert(0, new StringBuffer("\uFF21")), "\uFF21A"); check(new StringBuffer(ORIGIN).insert(1, new StringBuffer("\uFF21")), "A\uFF21"); check(new StringBuffer(ORIGIN).insert(0, ""), "A"); check(new StringBuffer(ORIGIN).insert(0, "\uFF21"), "\uFF21A"); check(new StringBuffer(ORIGIN).insert(1, "\uFF21"), "A\uFF21"); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), -1); assertEquals(new StringBuffer(ORIGIN).lastIndexOf(""), 1); check(new StringBuffer(ORIGIN).replace(0, 0, "\uFF21"), "\uFF21A"); check(new StringBuffer(ORIGIN).replace(0, 1, "\uFF21"), "\uFF21"); checkSetCharAt(new StringBuffer(ORIGIN), 0, '\uFF21', "\uFF21"); checkSetLength(new StringBuffer(ORIGIN), 0, ""); checkSetLength(new StringBuffer(ORIGIN), 1, "A"); check(new StringBuffer(ORIGIN).substring(0), "A"); check(new StringBuffer(ORIGIN).substring(1), ""); } /* * Tests for "\uFF21" */ @Test public void testCompactStringBufferForNonLatinA() { final String ORIGIN = "\uFF21"; check(new StringBuffer(ORIGIN).append(new char[] { 'A' }), "\uFF21A"); check(new StringBuffer(ORIGIN).append(new StringBuffer("A")), "\uFF21A"); check(new StringBuffer(ORIGIN).append("A"), "\uFF21A"); check(new StringBuffer(ORIGIN).append(new StringBuffer("A")), "\uFF21A"); check(new StringBuffer(ORIGIN).delete(0, 1), ""); check(new StringBuffer(ORIGIN).delete(0, 0), "\uFF21"); check(new StringBuffer(ORIGIN).deleteCharAt(0), ""); assertEquals(new StringBuffer(ORIGIN).indexOf("A", 0), -1); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21", 0), 0); assertEquals(new StringBuffer(ORIGIN).indexOf("", 0), 0); check(new StringBuffer(ORIGIN).insert(0, new char[] {}), "\uFF21"); check(new StringBuffer(ORIGIN).insert(1, new char[] { 'A' }), "\uFF21A"); check(new StringBuffer(ORIGIN).insert(0, new char[] { 'A' }), "A\uFF21"); check(new StringBuffer(ORIGIN).insert(0, new StringBuffer("A")), "A\uFF21"); check(new StringBuffer(ORIGIN).insert(1, new StringBuffer("A")), "\uFF21A"); check(new StringBuffer(ORIGIN).insert(0, ""), "\uFF21"); check(new StringBuffer(ORIGIN).insert(0, "A"), "A\uFF21"); check(new StringBuffer(ORIGIN).insert(1, "A"), "\uFF21A"); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), -1); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), 0); assertEquals(new StringBuffer(ORIGIN).lastIndexOf(""), 1); check(new StringBuffer(ORIGIN).replace(0, 0, "A"), "A\uFF21"); check(new StringBuffer(ORIGIN).replace(0, 1, "A"), "A"); checkSetCharAt(new StringBuffer(ORIGIN), 0, 'A', "A"); checkSetLength(new StringBuffer(ORIGIN), 0, ""); checkSetLength(new StringBuffer(ORIGIN), 1, "\uFF21"); check(new StringBuffer(ORIGIN).substring(0), "\uFF21"); check(new StringBuffer(ORIGIN).substring(1), ""); } /* * Tests for "\uFF21A" */ @Test public void testCompactStringBufferForMixedA1() { final String ORIGIN = "\uFF21A"; check(new StringBuffer(ORIGIN).delete(0, 1), "A"); check(new StringBuffer(ORIGIN).delete(1, 2), "\uFF21"); check(new StringBuffer(ORIGIN).deleteCharAt(1), "\uFF21"); check(new StringBuffer(ORIGIN).deleteCharAt(0), "A"); assertEquals(new StringBuffer(ORIGIN).indexOf("A", 0), 1); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21", 0), 0); assertEquals(new StringBuffer(ORIGIN).indexOf("", 0), 0); check(new StringBuffer(ORIGIN).insert(1, new char[] { 'A' }), "\uFF21AA"); check(new StringBuffer(ORIGIN).insert(0, new char[] { '\uFF21' }), "\uFF21\uFF21A"); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), 1); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), 0); assertEquals(new StringBuffer(ORIGIN).lastIndexOf(""), 2); check(new StringBuffer(ORIGIN).replace(0, 0, "A"), "A\uFF21A"); check(new StringBuffer(ORIGIN).replace(0, 1, "A"), "AA"); checkSetCharAt(new StringBuffer(ORIGIN), 0, 'A', "AA"); checkSetLength(new StringBuffer(ORIGIN), 0, ""); checkSetLength(new StringBuffer(ORIGIN), 1, "\uFF21"); check(new StringBuffer(ORIGIN).substring(0), "\uFF21A"); check(new StringBuffer(ORIGIN).substring(1), "A"); } /* * Tests for "A\uFF21" */ @Test public void testCompactStringBufferForMixedA2() { final String ORIGIN = "A\uFF21"; check(new StringBuffer(ORIGIN).replace(1, 2, "A"), "AA"); checkSetLength(new StringBuffer(ORIGIN), 1, "A"); check(new StringBuffer(ORIGIN).substring(0), "A\uFF21"); check(new StringBuffer(ORIGIN).substring(1), "\uFF21"); check(new StringBuffer(ORIGIN).substring(0, 1), "A"); } /* * Tests for "\uFF21A\uFF21A\uFF21A\uFF21A\uFF21A" */ @Test public void testCompactStringBufferForDuplicatedMixedA1() { final String ORIGIN = "\uFF21A\uFF21A\uFF21A\uFF21A\uFF21A"; checkSetLength(new StringBuffer(ORIGIN), 1, "\uFF21"); assertEquals(new StringBuffer(ORIGIN).indexOf("A", 5), 5); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21", 5), 6); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), 9); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), 8); assertEquals(new StringBuffer(ORIGIN).lastIndexOf(""), 10); check(new StringBuffer(ORIGIN).substring(9), "A"); check(new StringBuffer(ORIGIN).substring(8), "\uFF21A"); } /* * Tests for "A\uFF21A\uFF21A\uFF21A\uFF21A\uFF21" */ @Test public void testCompactStringBufferForDuplicatedMixedA2() { final String ORIGIN = "A\uFF21A\uFF21A\uFF21A\uFF21A\uFF21"; checkSetLength(new StringBuffer(ORIGIN), 1, "A"); assertEquals(new StringBuffer(ORIGIN).indexOf("A", 5), 6); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21", 5), 5); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), 8); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), 9); check(new StringBuffer(ORIGIN).substring(9), "\uFF21"); check(new StringBuffer(ORIGIN).substring(8), "A\uFF21"); } /* * Tests for "\uD801\uDC00\uD801\uDC01" */ @Test public void testCompactStringForSupplementaryCodePoint() { final String ORIGIN = "\uD801\uDC00\uD801\uDC01"; check(new StringBuffer(ORIGIN).append("A"), "\uD801\uDC00\uD801\uDC01A"); check(new StringBuffer(ORIGIN).append("\uFF21"), "\uD801\uDC00\uD801\uDC01\uFF21"); check(new StringBuffer(ORIGIN).appendCodePoint('A'), "\uD801\uDC00\uD801\uDC01A"); check(new StringBuffer(ORIGIN).appendCodePoint('\uFF21'), "\uD801\uDC00\uD801\uDC01\uFF21"); assertEquals(new StringBuffer(ORIGIN).charAt(0), '\uD801'); assertEquals(new StringBuffer(ORIGIN).codePointAt(0), Character.codePointAt(ORIGIN, 0)); assertEquals(new StringBuffer(ORIGIN).codePointAt(1), Character.codePointAt(ORIGIN, 1)); assertEquals(new StringBuffer(ORIGIN).codePointBefore(2), Character.codePointAt(ORIGIN, 0)); assertEquals(new StringBuffer(ORIGIN).codePointCount(1, 3), 2); check(new StringBuffer(ORIGIN).delete(0, 2), "\uD801\uDC01"); check(new StringBuffer(ORIGIN).delete(0, 3), "\uDC01"); check(new StringBuffer(ORIGIN).deleteCharAt(1), "\uD801\uD801\uDC01"); checkGetChars(new StringBuffer(ORIGIN), 0, 3, new char[] { '\uD801', '\uDC00', '\uD801' }); assertEquals(new StringBuffer(ORIGIN).indexOf("\uD801\uDC01"), 2); assertEquals(new StringBuffer(ORIGIN).indexOf("\uDC01"), 3); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21"), -1); assertEquals(new StringBuffer(ORIGIN).indexOf("A"), -1); check(new StringBuffer(ORIGIN).insert(0, "\uFF21"), "\uFF21\uD801\uDC00\uD801\uDC01"); check(new StringBuffer(ORIGIN).insert(1, "\uFF21"), "\uD801\uFF21\uDC00\uD801\uDC01"); check(new StringBuffer(ORIGIN).insert(1, "A"), "\uD801A\uDC00\uD801\uDC01"); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uDC00\uD801"), 1); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uD801"), 2); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), -1); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), -1); assertEquals(new StringBuffer(ORIGIN).length(), 4); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(1, 1), 2); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(0, 1), 2); check(new StringBuffer(ORIGIN).replace(0, 2, "A"), "A\uD801\uDC01"); check(new StringBuffer(ORIGIN).replace(0, 3, "A"), "A\uDC01"); check(new StringBuffer(ORIGIN).replace(0, 2, "\uFF21"), "\uFF21\uD801\uDC01"); check(new StringBuffer(ORIGIN).replace(0, 3, "\uFF21"), "\uFF21\uDC01"); check(new StringBuffer(ORIGIN).reverse(), "\uD801\uDC01\uD801\uDC00"); checkSetCharAt(new StringBuffer(ORIGIN), 1, '\uDC01', "\uD801\uDC01\uD801\uDC01"); checkSetCharAt(new StringBuffer(ORIGIN), 1, 'A', "\uD801A\uD801\uDC01"); checkSetLength(new StringBuffer(ORIGIN), 2, "\uD801\uDC00"); checkSetLength(new StringBuffer(ORIGIN), 3, "\uD801\uDC00\uD801"); check(new StringBuffer(ORIGIN).substring(1, 3), "\uDC00\uD801"); } /* * Tests for "A\uD801\uDC00\uFF21" */ @Test public void testCompactStringForSupplementaryCodePointMixed1() { final String ORIGIN = "A\uD801\uDC00\uFF21"; assertEquals(new StringBuffer(ORIGIN).codePointBefore(3), Character.codePointAt(ORIGIN, 1)); assertEquals(new StringBuffer(ORIGIN).codePointBefore(2), '\uD801'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(1), 'A'); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 3), 2); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 4), 3); check(new StringBuffer(ORIGIN).delete(0, 1), "\uD801\uDC00\uFF21"); check(new StringBuffer(ORIGIN).delete(0, 1).delete(2, 3), "\uD801\uDC00"); check(new StringBuffer(ORIGIN).deleteCharAt(3).deleteCharAt(0), "\uD801\uDC00"); assertEquals(new StringBuffer(ORIGIN).indexOf("\uFF21"), 3); assertEquals(new StringBuffer(ORIGIN).indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("\uFF21"), 3); assertEquals(new StringBuffer(ORIGIN).lastIndexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(0, 1), 1); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(1, 1), 3); check(new StringBuffer(ORIGIN).replace(1, 3, "A"), "AA\uFF21"); check(new StringBuffer(ORIGIN).replace(1, 4, "A"), "AA"); check(new StringBuffer(ORIGIN).replace(1, 4, ""), "A"); check(new StringBuffer(ORIGIN).reverse(), "\uFF21\uD801\uDC00A"); checkSetLength(new StringBuffer(ORIGIN), 1, "A"); check(new StringBuffer(ORIGIN).substring(0, 1), "A"); } /* * Tests for "\uD801\uDC00\uFF21A" */ @Test public void testCompactStringForSupplementaryCodePointMixed2() { final String ORIGIN = "\uD801\uDC00\uFF21A"; assertEquals(new StringBuffer(ORIGIN).codePointBefore(3), Character.codePointAt(ORIGIN, 2)); assertEquals(new StringBuffer(ORIGIN).codePointBefore(2), Character.codePointAt(ORIGIN, 0)); assertEquals(new StringBuffer(ORIGIN).codePointBefore(1), '\uD801'); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 3), 2); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 4), 3); check(new StringBuffer(ORIGIN).delete(0, 2), "\uFF21A"); check(new StringBuffer(ORIGIN).delete(0, 3), "A"); check(new StringBuffer(ORIGIN).deleteCharAt(0).deleteCharAt(0) .deleteCharAt(0), "A"); assertEquals(new StringBuffer(ORIGIN).indexOf("A"), 3); assertEquals(new StringBuffer(ORIGIN).delete(0, 3).indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).replace(0, 3, "B").indexOf("A"), 1); assertEquals(new StringBuffer(ORIGIN).substring(3, 4).indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(1, 1), 2); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(0, 1), 2); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(2, 1), 3); check(new StringBuffer(ORIGIN).replace(0, 3, "B"), "BA"); check(new StringBuffer(ORIGIN).reverse(), "A\uFF21\uD801\uDC00"); } /* * Tests for "\uD801A\uDC00\uFF21" */ @Test public void testCompactStringForSupplementaryCodePointMixed3() { final String ORIGIN = "\uD801A\uDC00\uFF21"; assertEquals(new StringBuffer(ORIGIN).codePointAt(1), 'A'); assertEquals(new StringBuffer(ORIGIN).codePointAt(3), '\uFF21'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(1), '\uD801'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(2), 'A'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(3), '\uDC00'); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 3), 3); assertEquals(new StringBuffer(ORIGIN).codePointCount(1, 3), 2); assertEquals(new StringBuffer(ORIGIN).delete(0, 1).delete(1, 3) .indexOf("A"), 0); assertEquals( new StringBuffer(ORIGIN).replace(0, 1, "B").replace(2, 4, "C") .indexOf("A"), 1); assertEquals(new StringBuffer(ORIGIN).substring(1, 4).substring(0, 1) .indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(0, 1), 1); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(1, 1), 2); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(2, 1), 3); check(new StringBuffer(ORIGIN).reverse(), "\uFF21\uDC00A\uD801"); } /* * Tests for "A\uDC01\uFF21\uD801" */ @Test public void testCompactStringForSupplementaryCodePointMixed4() { final String ORIGIN = "A\uDC01\uFF21\uD801"; assertEquals(new StringBuffer(ORIGIN).codePointAt(1), '\uDC01'); assertEquals(new StringBuffer(ORIGIN).codePointAt(3), '\uD801'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(1), 'A'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(2), '\uDC01'); assertEquals(new StringBuffer(ORIGIN).codePointBefore(3), '\uFF21'); assertEquals(new StringBuffer(ORIGIN).codePointCount(0, 3), 3); assertEquals(new StringBuffer(ORIGIN).codePointCount(1, 3), 2); assertEquals(new StringBuffer(ORIGIN).delete(1, 4).indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).replace(1, 4, "B").indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).substring(0, 1).indexOf("A"), 0); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(0, 1), 1); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(1, 1), 2); assertEquals(new StringBuffer(ORIGIN).offsetByCodePoints(2, 1), 3); check(new StringBuffer(ORIGIN).reverse(), "\uD801\uFF21\uDC01A"); } @Test public void testCompactStringMisc() { String ascii = "abcdefgh"; String asciiMixed = "abc" + "\u4e00\u4e01\u4e02" + "fgh"; String bmp = "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08"; String bmpMixed = "\u4e00\u4e01\u4e02" + "ABC" + "\u4e06\u4e07\u4e08"; check(new StringBuffer().append(ascii).delete(0, 20).toString(), ""); check(new StringBuffer().append(ascii).delete(3, 20).toString(), "abc"); check(new StringBuffer().append(ascii).delete(3, 6).toString(), "abcgh"); check(new StringBuffer().append(ascii).deleteCharAt(0).toString(), "bcdefgh"); check(new StringBuffer().append(ascii).deleteCharAt(3).toString(), "abcefgh"); check(new StringBuffer().append(asciiMixed).delete(3, 6).toString(), "abcfgh"); check(new StringBuffer().append(asciiMixed).deleteCharAt(3).toString(), "abc\u4e01\u4e02fgh"); check(new StringBuffer().append(asciiMixed).deleteCharAt(3) .deleteCharAt(3) .deleteCharAt(3).toString(), "abcfgh"); check(new StringBuffer().append(bmp).delete(0, 20).toString(), ""); check(new StringBuffer().append(bmp).delete(3, 20).toString(), "\u4e00\u4e01\u4e02"); check(new StringBuffer().append(bmp).delete(3, 6).toString(), "\u4e00\u4e01\u4e02\u4e06\u4e07\u4e08"); check(new StringBuffer().append(bmp).deleteCharAt(0).toString(), "\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08"); check(new StringBuffer().append(bmp).deleteCharAt(3).toString(), "\u4e00\u4e01\u4e02\u4e04\u4e05\u4e06\u4e07\u4e08"); check(new StringBuffer().append(bmpMixed).delete(3, 6).toString(), "\u4e00\u4e01\u4e02\u4e06\u4e07\u4e08"); //////////////////////////////////////////////////////////////////// check(new StringBuffer().append(ascii).replace(3, 6, "AB").toString(), "abcABgh"); check(new StringBuffer().append(asciiMixed).replace(3, 6, "AB").toString(), "abcABfgh"); check(new StringBuffer().append(bmp).replace(3, 6, "AB").toString(), "\u4e00\u4e01\u4e02AB\u4e06\u4e07\u4e08"); check(new StringBuffer().append(bmpMixed).replace(3, 6, "").toString(), "\u4e00\u4e01\u4e02\u4e06\u4e07\u4e08"); check(new StringBuffer().append(ascii).replace(3, 6, "\u4e01\u4e02").toString(), "abc\u4e01\u4e02gh"); //////////////////////////////////////////////////////////////////// check(new StringBuffer().append(ascii).insert(3, "").toString(), "abcdefgh"); check(new StringBuffer().append(ascii).insert(3, "AB").toString(), "abcABdefgh"); check(new StringBuffer().append(ascii).insert(3, "\u4e01\u4e02").toString(), "abc\u4e01\u4e02defgh"); check(new StringBuffer().append(asciiMixed).insert(0, 'A').toString(), "Aabc\u4e00\u4e01\u4e02fgh"); check(new StringBuffer().append(asciiMixed).insert(3, "A").toString(), "abcA\u4e00\u4e01\u4e02fgh"); check(new StringBuffer().append(ascii).insert(3, 1234567).toString(), "abc1234567defgh"); check(new StringBuffer().append(bmp).insert(3, 1234567).toString(), "\u4e00\u4e01\u4e021234567\u4e03\u4e04\u4e05\u4e06\u4e07\u4e08"); //////////////////////////////////////////////////////////////////// check(new StringBuffer().append(ascii).append(1.23456).toString(), "abcdefgh1.23456"); check(new StringBuffer().append(bmp).append(1.23456).toString(), "\u4e00\u4e01\u4e02\u4e03\u4e04\u4e05\u4e06\u4e07\u4e081.23456"); //////////////////////////////////////////////////////////////////// check(new StringBuffer((CharSequence)new StringBuffer(ascii)).toString(), ascii); check(new StringBuffer((CharSequence)new StringBuffer(asciiMixed)).toString(), asciiMixed); } private void checkGetChars(StringBuffer sb, int srcBegin, int srcEnd, char expected[]) { char[] dst = new char[srcEnd - srcBegin]; sb.getChars(srcBegin, srcEnd, dst, 0); assertTrue(Arrays.equals(dst, expected)); } private void checkSetCharAt(StringBuffer sb, int index, char ch, String expected) { sb.setCharAt(index, ch); check(sb, expected); } private void checkSetLength(StringBuffer sb, int newLength, String expected) { sb.setLength(newLength); check(sb, expected); } private void check(StringBuffer sb, String expected) { check(sb.toString(), expected); } private void check(String str, String expected) { assertTrue(str.equals(expected), String.format( "Get (%s) but expect (%s), ", escapeNonASCIIs(str), escapeNonASCIIs(expected))); } /* * Escape non-ASCII characters since not all systems support them. */ private String escapeNonASCIIs(String str) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < str.length(); i++) { char c = str.charAt(i); if (c > 0x7F) { sb.append("\\u").append(Integer.toHexString((int) c)); } else { sb.append(c); } } return sb.toString(); } }