312 lines
7.4 KiB
Java
312 lines
7.4 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8013395 8014814
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* @summary Test StringBuffer.toString caching
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*/
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public class ToStringCache {
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// we can't test that we actually use a cached value (the benchmarks
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// verify that) but we have to test that the cache is cleared when
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// expected
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public static void main(String[] args) throws Exception {
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String original = "The original String";
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StringBuffer sb = new StringBuffer(original);
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String a = sb.toString();
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checkEqual(a, original);
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String b = sb.toString();
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checkEqual(a, b);
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// mutating methods
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sb.setLength(12);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.setCharAt(0, 'X');
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(new Character('X'));
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append("More text");
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(sb);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(new StringBuilder("Build"));
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(new StringBuilder("Build2"), 0, 1);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(new char[] { 'a', 'b' });
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(true);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append('c');
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(23);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.appendCodePoint(Character.codePointAt(new char[] { 'X'}, 0));
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(1L);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(1.0f);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append(1.0d);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.delete(0, 5);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.deleteCharAt(0);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.replace(0,2, "123");
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, new char[] { 'a', 'b', 'c'}, 0, 3);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, new Object());
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, "abc");
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, new char[] { 'a', 'b', 'c' });
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, new StringBuilder("Build"));
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, new StringBuilder("Build"), 0, 1);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, false);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, 'X');
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, 1);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, 1L);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, 1.0f);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.insert(0, 1.0d);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.reverse();
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b = sb.toString();
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checkUnequal(a, b);
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// Extra checks that append(null) works correctly
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sb.append((String)null);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append((StringBuffer)null);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append((StringBuilder)null);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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sb.append((CharSequence)null);
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b = sb.toString();
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checkUnequal(a, b);
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a = b;
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// non-mutating methods
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// Reset to known value
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sb = new StringBuffer(original);
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a = sb.toString();
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b = sb.toString();
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checkEqual(a, b);
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int l = sb.length();
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b = sb.toString();
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checkEqual(a, b);
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int cap = sb.capacity();
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b = sb.toString();
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checkEqual(a, b);
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sb.ensureCapacity(100);
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b = sb.toString();
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checkEqual(a, b);
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sb.trimToSize();
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b = sb.toString();
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checkEqual(a, b);
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char c = sb.charAt(1);
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b = sb.toString();
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checkEqual(a, b);
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int cp = sb.codePointAt(1);
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b = sb.toString();
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checkEqual(a, b);
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cp = sb.codePointBefore(2);
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b = sb.toString();
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checkEqual(a, b);
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int count = sb.codePointCount(0,1);
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b = sb.toString();
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checkEqual(a, b);
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count = sb.offsetByCodePoints(0, 1);
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b = sb.toString();
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checkEqual(a, b);
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sb.getChars(0, 1, new char[2], 0);
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b = sb.toString();
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checkEqual(a, b);
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String sub = sb.substring(0);
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b = sb.toString();
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checkEqual(a, b);
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CharSequence cs = sb.subSequence(0,1);
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b = sb.toString();
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checkEqual(a, b);
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sub = sb.substring(0, 3);
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b = sb.toString();
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checkEqual(a, b);
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int index = sb.indexOf("rig");
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b = sb.toString();
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checkEqual(a, b);
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index = sb.indexOf("rig", 2);
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b = sb.toString();
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checkEqual(a, b);
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index = sb.lastIndexOf("rig");
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b = sb.toString();
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checkEqual(a, b);
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index = sb.lastIndexOf("rig", 3);
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b = sb.toString();
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checkEqual(a, b);
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}
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private static void checkEqual(String s1, String s2) {
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if (!s1.equals(s2))
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throw new RuntimeException("Unmatched strings: s1 = "
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+ s1 + " s2 = " + s2);
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}
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private static void checkUnequal(String s1, String s2) {
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if (s1.equals(s2))
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throw new RuntimeException("Unexpected matched strings: " + s1);
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}
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}
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