105 lines
4.1 KiB
Java
105 lines
4.1 KiB
Java
/*
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* Copyright (c) 2015, 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 8138824
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* @summary Test expected equalsIgnoreCase behavior for some known asymmetric case mappings
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*/
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public class EqualsIgnoreCase {
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private static final String SMALL_I = "i";
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private static final String CAPITAL_I = "I";
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// Characters that do not map symmetrically between upper/lower case
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private static final String SMALL_DOTLESS_I = "\u0131";
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private static final String CAPITAL_I_WITH_DOT = "\u0130";
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private static final String LOWER_GREEK_THETA = "\u03D1";
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private static final String CAPITAL_GREEK_THETA = "\u03F4";
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public static void main(String[] args) {
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compareFuncs(SMALL_I, CAPITAL_I, true, true);
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compareFuncs(CAPITAL_I_WITH_DOT, SMALL_DOTLESS_I, true, false);
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compareFuncs(LOWER_GREEK_THETA, CAPITAL_GREEK_THETA, true, false);
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}
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/**
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* Compare the actual results of equalsIgnoreCase():
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* toUpperCase(toLowerCase(eachChar))
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* to the behavior described in the equalsIgnoreCase() spec prior to 8138824:
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* toUpperCase(eachChar)
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* toLowerCase(eachChar)
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*
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* @param s1 A string
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* @param s2 Another string
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* @param expectEquals Expected result of equalsIgnoreCase()
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* @param expectTuTl Expected result of toUpperToLowerOriginals()
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*/
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private static void compareFuncs(String s1, String s2, boolean expectEquals, boolean expectTuTl) {
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System.out.println(s1 + ", " + s2);
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boolean equalsResult = s1.equalsIgnoreCase(s2);
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System.out.println("equalsIgnoreCase:" + equalsResult);
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boolean tuTlResult = toUpperToLowerOriginals(s1, s2);
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System.out.println("tUtLO:" + tuTlResult);
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boolean failed = false;
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if (equalsResult != expectEquals) {
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System.out.println("Expected " + expectEquals + " from equalsIgnoreCase() but got " + equalsResult);
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failed = true;
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}
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if (tuTlResult != expectTuTl) {
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System.out.println("Expected " + expectTuTl + " from toUpperToLowerOriginals() but got " + tuTlResult);
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failed = true;
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}
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if (failed) { throw new RuntimeException("Test Failed"); }
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}
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/**
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* Apply toUpperCase() and toLowerCase() to corresponding chars of both
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* Strings. Returns true if each pair of corresponding chars are either:
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* 1. == after both are converted to upper case
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* or
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* 2. == after both are converted to lower case
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* and the String lengths are equal.
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*/
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private static boolean toUpperToLowerOriginals(String str1, String str2) {
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if (str1.length() != str2.length()) { return false; }
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for (int i = 0; i < str1.length(); i++) {
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char c1 = str1.charAt(i);
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char c2 = str2.charAt(i);
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char uc1 = Character.toUpperCase(c1);
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char uc2 = Character.toUpperCase(c2);
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boolean upperMatch = uc1 == uc2;
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char lc1 = Character.toLowerCase(c1);
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char lc2 = Character.toLowerCase(c2);
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boolean lowerMatch = lc1 == lc2;
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if (!(upperMatch || lowerMatch)) {
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return false;
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}
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}
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return true;
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}
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}
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