--- /dev/null 2015-10-12 14:28:10.000000000 -0700 +++ new/test/java/lang/String/EqualsIgnoreCase.java 2015-10-12 14:28:09.000000000 -0700 @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2015, 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 8138824 + * @summary Test expected equalsIgnoreCase behavior for some known asymmetric case mappings + */ + +public class EqualsIgnoreCase { + private static final String SMALL_I = "i"; + private static final String CAPITAL_I = "I"; + // Characters that do not map symetrically between upper/lower case + private static final String SMALL_DOTLESS_I = "\u0131"; + private static final String CAPITAL_I_WITH_DOT = "\u0130"; + private static final String LOWER_GREEK_THETA = "\u03D1"; + private static final String CAPITAL_GREEK_THETA = "\u03F4"; + + public static void main(String[] args) { + compareFuncs(SMALL_I, CAPITAL_I, true, true); + compareFuncs(CAPITAL_I_WITH_DOT, SMALL_DOTLESS_I, true, false); + compareFuncs(LOWER_GREEK_THETA, CAPITAL_GREEK_THETA, true, false); + } + + /** + * Compare the actual results of equalsIgnoreCase(): + * toUpperCase(toLowerCase(eachChar)) + * to the behavior described in the equalsIgnoreCase() spec prior to 8138824: + * toUpperCase(eachChar) + * toLowerCase(eachChar) + * + * @param s1 A string + * @param s2 Another string + * @param expectEquals Expected result of equalsIgnoreCase() + * @param expectTuTl Expected result of toUpperToLowerOriginals() + */ + private static void compareFuncs(String s1, String s2, boolean expectEquals, boolean expectTuTl) { + System.out.println(s1 + ", " + s2); + boolean equalsResult = s1.equalsIgnoreCase(s2); + System.out.println("equalsIgnoreCase:" + equalsResult); + + boolean tuTlResult = toUpperToLowerOriginals(s1, s2); + System.out.println("tUtLO:" + tuTlResult); + boolean failed = false; + + if (equalsResult != expectEquals) { + System.out.println("Expected " + expectEquals + " from equalsIgnoreCase() but got " + equalsResult); + failed = true; + } + if (tuTlResult != expectTuTl) { + System.out.println("Expected " + expectTuTl + " from toUpperToLowerOriginals() but got " + tuTlResult); + failed = true; + } + if (failed) { throw new RuntimeException("Test Failed"); } + } + + /** + * Apply toUpperCase() and toLowerCase() to corresponding chars of both + * Strings. Returns true if each pair of corresponsing chars are either: + * 1. == after both are converted to upper case + * or + * 2. == after both are converted to lower case + */ + private static boolean toUpperToLowerOriginals(String str1, String str2) { + for (int i = 0; i < str1.length(); i++) { + char c1 = str1.charAt(i); + char c2 = str2.charAt(i); + + char uc1 = Character.toUpperCase(c1); + char uc2 = Character.toUpperCase(c2); + boolean upperMatch = uc1 == uc2; + + char lc1 = Character.toLowerCase(c1); + char lc2 = Character.toLowerCase(c2); + boolean lowerMatch = lc1 == lc2; + + if (!(upperMatch || lowerMatch)) { + return false; + } + } + return true; + } +}