test/jdk/java/lang/String/ToLowerCase.java - openjdk/jdk25u - Git at Google


            
            /*

            
             * Copyright (c) 2003, 2022, 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 4217441 4533872 4900935 8020037 8032012 8041791 8042589 8054307

            
                @summary toLowerCase should lower-case Greek Sigma correctly depending

            
                         on the context (final/non-final).  Also it should handle

            
                         Locale specific (lt, tr, and az) lowercasings and supplementary

            
                         characters correctly.

            
            */


            import java.util.Locale;


            public class ToLowerCase {


                public static void main(String[] args) {

            
                    Locale turkish = Locale.of("tr", "TR");

            
                    Locale lt = Locale.of("lt"); // Lithanian

            
                    Locale az = Locale.of("az"); // Azeri


                    // Greek Sigma final/non-final tests

            
                    test("\u03A3", Locale.US, "\u03C3");

            
                    test("LAST\u03A3", Locale.US, "last\u03C2");

            
                    test("MID\u03A3DLE", Locale.US, "mid\u03C3dle");

            
                    test("WORD1 \u03A3 WORD3", Locale.US, "word1 \u03C3 word3");

            
                    test("WORD1 LAST\u03A3 WORD3", Locale.US, "word1 last\u03C2 word3");

            
                    test("WORD1 MID\u03A3DLE WORD3", Locale.US, "word1 mid\u03C3dle word3");

            
                    test("\u0399\u0395\u03a3\u03a5\u03a3 \u03a7\u03a1\u0399\u03a3\u03a4\u039f\u03a3", Locale.US,

            
                         "\u03b9\u03b5\u03c3\u03c5\u03c2 \u03c7\u03c1\u03b9\u03c3\u03c4\u03bf\u03c2"); // "IESUS XRISTOS"


                    // Explicit dot above for I's and J's whenever there are more accents above (Lithanian)

            
                    test("I", lt, "i");

            
                    test("I\u0300", lt, "i\u0307\u0300"); // "I" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("I\u0316", lt, "i\u0316"); // "I" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)

            
                    test("J", lt, "j");

            
                    test("J\u0300", lt, "j\u0307\u0300"); // "J" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("J\u0316", lt, "j\u0316"); // "J" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)

            
                    test("\u012E", lt, "\u012F");

            
                    test("\u012E\u0300", lt, "\u012F\u0307\u0300"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("\u012E\u0316", lt, "\u012F\u0316"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)

            
                    test("\u00CC", lt, "i\u0307\u0300");

            
                    test("\u00CD", lt, "i\u0307\u0301");

            
                    test("\u0128", lt, "i\u0307\u0303");

            
                    test("I\u0300", Locale.US, "i\u0300"); // "I" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("J\u0300", Locale.US, "j\u0300"); // "J" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("\u012E\u0300", Locale.US, "\u012F\u0300"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT (cc==230)

            
                    test("\u00CC", Locale.US, "\u00EC");

            
                    test("\u00CD", Locale.US, "\u00ED");

            
                    test("\u0128", Locale.US, "\u0129");


                    // I-dot tests

            
                    test("\u0130", turkish, "i");

            
                    test("\u0130", az, "i");

            
                    test("\u0130", lt, "\u0069\u0307");

            
                    test("\u0130", Locale.US, "\u0069\u0307");

            
                    test("\u0130", Locale.JAPAN, "\u0069\u0307");

            
                    test("\u0130", Locale.ROOT, "\u0069\u0307");


                    // Remove dot_above in the sequence I + dot_above (Turkish and Azeri)

            
                    test("I\u0307", turkish, "i");

            
                    test("I\u0307", az, "i");

            
                    test("J\u0307", turkish, "j\u0307");

            
                    test("J\u0307", az, "j\u0307");


                    // Unless an I is before a dot_above, it turns into a dotless i (Turkish and Azeri)

            
                    test("I", turkish, "\u0131");

            
                    test("I", az, "\u0131");

            
                    test("I", Locale.US, "i");

            
                    test("IABC", turkish, "\u0131abc");

            
                    test("IABC", az, "\u0131abc");

            
                    test("IABC", Locale.US, "iabc");


                    // Supplementary character tests

            
                    //

            
                    // U+10400 ("\uD801\uDC00"): DESERET CAPITAL LETTER LONG I

            
                    // U+10401 ("\uD801\uDC01"): DESERET CAPITAL LETTER LONG E

            
                    // U+10402 ("\uD801\uDC02"): DESERET CAPITAL LETTER LONG A

            
                    // U+10428 ("\uD801\uDC28"): DESERET SMALL LETTER LONG I

            
                    // U+10429 ("\uD801\uDC29"): DESERET SMALL LETTER LONG E

            
                    // U+1042A ("\uD801\uDC2A"): DESERET SMALL LETTER LONG A

            
                    //

            
                    // valid code point tests:

            
                    test("\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "\uD801\uDC28\uD801\uDC29\uD801\uDC2A");

            
                    test("\uD801\uDC00A\uD801\uDC01B\uD801\uDC02C", Locale.US, "\uD801\uDC28a\uD801\uDC29b\uD801\uDC2Ac");

            
                    // invalid code point tests:

            
                    test("\uD800\uD800\uD801A\uDC00\uDC00\uDC00B", Locale.US, "\uD800\uD800\uD801a\uDC00\uDC00\uDC00b");


                    // lower/uppercase + surrogates

            
                    test("a\uD801\uDC1c", Locale.ROOT, "a\uD801\uDC44");

            
                    test("A\uD801\uDC1c", Locale.ROOT, "a\uD801\uDC44");

            
                    test("a\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "a\uD801\uDC28\uD801\uDC29\uD801\uDC2A");

            
                    test("A\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "a\uD801\uDC28\uD801\uDC29\uD801\uDC2A");


                    // test bmp + supp1

            
                    StringBuilder src = new StringBuilder(0x20000);

            
                    StringBuilder exp = new StringBuilder(0x20000);

            
                    for (int cp = 0; cp < 0x20000; cp++) {

            
                        if (cp >= Character.MIN_HIGH_SURROGATE && cp <= Character.MAX_HIGH_SURROGATE) {

            
                            continue;

            
                        }

            
                        if (cp == 0x0130) {

            
                            // Although UnicodeData.txt has the lower case char as \u0069, it should be

            
                            // handled with the rules in SpecialCasing.txt, i.e., \u0069\u0307 in

            
                            // non Turkic locales.

            
                            continue;

            
                        }

            
                        int lowerCase = Character.toLowerCase(cp);

            
                        if (lowerCase == -1) {    //Character.ERROR

            
                            continue;

            
                        }

            
                        src.appendCodePoint(cp);

            
                        exp.appendCodePoint(lowerCase);

            
                    }

            
                    test(src.toString(), Locale.US, exp.toString());


                    // test latin1

            
                    src = new StringBuilder(0x100);

            
                    exp = new StringBuilder(0x100);

            
                    for (int cp = 0; cp < 0x100; cp++) {

            
                        int lowerCase = Character.toLowerCase(cp);

            
                        if (lowerCase == -1) {    //Character.ERROR

            
                            continue;

            
                        }

            
                        src.appendCodePoint(cp);

            
                        exp.appendCodePoint(lowerCase);

            
                    }

            
                    test(src.toString(), Locale.US, exp.toString());


                    // test non-latin1 -> latin1

            
                    src = new StringBuilder(0x100).append("abc");

            
                    exp = new StringBuilder(0x100).append("abc");

            
                    for (int cp = 0x100; cp < 0x10000; cp++) {

            
                        int lowerCase  = Character.toLowerCase(cp);

            
                        if (lowerCase < 0x100 && cp != '\u0130') {

            
                            src.appendCodePoint(cp);

            
                            exp.appendCodePoint(lowerCase);

            
                        }

            
                    }

            
                    test(src.toString(), Locale.US, exp.toString());

            
                }


                static void test(String in, Locale locale, String expected) {

            
                    test0(in, locale,expected);

            
                    for (String[] ss :  new String[][] {

            
                                            new String[] {"abc",      "abc"},

            
                                            new String[] {"aBc",      "abc"},

            
                                            new String[] {"ABC",      "abc"},

            
                                            new String[] {"ab\u4e00", "ab\u4e00"},

            
                                            new String[] {"aB\u4e00", "ab\u4e00"},

            
                                            new String[] {"AB\u4e00", "ab\u4e00"},

            
                                            new String[] {"ab\uD800\uDC00", "ab\uD800\uDC00"},

            
                                            new String[] {"aB\uD800\uDC00", "ab\uD800\uDC00"},

            
                                            new String[] {"AB\uD800\uDC00", "ab\uD800\uDC00"},

            
                                            new String[] {"ab\uD801\uDC1C", "ab\uD801\uDC44"},

            
                                            new String[] {"aB\uD801\uDC1C", "ab\uD801\uDC44"},

            
                                            new String[] {"AB\uD801\uDC1C", "ab\uD801\uDC44"},


                                        }) {

            
                        test0(ss[0] + " " + in, locale, ss[1] + " " + expected);

            
                        test0(in + " " + ss[0], locale, expected + " " + ss[1]);

            
                    }

            
                }


                static void test0(String in, Locale locale, String expected) {

            
                    String result = in.toLowerCase(locale);

            
                    if (!result.equals(expected)) {

            
                        System.err.println("input: " + in + ", locale: " + locale +

            
                                ", expected: " + expected + ", actual: " + result);

            
                        throw new RuntimeException();

            
                    }

            
                }

            
            }
	/*
	* Copyright (c) 2003, 2022, 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 4217441 4533872 4900935 8020037 8032012 8041791 8042589 8054307
	@summary toLowerCase should lower-case Greek Sigma correctly depending
	on the context (final/non-final). Also it should handle
	Locale specific (lt, tr, and az) lowercasings and supplementary
	characters correctly.
	*/

	import java.util.Locale;

	public class ToLowerCase {

	public static void main(String[] args) {
	Locale turkish = Locale.of("tr", "TR");
	Locale lt = Locale.of("lt"); // Lithanian
	Locale az = Locale.of("az"); // Azeri

	// Greek Sigma final/non-final tests
	test("\u03A3", Locale.US, "\u03C3");
	test("LAST\u03A3", Locale.US, "last\u03C2");
	test("MID\u03A3DLE", Locale.US, "mid\u03C3dle");
	test("WORD1 \u03A3 WORD3", Locale.US, "word1 \u03C3 word3");
	test("WORD1 LAST\u03A3 WORD3", Locale.US, "word1 last\u03C2 word3");
	test("WORD1 MID\u03A3DLE WORD3", Locale.US, "word1 mid\u03C3dle word3");
	test("\u0399\u0395\u03a3\u03a5\u03a3 \u03a7\u03a1\u0399\u03a3\u03a4\u039f\u03a3", Locale.US,
	"\u03b9\u03b5\u03c3\u03c5\u03c2 \u03c7\u03c1\u03b9\u03c3\u03c4\u03bf\u03c2"); // "IESUS XRISTOS"

	// Explicit dot above for I's and J's whenever there are more accents above (Lithanian)
	test("I", lt, "i");
	test("I\u0300", lt, "i\u0307\u0300"); // "I" followed by COMBINING GRAVE ACCENT (cc==230)
	test("I\u0316", lt, "i\u0316"); // "I" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)
	test("J", lt, "j");
	test("J\u0300", lt, "j\u0307\u0300"); // "J" followed by COMBINING GRAVE ACCENT (cc==230)
	test("J\u0316", lt, "j\u0316"); // "J" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)
	test("\u012E", lt, "\u012F");
	test("\u012E\u0300", lt, "\u012F\u0307\u0300"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT (cc==230)
	test("\u012E\u0316", lt, "\u012F\u0316"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT BELOW (cc!=230)
	test("\u00CC", lt, "i\u0307\u0300");
	test("\u00CD", lt, "i\u0307\u0301");
	test("\u0128", lt, "i\u0307\u0303");
	test("I\u0300", Locale.US, "i\u0300"); // "I" followed by COMBINING GRAVE ACCENT (cc==230)
	test("J\u0300", Locale.US, "j\u0300"); // "J" followed by COMBINING GRAVE ACCENT (cc==230)
	test("\u012E\u0300", Locale.US, "\u012F\u0300"); // "I (w/ OGONEK)" followed by COMBINING GRAVE ACCENT (cc==230)
	test("\u00CC", Locale.US, "\u00EC");
	test("\u00CD", Locale.US, "\u00ED");
	test("\u0128", Locale.US, "\u0129");

	// I-dot tests
	test("\u0130", turkish, "i");
	test("\u0130", az, "i");
	test("\u0130", lt, "\u0069\u0307");
	test("\u0130", Locale.US, "\u0069\u0307");
	test("\u0130", Locale.JAPAN, "\u0069\u0307");
	test("\u0130", Locale.ROOT, "\u0069\u0307");

	// Remove dot_above in the sequence I + dot_above (Turkish and Azeri)
	test("I\u0307", turkish, "i");
	test("I\u0307", az, "i");
	test("J\u0307", turkish, "j\u0307");
	test("J\u0307", az, "j\u0307");

	// Unless an I is before a dot_above, it turns into a dotless i (Turkish and Azeri)
	test("I", turkish, "\u0131");
	test("I", az, "\u0131");
	test("I", Locale.US, "i");
	test("IABC", turkish, "\u0131abc");
	test("IABC", az, "\u0131abc");
	test("IABC", Locale.US, "iabc");

	// Supplementary character tests
	//
	// U+10400 ("\uD801\uDC00"): DESERET CAPITAL LETTER LONG I
	// U+10401 ("\uD801\uDC01"): DESERET CAPITAL LETTER LONG E
	// U+10402 ("\uD801\uDC02"): DESERET CAPITAL LETTER LONG A
	// U+10428 ("\uD801\uDC28"): DESERET SMALL LETTER LONG I
	// U+10429 ("\uD801\uDC29"): DESERET SMALL LETTER LONG E
	// U+1042A ("\uD801\uDC2A"): DESERET SMALL LETTER LONG A
	//
	// valid code point tests:
	test("\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "\uD801\uDC28\uD801\uDC29\uD801\uDC2A");
	test("\uD801\uDC00A\uD801\uDC01B\uD801\uDC02C", Locale.US, "\uD801\uDC28a\uD801\uDC29b\uD801\uDC2Ac");
	// invalid code point tests:
	test("\uD800\uD800\uD801A\uDC00\uDC00\uDC00B", Locale.US, "\uD800\uD800\uD801a\uDC00\uDC00\uDC00b");

	// lower/uppercase + surrogates
	test("a\uD801\uDC1c", Locale.ROOT, "a\uD801\uDC44");
	test("A\uD801\uDC1c", Locale.ROOT, "a\uD801\uDC44");
	test("a\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "a\uD801\uDC28\uD801\uDC29\uD801\uDC2A");
	test("A\uD801\uDC00\uD801\uDC01\uD801\uDC02", Locale.US, "a\uD801\uDC28\uD801\uDC29\uD801\uDC2A");

	// test bmp + supp1
	StringBuilder src = new StringBuilder(0x20000);
	StringBuilder exp = new StringBuilder(0x20000);
	for (int cp = 0; cp < 0x20000; cp++) {
	if (cp >= Character.MIN_HIGH_SURROGATE && cp <= Character.MAX_HIGH_SURROGATE) {
	continue;
	}
	if (cp == 0x0130) {
	// Although UnicodeData.txt has the lower case char as \u0069, it should be
	// handled with the rules in SpecialCasing.txt, i.e., \u0069\u0307 in
	// non Turkic locales.
	continue;
	}
	int lowerCase = Character.toLowerCase(cp);
	if (lowerCase == -1) { //Character.ERROR
	continue;
	}
	src.appendCodePoint(cp);
	exp.appendCodePoint(lowerCase);
	}
	test(src.toString(), Locale.US, exp.toString());

	// test latin1
	src = new StringBuilder(0x100);
	exp = new StringBuilder(0x100);
	for (int cp = 0; cp < 0x100; cp++) {
	int lowerCase = Character.toLowerCase(cp);
	if (lowerCase == -1) { //Character.ERROR
	continue;
	}
	src.appendCodePoint(cp);
	exp.appendCodePoint(lowerCase);
	}
	test(src.toString(), Locale.US, exp.toString());

	// test non-latin1 -> latin1
	src = new StringBuilder(0x100).append("abc");
	exp = new StringBuilder(0x100).append("abc");
	for (int cp = 0x100; cp < 0x10000; cp++) {
	int lowerCase = Character.toLowerCase(cp);
	if (lowerCase < 0x100 && cp != '\u0130') {
	src.appendCodePoint(cp);
	exp.appendCodePoint(lowerCase);
	}
	}
	test(src.toString(), Locale.US, exp.toString());
	}

	static void test(String in, Locale locale, String expected) {
	test0(in, locale,expected);
	for (String[] ss : new String[][] {
	new String[] {"abc", "abc"},
	new String[] {"aBc", "abc"},
	new String[] {"ABC", "abc"},
	new String[] {"ab\u4e00", "ab\u4e00"},
	new String[] {"aB\u4e00", "ab\u4e00"},
	new String[] {"AB\u4e00", "ab\u4e00"},
	new String[] {"ab\uD800\uDC00", "ab\uD800\uDC00"},
	new String[] {"aB\uD800\uDC00", "ab\uD800\uDC00"},
	new String[] {"AB\uD800\uDC00", "ab\uD800\uDC00"},
	new String[] {"ab\uD801\uDC1C", "ab\uD801\uDC44"},
	new String[] {"aB\uD801\uDC1C", "ab\uD801\uDC44"},
	new String[] {"AB\uD801\uDC1C", "ab\uD801\uDC44"},

	}) {
	test0(ss[0] + " " + in, locale, ss[1] + " " + expected);
	test0(in + " " + ss[0], locale, expected + " " + ss[1]);
	}
	}

	static void test0(String in, Locale locale, String expected) {
	String result = in.toLowerCase(locale);
	if (!result.equals(expected)) {
	System.err.println("input: " + in + ", locale: " + locale +
	", expected: " + expected + ", actual: " + result);
	throw new RuntimeException();
	}
	}
	}