test/jdk/java/lang/String/CompactString/EqualsIgnoreCase.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;

/*
 * @test
 * @bug 8077559 8248655 8302871
 * @summary Tests Compact String. This one is for String.equalsIgnoreCase.
 * @run testng/othervm -XX:+CompactStrings EqualsIgnoreCase
 * @run testng/othervm -XX:-CompactStrings EqualsIgnoreCase
 */

public class EqualsIgnoreCase extends CompactString {

    @DataProvider
    public Object[][] provider() {
        return new Object[][] {

        new Object[] { STRING_EMPTY, "", true },
                new Object[] { STRING_L1, "a", true },
                new Object[] { STRING_L2, "aB", true },
                new Object[] { STRING_L4, "AbCd", true },
                new Object[] { STRING_LLONG, "aBcDeFgH", true },
                new Object[] { STRING_U1, "\uFF41", true },
                new Object[] { STRING_U1, "\uFF21", true },
                new Object[] { STRING_U2, "\uFF41\uFF42", true },
                new Object[] { STRING_U2, "\uFF41\uFF22", true },
                new Object[] { STRING_U2, "\uFF21\uFF42", true },
                new Object[] { STRING_M12, "\uFF41a", true },
                new Object[] { STRING_M12, "\uFF21A", true },
                new Object[] { STRING_M11, "a\uFF41", true },
                new Object[] { STRING_M11, "A\uFF21", true },
                new Object[] { STRING_SUPPLEMENTARY, STRING_SUPPLEMENTARY_LOWERCASE, true },

        };
    }

    @Test(dataProvider = "provider")
    public void testEqualsIgnoreCase(String str, String anotherString,
            boolean expected) {
        map.get(str)
                .forEach(
                        (source, data) -> {
                            assertEquals(
                                    data.equalsIgnoreCase(anotherString),
                                    expected,
                                    String.format(
                                            "testing String(%s).equalsIgnoreCase(%s), source : %s, ",
                                            escapeNonASCIIs(data),
                                            escapeNonASCIIs(anotherString),
                                            source));
                        });
    }

    /**
     * Exhaustively check that all 256x256 latin1 code point pairs are equalsIgnoreCased
     * in a manner consistent with Character.toLowerCase(Character.toUpperCase(c));
     */
    @Test
    public void checkConsistencyWithCharacterUppercaseLowerCase() {
        for (char a = 0; a < 256; a++) {
            for (char b = 0; b < 256; b++) {

                int caseFoldA = Character.toLowerCase(Character.toUpperCase(a));
                int caseFoldB = Character.toLowerCase(Character.toUpperCase(b));

                String astr = Character.toString(a);
                String bstr = Character.toString(b);

                // If characters fold to the same lowercase, their strings should equalsIgnoreCase:
                if (caseFoldA == caseFoldB) {
                    assertTrue(astr.equalsIgnoreCase(bstr),
                            "Expected %s to equalsIgnoreCase %s".formatted(astr, bstr));
                } else {
                    assertFalse(astr.equalsIgnoreCase(bstr),
                            "Expected %s to not equalsIgnoreCase %s".formatted(astr, bstr));
                }
            }
        }
    }
}