StringUtilsTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/**
 * @test
 * @bug 8029800 8043186
 * @summary Unit test StringUtils
 * @modules jdk.compiler/com.sun.tools.javac.util
 * @run main StringUtilsTest
 */

import java.util.Locale;
import java.util.Objects;
import com.sun.tools.javac.util.StringUtils;

public class StringUtilsTest {
    public static void main(String... args) throws Exception {
        new StringUtilsTest().run();
    }

    void run() throws Exception {
        Locale.setDefault(new Locale("tr", "TR"));

        //verify the properties of the default locale:
        assertEquals("\u0131", "I".toLowerCase());
        assertEquals("\u0130", "i".toUpperCase());

        //verify the StringUtils.toLowerCase/toUpperCase do what they should:
        assertEquals("i", StringUtils.toLowerCase("I"));
        assertEquals("I", StringUtils.toUpperCase("i"));

        //verify StringUtils.caseInsensitiveIndexOf works:
        assertEquals(2, StringUtils.indexOfIgnoreCase("  lookFor", "lookfor"));
        assertEquals(11, StringUtils.indexOfIgnoreCase("  lookFor  LOOKfor", "lookfor", 11));
        assertEquals(2, StringUtils.indexOfIgnoreCase("\u0130\u0130lookFor", "lookfor"));
    }

    void assertEquals(String expected, String actual) {
        if (!Objects.equals(expected, actual)) {
            throw new IllegalStateException("expected=" + expected + "; actual=" + actual);
        }
    }

    void assertEquals(int expected, int actual) {
        if (expected != actual) {
            throw new IllegalStateException("expected=" + expected + "; actual=" + actual);
        }
    }
}