CheckUnicode.java

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/**
 * @test
 * @bug      4114080 6565620 6959267 7070436 7198195 8032446 8072600 8221431
 * @summary  Make sure the attributes of Unicode characters, as
 * returned by the Character API, are as expected.  Do this by
 * comparing them to a baseline file together with a list of
 * known diffs.
 * @library /lib/testlibrary/java/lang
 * @build UnicodeSpec CharCheck
 * @run main CheckUnicode
 * @author Alan Liu
 * @author John O'Conner
 */

import java.io.*;

public class CheckUnicode {
    public static void main(String args[]) throws Exception {

        // 1. Check that the current 12.1 spec file is handled by the current
        // version of Character.
        File unicodeSpec = UCDFiles.UNICODE_DATA.toFile();
        for (int x = 0; x < 16; ++x) {
            int diffs = CharCheck.check(x, unicodeSpec);
            if (diffs != 0) {
                throw new RuntimeException("Unicode properties have changed " +
                                           "in an unexpected way");
            }
        }

        // 2. Check that Java identifiers are recognized correctly.
        // test a few characters that are good id starts
        char[] idStartChar = {'$', '\u20AC', 'a', 'A', 'z', 'Z', '_', '\u0E3F',
            '\u1004', '\u10A0', '\u3400', '\u4E00', '\uAC00' };
        for (int x = 0; x < idStartChar.length; x++) {
            if (Character.isJavaIdentifierStart(idStartChar[x]) != true) {
                throw new RuntimeException("Java id start characters are not recognized.");
            }
        }

        // test a few characters that are good id parts
        char[] idPartChar = {'0', '9', '\u0000', '\u0008', '\u000E', '\u007F'};
        for (int x=0; x< idStartChar.length; x++) {
            if (Character.isJavaIdentifierPart(idStartChar[x]) != true) {
                throw new RuntimeException("Java id part characters are not recognized.");
            }
        }
        for (int x=0; x<idPartChar.length; x++) {
            if (Character.isJavaIdentifierPart(idPartChar[x]) != true) {
                throw new RuntimeException("Java id part characters are not recognized.");
            }
        }

        // now do some negative checks
        for (int x=0; x< idPartChar.length; x++) {
            if (Character.isJavaIdentifierStart(idPartChar[x]) != false) {
                throw new RuntimeException("These Java id part characters" +
                    "should not be start characters.");
            }
        }
    }
}