Testing Java regex with SemVer example (named capturing group)

MyRegexTest.java

import org.junit.jupiter.api.Test;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static org.junit.jupiter.api.Assertions.fail;

class MyRegexTest {

    @Test
    void testRegex() {
        String input = "1.2.3-beta.2";

        // See : https://semver.org/spec/v2.0.0.html#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
        String semverRegex = "^(?<major>0|[1-9]\\d*)\\.(?<minor>0|[1-9]\\d*)\\.(?<patch>0|[1-9]\\d*)" +
                "(?:-(?<prerelease>(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?" +
                "(?:\\+(?<buildmetadata>[0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?$";
        Pattern r = Pattern.compile(semverRegex);
        Matcher m = r.matcher(input);

        if (m.find()) {
            System.out.println("'major'          : " + m.group("major"));
            System.out.println("'minor'          : " + m.group("minor"));
            System.out.println("'patch'          : " + m.group("patch"));
            System.out.println("'prerelease'     : " + m.group("prerelease"));
            System.out.println("'buildmetadata'  : " + m.group("buildmetadata"));
        } else {
            System.out.println("NO MATCH");
            fail();
        }
    }
}