@Test
    void verifyBlankValidRegex() {
        var pattern = RegexUtils.createPattern(StringUtils.EMPTY);
        assertNotNull(pattern);
        assertSame(RegexUtils.MATCH_NOTHING_PATTERN, pattern);
        pattern = RegexUtils.createPattern("********");
        assertNotNull(pattern);
        assertSame(RegexUtils.MATCH_NOTHING_PATTERN, pattern);
    }
Tests for {@link RegexUtils}

@author David Rodriguez
@since 5.1.0
core/cas-server-core-util/src/test/java/org/apereo/cas/util/RegexUtilsTests.java