assertThat(matcher, matchesFile("a", "b", "c"));
        assertThat(matcher, not(matchesFile("a")));
        assertThat(matcher, not(matchesFile("a", "c")));
        assertThat(matcher, not(matchesFile("c", "b")));

        matcher = PatternMatcherFactory.getPatternMatcher(true, true, "a\\b\\");
        assertThat(matcher, matchesFile("a", "b"));
        assertThat(matcher, matchesFile("a", "b", "c"));

}

var configLock sync.RWMutex

// Enabled - indicates if cache is enabled or not
func (c *Config) Enabled() bool {
	return c.Enable && c.Endpoint != ""
}

// MatchesSize verifies if input 'size' falls under cacheable threshold
func (c Config) MatchesSize(size int64) bool {
	configLock.RLock()
	defer configLock.RUnlock()

	return c.Enable && c.BlockSize > 0 && size <= c.BlockSize
}

// Update updates new cache frequency

	if opts.PartNumber > 0 && len(objInfo.Parts) > 0 {
		setPartsCountHeaders(w, objInfo)
	}

	setHeadGetRespHeaders(w, r.Form)

	var buf *bytebufferpool.ByteBuffer
	if update && globalCacheConfig.MatchesSize(objInfo.Size) {
		buf = bytebufferpool.Get()
		defer bytebufferpool.Put(buf)
	}

	var iw io.Writer
	iw = w
	if buf != nil {
		iw = io.MultiWriter(w, buf)
	}

	statusCodeWritten := false