/**
     * Sets the cache control and expires header to the HttpServletResponse
     */
    fun HttpServletResponse.expiresIn(seconds: Int) {
        setHeader("Cache-Control", "public, max-age=$seconds")
        setHeader("Expires", (System.currentTimeMillis() + seconds * 1000).toString())
    }
    
    @Test
    fun testExtension_expiresIn() {
        val response = Mockito.mock(HttpServletResponse::class.java)
        response.expiresIn(600)
        Mockito.verify(response, Mockito.times(1)).setHeader("Cache-Control", "public, max-age=600")
        Mockito.verify(response, Mockito.times(1)).setHeader(Mockito.eq("Expires"), Mockito.anyString())

    }