@Test
public void filesBeenChangedTestIOException() throws Exception {

    KeyRefresher keyRefresher = new KeyRefresher("", "", mockedTrustStore, mockedKeyManagerProxy, mockedTrustManagerProxy);
    assertFalse(keyRefresher.haveFilesBeenChanged(classLoader.getResource("").getPath(), new byte[md.getDigestLength()]));
}