@Test
public void test_getListOfCertificates() throws Exception {

    // Mock response        
    when(sslCertificateService.getListOfCertificates("5PDrOhsy4ig8L3EpsJZSLAMg","internal")).thenReturn(new ResponseEntity<>(HttpStatus.OK));
    assertEquals(HttpStatus.OK, sslCertificateService.getListOfCertificates("5PDrOhsy4ig8L3EpsJZSLAMg","internal").getStatusCode());
}