@Test
 public void key() {
   when(service.getKey(APP_NAME, VERSION, ENV, KEY)).thenReturn(VALUE);
   String value = get.key(APP_NAME, VERSION, ENV, KEY);
   assertEquals(VALUE, value);
 }
 @Test
 public void version() {
   when(service.getVersion()).thenReturn("VX");
   String value = get.version();
   assertEquals("VX", value);
 }