@Test
 public void shouldGetConfiguredValue() {
   String customValue = "my value";
   Mockito.when(context.getInitParameter(INEXISTENT_KEY)).thenReturn(customValue);
   String value = config.getOrDefault(DEFAULT, INEXISTENT_KEY);
   assertEquals(customValue, value);
 }
 @Test
 public void shouldGetDefaultValue() {
   WebXmlConfigurationGetter config = new WebXmlConfigurationGetter(context);
   String value = config.getOrDefault(DEFAULT, INEXISTENT_KEY);
   assertEquals(DEFAULT, value);
 }