@Test
 public void whenTheFileNameDoesNotEndWithOneOfTheGivenExtensions_ThenItShouldBeFiltered() {
   when(file.getName()).thenReturn("test.jpeg");
   assertThat(filter.processRecord(fileRecord)).isEqualTo(fileRecord);
 }
 @Test
 public void whenTheFileNameEndsWithOneOfTheGivenExtensions_ThenItShouldBeFiltered() {
   when(file.getName()).thenReturn("test.txt");
   assertThat(filter.processRecord(fileRecord)).isNull();
 }