@Test
public void testSaveOneFile() throws Exception {

    final EntryNamesVerifyingStorage storage = new EntryNamesVerifyingStorage();
    final ConfigurationFileManager subject = getTestJenkinsConfiguration(storage);
    tempDir.newFile("example.txt");
    subject.saveConfiguration("*.txt", "");
    assertEquals(Collections.singletonList("example.txt"), storage.names);
}