@Test
public void testDeleteEmptyFile() throws IOException {

    // Make a temp directory
    final Path tempDirectory = Files.createTempDirectory(null);
    // Create manager
    final UploadManager uploadManager = new UploadManager(tempDirectory.toString());
    final boolean result = uploadManager.deleteKeyStore("");
    assertTrue("Gracefully returns true", result);
    // Sanity test
    assertTrue("Temp dir still exists", tempDirectory.toFile().exists());
}