	@Test
	public void testProcessFile() throws IOException {

		
		final int[] countFiles = { 0 };
		UsageDataUtil.processFile(zipItem, new UserInteractionEventCallback() {
			public boolean visit(UserInteractionEvent uie) {
				++countFiles[0];
				return true;
			}
		});
		Assert.assertEquals(18015, countFiles[0]);
	}