@Test
	@SuppressWarnings("unused")
	public void testSimilarities() throws Exception {
		// keeping a neighborhood with the top 300 users
		// how does the similarity influence the performance (root mean square error) of the recommender?
		
		for (int i = 0; i < 8; i++) {
			final int n = i;
			// make random behave always in the same manner
			RandomUtils.useTestSeed();
			
			Assert.fail();
		}
	}