@Test
	@SuppressWarnings("unused")
	public void testThresholdOfNeighborhood() throws Exception {
		// keeping the same implementation as before except that we use a threshold based neighborhood
		// how does the threshold of the neighborhood influence the performance (root mean square error) of the recommender?
		
		double[] thresholds = {0.9, 0.7, 0.5, 0.1, 0.05, 0.001, 0.005, 0.001, 0.0001, 0.00001};
		
		for (final double threshold : thresholds) {
			// make random behave always in the same manner
			RandomUtils.useTestSeed();
			
			Assert.fail();
		}
	}