@Test
	@SuppressWarnings("unused")
	public void testSizeOfNeighborhood() throws Exception {
		// keeping the same implementation as before
		// how does the size of the neighborhood influence the performance (root mean square error) of the recommender?
		int[] sizes = {5, 10, 20, 40, 100, 200, 300, 400, 600, 800, 1200};
		
		for (final int n : sizes) {
			// make random behave always in the same manner
			RandomUtils.useTestSeed();
			
			Assert.fail();
		}
	}