new GenericItemSimilarity.ItemItemSimilarity(1L, 3L, 0.2),
new GenericItemSimilarity.ItemItemSimilarity(2L, 1L, 0.2),
new GenericItemSimilarity.ItemItemSimilarity(3L, 5L, 0.2),
new GenericItemSimilarity.ItemItemSimilarity(3L, 4L, 0.2));
ItemSimilarity similarity = new GenericItemSimilarity(itemItemSimilarities);
assertTrue(containsExactly(similarity.allSimilarItemIDs(1L), 2L, 3L));
assertTrue(containsExactly(similarity.allSimilarItemIDs(2L), 1L));
assertTrue(containsExactly(similarity.allSimilarItemIDs(3L), 1L, 5L, 4L));
assertTrue(containsExactly(similarity.allSimilarItemIDs(4L), 3L));
assertTrue(containsExactly(similarity.allSimilarItemIDs(5L), 3L));
}