public void testBoundaries() {
// cut and paste from single link
CompleteLinkClusterer<String> clusterer =
new CompleteLinkClusterer<String>(SingleLinkClustererTest.TEST_DISTANCE);
Set<String> elts0 = new HashSet<String>();
try {
clusterer.hierarchicalCluster(elts0);
fail();
} catch (IllegalArgumentException iae) {
succeed();
}
Set<Set<String>> clusters = clusterer.cluster(elts0);
assertEquals(0, clusters.size());
Set<String> elts1 = new HashSet<String>();
elts1.add("A");
Set<Set<String>> clustering = new HashSet<Set<String>>();
clustering.add(elts1);
assertEquals(clustering, clusterer.cluster(elts1));
Dendrogram<String> dendro1 = clusterer.hierarchicalCluster(elts1);
assertTrue(dendro1 instanceof LeafDendrogram);
assertEquals(elts1, dendro1.memberSet());
assertEquals(0.0, dendro1.score(), 0.001);
}
