/** Test a TreeMultiset with a comparator that can return 0 when comparing unequal values. */
public void testDegenerateComparator() throws Exception {
TreeMultiset<String> ms = TreeMultiset.create(DEGENERATE_COMPARATOR);
ms.add("foo");
ms.add("a");
ms.add("bar");
ms.add("b");
ms.add("c");
assertEquals(2, ms.count("bar"));
assertEquals(3, ms.count("b"));
Multiset<String> ms2 = TreeMultiset.create(DEGENERATE_COMPARATOR);
ms2.add("cat", 2);
ms2.add("x", 3);
assertEquals(ms, ms2);
assertEquals(ms2, ms);
SortedSet<String> elementSet = ms.elementSet();
assertEquals("a", elementSet.first());
assertEquals("foo", elementSet.last());
assertEquals(DEGENERATE_COMPARATOR, elementSet.comparator());
}
public void testCreate() {
TreeMultiset<String> multiset = TreeMultiset.create();
multiset.add("foo", 2);
multiset.add("bar");
assertEquals(3, multiset.size());
assertEquals(2, multiset.count("foo"));
assertEquals(Ordering.natural(), multiset.comparator());
assertEquals("[bar, foo x 2]", multiset.toString());
}
public void testSubMultisetSize() {
TreeMultiset<String> ms = TreeMultiset.create();
ms.add("a", Integer.MAX_VALUE);
ms.add("b", Integer.MAX_VALUE);
ms.add("c", 3);
assertEquals(Integer.MAX_VALUE, ms.count("a"));
assertEquals(Integer.MAX_VALUE, ms.count("b"));
assertEquals(3, ms.count("c"));
assertEquals(Integer.MAX_VALUE, ms.headMultiset("c", CLOSED).size());
assertEquals(Integer.MAX_VALUE, ms.headMultiset("b", CLOSED).size());
assertEquals(Integer.MAX_VALUE, ms.headMultiset("a", CLOSED).size());
assertEquals(3, ms.tailMultiset("c", CLOSED).size());
assertEquals(Integer.MAX_VALUE, ms.tailMultiset("b", CLOSED).size());
assertEquals(Integer.MAX_VALUE, ms.tailMultiset("a", CLOSED).size());
}
public void testNullAcceptingComparator() throws Exception {
Comparator<String> comparator = Ordering.<String>natural().nullsFirst();
TreeMultiset<String> ms = TreeMultiset.create(comparator);
ms.add("b");
ms.add(null);
ms.add("a");
ms.add("b");
ms.add(null, 2);
ASSERT.that(ms).has().exactly(null, null, null, "a", "b", "b").inOrder();
assertEquals(3, ms.count(null));
SortedSet<String> elementSet = ms.elementSet();
assertEquals(null, elementSet.first());
assertEquals("b", elementSet.last());
assertEquals(comparator, elementSet.comparator());
}