public void testGrowReplaceShrink() {
Random r = new Random();
int k = 10000;
String s = "A";
double t = 0;
FibonacciHeap<String> h = new FibonacciHeap<>();
for (int i = 0; i < (k * 3); ++i) {
// during first two-thirds, insert
if (i < (k * 2)) {
double d = r.nextDouble();
t += d;
FibonacciHeapNode<String> n = new FibonacciHeapNode<>(s);
h.insert(n, d);
}
// during last two-thirds, delete (so during middle
// third, we'll do both insert and delete, interleaved)
if (i >= k) {
FibonacciHeapNode<String> n2 = h.removeMin();
t -= n2.getKey();
}
}
assertTrue(h.isEmpty());
// tally should come back down to zero, or thereabouts (due to roundoff)
assertEquals(0.0, t, 0.00001);
}
// in honor of sf.net bug #1845376
public void testAddRemoveOne() {
String s = "A";
FibonacciHeapNode<String> n = new FibonacciHeapNode<>(s);
FibonacciHeap<String> h = new FibonacciHeap<>();
assertTrue(h.isEmpty());
h.insert(n, 1.0);
assertFalse(h.isEmpty());
FibonacciHeapNode<String> n2 = h.removeMin();
assertEquals(s, n2.getData());
assertTrue(h.isEmpty());
}
