@Test(timeout = 5 * 60 * 1000)
public void testJNIMemoryManagerHeapExpansion() {
LinkedList<RefCountedTester> heldRefs = new LinkedList<RefCountedTester>();
JNIMemoryManager mgr = JNIMemoryManager.getMgr();
mgr.flush();
mgr.setMinimumReferencesToCache(1024);
int maxItems = 10000;
// 10000 should cause several heap expansions to occur
for (int i = 0; i < maxItems; i++) {
heldRefs.add(RefCountedTester.make());
}
assertEquals("didn't pin as many as it should", maxItems, mgr.getNumPinnedObjects());
// now release them.
heldRefs.clear();
while (mgr.getNumPinnedObjects() != 0) {
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
// Do a collection
mgr.gc(true);
}
assertEquals("didn't pin as many as it should", 0, mgr.getNumPinnedObjects());
// this should cause the heap to shrink, and then grow
for (int i = 0; i < maxItems / 2; i++) {
heldRefs.add(RefCountedTester.make());
}
assertEquals("didn't pin as many as it should", maxItems / 2, mgr.getNumPinnedObjects());
// now release them.
heldRefs.clear();
// and force a collection
while (mgr.getNumPinnedObjects() != 0) {
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
// Do a collection
mgr.gc(true);
}
assertEquals("didn't pin as many as it should", 0, mgr.getNumPinnedObjects());
}
@Test(timeout = 60 * 1000)
public void testReferenceCountingLoadTestOfDeath() throws InterruptedException {
assertEquals(
"should be no objects for collection", 0, JNIReference.getMgr().getNumPinnedObjects());
RefCountedTester obj = RefCountedTester.make();
for (int i = 0; i < 1000; i++) {
RefCountedTester copy = obj.copyReference();
assertNotNull("could not copy reference", copy);
}
obj = null;
// Force a java collection
while (JNIReference.getMgr().getNumPinnedObjects() > 0)
MemoryTestHelper.forceJavaHeapWeakReferenceClear();
assertEquals("Looks like we leaked an object", 0, JNIReference.getMgr().getNumPinnedObjects());
}