@Repeat(iterations = 10)
@Test
public void testPreallocatedSize() {
final Random randomVK = RandomizedTest.getRandom();
// Test that the container do not resize if less that the initial size
// 1) Choose a random number of elements
/*! #if ($TemplateOptions.isKType("GENERIC", "INT", "LONG", "FLOAT", "DOUBLE")) !*/
final int PREALLOCATED_SIZE = randomVK.nextInt(10000);
/*!
#elseif ($TemplateOptions.isKType("SHORT", "CHAR"))
int PREALLOCATED_SIZE = randomVK.nextInt(1500);
#else
int PREALLOCATED_SIZE = randomVK.nextInt(126);
#end !*/
final KTypeSet<KType> newSet =
createNewSetInstance(PREALLOCATED_SIZE, HashContainers.DEFAULT_LOAD_FACTOR);
// computed real capacity
final int realCapacity = newSet.capacity();
// 3) Add PREALLOCATED_SIZE different values. At the end, size() must be == realCapacity,
// and internal buffer/allocated must not have changed of size
final int contructorBufferSize = getKeys(newSet).length;
Assert.assertEquals(contructorBufferSize, getKeys(newSet).length);
for (int i = 0; i < 1.5 * realCapacity; i++) {
newSet.add(cast(i));
// internal size has not changed until realCapacity
if (newSet.size() <= realCapacity) {
Assert.assertEquals(contructorBufferSize, getKeys(newSet).length);
}
if (contructorBufferSize < getKeys(newSet).length) {
// The container as just reallocated, its actual size must be not too far from the previous
// capacity:
Assert.assertTrue(
"Container as reallocated at size = "
+ newSet.size()
+ " with previous capacity = "
+ realCapacity,
(newSet.size() - realCapacity) <= 3);
break;
}
}
}
@Repeat(iterations = 25)
@Seed("88DC7A1093FD66C5")
@Test
public void testNoOverallocation() {
final Random randomVK = RandomizedTest.getRandom();
// Test that the container do not resize if less that the initial size
// 1) Choose a random number of elements
/*! #if ($TemplateOptions.isKType("GENERIC", "INT", "LONG", "FLOAT", "DOUBLE")) !*/
final int PREALLOCATED_SIZE = randomVK.nextInt(10000);
/*!
#elseif ($TemplateOptions.isKType("SHORT", "CHAR"))
int PREALLOCATED_SIZE = randomVK.nextInt(126);
#else
int PREALLOCATED_SIZE = randomVK.nextInt(10000);
#end !*/
// 2) Preallocate to PREALLOCATED_SIZE, use default factor because copy-constructor use this.
final KTypeSet<KType> refContainer =
createNewSetInstance(PREALLOCATED_SIZE, HashContainers.DEFAULT_LOAD_FACTOR);
final int refCapacity = refContainer.capacity();
// 3) Fill with random values, random number of elements below preallocation
final int nbElements = RandomizedTest.randomInt(PREALLOCATED_SIZE);
for (int i = 0; i < nbElements; i++) {
refContainer.add(cast(i));
}
// Capacity must have not changed, i.e no reallocation must have occured.
Assert.assertEquals(refCapacity, refContainer.capacity());
final int nbRefElements = refContainer.size();
Assert.assertEquals(refCapacity, refContainer.capacity());
// 4) Duplicate by copy-construction and/or clone
KTypeSet<KType> clonedContainer = getClone(refContainer);
KTypeSet<KType> copiedContainer = getCopyConstructor(refContainer);
final int copiedCapacity = copiedContainer.capacity();
final int clonedCapacity = copiedContainer.capacity();
Assert.assertEquals(nbRefElements, clonedContainer.size());
Assert.assertEquals(nbRefElements, copiedContainer.size());
// Due to different pre-sizings, clones and copy constructed may or may not have the same
// capacity as the refContainer.
Assert.assertTrue(clonedContainer.equals(refContainer));
Assert.assertTrue(copiedContainer.equals(refContainer));
// Maybe we were lucky, iterate duplication over itself several times
for (int j = 0; j < 10; j++) {
clonedContainer = getClone(clonedContainer);
copiedContainer = getFrom(copiedContainer);
// when copied over itself, of course every characteristic must be constant, else something is
// wrong.
Assert.assertEquals("j = " + j, nbRefElements, clonedContainer.size());
Assert.assertEquals("j = " + j, nbRefElements, copiedContainer.size());
Assert.assertEquals("j = " + j, clonedCapacity, clonedContainer.capacity());
Assert.assertEquals("j = " + j, copiedCapacity, copiedContainer.capacity());
Assert.assertTrue("j = " + j, clonedContainer.equals(refContainer));
Assert.assertTrue("j = " + j, copiedContainer.equals(refContainer));
}
}