/**
* Tests the {@link EMFCompareMap}'s key set. The set's iterator is expected to throw a {@link
* ConcurrentModificationException} if its original map is structurally modified via the
* put(Object) method.
*/
public void testConcurrentPut() {
testedMethod = "Put(Object)";
final Iterator keyIterator = testedMap.keySet().iterator();
// This entry cannot exist (random value as a key, random key as a value)
testedMap.put(VALUE_SET[5], KEY_SET[10]);
try {
keyIterator.next();
fail(MESSAGE_CONCURRENT + ' ' + testedMethod + '.');
} catch (ConcurrentModificationException e) {
// We expected this
} catch (NoSuchElementException e) {
fail(MESSAGE_CONCURRENT + ' ' + testedMethod + '.');
}
}
/**
* Tests the {@link EMFCompareMap}'s key set. The set is expected to support the
* retainAll(Collection) operation and it effectively removes all the map's element not contained
* within the given collection.
*/
public void testRetainAll() {
testedMethod = "RetainAll(Collection)";
Set keySet = testedMap.keySet();
final Set retainedElements = new HashSet();
try {
keySet.retainAll(retainedElements);
} catch (UnsupportedOperationException e) {
fail(testedMethod + ' ' + MESSAGE_UNSUPPORTED);
}
assertEquals("Map should have been emptied by its keySet retainAll().", 0, testedMap.size());
for (int i = 0; i < KEY_SET.length; i++) {
// Adds more and more values to the map for each loop
for (int j = 0; j < i; j++) {
testedMap.put(KEY_SET[j], VALUE_SET[j]);
}
keySet = testedMap.keySet();
// Create an array of the entries to avoid concurrent modification exception
final Object[] array = keySet.toArray();
int currentMapSize = testedMap.size();
for (int j = 0; j < array.length; j++) {
for (int k = 0; k < array.length - j; k++) {
retainedElements.add(array[k]);
}
try {
keySet.retainAll(retainedElements);
} catch (UnsupportedOperationException e) {
fail(testedMethod + ' ' + MESSAGE_UNSUPPORTED);
}
for (int k = 0; k < array.length - j; k++) {
assertTrue(
"Operation retainAll(Collection) did not retain necessary elements within the map.",
testedMap.containsKey(array[k]));
}
assertEquals(
"Unexpected size of the map after retainAll() execution.",
currentMapSize--,
array.length - j);
}
}
}
/**
* {@inheritDoc}
*
* @see junit.framework.TestCase#setUp()
*/
@Override
protected void setUp() {
for (int i = 0; i < KEY_SET.length; i++) {
testedMap.put(KEY_SET[i], VALUE_SET[i]);
}
}