void HashMapTest::testRemove() {
{
HashMap<int, std::string> hashMap;
populateMap(hashMap);
int size = hashMap.size();
CPPUNIT_ASSERT_NO_THROW_MESSAGE("Remove returned incorrect value", hashMap.remove(9));
CPPUNIT_ASSERT_THROW_MESSAGE(
"Should have thrown a NoSuchElementException on get of non-existent key.",
hashMap.get(9),
NoSuchElementException);
CPPUNIT_ASSERT_MESSAGE("Failed to decrement size", hashMap.size() == (size - 1));
CPPUNIT_ASSERT_THROW_MESSAGE(
"Should have thrown a NoSuchElementException on remove of non-existent key.",
hashMap.remove(9),
NoSuchElementException);
}
{
HashMap<int, std::string> hashMap;
for (int i = 0; i < 8192; i++) {
hashMap.put(i, "const");
}
for (int i = 0; i < 8192; i++) {
hashMap.put(i, Integer::toString(i));
}
for (int i = 8191; i >= 0; i--) {
std::string iValue = Integer::toString(i);
CPPUNIT_ASSERT_MESSAGE(std::string("Failed to replace value: ") + iValue,
hashMap.containsValue(iValue));
hashMap.remove(i);
CPPUNIT_ASSERT_MESSAGE(std::string("Failed to remove same value: ") + iValue,
!hashMap.containsValue(iValue));
}
}
{
// Ensure keys with identical hashcode are stored separately and removed correctly.
HashMap<MyKey, std::string> map;
// Put non-equal object with same hashcode
MyKey aKey;
CPPUNIT_ASSERT(!map.containsKey(aKey));
map.put(aKey, "value");
MyKey aKey2;
CPPUNIT_ASSERT_THROW_MESSAGE(
"Should have thrown NoSuchElementException",
map.remove(aKey2),
NoSuchElementException);
MyKey aKey3;
map.put(aKey3, "foobar");
CPPUNIT_ASSERT_EQUAL(std::string("foobar"), map.get(aKey3));
CPPUNIT_ASSERT_EQUAL(std::string("value"), map.get(aKey));
map.remove(aKey);
map.remove(aKey3);
CPPUNIT_ASSERT(!map.containsKey(aKey));
CPPUNIT_ASSERT(map.isEmpty());
}
}
void HashMapTest::testContainsValue() {
HashMap<int, std::string> hashMap;
hashMap.put(876, "test");
CPPUNIT_ASSERT_MESSAGE("Returned false for valid value", hashMap.containsValue("test"));
CPPUNIT_ASSERT_MESSAGE("Returned true for invalid valie", !hashMap.containsValue(""));
}
void HashMapTest::testConstructor() {
HashMap<int, std::string> map;
CPPUNIT_ASSERT(map.isEmpty());
CPPUNIT_ASSERT_EQUAL(0, map.size());
CPPUNIT_ASSERT_EQUAL(false, map.containsKey(1));
CPPUNIT_ASSERT_EQUAL(false, map.containsValue("test"));
}
void HashMapTest::testEntrySet() {
HashMap<int, std::string> hashMap;
for (int i = 0; i < 50; i++) {
hashMap.put(i, Integer::toString(i));
}
Set<MapEntry<int, std::string> >& set = hashMap.entrySet();
Pointer< Iterator<MapEntry<int, std::string> > > iterator(set.iterator());
CPPUNIT_ASSERT_MESSAGE("Returned set of incorrect size", hashMap.size() == set.size());
while (iterator->hasNext()) {
MapEntry<int, std::string> entry = iterator->next();
CPPUNIT_ASSERT_MESSAGE("Returned incorrect entry set",
hashMap.containsKey(entry.getKey()) && hashMap.containsValue(entry.getValue()));
}
iterator.reset(set.iterator());
set.remove(iterator->next());
CPPUNIT_ASSERT_EQUAL_MESSAGE("Remove on set didn't take", 49, set.size());
}
