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package org.glassfish.hk2.testing.collections;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.junit.Assert;
import org.junit.Test;
/**
* This class should be used to test the basic
* Map functionality of those classes implementing
* the Map interface.
*
* Maps are generally constructed with either a zero
* argument constructor or a constructor that
* gives an initial map. Subclasses of this class
* must implement the methods to create the Maps
* using these two common concrete schemes.
*
* Other protected methods in this class control
* whether or not the Map implementation implements
* some of the optional features of the Map interface.
*
*
* @author Copyright 2011 Oracle
*/
@SuppressWarnings({"unchecked","rawtypes"})
public abstract class AbstractMapTest {
protected final static String NULL_KEY = "null";
protected final static String NULL_VALUE = "null";
protected final static String ONE_KEY = "One";
protected final static String ONE_VALUE = "1";
protected final static String TWO_KEY = "Two";
protected final static String TWO_VALUE = "2";
protected final static String THREE_KEY = "Three";
protected final static String THREE_VALUE = "3";
protected final static String FOUR_KEY = "Four";
protected final static String FOUR_VALUE = "4";
private TestCollectionElement globalOneKey;
private TestCollectionElement globalTwoKey;
private TestCollectionElement globalThreeKey;
private TestCollectionElement globalOneValue;
private TestCollectionElement globalTwoValue;
private TestCollectionElement globalThreeValue;
/**
* Subclasses should override this method if their Map
* implementation does not support a null argument
* constructor. All tests having to use the null argument
* constructor will pass silently
*
* @return true if a null argument constructor is supported
*/
protected boolean isNullArgumentConstructorSupported() {
return true;
}
/**
* Subclasses should override this method if their Map
* implementation does not support a Map argument
* constructor. All tests having to use the Map argument
* constructor will pass silently
*
* @return true if a null argument constructor is supported
*/
protected boolean isMapArgumentConstructorSupported() {
return true;
}
/**
* Subclasses should override this method if their Map
* implementation delegates to the passed in Map.
* Normally a collection makes a copy of the input, but
* there are many map implementations that instead delegate to
* the passed in map
*
* @return true if the Map implementation delegates to the
* Map passed into the constructor
*/
protected boolean doesMapDelegateFromOriginalMap() {
return false;
}
/**
* Subclasses should override this method if their Map
* implementation does not support null as an key in
* the Map.
*
* @return true if the Map allows null keys to be added
* to the map
*/
protected boolean doesMapAllowNullKeys() {
return true;
}
/**
* Subclasses should override this method if their Map
* implementation does not support null as an value in
* the Map.
*
* @return true if the Map allows null values to be added
* to the map
*/
protected boolean doesMapAllowNullValues() {
return true;
}
/**
* Subclasses should override this method if their Map
* does not support the optional remove method.
*
* @return true if the Map supports the optional
* remove operation, and false otherwise
*/
protected boolean doesMapSupportRemove() {
return true;
}
/**
* Subclasses must override this method in order to construct
* an empty Map with the null argument constructor. If
* isNullArgumentConstructorSupported returns false then this
* method will never be called
*
* @return An empty Map
*/
protected abstract Map createMap();
/**
* Subclasses must override this method in order to construct
* a Map with the elements found in the input Map.
* If isMapArgumentConstructorSupported returns false then
* this method will never be called
*
* @param input A possibly empty map of items
* to seed the Map with
* @return An Map that has all of the elements of the input
* collection
*/
protected abstract Map createMap(Map input);
/**
* This returns an implementation of TestCollectionElement that
* will be put into the Collection implementation. Note that
* subclasses should override this if they are in a situation
* where the collection must only contain a particular type of
* Object. In that case they may need to subclass the type or
* have an implementation of the internal type that implements both
* the necessary type and TestCollectionElement.
*
* @param data The string that must be returned via the listElementReturn
* method
* @return A new instance of the ListElement type
*/
protected TestCollectionElement getElement(String data) {
return new DefaultTestCollectionElement(data);
}
private Map createEmptyMap() {
if (isNullArgumentConstructorSupported()) {
return createMap();
}
if (isMapArgumentConstructorSupported()) {
return createMap(new HashMap());
}
Assert.fail("Neither null nor Collection constructor is supported by the List implementation");
return null;
}
/**
* Tests that a list constructed from the null constructor has
* size zero
*/
@Test
public void testMapFromNullConstructorHasZeroSize() {
if (!isNullArgumentConstructorSupported()) {
return;
}
Map myMap = createMap();
assertEquals(0, myMap.size());
assertTrue(myMap.isEmpty());
}
/**
* Tests that a list constructed from the empty collection
* constructor has size zero
*/
@Test
public void testMapFromMapConstructorHasZeroSize() {
if (!isMapArgumentConstructorSupported()) {
return;
}
Map myMap = createMap(Collections.emptyMap());
assertEquals(0, myMap.size());
assertTrue(myMap.isEmpty());
}
/**
* Tests that a list constructed from the empty collection
* constructor has size zero
*/
@Test(expected=NullPointerException.class)
public void testMapConstructedWithNullMapThrows() {
if (!isMapArgumentConstructorSupported()) {
throw new NullPointerException();
}
createMap(null);
}
/**
* Tests that a single element can be added to the list
*/
@Test
public void testCanAddToMap() {
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
map.put(oneKey, oneValue);
assertEquals(1, map.size());
assertFalse(map.isEmpty());
assertTrue(map.containsKey(oneKey));
assertTrue(map.containsValue(oneValue));
assertEquals(oneValue, map.get(oneKey));
}
/**
* Tests that modifying the elements in the original collection
* do not affect the elements in the newly created collection
*/
@Test
public void testModifyingOriginalCollectionDoesNotAffectNewCollection() {
if (!isMapArgumentConstructorSupported() ||
doesMapDelegateFromOriginalMap()) {
return;
}
HashMap originalList =
new HashMap();
originalList.put(getElement(ONE_KEY), getElement(ONE_VALUE));
originalList.put(getElement(TWO_KEY), getElement(TWO_VALUE));
Map mapUnderTest = createMap(originalList);
originalList.put(getElement(THREE_KEY), getElement(THREE_VALUE));
// Make sure the original list did not get modified
assertEquals(2, mapUnderTest.size());
originalList.clear();
// Check it a second way
assertEquals(2, mapUnderTest.size());
}
/**
* Tests that contains works properly
*/
@Test
public void testContainsAfterPut() {
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement twoKey = getElement(TWO_KEY);
TestCollectionElement threeKey = getElement(THREE_KEY);
TestCollectionElement fourKey = getElement(FOUR_KEY); // not added
TestCollectionElement oneValue = getElement(ONE_VALUE);
TestCollectionElement twoValue = getElement(TWO_VALUE);
TestCollectionElement threeValue = getElement(THREE_VALUE);
TestCollectionElement fourValue = getElement(FOUR_VALUE); // not added
map.put(oneKey, oneValue);
map.put(twoKey, twoValue);
map.put(threeKey, threeValue);
assertTrue(map.containsKey(threeKey));
assertTrue(map.containsKey(twoKey));
assertTrue(map.containsKey(oneKey));
assertFalse(map.containsKey(fourKey));
assertTrue(map.containsValue(threeValue));
assertTrue(map.containsValue(twoValue));
assertTrue(map.containsValue(oneValue));
assertFalse(map.containsValue(fourValue));
if (doesMapAllowNullKeys()) {
assertFalse(map.containsKey(null));
}
if (doesMapAllowNullValues()) {
assertFalse(map.containsValue(null));
}
}
/**
* Tests that the map functions properly with
* a null key added
*/
@Test
public void testCanMapHaveNullKeys() {
if (!doesMapAllowNullKeys()) {
return;
}
Map map = createEmptyMap();
TestCollectionElement oneValue = getElement(ONE_VALUE);
map.put(null, oneValue);
assertEquals(1, map.size());
assertTrue(map.containsKey(null));
assertTrue(map.containsValue(oneValue));
assertEquals(oneValue, map.get(null));
}
/**
* Tests that the map functions properly with
* a null value added
*/
@Test
public void testCanMapHaveNullValues() {
if (!doesMapAllowNullValues()) {
return;
}
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
map.put(oneKey, null);
assertEquals(1, map.size());
assertTrue(map.containsKey(oneKey));
assertTrue(map.containsValue(null));
assertNull(map.get(oneKey));
}
private TestCollectionElement getSafeNullKey() {
if (doesMapAllowNullKeys()) return null;
return getElement(NULL_KEY);
}
private TestCollectionElement getSafeNullValue() {
if (doesMapAllowNullValues()) return null;
return getElement(NULL_VALUE);
}
/**
* Tests that maps can have null keys and values
* interspersed with non-null entries
*/
@Test
public void testCanCollectionHaveNullAndNonNullEntries() {
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement twoKey = getElement(TWO_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
TestCollectionElement twoValue = getElement(TWO_VALUE);
TestCollectionElement nullKey = getSafeNullKey();
TestCollectionElement threeKey = getElement(THREE_KEY);
TestCollectionElement threeValue = getElement(THREE_VALUE);
TestCollectionElement nullValue = getSafeNullValue();
TestCollectionElement fourKey = getElement(FOUR_KEY);
TestCollectionElement fourValue = getElement(FOUR_VALUE);
map.put(nullKey, twoValue); // Careful, this mixes it up a bit
map.put(oneKey, oneValue);
map.put(twoKey, nullValue);
map.put(threeKey, threeValue);
map.put(fourKey, nullValue); // put null in as value twice
// Now some checking, first check size
assertEquals(5, map.size());
// Also check containsKey
assertTrue(map.containsKey(nullKey));
assertTrue(map.containsKey(oneKey));
assertTrue(map.containsKey(twoKey));
assertTrue(map.containsKey(threeKey));
assertTrue(map.containsKey(fourKey));
// Also check containsValue
assertTrue(map.containsValue(nullValue));
assertTrue(map.containsValue(oneValue));
assertTrue(map.containsValue(twoValue));
assertTrue(map.containsValue(threeValue));
assertFalse(map.containsValue(fourValue));
// And check the gets
assertEquals(twoValue, map.get(nullKey));
assertEquals(oneValue, map.get(oneKey));
assertEquals(nullValue, map.get(twoKey));
assertEquals(threeValue, map.get(threeKey));
assertEquals(nullValue, map.get(fourKey));
}
/**
* This test ensures that remove works properly in an empty map
*/
@Test
public void testRemoveFromEmptyMap() {
if (!doesMapSupportRemove()) return;
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
assertNull(map.remove(oneKey));
assertEquals(0, map.size());
assertTrue(map.isEmpty());
}
/**
* This test ensures that remove returns the proper value
*/
@Test
public void testRemoveFromOneElementMap() {
if (!doesMapSupportRemove()) return;
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
map.put(oneKey, oneValue);
assertEquals(oneValue, map.remove(oneKey));
assertEquals(0, map.size());
assertTrue(map.isEmpty());
}
/**
* This test ensures that remove can remove the
* first item added to the collection
*/
@Test
public void testRemoveFirstThingFromMultiElementMap() {
if (!doesMapSupportRemove()) return;
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement twoKey = getElement(TWO_KEY);
TestCollectionElement threeKey = getElement(THREE_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
TestCollectionElement twoValue = getElement(TWO_VALUE);
TestCollectionElement threeValue = getElement(THREE_VALUE);
map.put(oneKey, oneValue);
map.put(twoKey, twoValue);
map.put(threeKey, threeValue);
assertEquals(oneValue, map.remove(oneKey));
assertEquals(2, map.size());
assertFalse(map.isEmpty());
assertTrue(map.containsKey(twoKey));
assertTrue(map.containsValue(threeValue));
assertFalse(map.containsKey(oneKey));
assertFalse(map.containsValue(oneValue));
}
/**
* This test ensures that remove can remove the
* first item added to the map
*/
@Test
public void testRemoveLastThingFromMultiElementMap() {
if (!doesMapSupportRemove()) return;
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement twoKey = getElement(TWO_KEY);
TestCollectionElement threeKey = getElement(THREE_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
TestCollectionElement twoValue = getElement(TWO_VALUE);
TestCollectionElement threeValue = getElement(THREE_VALUE);
map.put(oneKey, oneValue);
map.put(twoKey, twoValue);
map.put(threeKey, threeValue);
assertEquals(threeValue, map.remove(threeKey));
assertEquals(2, map.size());
assertFalse(map.isEmpty());
assertTrue(map.containsKey(twoKey));
assertTrue(map.containsValue(oneValue));
assertFalse(map.containsKey(threeKey));
assertFalse(map.containsValue(threeValue));
}
/**
* This test ensures that remove can remove the
* first item added to the map
*/
@Test
public void testRemoveMiddleThingFromMultiElementMap() {
if (!doesMapSupportRemove()) return;
Map map = createEmptyMap();
TestCollectionElement oneKey = getElement(ONE_KEY);
TestCollectionElement twoKey = getElement(TWO_KEY);
TestCollectionElement threeKey = getElement(THREE_KEY);
TestCollectionElement oneValue = getElement(ONE_VALUE);
TestCollectionElement twoValue = getElement(TWO_VALUE);
TestCollectionElement threeValue = getElement(THREE_VALUE);
map.put(oneKey, oneValue);
map.put(twoKey, twoValue);
map.put(threeKey, threeValue);
assertEquals(twoValue, map.remove(twoKey));
assertEquals(2, map.size());
assertFalse(map.isEmpty());
assertTrue(map.containsKey(threeKey));
assertTrue(map.containsValue(oneValue));
assertFalse(map.containsKey(twoKey));
assertFalse(map.containsValue(twoValue));
}
private void addGlobalsToMap(Map aMap) {
globalOneKey = getElement(ONE_KEY);
globalTwoKey = getElement(TWO_KEY);
globalThreeKey = getElement(THREE_KEY);
globalOneValue = getElement(ONE_VALUE);
globalTwoValue = getElement(TWO_VALUE);
globalThreeValue = getElement(THREE_VALUE);
aMap.put(globalOneKey, globalOneValue);
aMap.put(globalTwoKey, globalTwoValue);
aMap.put(globalThreeKey, globalThreeValue);
}
private Map createMapWithOneTwoThree() {
HashMap retVal =
new HashMap();
addGlobalsToMap(retVal);
return retVal;
}
/**
* This test ensures that putAll works with
* an empty map and an empty adding map
*/
@Test
public void testPutAllEmptyOriginalEmptyAdding() {
Map originalMap = createEmptyMap();
Map putAllMap = createEmptyMap();
originalMap.putAll(putAllMap);
assertTrue(originalMap.isEmpty());
}
/**
* This test ensures that putAll works with
* an empty map and an non-empty adding map
*/
@Test
public void testPutAllEmptyOriginalNonEmptyAdding() {
Map originalMap = createEmptyMap();
Map putAllMap = createMapWithOneTwoThree();
originalMap.putAll(putAllMap);
assertEquals(3, originalMap.size());
assertTrue(originalMap.containsKey(globalOneKey));
assertTrue(originalMap.containsKey(globalTwoKey));
assertTrue(originalMap.containsKey(globalThreeKey));
assertTrue(originalMap.containsValue(globalOneValue));
assertTrue(originalMap.containsValue(globalTwoValue));
assertTrue(originalMap.containsValue(globalThreeValue));
assertEquals(globalOneValue, originalMap.get(globalOneKey));
assertEquals(globalTwoValue, originalMap.get(globalTwoKey));
assertEquals(globalThreeValue, originalMap.get(globalThreeKey));
}
/**
* This test ensures that putAll works with
* an non-empty map and an empty adding map
*/
@Test
public void testPutAllNonEmptyOriginalEmptyAdding() {
Map originalMap = createEmptyMap();
Map putAllMap = createEmptyMap();
addGlobalsToMap(originalMap);
originalMap.putAll(putAllMap);
assertEquals(3, originalMap.size());
assertTrue(originalMap.containsKey(globalOneKey));
assertTrue(originalMap.containsKey(globalTwoKey));
assertTrue(originalMap.containsKey(globalThreeKey));
assertTrue(originalMap.containsValue(globalOneValue));
assertTrue(originalMap.containsValue(globalTwoValue));
assertTrue(originalMap.containsValue(globalThreeValue));
assertEquals(globalOneValue, originalMap.get(globalOneKey));
assertEquals(globalTwoValue, originalMap.get(globalTwoKey));
assertEquals(globalThreeValue, originalMap.get(globalThreeKey));
}
/**
* This test ensures that putAll works with
* an non-empty map and an non-empty adding map
*/
@Test
public void testPutAllNonEmptyOriginalNonEmptyAdding() {
Map originalMap = createEmptyMap();
Map putAllMap = createMapWithOneTwoThree();
TestCollectionElement fourKey = getElement(FOUR_KEY);
TestCollectionElement fourValue = getElement(FOUR_VALUE);
originalMap.put(fourKey, fourValue);
originalMap.putAll(putAllMap);
assertEquals(4, originalMap.size());
assertTrue(originalMap.containsKey(globalOneKey));
assertTrue(originalMap.containsKey(globalTwoKey));
assertTrue(originalMap.containsKey(globalThreeKey));
assertTrue(originalMap.containsKey(fourKey));
assertTrue(originalMap.containsValue(globalOneValue));
assertTrue(originalMap.containsValue(globalTwoValue));
assertTrue(originalMap.containsValue(globalThreeValue));
assertTrue(originalMap.containsValue(fourValue));
assertEquals(globalOneValue, originalMap.get(globalOneKey));
assertEquals(globalTwoValue, originalMap.get(globalTwoKey));
assertEquals(globalThreeValue, originalMap.get(globalThreeKey));
assertEquals(fourValue, originalMap.get(fourKey));
}
/**
* This test ensures that clear works on
* an empty map
*/
@Test
public void testClearOnEmptyMap() {
if (!doesMapSupportRemove()) return;
Map originalMap = createEmptyMap();
originalMap.clear();
assertTrue(originalMap.isEmpty());
}
/**
* This test ensures that putAll works with
* an non-empty map and an non-empty adding map
*/
@Test
public void testClearOnNonEmptyMap() {
if (!doesMapSupportRemove()) return;
Map originalMap = createEmptyMap();
addGlobalsToMap(originalMap);
originalMap.clear();
assertTrue(originalMap.isEmpty());
}
/**
* This test ensures that keySet works with
* an empty map
*/
@Test
public void testKeySetOnEmptyMap() {
Map originalMap = createEmptyMap();
Set set = originalMap.keySet();
assertTrue(set.isEmpty());
}
/**
* This test ensures that keySet works with
* an non-empty map
*/
@Test
public void testKeySetOnNonEmptyMap() {
Map originalMap = createEmptyMap();
addGlobalsToMap(originalMap);
Set set = originalMap.keySet();
assertEquals(3, set.size());
assertTrue(set.contains(globalOneKey));
assertTrue(set.contains(globalTwoKey));
assertTrue(set.contains(globalThreeKey));
}
/**
* This test ensures that values works with
* an empty map
*/
@Test
public void testValuesOnEmptyMap() {
Map originalMap = createEmptyMap();
Collection collection = originalMap.values();
assertTrue(collection.isEmpty());
}
/**
* This test ensures that values works with
* an non-empty map
*/
@Test
public void testValuesOnNonEmptyMap() {
Map originalMap = createEmptyMap();
addGlobalsToMap(originalMap);
Collection values = originalMap.values();
assertEquals(3, values.size());
assertTrue(values.contains(globalOneValue));
assertTrue(values.contains(globalTwoValue));
assertTrue(values.contains(globalThreeValue));
}
/**
* This test ensures that entrySet works with
* an empty map
*/
@Test
public void testEntrySetOnEmptyMap() {
Map originalMap = createEmptyMap();
Set set = originalMap.entrySet();
assertTrue(set.isEmpty());
}
/**
* This test ensures that entrySet works with
* an non-empty map
*/
@Test
public void testEntrySetOnNonEmptyMap() {
Map originalMap = createEmptyMap();
addGlobalsToMap(originalMap);
Set entrySet = originalMap.entrySet();
assertEquals(3, entrySet.size());
boolean gotOne = false;
boolean gotTwo = false;
boolean gotThree = false;
for (Object rawEntry : entrySet) {
assertTrue(rawEntry instanceof Map.Entry);
Map.Entry entry = (Map.Entry) rawEntry;
if (entry.getKey().equals(globalOneKey)) {
assertFalse(gotOne);
gotOne = true;
assertEquals(entry.getValue(), globalOneValue);
}
else if (entry.getKey().equals(globalTwoKey)) {
assertFalse(gotTwo);
gotTwo = true;
assertEquals(entry.getValue(), globalTwoValue);
}
else if (entry.getKey().equals(globalThreeKey)) {
assertFalse(gotThree);
gotThree = true;
assertEquals(entry.getValue(), globalThreeValue);
}
else {
fail("Unknown entry " + entry.getKey() + " value " + entry.getValue());
}
}
assertTrue(gotOne);
assertTrue(gotTwo);
assertTrue(gotThree);
}
private static int keyToInt(TestCollectionElement key) {
String value = key.testCollectionValue();
try {
return Integer.parseInt(value);
}
catch (NumberFormatException nfe) {
return -1;
}
}
/**
* Tries to test the resizing of the collection
* by adding 1000 items
*/
@Test
public void testAddOneThousandEntries() {
Map map = createEmptyMap();
HashSet keys = new HashSet();
for (int lcv = 0; lcv < 1000; lcv++) {
TestCollectionElement element = getElement("" + lcv);
map.put(element, new Integer(lcv));
keys.add(element);
}
for (TestCollectionElement key : keys) {
assertTrue(map.containsKey(key));
int keyValue = keyToInt(key);
Integer value = (Integer) map.get(key);
assertEquals(keyValue, value.intValue());
}
}
}