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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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> |
* Pat Fisher, Mike Judd. |
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*/ |
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|
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import junit.framework.*; |
10 |
< |
import java.util.*; |
11 |
< |
import java.util.concurrent.*; |
9 |
> |
import java.util.Arrays; |
10 |
> |
import java.util.Collection; |
11 |
> |
import java.util.Iterator; |
12 |
> |
import java.util.LinkedList; |
13 |
> |
import java.util.List; |
14 |
> |
import java.util.NoSuchElementException; |
15 |
> |
import java.util.concurrent.ThreadLocalRandom; |
16 |
> |
|
17 |
> |
import junit.framework.Test; |
18 |
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|
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public class LinkedListTest extends JSR166TestCase { |
20 |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
21 |
> |
main(suite(), args); |
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} |
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|
24 |
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public static Test suite() { |
25 |
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return new TestSuite(LinkedListTest.class); |
25 |
> |
class Implementation implements CollectionImplementation { |
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> |
public Class<?> klazz() { return LinkedList.class; } |
27 |
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public List emptyCollection() { return new LinkedList(); } |
28 |
> |
public Object makeElement(int i) { return i; } |
29 |
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public boolean isConcurrent() { return false; } |
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public boolean permitsNulls() { return true; } |
31 |
> |
} |
32 |
> |
class SubListImplementation extends Implementation { |
33 |
> |
public List emptyCollection() { |
34 |
> |
List list = super.emptyCollection(); |
35 |
> |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
36 |
> |
if (rnd.nextBoolean()) |
37 |
> |
list.add(makeElement(rnd.nextInt())); |
38 |
> |
int i = rnd.nextInt(list.size() + 1); |
39 |
> |
return list.subList(i, i); |
40 |
> |
} |
41 |
> |
} |
42 |
> |
return newTestSuite( |
43 |
> |
LinkedListTest.class, |
44 |
> |
CollectionTest.testSuite(new Implementation()), |
45 |
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CollectionTest.testSuite(new SubListImplementation())); |
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} |
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|
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/** |
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* Create a queue of given size containing consecutive |
50 |
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* Integers 0 ... n. |
49 |
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* Returns a new queue of given size containing consecutive |
50 |
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* Integers 0 ... n - 1. |
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*/ |
52 |
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private LinkedList populatedQueue(int n) { |
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LinkedList q = new LinkedList(); |
52 |
> |
private static LinkedList<Integer> populatedQueue(int n) { |
53 |
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LinkedList<Integer> q = new LinkedList<>(); |
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assertTrue(q.isEmpty()); |
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for(int i = 0; i < n; ++i) |
56 |
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assertTrue(q.offer(new Integer(i))); |
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for (int i = 0; i < n; ++i) |
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assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(n, q.size()); |
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assertEquals(n, q.size()); |
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assertEquals((Integer) 0, q.peekFirst()); |
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assertEquals((Integer) (n - 1), q.peekLast()); |
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return q; |
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} |
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|
63 |
> |
|
64 |
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/** |
65 |
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* new queue is empty |
66 |
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*/ |
73 |
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*/ |
74 |
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public void testConstructor3() { |
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try { |
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LinkedList q = new LinkedList((Collection)null); |
76 |
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new LinkedList((Collection)null); |
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shouldThrow(); |
78 |
< |
} |
51 |
< |
catch (NullPointerException success) {} |
78 |
> |
} catch (NullPointerException success) {} |
79 |
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} |
80 |
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|
81 |
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/** |
82 |
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* Queue contains all elements of collection used to initialize |
56 |
– |
|
83 |
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*/ |
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public void testConstructor6() { |
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< |
try { |
86 |
< |
Integer[] ints = new Integer[SIZE]; |
87 |
< |
for (int i = 0; i < SIZE; ++i) |
88 |
< |
ints[i] = new Integer(i); |
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LinkedList q = new LinkedList(Arrays.asList(ints)); |
90 |
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for (int i = 0; i < SIZE; ++i) |
65 |
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assertEquals(ints[i], q.poll()); |
66 |
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} |
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finally {} |
85 |
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Integer[] ints = new Integer[SIZE]; |
86 |
> |
for (int i = 0; i < SIZE; ++i) |
87 |
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ints[i] = i; |
88 |
> |
LinkedList q = new LinkedList(Arrays.asList(ints)); |
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> |
for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
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/** |
110 |
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public void testSize() { |
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LinkedList q = populatedQueue(SIZE); |
112 |
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for (int i = 0; i < SIZE; ++i) { |
113 |
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assertEquals(SIZE-i, q.size()); |
113 |
> |
assertEquals(SIZE - i, q.size()); |
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q.remove(); |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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* offer(null) succeeds |
124 |
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*/ |
125 |
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public void testOfferNull() { |
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< |
try { |
127 |
< |
LinkedList q = new LinkedList(); |
128 |
< |
q.offer(null); |
129 |
< |
} catch (NullPointerException ie) { |
107 |
< |
unexpectedException(); |
108 |
< |
} |
126 |
> |
LinkedList q = new LinkedList(); |
127 |
> |
q.offer(null); |
128 |
> |
assertNull(q.get(0)); |
129 |
> |
assertTrue(q.contains(null)); |
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} |
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|
132 |
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/** |
133 |
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* Offer succeeds |
133 |
> |
* Offer succeeds |
134 |
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*/ |
135 |
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public void testOffer() { |
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LinkedList q = new LinkedList(); |
153 |
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* addAll(null) throws NPE |
154 |
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*/ |
155 |
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public void testAddAll1() { |
156 |
+ |
LinkedList q = new LinkedList(); |
157 |
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try { |
136 |
– |
LinkedList q = new LinkedList(); |
158 |
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q.addAll(null); |
159 |
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shouldThrow(); |
160 |
< |
} |
140 |
< |
catch (NullPointerException success) {} |
160 |
> |
} catch (NullPointerException success) {} |
161 |
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} |
162 |
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|
163 |
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/** |
164 |
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* Queue contains all elements, in traversal order, of successful addAll |
165 |
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*/ |
166 |
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public void testAddAll5() { |
167 |
< |
try { |
168 |
< |
Integer[] empty = new Integer[0]; |
169 |
< |
Integer[] ints = new Integer[SIZE]; |
170 |
< |
for (int i = 0; i < SIZE; ++i) |
171 |
< |
ints[i] = new Integer(i); |
172 |
< |
LinkedList q = new LinkedList(); |
173 |
< |
assertFalse(q.addAll(Arrays.asList(empty))); |
174 |
< |
assertTrue(q.addAll(Arrays.asList(ints))); |
175 |
< |
for (int i = 0; i < SIZE; ++i) |
156 |
< |
assertEquals(ints[i], q.poll()); |
157 |
< |
} |
158 |
< |
finally {} |
167 |
> |
Integer[] empty = new Integer[0]; |
168 |
> |
Integer[] ints = new Integer[SIZE]; |
169 |
> |
for (int i = 0; i < SIZE; ++i) |
170 |
> |
ints[i] = i; |
171 |
> |
LinkedList q = new LinkedList(); |
172 |
> |
assertFalse(q.addAll(Arrays.asList(empty))); |
173 |
> |
assertTrue(q.addAll(Arrays.asList(ints))); |
174 |
> |
for (int i = 0; i < SIZE; ++i) |
175 |
> |
assertEquals(ints[i], q.poll()); |
176 |
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} |
177 |
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|
178 |
|
/** |
179 |
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* addAll with too large an index throws IOOBE |
180 |
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*/ |
181 |
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public void testAddAll2_IndexOutOfBoundsException() { |
182 |
< |
try { |
183 |
< |
LinkedList l = new LinkedList(); |
184 |
< |
l.add(new Object()); |
185 |
< |
LinkedList m = new LinkedList(); |
186 |
< |
m.add(new Object()); |
187 |
< |
l.addAll(4,m); |
188 |
< |
shouldThrow(); |
189 |
< |
} catch(IndexOutOfBoundsException success) {} |
182 |
> |
LinkedList l = new LinkedList(); |
183 |
> |
l.add(new Object()); |
184 |
> |
LinkedList m = new LinkedList(); |
185 |
> |
m.add(new Object()); |
186 |
> |
try { |
187 |
> |
l.addAll(4,m); |
188 |
> |
shouldThrow(); |
189 |
> |
} catch (IndexOutOfBoundsException success) {} |
190 |
|
} |
191 |
|
|
192 |
|
/** |
193 |
|
* addAll with negative index throws IOOBE |
194 |
|
*/ |
195 |
|
public void testAddAll4_BadIndex() { |
196 |
< |
try { |
197 |
< |
LinkedList l = new LinkedList(); |
198 |
< |
l.add(new Object()); |
199 |
< |
LinkedList m = new LinkedList(); |
200 |
< |
m.add(new Object()); |
201 |
< |
l.addAll(-1,m); |
202 |
< |
shouldThrow(); |
203 |
< |
} catch(IndexOutOfBoundsException success){} |
196 |
> |
LinkedList l = new LinkedList(); |
197 |
> |
l.add(new Object()); |
198 |
> |
LinkedList m = new LinkedList(); |
199 |
> |
m.add(new Object()); |
200 |
> |
try { |
201 |
> |
l.addAll(-1,m); |
202 |
> |
shouldThrow(); |
203 |
> |
} catch (IndexOutOfBoundsException success) {} |
204 |
|
} |
205 |
|
|
206 |
|
/** |
207 |
< |
* poll succeeds unless empty |
207 |
> |
* poll succeeds unless empty |
208 |
|
*/ |
209 |
|
public void testPoll() { |
210 |
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LinkedList q = populatedQueue(SIZE); |
211 |
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for (int i = 0; i < SIZE; ++i) { |
212 |
< |
assertEquals(i, ((Integer)q.poll()).intValue()); |
212 |
> |
assertEquals(i, q.poll()); |
213 |
|
} |
214 |
< |
assertNull(q.poll()); |
214 |
> |
assertNull(q.poll()); |
215 |
|
} |
216 |
|
|
217 |
|
/** |
218 |
< |
* peek returns next element, or null if empty |
218 |
> |
* peek returns next element, or null if empty |
219 |
|
*/ |
220 |
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public void testPeek() { |
221 |
|
LinkedList q = populatedQueue(SIZE); |
222 |
|
for (int i = 0; i < SIZE; ++i) { |
223 |
< |
assertEquals(i, ((Integer)q.peek()).intValue()); |
224 |
< |
q.poll(); |
223 |
> |
assertEquals(i, q.peek()); |
224 |
> |
assertEquals(i, q.poll()); |
225 |
|
assertTrue(q.peek() == null || |
226 |
< |
i != ((Integer)q.peek()).intValue()); |
226 |
> |
!q.peek().equals(i)); |
227 |
|
} |
228 |
< |
assertNull(q.peek()); |
228 |
> |
assertNull(q.peek()); |
229 |
|
} |
230 |
|
|
231 |
|
/** |
234 |
|
public void testElement() { |
235 |
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LinkedList q = populatedQueue(SIZE); |
236 |
|
for (int i = 0; i < SIZE; ++i) { |
237 |
< |
assertEquals(i, ((Integer)q.element()).intValue()); |
238 |
< |
q.poll(); |
237 |
> |
assertEquals(i, q.element()); |
238 |
> |
assertEquals(i, q.poll()); |
239 |
|
} |
240 |
|
try { |
241 |
|
q.element(); |
242 |
|
shouldThrow(); |
243 |
< |
} |
227 |
< |
catch (NoSuchElementException success) {} |
243 |
> |
} catch (NoSuchElementException success) {} |
244 |
|
} |
245 |
|
|
246 |
|
/** |
247 |
< |
* remove removes next element, or throws NSEE if empty |
247 |
> |
* remove removes next element, or throws NSEE if empty |
248 |
|
*/ |
249 |
|
public void testRemove() { |
250 |
|
LinkedList q = populatedQueue(SIZE); |
251 |
|
for (int i = 0; i < SIZE; ++i) { |
252 |
< |
assertEquals(i, ((Integer)q.remove()).intValue()); |
252 |
> |
assertEquals(i, q.remove()); |
253 |
|
} |
254 |
|
try { |
255 |
|
q.remove(); |
256 |
|
shouldThrow(); |
257 |
< |
} catch (NoSuchElementException success){ |
242 |
< |
} |
257 |
> |
} catch (NoSuchElementException success) {} |
258 |
|
} |
259 |
|
|
260 |
|
/** |
262 |
|
*/ |
263 |
|
public void testRemoveElement() { |
264 |
|
LinkedList q = populatedQueue(SIZE); |
265 |
< |
for (int i = 1; i < SIZE; i+=2) { |
266 |
< |
assertTrue(q.remove(new Integer(i))); |
267 |
< |
} |
268 |
< |
for (int i = 0; i < SIZE; i+=2) { |
269 |
< |
assertTrue(q.remove(new Integer(i))); |
270 |
< |
assertFalse(q.remove(new Integer(i+1))); |
265 |
> |
for (int i = 1; i < SIZE; i += 2) { |
266 |
> |
assertTrue(q.contains(i)); |
267 |
> |
assertTrue(q.remove((Integer)i)); |
268 |
> |
assertFalse(q.contains(i)); |
269 |
> |
assertTrue(q.contains(i - 1)); |
270 |
> |
} |
271 |
> |
for (int i = 0; i < SIZE; i += 2) { |
272 |
> |
assertTrue(q.contains(i)); |
273 |
> |
assertTrue(q.remove((Integer)i)); |
274 |
> |
assertFalse(q.contains(i)); |
275 |
> |
assertFalse(q.remove((Integer)(i + 1))); |
276 |
> |
assertFalse(q.contains(i + 1)); |
277 |
|
} |
278 |
|
assertTrue(q.isEmpty()); |
279 |
|
} |
280 |
< |
|
280 |
> |
|
281 |
|
/** |
282 |
|
* contains(x) reports true when elements added but not yet removed |
283 |
|
*/ |
298 |
|
q.clear(); |
299 |
|
assertTrue(q.isEmpty()); |
300 |
|
assertEquals(0, q.size()); |
301 |
< |
q.add(new Integer(1)); |
301 |
> |
assertTrue(q.add(new Integer(1))); |
302 |
|
assertFalse(q.isEmpty()); |
303 |
|
q.clear(); |
304 |
|
assertTrue(q.isEmpty()); |
313 |
|
for (int i = 0; i < SIZE; ++i) { |
314 |
|
assertTrue(q.containsAll(p)); |
315 |
|
assertFalse(p.containsAll(q)); |
316 |
< |
p.add(new Integer(i)); |
316 |
> |
assertTrue(p.add(new Integer(i))); |
317 |
|
} |
318 |
|
assertTrue(p.containsAll(q)); |
319 |
|
} |
332 |
|
assertTrue(changed); |
333 |
|
|
334 |
|
assertTrue(q.containsAll(p)); |
335 |
< |
assertEquals(SIZE-i, q.size()); |
335 |
> |
assertEquals(SIZE - i, q.size()); |
336 |
|
p.remove(); |
337 |
|
} |
338 |
|
} |
345 |
|
LinkedList q = populatedQueue(SIZE); |
346 |
|
LinkedList p = populatedQueue(i); |
347 |
|
assertTrue(q.removeAll(p)); |
348 |
< |
assertEquals(SIZE-i, q.size()); |
348 |
> |
assertEquals(SIZE - i, q.size()); |
349 |
|
for (int j = 0; j < i; ++j) { |
350 |
< |
Integer I = (Integer)(p.remove()); |
351 |
< |
assertFalse(q.contains(I)); |
350 |
> |
Integer x = (Integer)(p.remove()); |
351 |
> |
assertFalse(q.contains(x)); |
352 |
|
} |
353 |
|
} |
354 |
|
} |
355 |
|
|
356 |
|
/** |
357 |
< |
* toArray contains all elements |
357 |
> |
* toArray contains all elements in FIFO order |
358 |
|
*/ |
359 |
|
public void testToArray() { |
360 |
|
LinkedList q = populatedQueue(SIZE); |
361 |
< |
Object[] o = q.toArray(); |
362 |
< |
Arrays.sort(o); |
363 |
< |
for(int i = 0; i < o.length; i++) |
364 |
< |
assertEquals(o[i], q.poll()); |
361 |
> |
Object[] a = q.toArray(); |
362 |
> |
assertSame(Object[].class, a.getClass()); |
363 |
> |
for (Object o : a) |
364 |
> |
assertSame(o, q.poll()); |
365 |
> |
assertTrue(q.isEmpty()); |
366 |
|
} |
367 |
|
|
368 |
|
/** |
369 |
< |
* toArray(a) contains all elements |
369 |
> |
* toArray(a) contains all elements in FIFO order |
370 |
|
*/ |
371 |
|
public void testToArray2() { |
372 |
< |
LinkedList q = populatedQueue(SIZE); |
373 |
< |
Integer[] ints = new Integer[SIZE]; |
374 |
< |
ints = (Integer[])q.toArray(ints); |
375 |
< |
Arrays.sort(ints); |
376 |
< |
for(int i = 0; i < ints.length; i++) |
377 |
< |
assertEquals(ints[i], q.poll()); |
372 |
> |
LinkedList<Integer> q = populatedQueue(SIZE); |
373 |
> |
Integer[] ints = new Integer[SIZE]; |
374 |
> |
Integer[] array = q.toArray(ints); |
375 |
> |
assertSame(ints, array); |
376 |
> |
for (Integer o : ints) |
377 |
> |
assertSame(o, q.poll()); |
378 |
> |
assertTrue(q.isEmpty()); |
379 |
|
} |
380 |
|
|
381 |
|
/** |
382 |
< |
* toArray(null) throws NPE |
382 |
> |
* toArray(null) throws NullPointerException |
383 |
|
*/ |
384 |
< |
public void testToArray_BadArg() { |
385 |
< |
try { |
386 |
< |
LinkedList l = new LinkedList(); |
387 |
< |
l.add(new Object()); |
388 |
< |
Object o[] = l.toArray(null); |
389 |
< |
shouldThrow(); |
390 |
< |
} catch(NullPointerException success){} |
384 |
> |
public void testToArray_NullArg() { |
385 |
> |
LinkedList l = new LinkedList(); |
386 |
> |
l.add(new Object()); |
387 |
> |
try { |
388 |
> |
l.toArray((Object[])null); |
389 |
> |
shouldThrow(); |
390 |
> |
} catch (NullPointerException success) {} |
391 |
|
} |
392 |
|
|
393 |
|
/** |
394 |
< |
* toArray with incompatable aray type throws CCE |
394 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
395 |
|
*/ |
396 |
|
public void testToArray1_BadArg() { |
397 |
< |
try { |
398 |
< |
LinkedList l = new LinkedList(); |
399 |
< |
l.add(new Integer(5)); |
400 |
< |
Object o[] = l.toArray(new String[10] ); |
401 |
< |
shouldThrow(); |
402 |
< |
} catch(ArrayStoreException success){} |
397 |
> |
LinkedList l = new LinkedList(); |
398 |
> |
l.add(new Integer(5)); |
399 |
> |
try { |
400 |
> |
l.toArray(new String[10]); |
401 |
> |
shouldThrow(); |
402 |
> |
} catch (ArrayStoreException success) {} |
403 |
|
} |
404 |
< |
|
404 |
> |
|
405 |
|
/** |
406 |
< |
* iterator iterates through all elements |
406 |
> |
* iterator iterates through all elements |
407 |
|
*/ |
408 |
|
public void testIterator() { |
409 |
|
LinkedList q = populatedQueue(SIZE); |
410 |
< |
int i = 0; |
411 |
< |
Iterator it = q.iterator(); |
412 |
< |
while(it.hasNext()) { |
410 |
> |
Iterator it = q.iterator(); |
411 |
> |
int i; |
412 |
> |
for (i = 0; it.hasNext(); i++) |
413 |
|
assertTrue(q.contains(it.next())); |
391 |
– |
++i; |
392 |
– |
} |
414 |
|
assertEquals(i, SIZE); |
415 |
+ |
assertIteratorExhausted(it); |
416 |
+ |
} |
417 |
+ |
|
418 |
+ |
/** |
419 |
+ |
* iterator of empty collection has no elements |
420 |
+ |
*/ |
421 |
+ |
public void testEmptyIterator() { |
422 |
+ |
assertIteratorExhausted(new LinkedList().iterator()); |
423 |
|
} |
424 |
|
|
425 |
|
/** |
426 |
< |
* iterator ordering is FIFO |
426 |
> |
* iterator ordering is FIFO |
427 |
|
*/ |
428 |
|
public void testIteratorOrdering() { |
429 |
|
final LinkedList q = new LinkedList(); |
432 |
|
q.add(new Integer(3)); |
433 |
|
int k = 0; |
434 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
435 |
< |
int i = ((Integer)(it.next())).intValue(); |
407 |
< |
assertEquals(++k, i); |
435 |
> |
assertEquals(++k, it.next()); |
436 |
|
} |
437 |
|
|
438 |
|
assertEquals(3, k); |
441 |
|
/** |
442 |
|
* iterator.remove removes current element |
443 |
|
*/ |
444 |
< |
public void testIteratorRemove () { |
444 |
> |
public void testIteratorRemove() { |
445 |
|
final LinkedList q = new LinkedList(); |
446 |
|
q.add(new Integer(1)); |
447 |
|
q.add(new Integer(2)); |
448 |
|
q.add(new Integer(3)); |
449 |
|
Iterator it = q.iterator(); |
450 |
< |
it.next(); |
450 |
> |
assertEquals(1, it.next()); |
451 |
|
it.remove(); |
452 |
|
it = q.iterator(); |
453 |
< |
assertEquals(it.next(), new Integer(2)); |
454 |
< |
assertEquals(it.next(), new Integer(3)); |
453 |
> |
assertEquals(2, it.next()); |
454 |
> |
assertEquals(3, it.next()); |
455 |
|
assertFalse(it.hasNext()); |
456 |
|
} |
457 |
|
|
458 |
|
/** |
459 |
< |
* Descending iterator iterates through all elements |
459 |
> |
* Descending iterator iterates through all elements |
460 |
|
*/ |
461 |
|
public void testDescendingIterator() { |
462 |
|
LinkedList q = populatedQueue(SIZE); |
463 |
|
int i = 0; |
464 |
< |
Iterator it = q.descendingIterator(); |
465 |
< |
while(it.hasNext()) { |
464 |
> |
Iterator it = q.descendingIterator(); |
465 |
> |
while (it.hasNext()) { |
466 |
|
assertTrue(q.contains(it.next())); |
467 |
|
++i; |
468 |
|
} |
470 |
|
assertFalse(it.hasNext()); |
471 |
|
try { |
472 |
|
it.next(); |
473 |
< |
} catch(NoSuchElementException success) { |
474 |
< |
} |
473 |
> |
shouldThrow(); |
474 |
> |
} catch (NoSuchElementException success) {} |
475 |
|
} |
476 |
|
|
477 |
|
/** |
478 |
< |
* Descending iterator ordering is reverse FIFO |
478 |
> |
* Descending iterator ordering is reverse FIFO |
479 |
|
*/ |
480 |
|
public void testDescendingIteratorOrdering() { |
481 |
|
final LinkedList q = new LinkedList(); |
484 |
|
q.add(new Integer(1)); |
485 |
|
int k = 0; |
486 |
|
for (Iterator it = q.descendingIterator(); it.hasNext();) { |
487 |
< |
int i = ((Integer)(it.next())).intValue(); |
460 |
< |
assertEquals(++k, i); |
487 |
> |
assertEquals(++k, it.next()); |
488 |
|
} |
489 |
|
|
490 |
|
assertEquals(3, k); |
493 |
|
/** |
494 |
|
* descendingIterator.remove removes current element |
495 |
|
*/ |
496 |
< |
public void testDescendingIteratorRemove () { |
496 |
> |
public void testDescendingIteratorRemove() { |
497 |
|
final LinkedList q = new LinkedList(); |
498 |
< |
q.add(new Integer(3)); |
499 |
< |
q.add(new Integer(2)); |
500 |
< |
q.add(new Integer(1)); |
498 |
> |
q.add(three); |
499 |
> |
q.add(two); |
500 |
> |
q.add(one); |
501 |
|
Iterator it = q.descendingIterator(); |
502 |
|
it.next(); |
503 |
|
it.remove(); |
504 |
|
it = q.descendingIterator(); |
505 |
< |
assertEquals(it.next(), new Integer(2)); |
506 |
< |
assertEquals(it.next(), new Integer(3)); |
505 |
> |
assertSame(it.next(), two); |
506 |
> |
assertSame(it.next(), three); |
507 |
|
assertFalse(it.hasNext()); |
508 |
|
} |
509 |
|
|
483 |
– |
|
510 |
|
/** |
511 |
|
* toString contains toStrings of elements |
512 |
|
*/ |
514 |
|
LinkedList q = populatedQueue(SIZE); |
515 |
|
String s = q.toString(); |
516 |
|
for (int i = 0; i < SIZE; ++i) { |
517 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
517 |
> |
assertTrue(s.contains(String.valueOf(i))); |
518 |
|
} |
519 |
< |
} |
519 |
> |
} |
520 |
|
|
521 |
|
/** |
522 |
|
* peek returns element inserted with addFirst |
523 |
|
*/ |
524 |
|
public void testAddFirst() { |
525 |
|
LinkedList q = populatedQueue(3); |
526 |
< |
q.addFirst(four); |
527 |
< |
assertEquals(four,q.peek()); |
528 |
< |
} |
526 |
> |
q.addFirst(four); |
527 |
> |
assertSame(four, q.peek()); |
528 |
> |
} |
529 |
|
|
530 |
|
/** |
531 |
|
* peekFirst returns element inserted with push |
532 |
|
*/ |
533 |
|
public void testPush() { |
534 |
|
LinkedList q = populatedQueue(3); |
535 |
< |
q.pollLast(); |
536 |
< |
q.push(four); |
537 |
< |
assertEquals(four,q.peekFirst()); |
512 |
< |
} |
535 |
> |
q.push(four); |
536 |
> |
assertSame(four, q.peekFirst()); |
537 |
> |
} |
538 |
|
|
539 |
|
/** |
540 |
< |
* pop removes next element, or throws NSEE if empty |
540 |
> |
* pop removes next element, or throws NSEE if empty |
541 |
|
*/ |
542 |
|
public void testPop() { |
543 |
|
LinkedList q = populatedQueue(SIZE); |
544 |
|
for (int i = 0; i < SIZE; ++i) { |
545 |
< |
assertEquals(i, ((Integer)q.pop()).intValue()); |
545 |
> |
assertEquals(i, q.pop()); |
546 |
|
} |
547 |
|
try { |
548 |
|
q.pop(); |
549 |
|
shouldThrow(); |
550 |
< |
} catch (NoSuchElementException success){ |
526 |
< |
} |
550 |
> |
} catch (NoSuchElementException success) {} |
551 |
|
} |
552 |
|
|
553 |
|
/** |
554 |
< |
* OfferFirst succeeds |
554 |
> |
* OfferFirst succeeds |
555 |
|
*/ |
556 |
|
public void testOfferFirst() { |
557 |
|
LinkedList q = new LinkedList(); |
560 |
|
} |
561 |
|
|
562 |
|
/** |
563 |
< |
* OfferLast succeeds |
563 |
> |
* OfferLast succeeds |
564 |
|
*/ |
565 |
|
public void testOfferLast() { |
566 |
|
LinkedList q = new LinkedList(); |
569 |
|
} |
570 |
|
|
571 |
|
/** |
572 |
< |
* pollLast succeeds unless empty |
572 |
> |
* pollLast succeeds unless empty |
573 |
|
*/ |
574 |
|
public void testPollLast() { |
575 |
|
LinkedList q = populatedQueue(SIZE); |
576 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
577 |
< |
assertEquals(i, ((Integer)q.pollLast()).intValue()); |
576 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
577 |
> |
assertEquals(i, q.pollLast()); |
578 |
|
} |
579 |
< |
assertNull(q.pollLast()); |
579 |
> |
assertNull(q.pollLast()); |
580 |
|
} |
581 |
|
|
582 |
|
/** |
583 |
< |
* peekFirst returns next element, or null if empty |
583 |
> |
* peekFirst returns next element, or null if empty |
584 |
|
*/ |
585 |
|
public void testPeekFirst() { |
586 |
|
LinkedList q = populatedQueue(SIZE); |
587 |
|
for (int i = 0; i < SIZE; ++i) { |
588 |
< |
assertEquals(i, ((Integer)q.peekFirst()).intValue()); |
589 |
< |
q.pollFirst(); |
588 |
> |
assertEquals(i, q.peekFirst()); |
589 |
> |
assertEquals(i, q.pollFirst()); |
590 |
|
assertTrue(q.peekFirst() == null || |
591 |
< |
i != ((Integer)q.peekFirst()).intValue()); |
591 |
> |
!q.peekFirst().equals(i)); |
592 |
|
} |
593 |
< |
assertNull(q.peekFirst()); |
593 |
> |
assertNull(q.peekFirst()); |
594 |
|
} |
595 |
|
|
572 |
– |
|
596 |
|
/** |
597 |
< |
* peekLast returns next element, or null if empty |
597 |
> |
* peekLast returns next element, or null if empty |
598 |
|
*/ |
599 |
|
public void testPeekLast() { |
600 |
|
LinkedList q = populatedQueue(SIZE); |
601 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
602 |
< |
assertEquals(i, ((Integer)q.peekLast()).intValue()); |
603 |
< |
q.pollLast(); |
601 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
602 |
> |
assertEquals(i, q.peekLast()); |
603 |
> |
assertEquals(i, q.pollLast()); |
604 |
|
assertTrue(q.peekLast() == null || |
605 |
< |
i != ((Integer)q.peekLast()).intValue()); |
605 |
> |
!q.peekLast().equals(i)); |
606 |
|
} |
607 |
< |
assertNull(q.peekLast()); |
607 |
> |
assertNull(q.peekLast()); |
608 |
|
} |
609 |
|
|
610 |
|
public void testFirstElement() { |
611 |
|
LinkedList q = populatedQueue(SIZE); |
612 |
|
for (int i = 0; i < SIZE; ++i) { |
613 |
< |
assertEquals(i, ((Integer)q.getFirst()).intValue()); |
614 |
< |
q.pollFirst(); |
613 |
> |
assertEquals(i, q.getFirst()); |
614 |
> |
assertEquals(i, q.pollFirst()); |
615 |
|
} |
616 |
|
try { |
617 |
|
q.getFirst(); |
618 |
|
shouldThrow(); |
619 |
< |
} |
597 |
< |
catch (NoSuchElementException success) {} |
619 |
> |
} catch (NoSuchElementException success) {} |
620 |
|
} |
621 |
|
|
622 |
|
/** |
623 |
< |
* getLast returns next element, or throws NSEE if empty |
623 |
> |
* getLast returns next element, or throws NSEE if empty |
624 |
|
*/ |
625 |
|
public void testLastElement() { |
626 |
|
LinkedList q = populatedQueue(SIZE); |
627 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
628 |
< |
assertEquals(i, ((Integer)q.getLast()).intValue()); |
629 |
< |
q.pollLast(); |
627 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
628 |
> |
assertEquals(i, q.getLast()); |
629 |
> |
assertEquals(i, q.pollLast()); |
630 |
|
} |
631 |
|
try { |
632 |
|
q.getLast(); |
633 |
|
shouldThrow(); |
634 |
< |
} |
635 |
< |
catch (NoSuchElementException success) {} |
614 |
< |
assertNull(q.peekLast()); |
634 |
> |
} catch (NoSuchElementException success) {} |
635 |
> |
assertNull(q.peekLast()); |
636 |
|
} |
637 |
|
|
638 |
|
/** |
640 |
|
*/ |
641 |
|
public void testRemoveFirstOccurrence() { |
642 |
|
LinkedList q = populatedQueue(SIZE); |
643 |
< |
for (int i = 1; i < SIZE; i+=2) { |
643 |
> |
for (int i = 1; i < SIZE; i += 2) { |
644 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
645 |
|
} |
646 |
< |
for (int i = 0; i < SIZE; i+=2) { |
646 |
> |
for (int i = 0; i < SIZE; i += 2) { |
647 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
648 |
< |
assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
648 |
> |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
649 |
|
} |
650 |
|
assertTrue(q.isEmpty()); |
651 |
|
} |
655 |
|
*/ |
656 |
|
public void testRemoveLastOccurrence() { |
657 |
|
LinkedList q = populatedQueue(SIZE); |
658 |
< |
for (int i = 1; i < SIZE; i+=2) { |
658 |
> |
for (int i = 1; i < SIZE; i += 2) { |
659 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
660 |
|
} |
661 |
< |
for (int i = 0; i < SIZE; i+=2) { |
661 |
> |
for (int i = 0; i < SIZE; i += 2) { |
662 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
663 |
< |
assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
663 |
> |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
664 |
|
} |
665 |
|
assertTrue(q.isEmpty()); |
666 |
|
} |