1 |
dl |
1.1 |
/* |
2 |
dl |
1.8 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
|
|
* Expert Group and released to the public domain, as explained at |
4 |
jsr166 |
1.21 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
jsr166 |
1.9 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
|
|
* Pat Fisher, Mike Judd. |
7 |
dl |
1.1 |
*/ |
8 |
|
|
|
9 |
jsr166 |
1.23 |
import java.util.Arrays; |
10 |
|
|
import java.util.Collection; |
11 |
|
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import java.util.Comparator; |
12 |
|
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import java.util.Iterator; |
13 |
|
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import java.util.NoSuchElementException; |
14 |
|
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import java.util.PriorityQueue; |
15 |
|
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import java.util.Queue; |
16 |
dl |
1.1 |
|
17 |
jsr166 |
1.27 |
import junit.framework.Test; |
18 |
|
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import junit.framework.TestSuite; |
19 |
|
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|
20 |
dl |
1.3 |
public class PriorityQueueTest extends JSR166TestCase { |
21 |
dl |
1.1 |
public static void main(String[] args) { |
22 |
jsr166 |
1.33 |
main(suite(), args); |
23 |
dl |
1.1 |
} |
24 |
|
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public static Test suite() { |
25 |
jsr166 |
1.39 |
class Implementation implements CollectionImplementation { |
26 |
|
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public Class<?> klazz() { return PriorityQueue.class; } |
27 |
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public Collection emptyCollection() { return new PriorityQueue(); } |
28 |
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public Object makeElement(int i) { return i; } |
29 |
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public boolean isConcurrent() { return false; } |
30 |
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public boolean permitsNulls() { return false; } |
31 |
|
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} |
32 |
|
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return newTestSuite(PriorityQueueTest.class, |
33 |
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CollectionTest.testSuite(new Implementation())); |
34 |
dl |
1.1 |
} |
35 |
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|
36 |
jsr166 |
1.9 |
static class MyReverseComparator implements Comparator { |
37 |
dl |
1.1 |
public int compare(Object x, Object y) { |
38 |
jsr166 |
1.15 |
return ((Comparable)y).compareTo(x); |
39 |
dl |
1.1 |
} |
40 |
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} |
41 |
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|
42 |
|
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/** |
43 |
jsr166 |
1.25 |
* Returns a new queue of given size containing consecutive |
44 |
jsr166 |
1.38 |
* Integers 0 ... n - 1. |
45 |
dl |
1.1 |
*/ |
46 |
jsr166 |
1.19 |
private PriorityQueue<Integer> populatedQueue(int n) { |
47 |
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PriorityQueue<Integer> q = new PriorityQueue<Integer>(n); |
48 |
dl |
1.1 |
assertTrue(q.isEmpty()); |
49 |
jsr166 |
1.36 |
for (int i = n - 1; i >= 0; i -= 2) |
50 |
jsr166 |
1.12 |
assertTrue(q.offer(new Integer(i))); |
51 |
jsr166 |
1.28 |
for (int i = (n & 1); i < n; i += 2) |
52 |
jsr166 |
1.12 |
assertTrue(q.offer(new Integer(i))); |
53 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
54 |
jsr166 |
1.12 |
assertEquals(n, q.size()); |
55 |
jsr166 |
1.38 |
assertEquals((Integer) 0, q.peek()); |
56 |
dl |
1.1 |
return q; |
57 |
|
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} |
58 |
jsr166 |
1.9 |
|
59 |
dl |
1.5 |
/** |
60 |
dl |
1.6 |
* A new queue has unbounded capacity |
61 |
dl |
1.5 |
*/ |
62 |
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public void testConstructor1() { |
63 |
dl |
1.3 |
assertEquals(0, new PriorityQueue(SIZE).size()); |
64 |
dl |
1.1 |
} |
65 |
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|
66 |
dl |
1.5 |
/** |
67 |
jsr166 |
1.13 |
* Constructor throws IAE if capacity argument nonpositive |
68 |
dl |
1.5 |
*/ |
69 |
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public void testConstructor2() { |
70 |
dl |
1.1 |
try { |
71 |
jsr166 |
1.31 |
new PriorityQueue(0); |
72 |
dl |
1.5 |
shouldThrow(); |
73 |
jsr166 |
1.13 |
} catch (IllegalArgumentException success) {} |
74 |
dl |
1.1 |
} |
75 |
|
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|
76 |
dl |
1.5 |
/** |
77 |
dl |
1.6 |
* Initializing from null Collection throws NPE |
78 |
dl |
1.5 |
*/ |
79 |
dl |
1.1 |
public void testConstructor3() { |
80 |
|
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try { |
81 |
jsr166 |
1.31 |
new PriorityQueue((Collection)null); |
82 |
dl |
1.5 |
shouldThrow(); |
83 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
84 |
dl |
1.1 |
} |
85 |
|
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|
86 |
dl |
1.5 |
/** |
87 |
dl |
1.6 |
* Initializing from Collection of null elements throws NPE |
88 |
dl |
1.5 |
*/ |
89 |
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public void testConstructor4() { |
90 |
dl |
1.1 |
try { |
91 |
jsr166 |
1.34 |
new PriorityQueue(Arrays.asList(new Integer[SIZE])); |
92 |
dl |
1.5 |
shouldThrow(); |
93 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
94 |
dl |
1.1 |
} |
95 |
|
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|
96 |
dl |
1.5 |
/** |
97 |
dl |
1.6 |
* Initializing from Collection with some null elements throws NPE |
98 |
dl |
1.5 |
*/ |
99 |
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public void testConstructor5() { |
100 |
jsr166 |
1.34 |
Integer[] ints = new Integer[SIZE]; |
101 |
jsr166 |
1.35 |
for (int i = 0; i < SIZE - 1; ++i) |
102 |
jsr166 |
1.34 |
ints[i] = new Integer(i); |
103 |
dl |
1.1 |
try { |
104 |
jsr166 |
1.31 |
new PriorityQueue(Arrays.asList(ints)); |
105 |
dl |
1.5 |
shouldThrow(); |
106 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
107 |
dl |
1.1 |
} |
108 |
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|
109 |
dl |
1.5 |
/** |
110 |
dl |
1.6 |
* Queue contains all elements of collection used to initialize |
111 |
dl |
1.5 |
*/ |
112 |
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public void testConstructor6() { |
113 |
jsr166 |
1.14 |
Integer[] ints = new Integer[SIZE]; |
114 |
|
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for (int i = 0; i < SIZE; ++i) |
115 |
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ints[i] = new Integer(i); |
116 |
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PriorityQueue q = new PriorityQueue(Arrays.asList(ints)); |
117 |
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for (int i = 0; i < SIZE; ++i) |
118 |
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assertEquals(ints[i], q.poll()); |
119 |
dl |
1.1 |
} |
120 |
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|
121 |
dl |
1.5 |
/** |
122 |
dl |
1.6 |
* The comparator used in constructor is used |
123 |
dl |
1.5 |
*/ |
124 |
|
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public void testConstructor7() { |
125 |
jsr166 |
1.14 |
MyReverseComparator cmp = new MyReverseComparator(); |
126 |
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PriorityQueue q = new PriorityQueue(SIZE, cmp); |
127 |
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assertEquals(cmp, q.comparator()); |
128 |
|
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Integer[] ints = new Integer[SIZE]; |
129 |
|
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for (int i = 0; i < SIZE; ++i) |
130 |
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ints[i] = new Integer(i); |
131 |
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q.addAll(Arrays.asList(ints)); |
132 |
jsr166 |
1.35 |
for (int i = SIZE - 1; i >= 0; --i) |
133 |
jsr166 |
1.14 |
assertEquals(ints[i], q.poll()); |
134 |
dl |
1.1 |
} |
135 |
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|
136 |
dl |
1.5 |
/** |
137 |
dl |
1.6 |
* isEmpty is true before add, false after |
138 |
dl |
1.5 |
*/ |
139 |
dl |
1.1 |
public void testEmpty() { |
140 |
|
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PriorityQueue q = new PriorityQueue(2); |
141 |
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assertTrue(q.isEmpty()); |
142 |
|
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q.add(new Integer(1)); |
143 |
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assertFalse(q.isEmpty()); |
144 |
|
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q.add(new Integer(2)); |
145 |
|
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q.remove(); |
146 |
|
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q.remove(); |
147 |
|
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assertTrue(q.isEmpty()); |
148 |
|
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} |
149 |
|
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|
150 |
dl |
1.5 |
/** |
151 |
dl |
1.6 |
* size changes when elements added and removed |
152 |
dl |
1.5 |
*/ |
153 |
dl |
1.1 |
public void testSize() { |
154 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
155 |
|
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for (int i = 0; i < SIZE; ++i) { |
156 |
jsr166 |
1.35 |
assertEquals(SIZE - i, q.size()); |
157 |
dl |
1.1 |
q.remove(); |
158 |
|
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} |
159 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
160 |
dl |
1.1 |
assertEquals(i, q.size()); |
161 |
|
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q.add(new Integer(i)); |
162 |
|
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} |
163 |
|
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} |
164 |
|
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|
165 |
dl |
1.5 |
/** |
166 |
dl |
1.6 |
* offer(null) throws NPE |
167 |
dl |
1.5 |
*/ |
168 |
|
|
public void testOfferNull() { |
169 |
jsr166 |
1.34 |
PriorityQueue q = new PriorityQueue(1); |
170 |
jsr166 |
1.12 |
try { |
171 |
dl |
1.1 |
q.offer(null); |
172 |
dl |
1.5 |
shouldThrow(); |
173 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
174 |
dl |
1.1 |
} |
175 |
|
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|
176 |
dl |
1.5 |
/** |
177 |
dl |
1.7 |
* add(null) throws NPE |
178 |
|
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*/ |
179 |
|
|
public void testAddNull() { |
180 |
jsr166 |
1.34 |
PriorityQueue q = new PriorityQueue(1); |
181 |
jsr166 |
1.12 |
try { |
182 |
dl |
1.7 |
q.add(null); |
183 |
|
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shouldThrow(); |
184 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
185 |
dl |
1.7 |
} |
186 |
|
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|
187 |
|
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/** |
188 |
dl |
1.6 |
* Offer of comparable element succeeds |
189 |
dl |
1.5 |
*/ |
190 |
dl |
1.1 |
public void testOffer() { |
191 |
|
|
PriorityQueue q = new PriorityQueue(1); |
192 |
dl |
1.6 |
assertTrue(q.offer(zero)); |
193 |
|
|
assertTrue(q.offer(one)); |
194 |
dl |
1.1 |
} |
195 |
|
|
|
196 |
dl |
1.5 |
/** |
197 |
dl |
1.6 |
* Offer of non-Comparable throws CCE |
198 |
dl |
1.5 |
*/ |
199 |
dl |
1.1 |
public void testOfferNonComparable() { |
200 |
jsr166 |
1.32 |
PriorityQueue q = new PriorityQueue(1); |
201 |
dl |
1.1 |
try { |
202 |
|
|
q.offer(new Object()); |
203 |
dl |
1.5 |
shouldThrow(); |
204 |
jsr166 |
1.37 |
} catch (ClassCastException success) { |
205 |
|
|
assertTrue(q.isEmpty()); |
206 |
|
|
assertEquals(0, q.size()); |
207 |
|
|
assertNull(q.poll()); |
208 |
|
|
} |
209 |
dl |
1.1 |
} |
210 |
|
|
|
211 |
dl |
1.5 |
/** |
212 |
dl |
1.6 |
* add of comparable succeeds |
213 |
dl |
1.5 |
*/ |
214 |
|
|
public void testAdd() { |
215 |
dl |
1.3 |
PriorityQueue q = new PriorityQueue(SIZE); |
216 |
|
|
for (int i = 0; i < SIZE; ++i) { |
217 |
dl |
1.1 |
assertEquals(i, q.size()); |
218 |
|
|
assertTrue(q.add(new Integer(i))); |
219 |
|
|
} |
220 |
|
|
} |
221 |
|
|
|
222 |
dl |
1.5 |
/** |
223 |
dl |
1.6 |
* addAll(null) throws NPE |
224 |
dl |
1.5 |
*/ |
225 |
|
|
public void testAddAll1() { |
226 |
jsr166 |
1.34 |
PriorityQueue q = new PriorityQueue(1); |
227 |
dl |
1.1 |
try { |
228 |
|
|
q.addAll(null); |
229 |
dl |
1.5 |
shouldThrow(); |
230 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
231 |
dl |
1.1 |
} |
232 |
jsr166 |
1.17 |
|
233 |
dl |
1.5 |
/** |
234 |
dl |
1.6 |
* addAll of a collection with null elements throws NPE |
235 |
dl |
1.5 |
*/ |
236 |
|
|
public void testAddAll2() { |
237 |
jsr166 |
1.34 |
PriorityQueue q = new PriorityQueue(SIZE); |
238 |
dl |
1.1 |
try { |
239 |
jsr166 |
1.34 |
q.addAll(Arrays.asList(new Integer[SIZE])); |
240 |
dl |
1.5 |
shouldThrow(); |
241 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
242 |
dl |
1.1 |
} |
243 |
jsr166 |
1.17 |
|
244 |
dl |
1.5 |
/** |
245 |
dl |
1.6 |
* addAll of a collection with any null elements throws NPE after |
246 |
|
|
* possibly adding some elements |
247 |
dl |
1.5 |
*/ |
248 |
|
|
public void testAddAll3() { |
249 |
jsr166 |
1.34 |
PriorityQueue q = new PriorityQueue(SIZE); |
250 |
|
|
Integer[] ints = new Integer[SIZE]; |
251 |
jsr166 |
1.35 |
for (int i = 0; i < SIZE - 1; ++i) |
252 |
jsr166 |
1.34 |
ints[i] = new Integer(i); |
253 |
dl |
1.1 |
try { |
254 |
|
|
q.addAll(Arrays.asList(ints)); |
255 |
dl |
1.5 |
shouldThrow(); |
256 |
jsr166 |
1.13 |
} catch (NullPointerException success) {} |
257 |
dl |
1.1 |
} |
258 |
|
|
|
259 |
dl |
1.5 |
/** |
260 |
dl |
1.6 |
* Queue contains all elements of successful addAll |
261 |
dl |
1.5 |
*/ |
262 |
|
|
public void testAddAll5() { |
263 |
jsr166 |
1.14 |
Integer[] empty = new Integer[0]; |
264 |
|
|
Integer[] ints = new Integer[SIZE]; |
265 |
|
|
for (int i = 0; i < SIZE; ++i) |
266 |
jsr166 |
1.35 |
ints[i] = new Integer(SIZE - 1 - i); |
267 |
jsr166 |
1.14 |
PriorityQueue q = new PriorityQueue(SIZE); |
268 |
|
|
assertFalse(q.addAll(Arrays.asList(empty))); |
269 |
|
|
assertTrue(q.addAll(Arrays.asList(ints))); |
270 |
|
|
for (int i = 0; i < SIZE; ++i) |
271 |
|
|
assertEquals(new Integer(i), q.poll()); |
272 |
dl |
1.1 |
} |
273 |
|
|
|
274 |
dl |
1.5 |
/** |
275 |
dl |
1.6 |
* poll succeeds unless empty |
276 |
dl |
1.5 |
*/ |
277 |
|
|
public void testPoll() { |
278 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
279 |
|
|
for (int i = 0; i < SIZE; ++i) { |
280 |
jsr166 |
1.15 |
assertEquals(i, q.poll()); |
281 |
dl |
1.1 |
} |
282 |
jsr166 |
1.12 |
assertNull(q.poll()); |
283 |
dl |
1.1 |
} |
284 |
|
|
|
285 |
dl |
1.5 |
/** |
286 |
dl |
1.6 |
* peek returns next element, or null if empty |
287 |
dl |
1.5 |
*/ |
288 |
|
|
public void testPeek() { |
289 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
290 |
|
|
for (int i = 0; i < SIZE; ++i) { |
291 |
jsr166 |
1.15 |
assertEquals(i, q.peek()); |
292 |
|
|
assertEquals(i, q.poll()); |
293 |
dl |
1.1 |
assertTrue(q.peek() == null || |
294 |
jsr166 |
1.15 |
!q.peek().equals(i)); |
295 |
dl |
1.1 |
} |
296 |
jsr166 |
1.12 |
assertNull(q.peek()); |
297 |
dl |
1.1 |
} |
298 |
|
|
|
299 |
dl |
1.5 |
/** |
300 |
dl |
1.6 |
* element returns next element, or throws NSEE if empty |
301 |
dl |
1.5 |
*/ |
302 |
|
|
public void testElement() { |
303 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
304 |
|
|
for (int i = 0; i < SIZE; ++i) { |
305 |
jsr166 |
1.15 |
assertEquals(i, q.element()); |
306 |
|
|
assertEquals(i, q.poll()); |
307 |
dl |
1.1 |
} |
308 |
|
|
try { |
309 |
|
|
q.element(); |
310 |
dl |
1.5 |
shouldThrow(); |
311 |
jsr166 |
1.13 |
} catch (NoSuchElementException success) {} |
312 |
dl |
1.1 |
} |
313 |
|
|
|
314 |
dl |
1.5 |
/** |
315 |
dl |
1.6 |
* remove removes next element, or throws NSEE if empty |
316 |
dl |
1.5 |
*/ |
317 |
|
|
public void testRemove() { |
318 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
319 |
|
|
for (int i = 0; i < SIZE; ++i) { |
320 |
jsr166 |
1.15 |
assertEquals(i, q.remove()); |
321 |
dl |
1.1 |
} |
322 |
|
|
try { |
323 |
|
|
q.remove(); |
324 |
dl |
1.5 |
shouldThrow(); |
325 |
jsr166 |
1.13 |
} catch (NoSuchElementException success) {} |
326 |
dl |
1.1 |
} |
327 |
|
|
|
328 |
dl |
1.5 |
/** |
329 |
dl |
1.6 |
* remove(x) removes x and returns true if present |
330 |
dl |
1.5 |
*/ |
331 |
|
|
public void testRemoveElement() { |
332 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
333 |
jsr166 |
1.28 |
for (int i = 1; i < SIZE; i += 2) { |
334 |
jsr166 |
1.20 |
assertTrue(q.contains(i)); |
335 |
|
|
assertTrue(q.remove(i)); |
336 |
|
|
assertFalse(q.contains(i)); |
337 |
jsr166 |
1.36 |
assertTrue(q.contains(i - 1)); |
338 |
dl |
1.1 |
} |
339 |
jsr166 |
1.28 |
for (int i = 0; i < SIZE; i += 2) { |
340 |
jsr166 |
1.20 |
assertTrue(q.contains(i)); |
341 |
|
|
assertTrue(q.remove(i)); |
342 |
|
|
assertFalse(q.contains(i)); |
343 |
jsr166 |
1.36 |
assertFalse(q.remove(i + 1)); |
344 |
|
|
assertFalse(q.contains(i + 1)); |
345 |
dl |
1.1 |
} |
346 |
dl |
1.2 |
assertTrue(q.isEmpty()); |
347 |
dl |
1.1 |
} |
348 |
jsr166 |
1.9 |
|
349 |
dl |
1.5 |
/** |
350 |
dl |
1.6 |
* contains(x) reports true when elements added but not yet removed |
351 |
dl |
1.5 |
*/ |
352 |
|
|
public void testContains() { |
353 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
354 |
|
|
for (int i = 0; i < SIZE; ++i) { |
355 |
dl |
1.1 |
assertTrue(q.contains(new Integer(i))); |
356 |
|
|
q.poll(); |
357 |
|
|
assertFalse(q.contains(new Integer(i))); |
358 |
|
|
} |
359 |
|
|
} |
360 |
|
|
|
361 |
dl |
1.5 |
/** |
362 |
dl |
1.6 |
* clear removes all elements |
363 |
dl |
1.5 |
*/ |
364 |
|
|
public void testClear() { |
365 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
366 |
dl |
1.1 |
q.clear(); |
367 |
|
|
assertTrue(q.isEmpty()); |
368 |
|
|
assertEquals(0, q.size()); |
369 |
|
|
q.add(new Integer(1)); |
370 |
|
|
assertFalse(q.isEmpty()); |
371 |
|
|
q.clear(); |
372 |
|
|
assertTrue(q.isEmpty()); |
373 |
|
|
} |
374 |
|
|
|
375 |
dl |
1.5 |
/** |
376 |
dl |
1.6 |
* containsAll(c) is true when c contains a subset of elements |
377 |
dl |
1.5 |
*/ |
378 |
|
|
public void testContainsAll() { |
379 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
380 |
|
|
PriorityQueue p = new PriorityQueue(SIZE); |
381 |
|
|
for (int i = 0; i < SIZE; ++i) { |
382 |
dl |
1.1 |
assertTrue(q.containsAll(p)); |
383 |
|
|
assertFalse(p.containsAll(q)); |
384 |
|
|
p.add(new Integer(i)); |
385 |
|
|
} |
386 |
|
|
assertTrue(p.containsAll(q)); |
387 |
|
|
} |
388 |
|
|
|
389 |
dl |
1.5 |
/** |
390 |
dl |
1.6 |
* retainAll(c) retains only those elements of c and reports true if changed |
391 |
dl |
1.5 |
*/ |
392 |
|
|
public void testRetainAll() { |
393 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
394 |
|
|
PriorityQueue p = populatedQueue(SIZE); |
395 |
|
|
for (int i = 0; i < SIZE; ++i) { |
396 |
dl |
1.1 |
boolean changed = q.retainAll(p); |
397 |
|
|
if (i == 0) |
398 |
|
|
assertFalse(changed); |
399 |
|
|
else |
400 |
|
|
assertTrue(changed); |
401 |
|
|
|
402 |
|
|
assertTrue(q.containsAll(p)); |
403 |
jsr166 |
1.35 |
assertEquals(SIZE - i, q.size()); |
404 |
dl |
1.1 |
p.remove(); |
405 |
|
|
} |
406 |
|
|
} |
407 |
|
|
|
408 |
dl |
1.5 |
/** |
409 |
dl |
1.6 |
* removeAll(c) removes only those elements of c and reports true if changed |
410 |
dl |
1.5 |
*/ |
411 |
|
|
public void testRemoveAll() { |
412 |
dl |
1.3 |
for (int i = 1; i < SIZE; ++i) { |
413 |
|
|
PriorityQueue q = populatedQueue(SIZE); |
414 |
|
|
PriorityQueue p = populatedQueue(i); |
415 |
dl |
1.1 |
assertTrue(q.removeAll(p)); |
416 |
jsr166 |
1.35 |
assertEquals(SIZE - i, q.size()); |
417 |
dl |
1.1 |
for (int j = 0; j < i; ++j) { |
418 |
jsr166 |
1.29 |
Integer x = (Integer)(p.remove()); |
419 |
|
|
assertFalse(q.contains(x)); |
420 |
dl |
1.1 |
} |
421 |
|
|
} |
422 |
|
|
} |
423 |
|
|
|
424 |
dl |
1.5 |
/** |
425 |
dl |
1.6 |
* toArray contains all elements |
426 |
dl |
1.5 |
*/ |
427 |
|
|
public void testToArray() { |
428 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
429 |
jsr166 |
1.12 |
Object[] o = q.toArray(); |
430 |
dl |
1.1 |
Arrays.sort(o); |
431 |
jsr166 |
1.12 |
for (int i = 0; i < o.length; i++) |
432 |
jsr166 |
1.18 |
assertSame(o[i], q.poll()); |
433 |
dl |
1.1 |
} |
434 |
|
|
|
435 |
dl |
1.5 |
/** |
436 |
dl |
1.6 |
* toArray(a) contains all elements |
437 |
dl |
1.5 |
*/ |
438 |
|
|
public void testToArray2() { |
439 |
jsr166 |
1.19 |
PriorityQueue<Integer> q = populatedQueue(SIZE); |
440 |
jsr166 |
1.12 |
Integer[] ints = new Integer[SIZE]; |
441 |
jsr166 |
1.19 |
Integer[] array = q.toArray(ints); |
442 |
|
|
assertSame(ints, array); |
443 |
dl |
1.1 |
Arrays.sort(ints); |
444 |
jsr166 |
1.10 |
for (int i = 0; i < ints.length; i++) |
445 |
jsr166 |
1.18 |
assertSame(ints[i], q.poll()); |
446 |
dl |
1.1 |
} |
447 |
jsr166 |
1.9 |
|
448 |
dl |
1.5 |
/** |
449 |
dl |
1.6 |
* iterator iterates through all elements |
450 |
dl |
1.5 |
*/ |
451 |
|
|
public void testIterator() { |
452 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
453 |
jsr166 |
1.12 |
Iterator it = q.iterator(); |
454 |
jsr166 |
1.30 |
int i; |
455 |
|
|
for (i = 0; it.hasNext(); i++) |
456 |
dl |
1.1 |
assertTrue(q.contains(it.next())); |
457 |
dl |
1.3 |
assertEquals(i, SIZE); |
458 |
jsr166 |
1.30 |
assertIteratorExhausted(it); |
459 |
|
|
} |
460 |
|
|
|
461 |
|
|
/** |
462 |
|
|
* iterator of empty collection has no elements |
463 |
|
|
*/ |
464 |
|
|
public void testEmptyIterator() { |
465 |
|
|
assertIteratorExhausted(new PriorityQueue().iterator()); |
466 |
dl |
1.1 |
} |
467 |
|
|
|
468 |
dl |
1.5 |
/** |
469 |
dl |
1.6 |
* iterator.remove removes current element |
470 |
dl |
1.5 |
*/ |
471 |
jsr166 |
1.16 |
public void testIteratorRemove() { |
472 |
dl |
1.1 |
final PriorityQueue q = new PriorityQueue(3); |
473 |
|
|
q.add(new Integer(2)); |
474 |
|
|
q.add(new Integer(1)); |
475 |
|
|
q.add(new Integer(3)); |
476 |
|
|
|
477 |
|
|
Iterator it = q.iterator(); |
478 |
|
|
it.next(); |
479 |
|
|
it.remove(); |
480 |
|
|
|
481 |
|
|
it = q.iterator(); |
482 |
|
|
assertEquals(it.next(), new Integer(2)); |
483 |
|
|
assertEquals(it.next(), new Integer(3)); |
484 |
|
|
assertFalse(it.hasNext()); |
485 |
|
|
} |
486 |
|
|
|
487 |
dl |
1.5 |
/** |
488 |
dl |
1.6 |
* toString contains toStrings of elements |
489 |
dl |
1.5 |
*/ |
490 |
|
|
public void testToString() { |
491 |
dl |
1.3 |
PriorityQueue q = populatedQueue(SIZE); |
492 |
dl |
1.1 |
String s = q.toString(); |
493 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
494 |
jsr166 |
1.22 |
assertTrue(s.contains(String.valueOf(i))); |
495 |
dl |
1.1 |
} |
496 |
jsr166 |
1.9 |
} |
497 |
dl |
1.1 |
|
498 |
dl |
1.5 |
/** |
499 |
jsr166 |
1.9 |
* A deserialized serialized queue has same elements |
500 |
dl |
1.5 |
*/ |
501 |
jsr166 |
1.13 |
public void testSerialization() throws Exception { |
502 |
jsr166 |
1.23 |
Queue x = populatedQueue(SIZE); |
503 |
|
|
Queue y = serialClone(x); |
504 |
|
|
|
505 |
jsr166 |
1.26 |
assertNotSame(x, y); |
506 |
jsr166 |
1.23 |
assertEquals(x.size(), y.size()); |
507 |
|
|
while (!x.isEmpty()) { |
508 |
|
|
assertFalse(y.isEmpty()); |
509 |
|
|
assertEquals(x.remove(), y.remove()); |
510 |
|
|
} |
511 |
|
|
assertTrue(y.isEmpty()); |
512 |
dl |
1.2 |
} |
513 |
dl |
1.1 |
} |