1 |
dl |
1.1 |
/* |
2 |
jsr166 |
1.44 |
* Written by Doug Lea and Martin Buchholz with assistance from |
3 |
|
|
* members of JCP JSR-166 Expert Group and released to the public |
4 |
|
|
* domain, as explained at |
5 |
jsr166 |
1.22 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
6 |
dl |
1.1 |
*/ |
7 |
|
|
|
8 |
jsr166 |
1.30 |
import java.util.ArrayDeque; |
9 |
jsr166 |
1.24 |
import java.util.Arrays; |
10 |
|
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import java.util.Collection; |
11 |
|
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import java.util.Deque; |
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.Queue; |
15 |
|
|
import java.util.Random; |
16 |
jsr166 |
1.42 |
import java.util.concurrent.ThreadLocalRandom; |
17 |
dl |
1.1 |
|
18 |
jsr166 |
1.30 |
import junit.framework.Test; |
19 |
|
|
|
20 |
dl |
1.1 |
public class ArrayDequeTest extends JSR166TestCase { |
21 |
|
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public static void main(String[] args) { |
22 |
jsr166 |
1.34 |
main(suite(), args); |
23 |
dl |
1.1 |
} |
24 |
|
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|
25 |
|
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public static Test suite() { |
26 |
jsr166 |
1.40 |
class Implementation implements CollectionImplementation { |
27 |
|
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public Class<?> klazz() { return ArrayDeque.class; } |
28 |
jsr166 |
1.45 |
public Collection emptyCollection() { return populatedDeque(0); } |
29 |
dl |
1.59 |
public Object makeElement(int i) { return JSR166TestCase.itemFor(i); } |
30 |
jsr166 |
1.40 |
public boolean isConcurrent() { return false; } |
31 |
|
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public boolean permitsNulls() { return false; } |
32 |
|
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} |
33 |
|
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return newTestSuite(ArrayDequeTest.class, |
34 |
|
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CollectionTest.testSuite(new Implementation())); |
35 |
dl |
1.1 |
} |
36 |
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|
37 |
|
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/** |
38 |
jsr166 |
1.26 |
* Returns a new deque of given size containing consecutive |
39 |
dl |
1.59 |
* Items 0 ... n - 1. |
40 |
dl |
1.1 |
*/ |
41 |
dl |
1.59 |
private static ArrayDeque<Item> populatedDeque(int n) { |
42 |
jsr166 |
1.42 |
// Randomize various aspects of memory layout, including |
43 |
jsr166 |
1.54 |
// capacity slop and wraparound. |
44 |
dl |
1.59 |
final ArrayDeque<Item> q; |
45 |
jsr166 |
1.42 |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
46 |
|
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switch (rnd.nextInt(6)) { |
47 |
jsr166 |
1.60 |
case 0: q = new ArrayDeque<>(); break; |
48 |
|
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case 1: q = new ArrayDeque<>(0); break; |
49 |
|
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case 2: q = new ArrayDeque<>(1); break; |
50 |
|
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case 3: q = new ArrayDeque<>(Math.max(0, n - 1)); break; |
51 |
|
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case 4: q = new ArrayDeque<>(n); break; |
52 |
|
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case 5: q = new ArrayDeque<>(n + 1); break; |
53 |
jsr166 |
1.42 |
default: throw new AssertionError(); |
54 |
|
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} |
55 |
|
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switch (rnd.nextInt(3)) { |
56 |
|
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case 0: |
57 |
dl |
1.59 |
q.addFirst(fortytwo); |
58 |
|
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mustEqual(42, q.removeLast()); |
59 |
jsr166 |
1.42 |
break; |
60 |
|
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case 1: |
61 |
dl |
1.59 |
q.addLast(fortytwo); |
62 |
|
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mustEqual(42, q.removeFirst()); |
63 |
jsr166 |
1.42 |
break; |
64 |
|
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case 2: /* do nothing */ break; |
65 |
|
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default: throw new AssertionError(); |
66 |
|
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} |
67 |
dl |
1.1 |
assertTrue(q.isEmpty()); |
68 |
jsr166 |
1.42 |
if (rnd.nextBoolean()) |
69 |
|
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for (int i = 0; i < n; i++) |
70 |
dl |
1.59 |
assertTrue(q.offerLast(itemFor(i))); |
71 |
jsr166 |
1.42 |
else |
72 |
|
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for (int i = n; --i >= 0; ) |
73 |
dl |
1.59 |
q.addFirst(itemFor(i)); |
74 |
|
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mustEqual(n, q.size()); |
75 |
jsr166 |
1.43 |
if (n > 0) { |
76 |
|
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assertFalse(q.isEmpty()); |
77 |
dl |
1.59 |
mustEqual(0, q.peekFirst()); |
78 |
|
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mustEqual((n - 1), q.peekLast()); |
79 |
jsr166 |
1.43 |
} |
80 |
dl |
1.1 |
return q; |
81 |
|
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} |
82 |
jsr166 |
1.5 |
|
83 |
dl |
1.1 |
/** |
84 |
jsr166 |
1.16 |
* new deque is empty |
85 |
dl |
1.1 |
*/ |
86 |
|
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public void testConstructor1() { |
87 |
dl |
1.59 |
mustEqual(0, new ArrayDeque<Item>().size()); |
88 |
dl |
1.1 |
} |
89 |
|
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|
90 |
|
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/** |
91 |
|
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* Initializing from null Collection throws NPE |
92 |
|
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*/ |
93 |
|
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public void testConstructor3() { |
94 |
|
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try { |
95 |
dl |
1.59 |
new ArrayDeque<Object>((Collection<Object>)null); |
96 |
dl |
1.1 |
shouldThrow(); |
97 |
jsr166 |
1.9 |
} catch (NullPointerException success) {} |
98 |
dl |
1.1 |
} |
99 |
|
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|
100 |
|
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/** |
101 |
jsr166 |
1.16 |
* Initializing from Collection of null elements throws NPE |
102 |
|
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*/ |
103 |
|
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public void testConstructor4() { |
104 |
|
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try { |
105 |
dl |
1.59 |
new ArrayDeque<Item>(Arrays.asList(new Item[SIZE])); |
106 |
jsr166 |
1.16 |
shouldThrow(); |
107 |
|
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} catch (NullPointerException success) {} |
108 |
|
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} |
109 |
dl |
1.1 |
|
110 |
jsr166 |
1.16 |
/** |
111 |
|
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* Initializing from Collection with some null elements throws NPE |
112 |
|
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*/ |
113 |
|
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public void testConstructor5() { |
114 |
dl |
1.59 |
Item[] items = new Item[2]; items[0] = zero; |
115 |
jsr166 |
1.16 |
try { |
116 |
dl |
1.59 |
new ArrayDeque<Item>(Arrays.asList(items)); |
117 |
jsr166 |
1.16 |
shouldThrow(); |
118 |
|
|
} catch (NullPointerException success) {} |
119 |
|
|
} |
120 |
|
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|
121 |
|
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/** |
122 |
|
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* Deque contains all elements of collection used to initialize |
123 |
dl |
1.1 |
*/ |
124 |
|
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public void testConstructor6() { |
125 |
dl |
1.59 |
Item[] items = defaultItems; |
126 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(Arrays.asList(items)); |
127 |
jsr166 |
1.9 |
for (int i = 0; i < SIZE; ++i) |
128 |
dl |
1.59 |
mustEqual(items[i], q.pollFirst()); |
129 |
dl |
1.1 |
} |
130 |
|
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|
131 |
|
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/** |
132 |
|
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* isEmpty is true before add, false after |
133 |
|
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*/ |
134 |
|
|
public void testEmpty() { |
135 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
136 |
dl |
1.1 |
assertTrue(q.isEmpty()); |
137 |
dl |
1.59 |
q.add(one); |
138 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
139 |
dl |
1.59 |
q.add(two); |
140 |
dl |
1.1 |
q.removeFirst(); |
141 |
|
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q.removeFirst(); |
142 |
|
|
assertTrue(q.isEmpty()); |
143 |
|
|
} |
144 |
|
|
|
145 |
|
|
/** |
146 |
|
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* size changes when elements added and removed |
147 |
|
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*/ |
148 |
|
|
public void testSize() { |
149 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
150 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
151 |
dl |
1.59 |
mustEqual(SIZE - i, q.size()); |
152 |
dl |
1.1 |
q.removeFirst(); |
153 |
|
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} |
154 |
|
|
for (int i = 0; i < SIZE; ++i) { |
155 |
dl |
1.59 |
mustEqual(i, q.size()); |
156 |
|
|
mustAdd(q, i); |
157 |
dl |
1.1 |
} |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
/** |
161 |
|
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* push(null) throws NPE |
162 |
|
|
*/ |
163 |
|
|
public void testPushNull() { |
164 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(1); |
165 |
jsr166 |
1.8 |
try { |
166 |
dl |
1.1 |
q.push(null); |
167 |
|
|
shouldThrow(); |
168 |
jsr166 |
1.9 |
} catch (NullPointerException success) {} |
169 |
dl |
1.1 |
} |
170 |
|
|
|
171 |
|
|
/** |
172 |
jsr166 |
1.16 |
* peekFirst() returns element inserted with push |
173 |
dl |
1.1 |
*/ |
174 |
|
|
public void testPush() { |
175 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(3); |
176 |
dl |
1.1 |
q.pollLast(); |
177 |
jsr166 |
1.8 |
q.push(four); |
178 |
jsr166 |
1.12 |
assertSame(four, q.peekFirst()); |
179 |
jsr166 |
1.5 |
} |
180 |
dl |
1.1 |
|
181 |
|
|
/** |
182 |
jsr166 |
1.16 |
* pop() removes next element, or throws NSEE if empty |
183 |
dl |
1.1 |
*/ |
184 |
|
|
public void testPop() { |
185 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
186 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
187 |
dl |
1.59 |
mustEqual(i, q.pop()); |
188 |
dl |
1.1 |
} |
189 |
|
|
try { |
190 |
|
|
q.pop(); |
191 |
|
|
shouldThrow(); |
192 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
193 |
dl |
1.1 |
} |
194 |
|
|
|
195 |
|
|
/** |
196 |
|
|
* offer(null) throws NPE |
197 |
|
|
*/ |
198 |
jsr166 |
1.16 |
public void testOfferNull() { |
199 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
200 |
jsr166 |
1.16 |
try { |
201 |
|
|
q.offer(null); |
202 |
|
|
shouldThrow(); |
203 |
|
|
} catch (NullPointerException success) {} |
204 |
|
|
} |
205 |
|
|
|
206 |
|
|
/** |
207 |
|
|
* offerFirst(null) throws NPE |
208 |
|
|
*/ |
209 |
dl |
1.1 |
public void testOfferFirstNull() { |
210 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
211 |
jsr166 |
1.8 |
try { |
212 |
dl |
1.1 |
q.offerFirst(null); |
213 |
|
|
shouldThrow(); |
214 |
jsr166 |
1.9 |
} catch (NullPointerException success) {} |
215 |
dl |
1.1 |
} |
216 |
|
|
|
217 |
|
|
/** |
218 |
jsr166 |
1.16 |
* offerLast(null) throws NPE |
219 |
|
|
*/ |
220 |
|
|
public void testOfferLastNull() { |
221 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
222 |
jsr166 |
1.16 |
try { |
223 |
|
|
q.offerLast(null); |
224 |
|
|
shouldThrow(); |
225 |
|
|
} catch (NullPointerException success) {} |
226 |
|
|
} |
227 |
|
|
|
228 |
|
|
/** |
229 |
|
|
* offer(x) succeeds |
230 |
|
|
*/ |
231 |
|
|
public void testOffer() { |
232 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
233 |
jsr166 |
1.16 |
assertTrue(q.offer(zero)); |
234 |
|
|
assertTrue(q.offer(one)); |
235 |
|
|
assertSame(zero, q.peekFirst()); |
236 |
|
|
assertSame(one, q.peekLast()); |
237 |
|
|
} |
238 |
|
|
|
239 |
|
|
/** |
240 |
|
|
* offerFirst(x) succeeds |
241 |
dl |
1.1 |
*/ |
242 |
|
|
public void testOfferFirst() { |
243 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
244 |
jsr166 |
1.16 |
assertTrue(q.offerFirst(zero)); |
245 |
|
|
assertTrue(q.offerFirst(one)); |
246 |
|
|
assertSame(one, q.peekFirst()); |
247 |
|
|
assertSame(zero, q.peekLast()); |
248 |
dl |
1.1 |
} |
249 |
|
|
|
250 |
|
|
/** |
251 |
jsr166 |
1.16 |
* offerLast(x) succeeds |
252 |
dl |
1.1 |
*/ |
253 |
|
|
public void testOfferLast() { |
254 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
255 |
jsr166 |
1.16 |
assertTrue(q.offerLast(zero)); |
256 |
|
|
assertTrue(q.offerLast(one)); |
257 |
|
|
assertSame(zero, q.peekFirst()); |
258 |
|
|
assertSame(one, q.peekLast()); |
259 |
dl |
1.1 |
} |
260 |
|
|
|
261 |
|
|
/** |
262 |
jsr166 |
1.16 |
* add(null) throws NPE |
263 |
|
|
*/ |
264 |
|
|
public void testAddNull() { |
265 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
266 |
jsr166 |
1.16 |
try { |
267 |
|
|
q.add(null); |
268 |
|
|
shouldThrow(); |
269 |
|
|
} catch (NullPointerException success) {} |
270 |
|
|
} |
271 |
|
|
|
272 |
|
|
/** |
273 |
|
|
* addFirst(null) throws NPE |
274 |
|
|
*/ |
275 |
|
|
public void testAddFirstNull() { |
276 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
277 |
jsr166 |
1.16 |
try { |
278 |
|
|
q.addFirst(null); |
279 |
|
|
shouldThrow(); |
280 |
|
|
} catch (NullPointerException success) {} |
281 |
|
|
} |
282 |
|
|
|
283 |
|
|
/** |
284 |
|
|
* addLast(null) throws NPE |
285 |
|
|
*/ |
286 |
|
|
public void testAddLastNull() { |
287 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
288 |
jsr166 |
1.16 |
try { |
289 |
|
|
q.addLast(null); |
290 |
|
|
shouldThrow(); |
291 |
|
|
} catch (NullPointerException success) {} |
292 |
|
|
} |
293 |
|
|
|
294 |
|
|
/** |
295 |
|
|
* add(x) succeeds |
296 |
dl |
1.1 |
*/ |
297 |
|
|
public void testAdd() { |
298 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
299 |
jsr166 |
1.16 |
assertTrue(q.add(zero)); |
300 |
|
|
assertTrue(q.add(one)); |
301 |
|
|
assertSame(zero, q.peekFirst()); |
302 |
|
|
assertSame(one, q.peekLast()); |
303 |
|
|
} |
304 |
|
|
|
305 |
|
|
/** |
306 |
|
|
* addFirst(x) succeeds |
307 |
|
|
*/ |
308 |
|
|
public void testAddFirst() { |
309 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
310 |
jsr166 |
1.16 |
q.addFirst(zero); |
311 |
|
|
q.addFirst(one); |
312 |
|
|
assertSame(one, q.peekFirst()); |
313 |
|
|
assertSame(zero, q.peekLast()); |
314 |
|
|
} |
315 |
|
|
|
316 |
|
|
/** |
317 |
|
|
* addLast(x) succeeds |
318 |
|
|
*/ |
319 |
|
|
public void testAddLast() { |
320 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
321 |
jsr166 |
1.16 |
q.addLast(zero); |
322 |
|
|
q.addLast(one); |
323 |
|
|
assertSame(zero, q.peekFirst()); |
324 |
|
|
assertSame(one, q.peekLast()); |
325 |
dl |
1.1 |
} |
326 |
|
|
|
327 |
|
|
/** |
328 |
|
|
* addAll(null) throws NPE |
329 |
|
|
*/ |
330 |
|
|
public void testAddAll1() { |
331 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
332 |
dl |
1.1 |
try { |
333 |
|
|
q.addAll(null); |
334 |
|
|
shouldThrow(); |
335 |
jsr166 |
1.9 |
} catch (NullPointerException success) {} |
336 |
dl |
1.1 |
} |
337 |
|
|
|
338 |
|
|
/** |
339 |
jsr166 |
1.16 |
* addAll of a collection with null elements throws NPE |
340 |
|
|
*/ |
341 |
|
|
public void testAddAll2() { |
342 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
343 |
jsr166 |
1.16 |
try { |
344 |
dl |
1.59 |
q.addAll(Arrays.asList(new Item[SIZE])); |
345 |
jsr166 |
1.16 |
shouldThrow(); |
346 |
|
|
} catch (NullPointerException success) {} |
347 |
|
|
} |
348 |
|
|
|
349 |
|
|
/** |
350 |
|
|
* addAll of a collection with any null elements throws NPE after |
351 |
|
|
* possibly adding some elements |
352 |
|
|
*/ |
353 |
|
|
public void testAddAll3() { |
354 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
355 |
dl |
1.59 |
Item[] items = new Item[2]; items[0] = zero; |
356 |
jsr166 |
1.16 |
try { |
357 |
dl |
1.59 |
q.addAll(Arrays.asList(items)); |
358 |
jsr166 |
1.16 |
shouldThrow(); |
359 |
|
|
} catch (NullPointerException success) {} |
360 |
|
|
} |
361 |
|
|
|
362 |
|
|
/** |
363 |
|
|
* Deque contains all elements, in traversal order, of successful addAll |
364 |
dl |
1.1 |
*/ |
365 |
|
|
public void testAddAll5() { |
366 |
dl |
1.59 |
Item[] empty = new Item[0]; |
367 |
|
|
Item[] items = defaultItems; |
368 |
jsr166 |
1.60 |
ArrayDeque<Item> q = new ArrayDeque<>(); |
369 |
jsr166 |
1.10 |
assertFalse(q.addAll(Arrays.asList(empty))); |
370 |
dl |
1.59 |
assertTrue(q.addAll(Arrays.asList(items))); |
371 |
jsr166 |
1.10 |
for (int i = 0; i < SIZE; ++i) |
372 |
dl |
1.59 |
mustEqual(items[i], q.pollFirst()); |
373 |
dl |
1.1 |
} |
374 |
|
|
|
375 |
|
|
/** |
376 |
jsr166 |
1.16 |
* pollFirst() succeeds unless empty |
377 |
dl |
1.1 |
*/ |
378 |
|
|
public void testPollFirst() { |
379 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
380 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
381 |
dl |
1.59 |
mustEqual(i, q.pollFirst()); |
382 |
dl |
1.1 |
} |
383 |
jsr166 |
1.8 |
assertNull(q.pollFirst()); |
384 |
dl |
1.1 |
} |
385 |
|
|
|
386 |
|
|
/** |
387 |
jsr166 |
1.16 |
* pollLast() succeeds unless empty |
388 |
dl |
1.1 |
*/ |
389 |
|
|
public void testPollLast() { |
390 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
391 |
jsr166 |
1.36 |
for (int i = SIZE - 1; i >= 0; --i) { |
392 |
dl |
1.59 |
mustEqual(i, q.pollLast()); |
393 |
dl |
1.1 |
} |
394 |
jsr166 |
1.8 |
assertNull(q.pollLast()); |
395 |
dl |
1.1 |
} |
396 |
|
|
|
397 |
|
|
/** |
398 |
jsr166 |
1.16 |
* poll() succeeds unless empty |
399 |
dl |
1.1 |
*/ |
400 |
|
|
public void testPoll() { |
401 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
402 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
403 |
dl |
1.59 |
mustEqual(i, q.poll()); |
404 |
dl |
1.1 |
} |
405 |
jsr166 |
1.8 |
assertNull(q.poll()); |
406 |
dl |
1.1 |
} |
407 |
|
|
|
408 |
|
|
/** |
409 |
jsr166 |
1.16 |
* remove() removes next element, or throws NSEE if empty |
410 |
dl |
1.1 |
*/ |
411 |
|
|
public void testRemove() { |
412 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
413 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
414 |
dl |
1.59 |
mustEqual(i, q.remove()); |
415 |
dl |
1.1 |
} |
416 |
|
|
try { |
417 |
|
|
q.remove(); |
418 |
|
|
shouldThrow(); |
419 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
420 |
dl |
1.1 |
} |
421 |
|
|
|
422 |
|
|
/** |
423 |
jsr166 |
1.16 |
* remove(x) removes x and returns true if present |
424 |
|
|
*/ |
425 |
|
|
public void testRemoveElement() { |
426 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
427 |
jsr166 |
1.31 |
for (int i = 1; i < SIZE; i += 2) { |
428 |
dl |
1.59 |
mustContain(q, i); |
429 |
|
|
mustRemove(q, i); |
430 |
|
|
mustNotContain(q, i); |
431 |
|
|
mustContain(q, i - 1); |
432 |
jsr166 |
1.16 |
} |
433 |
jsr166 |
1.31 |
for (int i = 0; i < SIZE; i += 2) { |
434 |
dl |
1.59 |
mustContain(q, i); |
435 |
|
|
mustRemove(q, i); |
436 |
|
|
mustNotContain(q, i); |
437 |
|
|
mustNotRemove(q, i + 1); |
438 |
|
|
mustNotContain(q, i + 1); |
439 |
jsr166 |
1.16 |
} |
440 |
|
|
assertTrue(q.isEmpty()); |
441 |
|
|
} |
442 |
|
|
|
443 |
|
|
/** |
444 |
|
|
* peekFirst() returns next element, or null if empty |
445 |
dl |
1.1 |
*/ |
446 |
|
|
public void testPeekFirst() { |
447 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
448 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
449 |
dl |
1.59 |
mustEqual(i, q.peekFirst()); |
450 |
|
|
mustEqual(i, q.pollFirst()); |
451 |
dl |
1.1 |
assertTrue(q.peekFirst() == null || |
452 |
jsr166 |
1.12 |
!q.peekFirst().equals(i)); |
453 |
dl |
1.1 |
} |
454 |
jsr166 |
1.8 |
assertNull(q.peekFirst()); |
455 |
dl |
1.1 |
} |
456 |
|
|
|
457 |
|
|
/** |
458 |
jsr166 |
1.16 |
* peek() returns next element, or null if empty |
459 |
dl |
1.1 |
*/ |
460 |
|
|
public void testPeek() { |
461 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
462 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
463 |
dl |
1.59 |
mustEqual(i, q.peek()); |
464 |
|
|
mustEqual(i, q.poll()); |
465 |
dl |
1.1 |
assertTrue(q.peek() == null || |
466 |
jsr166 |
1.12 |
!q.peek().equals(i)); |
467 |
dl |
1.1 |
} |
468 |
jsr166 |
1.8 |
assertNull(q.peek()); |
469 |
dl |
1.1 |
} |
470 |
|
|
|
471 |
|
|
/** |
472 |
jsr166 |
1.16 |
* peekLast() returns next element, or null if empty |
473 |
dl |
1.1 |
*/ |
474 |
|
|
public void testPeekLast() { |
475 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
476 |
jsr166 |
1.36 |
for (int i = SIZE - 1; i >= 0; --i) { |
477 |
dl |
1.59 |
mustEqual(i, q.peekLast()); |
478 |
|
|
mustEqual(i, q.pollLast()); |
479 |
dl |
1.1 |
assertTrue(q.peekLast() == null || |
480 |
jsr166 |
1.12 |
!q.peekLast().equals(i)); |
481 |
dl |
1.1 |
} |
482 |
jsr166 |
1.8 |
assertNull(q.peekLast()); |
483 |
dl |
1.1 |
} |
484 |
|
|
|
485 |
|
|
/** |
486 |
jsr166 |
1.16 |
* element() returns first element, or throws NSEE if empty |
487 |
|
|
*/ |
488 |
|
|
public void testElement() { |
489 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
490 |
jsr166 |
1.16 |
for (int i = 0; i < SIZE; ++i) { |
491 |
dl |
1.59 |
mustEqual(i, q.element()); |
492 |
|
|
mustEqual(i, q.poll()); |
493 |
jsr166 |
1.16 |
} |
494 |
|
|
try { |
495 |
|
|
q.element(); |
496 |
|
|
shouldThrow(); |
497 |
|
|
} catch (NoSuchElementException success) {} |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
/** |
501 |
|
|
* getFirst() returns first element, or throws NSEE if empty |
502 |
dl |
1.1 |
*/ |
503 |
|
|
public void testFirstElement() { |
504 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
505 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
506 |
dl |
1.59 |
mustEqual(i, q.getFirst()); |
507 |
|
|
mustEqual(i, q.pollFirst()); |
508 |
dl |
1.1 |
} |
509 |
|
|
try { |
510 |
|
|
q.getFirst(); |
511 |
|
|
shouldThrow(); |
512 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
513 |
dl |
1.1 |
} |
514 |
|
|
|
515 |
|
|
/** |
516 |
jsr166 |
1.16 |
* getLast() returns last element, or throws NSEE if empty |
517 |
dl |
1.1 |
*/ |
518 |
|
|
public void testLastElement() { |
519 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
520 |
jsr166 |
1.36 |
for (int i = SIZE - 1; i >= 0; --i) { |
521 |
dl |
1.59 |
mustEqual(i, q.getLast()); |
522 |
|
|
mustEqual(i, q.pollLast()); |
523 |
dl |
1.1 |
} |
524 |
|
|
try { |
525 |
|
|
q.getLast(); |
526 |
|
|
shouldThrow(); |
527 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
528 |
jsr166 |
1.8 |
assertNull(q.peekLast()); |
529 |
dl |
1.1 |
} |
530 |
|
|
|
531 |
|
|
/** |
532 |
jsr166 |
1.16 |
* removeFirst() removes first element, or throws NSEE if empty |
533 |
dl |
1.1 |
*/ |
534 |
|
|
public void testRemoveFirst() { |
535 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
536 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
537 |
dl |
1.59 |
mustEqual(i, q.removeFirst()); |
538 |
dl |
1.1 |
} |
539 |
|
|
try { |
540 |
|
|
q.removeFirst(); |
541 |
|
|
shouldThrow(); |
542 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
543 |
jsr166 |
1.16 |
assertNull(q.peekFirst()); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
/** |
547 |
|
|
* removeLast() removes last element, or throws NSEE if empty |
548 |
|
|
*/ |
549 |
|
|
public void testRemoveLast() { |
550 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
551 |
jsr166 |
1.16 |
for (int i = SIZE - 1; i >= 0; --i) { |
552 |
dl |
1.59 |
mustEqual(i, q.removeLast()); |
553 |
jsr166 |
1.16 |
} |
554 |
|
|
try { |
555 |
|
|
q.removeLast(); |
556 |
|
|
shouldThrow(); |
557 |
|
|
} catch (NoSuchElementException success) {} |
558 |
|
|
assertNull(q.peekLast()); |
559 |
dl |
1.1 |
} |
560 |
|
|
|
561 |
|
|
/** |
562 |
|
|
* removeFirstOccurrence(x) removes x and returns true if present |
563 |
|
|
*/ |
564 |
|
|
public void testRemoveFirstOccurrence() { |
565 |
dl |
1.59 |
Deque<Item> q = populatedDeque(SIZE); |
566 |
jsr166 |
1.39 |
assertFalse(q.removeFirstOccurrence(null)); |
567 |
jsr166 |
1.31 |
for (int i = 1; i < SIZE; i += 2) { |
568 |
dl |
1.59 |
assertTrue(q.removeFirstOccurrence(itemFor(i))); |
569 |
|
|
mustNotContain(q, i); |
570 |
dl |
1.1 |
} |
571 |
jsr166 |
1.31 |
for (int i = 0; i < SIZE; i += 2) { |
572 |
dl |
1.59 |
assertTrue(q.removeFirstOccurrence(itemFor(i))); |
573 |
|
|
assertFalse(q.removeFirstOccurrence(itemFor(i + 1))); |
574 |
|
|
mustNotContain(q, i); |
575 |
|
|
mustNotContain(q, i + 1); |
576 |
dl |
1.1 |
} |
577 |
|
|
assertTrue(q.isEmpty()); |
578 |
jsr166 |
1.39 |
assertFalse(q.removeFirstOccurrence(null)); |
579 |
dl |
1.59 |
assertFalse(q.removeFirstOccurrence(fortytwo)); |
580 |
jsr166 |
1.60 |
q = new ArrayDeque<>(); |
581 |
jsr166 |
1.39 |
assertFalse(q.removeFirstOccurrence(null)); |
582 |
dl |
1.59 |
assertFalse(q.removeFirstOccurrence(fortytwo)); |
583 |
dl |
1.1 |
} |
584 |
|
|
|
585 |
|
|
/** |
586 |
|
|
* removeLastOccurrence(x) removes x and returns true if present |
587 |
|
|
*/ |
588 |
|
|
public void testRemoveLastOccurrence() { |
589 |
dl |
1.59 |
Deque<Item> q = populatedDeque(SIZE); |
590 |
jsr166 |
1.39 |
assertFalse(q.removeLastOccurrence(null)); |
591 |
jsr166 |
1.31 |
for (int i = 1; i < SIZE; i += 2) { |
592 |
dl |
1.59 |
assertTrue(q.removeLastOccurrence(itemFor(i))); |
593 |
|
|
mustNotContain(q, i); |
594 |
dl |
1.1 |
} |
595 |
jsr166 |
1.31 |
for (int i = 0; i < SIZE; i += 2) { |
596 |
dl |
1.59 |
assertTrue(q.removeLastOccurrence(itemFor(i))); |
597 |
|
|
assertFalse(q.removeLastOccurrence(itemFor(i + 1))); |
598 |
|
|
mustNotContain(q, i); |
599 |
|
|
mustNotContain(q, i + 1); |
600 |
dl |
1.1 |
} |
601 |
|
|
assertTrue(q.isEmpty()); |
602 |
jsr166 |
1.39 |
assertFalse(q.removeLastOccurrence(null)); |
603 |
dl |
1.59 |
assertFalse(q.removeLastOccurrence(fortytwo)); |
604 |
jsr166 |
1.60 |
q = new ArrayDeque<>(); |
605 |
jsr166 |
1.39 |
assertFalse(q.removeLastOccurrence(null)); |
606 |
dl |
1.59 |
assertFalse(q.removeLastOccurrence(fortytwo)); |
607 |
dl |
1.1 |
} |
608 |
|
|
|
609 |
|
|
/** |
610 |
|
|
* contains(x) reports true when elements added but not yet removed |
611 |
|
|
*/ |
612 |
|
|
public void testContains() { |
613 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
614 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
615 |
dl |
1.59 |
mustContain(q, i); |
616 |
|
|
mustEqual(i, q.pollFirst()); |
617 |
|
|
mustNotContain(q, i); |
618 |
dl |
1.1 |
} |
619 |
|
|
} |
620 |
|
|
|
621 |
|
|
/** |
622 |
|
|
* clear removes all elements |
623 |
|
|
*/ |
624 |
|
|
public void testClear() { |
625 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
626 |
dl |
1.1 |
q.clear(); |
627 |
|
|
assertTrue(q.isEmpty()); |
628 |
dl |
1.59 |
mustEqual(0, q.size()); |
629 |
|
|
mustAdd(q, one); |
630 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
631 |
|
|
q.clear(); |
632 |
|
|
assertTrue(q.isEmpty()); |
633 |
|
|
} |
634 |
|
|
|
635 |
|
|
/** |
636 |
|
|
* containsAll(c) is true when c contains a subset of elements |
637 |
|
|
*/ |
638 |
|
|
public void testContainsAll() { |
639 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
640 |
jsr166 |
1.60 |
ArrayDeque<Item> p = new ArrayDeque<>(); |
641 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
642 |
|
|
assertTrue(q.containsAll(p)); |
643 |
|
|
assertFalse(p.containsAll(q)); |
644 |
dl |
1.59 |
mustAdd(p, i); |
645 |
dl |
1.1 |
} |
646 |
|
|
assertTrue(p.containsAll(q)); |
647 |
|
|
} |
648 |
|
|
|
649 |
|
|
/** |
650 |
|
|
* retainAll(c) retains only those elements of c and reports true if changed |
651 |
|
|
*/ |
652 |
|
|
public void testRetainAll() { |
653 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
654 |
|
|
ArrayDeque<Item> p = populatedDeque(SIZE); |
655 |
dl |
1.1 |
for (int i = 0; i < SIZE; ++i) { |
656 |
|
|
boolean changed = q.retainAll(p); |
657 |
dl |
1.59 |
mustEqual(changed, (i > 0)); |
658 |
dl |
1.1 |
assertTrue(q.containsAll(p)); |
659 |
dl |
1.59 |
mustEqual(SIZE - i, q.size()); |
660 |
dl |
1.1 |
p.removeFirst(); |
661 |
|
|
} |
662 |
|
|
} |
663 |
|
|
|
664 |
|
|
/** |
665 |
|
|
* removeAll(c) removes only those elements of c and reports true if changed |
666 |
|
|
*/ |
667 |
|
|
public void testRemoveAll() { |
668 |
|
|
for (int i = 1; i < SIZE; ++i) { |
669 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
670 |
|
|
ArrayDeque<Item> p = populatedDeque(i); |
671 |
dl |
1.1 |
assertTrue(q.removeAll(p)); |
672 |
dl |
1.59 |
mustEqual(SIZE - i, q.size()); |
673 |
dl |
1.1 |
for (int j = 0; j < i; ++j) { |
674 |
dl |
1.59 |
mustNotContain(q, p.removeFirst()); |
675 |
dl |
1.1 |
} |
676 |
|
|
} |
677 |
|
|
} |
678 |
|
|
|
679 |
dl |
1.59 |
void checkToArray(ArrayDeque<Item> q) { |
680 |
jsr166 |
1.27 |
int size = q.size(); |
681 |
jsr166 |
1.52 |
Object[] a1 = q.toArray(); |
682 |
dl |
1.59 |
mustEqual(size, a1.length); |
683 |
|
|
Item[] a2 = q.toArray(new Item[0]); |
684 |
|
|
mustEqual(size, a2.length); |
685 |
|
|
Item[] a3 = q.toArray(new Item[Math.max(0, size - 1)]); |
686 |
|
|
mustEqual(size, a3.length); |
687 |
|
|
Item[] a4 = new Item[size]; |
688 |
jsr166 |
1.52 |
assertSame(a4, q.toArray(a4)); |
689 |
dl |
1.59 |
Item[] a5 = new Item[size + 1]; |
690 |
|
|
Arrays.fill(a5, fortytwo); |
691 |
jsr166 |
1.52 |
assertSame(a5, q.toArray(a5)); |
692 |
dl |
1.59 |
Item[] a6 = new Item[size + 2]; |
693 |
|
|
Arrays.fill(a6, fortytwo); |
694 |
jsr166 |
1.52 |
assertSame(a6, q.toArray(a6)); |
695 |
|
|
Object[][] as = { a1, a2, a3, a4, a5, a6 }; |
696 |
|
|
for (Object[] a : as) { |
697 |
|
|
if (a.length > size) assertNull(a[size]); |
698 |
dl |
1.59 |
if (a.length > size + 1) mustEqual(fortytwo, a[size + 1]); |
699 |
jsr166 |
1.52 |
} |
700 |
dl |
1.59 |
Iterator<? extends Item> it = q.iterator(); |
701 |
|
|
Item s = q.peekFirst(); |
702 |
jsr166 |
1.27 |
for (int i = 0; i < size; i++) { |
703 |
dl |
1.59 |
Item x = (Item) it.next(); |
704 |
|
|
mustEqual(s.value + i, x); |
705 |
jsr166 |
1.52 |
for (Object[] a : as) |
706 |
jsr166 |
1.58 |
assertSame(a[i], x); |
707 |
jsr166 |
1.27 |
} |
708 |
|
|
} |
709 |
|
|
|
710 |
dl |
1.1 |
/** |
711 |
jsr166 |
1.52 |
* toArray() and toArray(a) contain all elements in FIFO order |
712 |
dl |
1.1 |
*/ |
713 |
|
|
public void testToArray() { |
714 |
jsr166 |
1.52 |
final int size = ThreadLocalRandom.current().nextInt(10); |
715 |
dl |
1.59 |
ArrayDeque<Item> q = new ArrayDeque<>(size); |
716 |
jsr166 |
1.52 |
for (int i = 0; i < size; i++) { |
717 |
jsr166 |
1.27 |
checkToArray(q); |
718 |
dl |
1.59 |
q.addLast(itemFor(i)); |
719 |
jsr166 |
1.27 |
} |
720 |
|
|
// Provoke wraparound |
721 |
jsr166 |
1.52 |
int added = size * 2; |
722 |
|
|
for (int i = 0; i < added; i++) { |
723 |
jsr166 |
1.27 |
checkToArray(q); |
724 |
dl |
1.59 |
mustEqual(i, q.poll()); |
725 |
|
|
q.addLast(itemFor(size + i)); |
726 |
jsr166 |
1.27 |
} |
727 |
jsr166 |
1.52 |
for (int i = 0; i < size; i++) { |
728 |
jsr166 |
1.27 |
checkToArray(q); |
729 |
dl |
1.59 |
mustEqual((added + i), q.poll()); |
730 |
jsr166 |
1.27 |
} |
731 |
dl |
1.1 |
} |
732 |
|
|
|
733 |
|
|
/** |
734 |
jsr166 |
1.18 |
* toArray(null) throws NullPointerException |
735 |
dl |
1.1 |
*/ |
736 |
jsr166 |
1.18 |
public void testToArray_NullArg() { |
737 |
jsr166 |
1.60 |
ArrayDeque<Item> l = new ArrayDeque<>(); |
738 |
dl |
1.59 |
l.add(zero); |
739 |
jsr166 |
1.8 |
try { |
740 |
jsr166 |
1.57 |
l.toArray((Object[])null); |
741 |
jsr166 |
1.8 |
shouldThrow(); |
742 |
|
|
} catch (NullPointerException success) {} |
743 |
dl |
1.1 |
} |
744 |
|
|
|
745 |
|
|
/** |
746 |
jsr166 |
1.17 |
* toArray(incompatible array type) throws ArrayStoreException |
747 |
dl |
1.1 |
*/ |
748 |
jsr166 |
1.52 |
public void testToArray_incompatibleArrayType() { |
749 |
jsr166 |
1.60 |
ArrayDeque<Item> l = new ArrayDeque<>(); |
750 |
dl |
1.59 |
l.add(five); |
751 |
jsr166 |
1.8 |
try { |
752 |
jsr166 |
1.17 |
l.toArray(new String[10]); |
753 |
jsr166 |
1.8 |
shouldThrow(); |
754 |
jsr166 |
1.9 |
} catch (ArrayStoreException success) {} |
755 |
jsr166 |
1.52 |
try { |
756 |
|
|
l.toArray(new String[0]); |
757 |
|
|
shouldThrow(); |
758 |
|
|
} catch (ArrayStoreException success) {} |
759 |
dl |
1.1 |
} |
760 |
jsr166 |
1.5 |
|
761 |
dl |
1.1 |
/** |
762 |
jsr166 |
1.16 |
* Iterator iterates through all elements |
763 |
dl |
1.1 |
*/ |
764 |
|
|
public void testIterator() { |
765 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
766 |
|
|
Iterator<? extends Item> it = q.iterator(); |
767 |
jsr166 |
1.32 |
int i; |
768 |
|
|
for (i = 0; it.hasNext(); i++) |
769 |
dl |
1.59 |
mustContain(q, it.next()); |
770 |
|
|
mustEqual(i, SIZE); |
771 |
jsr166 |
1.32 |
assertIteratorExhausted(it); |
772 |
|
|
} |
773 |
|
|
|
774 |
|
|
/** |
775 |
|
|
* iterator of empty collection has no elements |
776 |
|
|
*/ |
777 |
|
|
public void testEmptyIterator() { |
778 |
jsr166 |
1.60 |
Deque<Item> c = new ArrayDeque<>(); |
779 |
jsr166 |
1.32 |
assertIteratorExhausted(c.iterator()); |
780 |
|
|
assertIteratorExhausted(c.descendingIterator()); |
781 |
dl |
1.1 |
} |
782 |
|
|
|
783 |
|
|
/** |
784 |
jsr166 |
1.16 |
* Iterator ordering is FIFO |
785 |
dl |
1.1 |
*/ |
786 |
|
|
public void testIteratorOrdering() { |
787 |
jsr166 |
1.60 |
final ArrayDeque<Item> q = new ArrayDeque<>(); |
788 |
jsr166 |
1.16 |
q.add(one); |
789 |
|
|
q.add(two); |
790 |
|
|
q.add(three); |
791 |
dl |
1.1 |
int k = 0; |
792 |
dl |
1.59 |
for (Iterator<? extends Item> it = q.iterator(); it.hasNext();) { |
793 |
|
|
mustEqual(++k, it.next()); |
794 |
dl |
1.1 |
} |
795 |
|
|
|
796 |
dl |
1.59 |
mustEqual(3, k); |
797 |
dl |
1.1 |
} |
798 |
|
|
|
799 |
|
|
/** |
800 |
jsr166 |
1.16 |
* iterator.remove() removes current element |
801 |
dl |
1.1 |
*/ |
802 |
jsr166 |
1.16 |
public void testIteratorRemove() { |
803 |
jsr166 |
1.60 |
final ArrayDeque<Item> q = new ArrayDeque<>(); |
804 |
dl |
1.4 |
final Random rng = new Random(); |
805 |
dl |
1.3 |
for (int iters = 0; iters < 100; ++iters) { |
806 |
dl |
1.4 |
int max = rng.nextInt(5) + 2; |
807 |
jsr166 |
1.38 |
int split = rng.nextInt(max - 1) + 1; |
808 |
dl |
1.4 |
for (int j = 1; j <= max; ++j) |
809 |
dl |
1.59 |
mustAdd(q, j); |
810 |
|
|
Iterator<? extends Item> it = q.iterator(); |
811 |
jsr166 |
1.5 |
for (int j = 1; j <= split; ++j) |
812 |
dl |
1.59 |
mustEqual(it.next(), j); |
813 |
dl |
1.3 |
it.remove(); |
814 |
dl |
1.59 |
mustEqual(it.next(), split + 1); |
815 |
jsr166 |
1.5 |
for (int j = 1; j <= split; ++j) |
816 |
dl |
1.59 |
q.remove(itemFor(j)); |
817 |
dl |
1.3 |
it = q.iterator(); |
818 |
jsr166 |
1.38 |
for (int j = split + 1; j <= max; ++j) { |
819 |
dl |
1.59 |
mustEqual(it.next(), j); |
820 |
dl |
1.4 |
it.remove(); |
821 |
|
|
} |
822 |
dl |
1.3 |
assertFalse(it.hasNext()); |
823 |
dl |
1.4 |
assertTrue(q.isEmpty()); |
824 |
dl |
1.3 |
} |
825 |
dl |
1.1 |
} |
826 |
|
|
|
827 |
dl |
1.2 |
/** |
828 |
jsr166 |
1.16 |
* Descending iterator iterates through all elements |
829 |
dl |
1.2 |
*/ |
830 |
|
|
public void testDescendingIterator() { |
831 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
832 |
dl |
1.2 |
int i = 0; |
833 |
dl |
1.59 |
Iterator<? extends Item> it = q.descendingIterator(); |
834 |
jsr166 |
1.6 |
while (it.hasNext()) { |
835 |
dl |
1.59 |
mustContain(q, it.next()); |
836 |
dl |
1.2 |
++i; |
837 |
|
|
} |
838 |
dl |
1.59 |
mustEqual(i, SIZE); |
839 |
dl |
1.2 |
assertFalse(it.hasNext()); |
840 |
|
|
try { |
841 |
|
|
it.next(); |
842 |
jsr166 |
1.11 |
shouldThrow(); |
843 |
jsr166 |
1.9 |
} catch (NoSuchElementException success) {} |
844 |
dl |
1.2 |
} |
845 |
|
|
|
846 |
|
|
/** |
847 |
jsr166 |
1.16 |
* Descending iterator ordering is reverse FIFO |
848 |
dl |
1.2 |
*/ |
849 |
|
|
public void testDescendingIteratorOrdering() { |
850 |
jsr166 |
1.60 |
final ArrayDeque<Item> q = new ArrayDeque<>(); |
851 |
dl |
1.3 |
for (int iters = 0; iters < 100; ++iters) { |
852 |
dl |
1.59 |
q.add(three); |
853 |
|
|
q.add(two); |
854 |
|
|
q.add(one); |
855 |
dl |
1.3 |
int k = 0; |
856 |
dl |
1.59 |
for (Iterator<? extends Item> it = q.descendingIterator(); it.hasNext();) { |
857 |
|
|
mustEqual(++k, it.next()); |
858 |
dl |
1.3 |
} |
859 |
jsr166 |
1.5 |
|
860 |
dl |
1.59 |
mustEqual(3, k); |
861 |
dl |
1.3 |
q.remove(); |
862 |
|
|
q.remove(); |
863 |
|
|
q.remove(); |
864 |
dl |
1.2 |
} |
865 |
|
|
} |
866 |
|
|
|
867 |
|
|
/** |
868 |
jsr166 |
1.16 |
* descendingIterator.remove() removes current element |
869 |
dl |
1.2 |
*/ |
870 |
jsr166 |
1.16 |
public void testDescendingIteratorRemove() { |
871 |
jsr166 |
1.60 |
final ArrayDeque<Item> q = new ArrayDeque<>(); |
872 |
dl |
1.4 |
final Random rng = new Random(); |
873 |
dl |
1.3 |
for (int iters = 0; iters < 100; ++iters) { |
874 |
dl |
1.4 |
int max = rng.nextInt(5) + 2; |
875 |
jsr166 |
1.38 |
int split = rng.nextInt(max - 1) + 1; |
876 |
dl |
1.4 |
for (int j = max; j >= 1; --j) |
877 |
dl |
1.59 |
q.add(itemFor(j)); |
878 |
|
|
Iterator<? extends Item> it = q.descendingIterator(); |
879 |
jsr166 |
1.5 |
for (int j = 1; j <= split; ++j) |
880 |
dl |
1.59 |
mustEqual(it.next(), itemFor(j)); |
881 |
dl |
1.3 |
it.remove(); |
882 |
dl |
1.59 |
mustEqual(it.next(), itemFor(split + 1)); |
883 |
jsr166 |
1.5 |
for (int j = 1; j <= split; ++j) |
884 |
dl |
1.59 |
q.remove(itemFor(j)); |
885 |
dl |
1.3 |
it = q.descendingIterator(); |
886 |
jsr166 |
1.38 |
for (int j = split + 1; j <= max; ++j) { |
887 |
dl |
1.59 |
mustEqual(it.next(), j); |
888 |
dl |
1.4 |
it.remove(); |
889 |
|
|
} |
890 |
dl |
1.3 |
assertFalse(it.hasNext()); |
891 |
dl |
1.4 |
assertTrue(q.isEmpty()); |
892 |
dl |
1.3 |
} |
893 |
dl |
1.2 |
} |
894 |
|
|
|
895 |
dl |
1.1 |
/** |
896 |
jsr166 |
1.16 |
* toString() contains toStrings of elements |
897 |
dl |
1.1 |
*/ |
898 |
|
|
public void testToString() { |
899 |
dl |
1.59 |
ArrayDeque<Item> q = populatedDeque(SIZE); |
900 |
dl |
1.1 |
String s = q.toString(); |
901 |
|
|
for (int i = 0; i < SIZE; ++i) { |
902 |
jsr166 |
1.23 |
assertTrue(s.contains(String.valueOf(i))); |
903 |
dl |
1.1 |
} |
904 |
jsr166 |
1.5 |
} |
905 |
dl |
1.1 |
|
906 |
|
|
/** |
907 |
jsr166 |
1.56 |
* A deserialized/reserialized deque has same elements in same order |
908 |
dl |
1.1 |
*/ |
909 |
jsr166 |
1.16 |
public void testSerialization() throws Exception { |
910 |
dl |
1.59 |
Queue<Item> x = populatedDeque(SIZE); |
911 |
|
|
Queue<Item> y = serialClone(x); |
912 |
jsr166 |
1.24 |
|
913 |
jsr166 |
1.28 |
assertNotSame(y, x); |
914 |
dl |
1.59 |
mustEqual(x.size(), y.size()); |
915 |
|
|
mustEqual(x.toString(), y.toString()); |
916 |
|
|
mustEqual(Arrays.toString(x.toArray()), Arrays.toString(y.toArray())); |
917 |
jsr166 |
1.24 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
918 |
|
|
while (!x.isEmpty()) { |
919 |
|
|
assertFalse(y.isEmpty()); |
920 |
dl |
1.59 |
mustEqual(x.remove(), y.remove()); |
921 |
jsr166 |
1.24 |
} |
922 |
|
|
assertTrue(y.isEmpty()); |
923 |
jsr166 |
1.5 |
} |
924 |
dl |
1.1 |
|
925 |
jsr166 |
1.29 |
/** |
926 |
jsr166 |
1.43 |
* A cloned deque has same elements in same order |
927 |
|
|
*/ |
928 |
|
|
public void testClone() throws Exception { |
929 |
dl |
1.59 |
ArrayDeque<Item> x = populatedDeque(SIZE); |
930 |
|
|
ArrayDeque<Item> y = x.clone(); |
931 |
jsr166 |
1.43 |
|
932 |
|
|
assertNotSame(y, x); |
933 |
dl |
1.59 |
mustEqual(x.size(), y.size()); |
934 |
|
|
mustEqual(x.toString(), y.toString()); |
935 |
jsr166 |
1.43 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
936 |
|
|
while (!x.isEmpty()) { |
937 |
|
|
assertFalse(y.isEmpty()); |
938 |
dl |
1.59 |
mustEqual(x.remove(), y.remove()); |
939 |
jsr166 |
1.43 |
} |
940 |
|
|
assertTrue(y.isEmpty()); |
941 |
|
|
} |
942 |
|
|
|
943 |
|
|
/** |
944 |
jsr166 |
1.29 |
* remove(null), contains(null) always return false |
945 |
|
|
*/ |
946 |
|
|
public void testNeverContainsNull() { |
947 |
|
|
Deque<?>[] qs = { |
948 |
jsr166 |
1.60 |
new ArrayDeque<>(), |
949 |
jsr166 |
1.29 |
populatedDeque(2), |
950 |
|
|
}; |
951 |
|
|
|
952 |
|
|
for (Deque<?> q : qs) { |
953 |
|
|
assertFalse(q.contains(null)); |
954 |
|
|
assertFalse(q.remove(null)); |
955 |
|
|
assertFalse(q.removeFirstOccurrence(null)); |
956 |
|
|
assertFalse(q.removeLastOccurrence(null)); |
957 |
|
|
} |
958 |
|
|
} |
959 |
|
|
|
960 |
dl |
1.1 |
} |