StreamReuseTest.java revision a405b7ea164e472bcf6b75d9890021bd82e4d60d
1/* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23package java.util.stream; 24 25import org.testng.annotations.Test; 26 27import java.util.function.Function; 28 29import static org.testng.Assert.fail; 30 31/** 32 * StreamReuseTest 33 * 34 * @author Brian Goetz 35 */ 36@Test 37public class StreamReuseTest { 38 39 private <T, U, E, S extends BaseStream<E, S>, D extends TestData<E, S>> void assertSecondFails( 40 D data, 41 Function<S, T> first, 42 Function<S, U> second, 43 Class<? extends Throwable> exception, 44 String text) { 45 S stream = data.stream(); 46 T fr = first.apply(stream); 47 try { 48 U sr = second.apply(stream); 49 fail(text + " (seq)"); 50 } 51 catch (Throwable e) { 52 if (exception.isAssignableFrom(e.getClass())) { 53 // Expected 54 } 55 else if (e instanceof Error) 56 throw (Error) e; 57 else if (e instanceof RuntimeException) 58 throw (RuntimeException) e; 59 else 60 throw new AssertionError("Unexpected exception " + e.getClass(), e); 61 } 62 63 stream = data.parallelStream(); 64 fr = first.apply(stream); 65 try { 66 U sr = second.apply(stream); 67 fail(text + " (par)"); 68 } 69 catch (Throwable e) { 70 if (exception.isAssignableFrom(e.getClass())) { 71 // Expected 72 } 73 else if (e instanceof Error) 74 throw (Error) e; 75 else if (e instanceof RuntimeException) 76 throw (RuntimeException) e; 77 else 78 throw new AssertionError("Unexpected exception " + e.getClass(), e); 79 } 80 } 81 82 // Stream 83 84 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 85 public void testTwoStreams(String name, TestData<Integer, Stream<Integer>> data) { 86 assertSecondFails(data, 87 (Stream<Integer> s) -> s.map(i -> i), (Stream<Integer> s) -> s.map(i -> i), 88 IllegalStateException.class, 89 "Stream map / map succeeded erroneously"); 90 assertSecondFails(data, 91 Stream::distinct, (Stream<Integer> s) -> s.map(i -> i), 92 IllegalStateException.class, 93 "Stream distinct / map succeeded erroneously"); 94 assertSecondFails(data, 95 (Stream<Integer> s) -> s.map(i -> i), Stream::distinct, 96 IllegalStateException.class, 97 "Stream map / distinct succeeded erroneously"); 98 assertSecondFails(data, 99 Stream::distinct, Stream::distinct, 100 IllegalStateException.class, 101 "Stream distinct / distinct succeeded erroneously"); 102 } 103 104 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 105 public void testTwoTerminals(String name, TestData<Integer, Stream<Integer>> data) { 106 assertSecondFails(data, 107 Stream::findFirst, Stream::findFirst, 108 IllegalStateException.class, 109 "Stream findFirst / findFirst succeeded erroneously"); 110 } 111 112 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 113 public void testTerminalStream(String name, TestData<Integer, Stream<Integer>> data) { 114 assertSecondFails(data, 115 Stream::findFirst, (Stream<Integer> s) -> s.map(i -> i), 116 IllegalStateException.class, 117 "Stream findFirst / map succeeded erroneously"); 118 assertSecondFails(data, 119 (Stream<Integer> s) -> s.map(i -> i), Stream::findFirst, 120 IllegalStateException.class, 121 "Stream map / findFirst succeeded erroneously"); 122 assertSecondFails(data, 123 Stream::findFirst, Stream::distinct, 124 IllegalStateException.class, 125 "Stream findFirst / distinct succeeded erroneously"); 126 assertSecondFails(data, 127 Stream::distinct, Stream::findFirst, 128 IllegalStateException.class, 129 "Stream distinct / findFirst succeeded erroneously"); 130 } 131 132 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 133 public void testTwoIterators(String name, TestData<Integer, Stream<Integer>> data) { 134 assertSecondFails(data, 135 Stream::iterator, Stream::iterator, 136 IllegalStateException.class, 137 "Stream iterator / iterator succeeded erroneously"); 138 } 139 140 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 141 public void testTerminalIterator(String name, TestData<Integer, Stream<Integer>> data) { 142 assertSecondFails(data, 143 Stream::iterator, Stream::findFirst, 144 IllegalStateException.class, 145 "Stream iterator / findFirst succeeded erroneously"); 146 assertSecondFails(data, 147 Stream::findFirst, Stream::iterator, 148 IllegalStateException.class, 149 "Stream findFirst / iterator succeeded erroneously"); 150 } 151 152 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 153 public void testStreamIterator(String name, TestData<Integer, Stream<Integer>> data) { 154 assertSecondFails(data, 155 Stream::iterator, (Stream<Integer> s) -> s.map(i -> i), 156 IllegalStateException.class, 157 "Stream iterator / map succeeded erroneously"); 158 assertSecondFails(data, 159 (Stream<Integer> s) -> s.map(i -> i), Stream::iterator, 160 IllegalStateException.class, 161 "Stream map / iterator succeeded erroneously"); 162 assertSecondFails(data, 163 Stream::iterator, Stream::distinct, 164 IllegalStateException.class, 165 "Stream iterator / distinct succeeded erroneously"); 166 assertSecondFails(data, 167 Stream::distinct, Stream::iterator, 168 IllegalStateException.class, 169 "Stream distinct / iterator succeeded erroneously"); 170 } 171 172 // IntStream 173 174 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 175 public void testTwoStreams(String name, TestData.OfInt data) { 176 assertSecondFails(data, 177 (IntStream s) -> s.mapToObj(i -> i), (IntStream s) -> s.mapToObj(i -> i), 178 IllegalStateException.class, 179 "IntStream map / map succeeded erroneously"); 180 assertSecondFails(data, 181 IntStream::distinct, (IntStream s) -> s.mapToObj(i -> i), 182 IllegalStateException.class, 183 "IntStream distinct / map succeeded erroneously"); 184 assertSecondFails(data, 185 (IntStream s) -> s.mapToObj(i -> i), IntStream::distinct, 186 IllegalStateException.class, 187 "IntStream map / distinct succeeded erroneously"); 188 assertSecondFails(data, 189 IntStream::distinct, IntStream::distinct, 190 IllegalStateException.class, 191 "IntStream distinct / distinct succeeded erroneously"); 192 } 193 194 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 195 public void testTwoTerminals(String name, TestData.OfInt data) { 196 assertSecondFails(data, 197 IntStream::sum, IntStream::sum, 198 IllegalStateException.class, 199 "IntStream sum / sum succeeded erroneously"); 200 } 201 202 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 203 public void testTerminalStream(String name, TestData.OfInt data) { 204 assertSecondFails(data, 205 IntStream::sum, (IntStream s) -> s.mapToObj(i -> i), 206 IllegalStateException.class, 207 "IntStream sum / map succeeded erroneously"); 208 assertSecondFails(data, 209 (IntStream s) -> s.mapToObj(i -> i), IntStream::sum, 210 IllegalStateException.class, 211 "IntStream map / sum succeeded erroneously"); 212 assertSecondFails(data, 213 IntStream::sum, IntStream::distinct, 214 IllegalStateException.class, 215 "IntStream sum / distinct succeeded erroneously"); 216 assertSecondFails(data, 217 IntStream::distinct, IntStream::sum, 218 IllegalStateException.class, 219 "IntStream distinct / sum succeeded erroneously"); 220 } 221 222 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 223 public void testTwoIterators(String name, TestData.OfInt data) { 224 assertSecondFails(data, 225 IntStream::iterator, IntStream::iterator, 226 IllegalStateException.class, 227 "IntStream iterator / iterator succeeded erroneously"); 228 } 229 230 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 231 public void testTerminalIterator(String name, TestData.OfInt data) { 232 assertSecondFails(data, 233 IntStream::iterator, IntStream::sum, 234 IllegalStateException.class, 235 "IntStream iterator / sum succeeded erroneously"); 236 assertSecondFails(data, 237 IntStream::sum, IntStream::iterator, 238 IllegalStateException.class, 239 "Stream sum / iterator succeeded erroneously"); 240 } 241 242 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 243 public void testStreamIterator(String name, TestData.OfInt data) { 244 assertSecondFails(data, 245 IntStream::iterator, (IntStream s) -> s.mapToObj(i -> i), 246 IllegalStateException.class, 247 "IntStream iterator / map succeeded erroneously"); 248 assertSecondFails(data, 249 (IntStream s) -> s.mapToObj(i -> i), IntStream::iterator, 250 IllegalStateException.class, 251 "IntStream map / iterator succeeded erroneously"); 252 assertSecondFails(data, 253 IntStream::iterator, IntStream::distinct, 254 IllegalStateException.class, 255 "IntStream iterator / distinct succeeded erroneously"); 256 assertSecondFails(data, 257 IntStream::distinct, IntStream::iterator, 258 IllegalStateException.class, 259 "IntStream distinct / iterator succeeded erroneously"); 260 } 261 262 // LongStream 263 264 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 265 public void testTwoStreams(String name, TestData.OfLong data) { 266 assertSecondFails(data, 267 (LongStream s) -> s.mapToObj(i -> i), (LongStream s) -> s.mapToObj(i -> i), 268 IllegalStateException.class, 269 "LongStream map / map succeeded erroneously"); 270 assertSecondFails(data, 271 LongStream::distinct, (LongStream s) -> s.mapToObj(i -> i), 272 IllegalStateException.class, 273 "LongStream distinct / map succeeded erroneously"); 274 assertSecondFails(data, 275 (LongStream s) -> s.mapToObj(i -> i), LongStream::distinct, 276 IllegalStateException.class, 277 "LongStream map / distinct succeeded erroneously"); 278 assertSecondFails(data, 279 LongStream::distinct, LongStream::distinct, 280 IllegalStateException.class, 281 "LongStream distinct / distinct succeeded erroneously"); 282 } 283 284 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 285 public void testTwoTerminals(String name, TestData.OfLong data) { 286 assertSecondFails(data, 287 LongStream::sum, LongStream::sum, 288 IllegalStateException.class, 289 "LongStream sum / sum succeeded erroneously"); 290 } 291 292 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 293 public void testTerminalStream(String name, TestData.OfLong data) { 294 assertSecondFails(data, 295 LongStream::sum, (LongStream s) -> s.mapToObj(i -> i), 296 IllegalStateException.class, 297 "LongStream sum / map succeeded erroneously"); 298 assertSecondFails(data, 299 (LongStream s) -> s.mapToObj(i -> i), LongStream::sum, 300 IllegalStateException.class, 301 "LongStream map / sum succeeded erroneously"); 302 assertSecondFails(data, 303 LongStream::sum, LongStream::distinct, 304 IllegalStateException.class, 305 "LongStream sum / distinct succeeded erroneously"); 306 assertSecondFails(data, 307 LongStream::distinct, LongStream::sum, 308 IllegalStateException.class, 309 "LongStream distinct / sum succeeded erroneously"); 310 } 311 312 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 313 public void testTwoIterators(String name, TestData.OfLong data) { 314 assertSecondFails(data, 315 LongStream::iterator, LongStream::iterator, 316 IllegalStateException.class, 317 "LongStream iterator / iterator succeeded erroneously"); 318 } 319 320 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 321 public void testTerminalIterator(String name, TestData.OfLong data) { 322 assertSecondFails(data, 323 LongStream::iterator, LongStream::sum, 324 IllegalStateException.class, 325 "LongStream iterator / sum succeeded erroneously"); 326 assertSecondFails(data, 327 LongStream::sum, LongStream::iterator, 328 IllegalStateException.class, 329 "Stream sum / iterator succeeded erroneously"); 330 } 331 332 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 333 public void testStreamIterator(String name, TestData.OfLong data) { 334 assertSecondFails(data, 335 LongStream::iterator, (LongStream s) -> s.mapToObj(i -> i), 336 IllegalStateException.class, 337 "LongStream iterator / map succeeded erroneously"); 338 assertSecondFails(data, 339 (LongStream s) -> s.mapToObj(i -> i), LongStream::iterator, 340 IllegalStateException.class, 341 "LongStream map / iterator succeeded erroneously"); 342 assertSecondFails(data, 343 LongStream::iterator, LongStream::distinct, 344 IllegalStateException.class, 345 "LongStream iterator / distinct succeeded erroneously"); 346 assertSecondFails(data, 347 LongStream::distinct, LongStream::iterator, 348 IllegalStateException.class, 349 "LongStream distinct / iterator succeeded erroneously"); 350 } 351 352 // DoubleStream 353 354 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 355 public void testTwoStreams(String name, TestData.OfDouble data) { 356 assertSecondFails(data, 357 (DoubleStream s) -> s.mapToObj(i -> i), (DoubleStream s) -> s.mapToObj(i -> i), 358 IllegalStateException.class, 359 "DoubleStream map / map succeeded erroneously"); 360 assertSecondFails(data, 361 DoubleStream::distinct, (DoubleStream s) -> s.mapToObj(i -> i), 362 IllegalStateException.class, 363 "DoubleStream distinct / map succeeded erroneously"); 364 assertSecondFails(data, 365 (DoubleStream s) -> s.mapToObj(i -> i), DoubleStream::distinct, 366 IllegalStateException.class, 367 "DoubleStream map / distinct succeeded erroneously"); 368 assertSecondFails(data, 369 DoubleStream::distinct, DoubleStream::distinct, 370 IllegalStateException.class, 371 "DoubleStream distinct / distinct succeeded erroneously"); 372 } 373 374 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 375 public void testTwoTerminals(String name, TestData.OfDouble data) { 376 assertSecondFails(data, 377 DoubleStream::sum, DoubleStream::sum, 378 IllegalStateException.class, 379 "DoubleStream sum / sum succeeded erroneously"); 380 } 381 382 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 383 public void testTerminalStream(String name, TestData.OfDouble data) { 384 assertSecondFails(data, 385 DoubleStream::sum, (DoubleStream s) -> s.mapToObj(i -> i), 386 IllegalStateException.class, 387 "DoubleStream sum / map succeeded erroneously"); 388 assertSecondFails(data, 389 (DoubleStream s) -> s.mapToObj(i -> i), DoubleStream::sum, 390 IllegalStateException.class, 391 "DoubleStream map / sum succeeded erroneously"); 392 assertSecondFails(data, 393 DoubleStream::sum, DoubleStream::distinct, 394 IllegalStateException.class, 395 "DoubleStream sum / distinct succeeded erroneously"); 396 assertSecondFails(data, 397 DoubleStream::distinct, DoubleStream::sum, 398 IllegalStateException.class, 399 "DoubleStream distinct / sum succeeded erroneously"); 400 } 401 402 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 403 public void testTwoIterators(String name, TestData.OfDouble data) { 404 assertSecondFails(data, 405 DoubleStream::iterator, DoubleStream::iterator, 406 IllegalStateException.class, 407 "DoubleStream iterator / iterator succeeded erroneously"); 408 } 409 410 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 411 public void testTerminalIterator(String name, TestData.OfDouble data) { 412 assertSecondFails(data, 413 DoubleStream::iterator, DoubleStream::sum, 414 IllegalStateException.class, 415 "DoubleStream iterator / sum succeeded erroneously"); 416 assertSecondFails(data, 417 DoubleStream::sum, DoubleStream::iterator, 418 IllegalStateException.class, 419 "Stream sum / iterator succeeded erroneously"); 420 } 421 422 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 423 public void testStreamIterator(String name, TestData.OfDouble data) { 424 assertSecondFails(data, 425 DoubleStream::iterator, (DoubleStream s) -> s.mapToObj(i -> i), 426 IllegalStateException.class, 427 "DoubleStream iterator / map succeeded erroneously"); 428 assertSecondFails(data, 429 (DoubleStream s) -> s.mapToObj(i -> i), DoubleStream::iterator, 430 IllegalStateException.class, 431 "DoubleStream map / iterator succeeded erroneously"); 432 assertSecondFails(data, 433 DoubleStream::iterator, DoubleStream::distinct, 434 IllegalStateException.class, 435 "DoubleStream iterator / distinct succeeded erroneously"); 436 assertSecondFails(data, 437 DoubleStream::distinct, DoubleStream::iterator, 438 IllegalStateException.class, 439 "DoubleStream distinct / iterator succeeded erroneously"); 440 } 441} 442