1/* 2 * Copyright (c) 2014, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package jdk.nashorn.internal.runtime.test; 26 27import static org.testng.Assert.assertEquals; 28import static org.testng.Assert.assertFalse; 29import static org.testng.Assert.assertTrue; 30import java.io.File; 31import java.io.IOException; 32import java.nio.file.DirectoryStream; 33import java.nio.file.FileSystems; 34import java.nio.file.Files; 35import java.nio.file.Path; 36import javax.script.ScriptEngine; 37import javax.script.ScriptException; 38import jdk.nashorn.api.scripting.NashornScriptEngineFactory; 39import org.testng.annotations.Test; 40 41/** 42 * @test 43 * @bug 8039185 8039403 44 * @summary Test for persistent code cache and path handling 45 * @run testng jdk.nashorn.internal.runtime.test.CodeStoreAndPathTest 46 */ 47@SuppressWarnings("javadoc") 48public class CodeStoreAndPathTest { 49 50 final static String code1 = "var code1; var x = 'Hello Script'; var x1 = 'Hello Script'; " 51 + "var x2 = 'Hello Script'; var x3 = 'Hello Script'; " 52 + "var x4 = 'Hello Script'; var x5 = 'Hello Script';" 53 + "var x6 = 'Hello Script'; var x7 = 'Hello Script'; " 54 + "var x8 = 'Hello Script'; var x9 = 'Hello Script'; " 55 + "var x10 = 'Hello Script';" 56 + "function f() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 57 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 58 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 59 + "var x10 = 'Hello Script';}" 60 + "function g() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 61 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 62 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 63 + "var x10 = 'Hello Script';}" 64 + "function h() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 65 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 66 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 67 + "var x10 = 'Hello Script';}" 68 + "function i() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 69 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 70 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 71 + "var x10 = 'Hello Script';}"; 72 final static String code2 = "var code2; var x = 'Hello Script'; var x1 = 'Hello Script'; " 73 + "var x2 = 'Hello Script'; var x3 = 'Hello Script'; " 74 + "var x4 = 'Hello Script'; var x5 = 'Hello Script';" 75 + "var x6 = 'Hello Script'; var x7 = 'Hello Script'; " 76 + "var x8 = 'Hello Script'; var x9 = 'Hello Script'; " 77 + "var x10 = 'Hello Script';" 78 + "function f() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 79 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 80 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 81 + "var x10 = 'Hello Script';}" 82 + "function g() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 83 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 84 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 85 + "var x10 = 'Hello Script';}" 86 + "function h() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 87 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 88 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 89 + "var x10 = 'Hello Script';}" 90 + "function i() {x ='Bye Script'; x1 ='Bye Script'; x2='Bye Script';" 91 + "x3='Bye Script'; x4='Bye Script'; x5='Bye Script'; x6='Bye Script';" 92 + "x7='Bye Script'; x8='Bye Script'; var x9 = 'Hello Script'; " 93 + "var x10 = 'Hello Script';}"; 94 // Script size < Default minimum size for storing a compiled script class 95 final static String code3 = "var code3; var x = 'Hello Script'; var x1 = 'Hello Script'; "; 96 final static String nestedFunctions = "\n" + 97 "(function outer() { \n" + 98 " var map = null; \n" + 99 " (function inner() { \n" + 100 " var object; \n" + 101 " if (map === null) { \n" + 102 " map = (function() { \n" + 103 " var HashMap = Java.type('java.util.HashMap'); \n" + 104 " map = new HashMap(); \n" + 105 " map.name = 'name'; \n" + 106 " map.id = 1234;\n" + 107 " map.basePath = 'basePath'; \n" + 108 " map.extensionPath = 'extension';\n" + 109 " map.address = 'address'; \n" + 110 " map.name = 'name'; \n" + 111 " map.id = 1234;\n" + 112 " map.basePath = 'basePath'; \n" + 113 " map.extensionPath = 'extension';\n" + 114 " map.address = 'address';\n" + 115 " map.name = 'name'; \n" + 116 " map.id = 1234;\n" + 117 " map.basePath = 'basePath'; \n" + 118 " map.extensionPath = 'extension';\n" + 119 " map.address = 'address'; \n" + 120 " return map; \n" + 121 " }()); \n" + 122 " } \n" + 123 " object = {}; \n" + 124 " return object; \n" + 125 " })(); \n" + 126 "}()); "; 127 final static String longNestedFunctions = "\n" + 128 "(function outer() { \n" + 129 " var map = null; \n" + 130 " (function inner() { \n" + 131 " var object; \n" + 132 " var HashMap = Java.type('java.util.HashMap'); \n" + 133 " map = new HashMap(); \n" + 134 " map.name = 'name'; \n" + 135 " map.id = 1234;\n" + 136 " map.basePath = 'basePath'; \n" + 137 " map.extensionPath = 'extension';\n" + 138 " map.address = 'address'; \n" + 139 " map.name = 'name'; \n" + 140 " map.id = 1234;\n" + 141 " map.basePath = 'basePath'; \n" + 142 " map.extensionPath = 'extension';\n" + 143 " map.address = 'address';\n" + 144 " map.name = 'name'; \n" + 145 " map.id = 1234;\n" + 146 " map.basePath = 'basePath'; \n" + 147 " map.extensionPath = 'extension';\n" + 148 " map.address = 'address'; \n" + 149 " map.name = 'name'; \n" + 150 " map.id = 1234;\n" + 151 " map.basePath = 'basePath'; \n" + 152 " map.extensionPath = 'extension';\n" + 153 " map.address = 'address'; \n" + 154 " map.name = 'name'; \n" + 155 " map.id = 1234;\n" + 156 " map.basePath = 'basePath'; \n" + 157 " map.extensionPath = 'extension';\n" + 158 " map.address = 'address';\n" + 159 " map.name = 'name'; \n" + 160 " map.id = 1234;\n" + 161 " map.basePath = 'basePath'; \n" + 162 " map.extensionPath = 'extension';\n" + 163 " map.address = 'address'; \n" + 164 " map.name = 'name'; \n" + 165 " map.id = 1234;\n" + 166 " map.basePath = 'basePath'; \n" + 167 " map.extensionPath = 'extension';\n" + 168 " map.address = 'address'; \n" + 169 " map.name = 'name'; \n" + 170 " map.id = 1234;\n" + 171 " map.basePath = 'basePath'; \n" + 172 " map.extensionPath = 'extension';\n" + 173 " map.address = 'address';\n" + 174 " map.name = 'name'; \n" + 175 " map.id = 1234;\n" + 176 " map.basePath = 'basePath'; \n" + 177 " map.extensionPath = 'extension';\n" + 178 " map.address = 'address'; \n" + 179 " map.name = 'name'; \n" + 180 " map.id = 1234;\n" + 181 " map.basePath = 'basePath'; \n" + 182 " map.extensionPath = 'extension';\n" + 183 " map.address = 'address'; \n" + 184 " map.name = 'name'; \n" + 185 " map.id = 1234;\n" + 186 " map.basePath = 'basePath'; \n" + 187 " map.extensionPath = 'extension';\n" + 188 " map.address = 'address';\n" + 189 " map.name = 'name'; \n" + 190 " map.id = 1234;\n" + 191 " map.basePath = 'basePath'; \n" + 192 " map.extensionPath = 'extension';\n" + 193 " map.address = 'address'; \n" + 194 " map.name = 'name'; \n" + 195 " map.id = 1234;\n" + 196 " map.basePath = 'basePath'; \n" + 197 " map.extensionPath = 'extension';\n" + 198 " map.address = 'address'; \n" + 199 " map.name = 'name'; \n" + 200 " map.id = 1234;\n" + 201 " map.basePath = 'basePath'; \n" + 202 " map.extensionPath = 'extension';\n" + 203 " map.address = 'address';\n" + 204 " map.name = 'name'; \n" + 205 " map.id = 1234;\n" + 206 " map.basePath = 'basePath'; \n" + 207 " map.extensionPath = 'extension';\n" + 208 " map.address = 'address'; \n" + 209 " map.name = 'name'; \n" + 210 " map.id = 1234;\n" + 211 " map.basePath = 'basePath'; \n" + 212 " map.extensionPath = 'extension';\n" + 213 " map.address = 'address'; \n" + 214 " map.name = 'name'; \n" + 215 " map.id = 1234;\n" + 216 " map.basePath = 'basePath'; \n" + 217 " map.extensionPath = 'extension';\n" + 218 " map.address = 'address';\n" + 219 " map.name = 'name'; \n" + 220 " map.id = 1234;\n" + 221 " map.basePath = 'basePath'; \n" + 222 " map.extensionPath = 'extension';\n" + 223 " map.address = 'address'; \n" + 224 " map.name = 'name'; \n" + 225 " map.id = 1234;\n" + 226 " map.basePath = 'basePath'; \n" + 227 " map.extensionPath = 'extension';\n" + 228 " map.address = 'address'; \n" + 229 " map.name = 'name'; \n" + 230 " map.id = 1234;\n" + 231 " map.basePath = 'basePath'; \n" + 232 " map.extensionPath = 'extension';\n" + 233 " map.address = 'address';\n" + 234 " map.name = 'name'; \n" + 235 " map.id = 1234;\n" + 236 " map.basePath = 'basePath'; \n" + 237 " map.extensionPath = 'extension';\n" + 238 " map.address = 'address'; \n" + 239 " map.name = 'name'; \n" + 240 " map.id = 1234;\n" + 241 " map.basePath = 'basePath'; \n" + 242 " map.extensionPath = 'extension';\n" + 243 " map.address = 'address'; \n" + 244 " map.name = 'name'; \n" + 245 " map.id = 1234;\n" + 246 " map.basePath = 'basePath'; \n" + 247 " map.extensionPath = 'extension';\n" + 248 " map.address = 'address';\n" + 249 " map.name = 'name'; \n" + 250 " map.id = 1234;\n" + 251 " map.basePath = 'basePath'; \n" + 252 " map.extensionPath = 'extension';\n" + 253 " map.address = 'address'; \n" + 254 " map.name = 'name'; \n" + 255 " map.id = 1234;\n" + 256 " map.basePath = 'basePath'; \n" + 257 " map.extensionPath = 'extension';\n" + 258 " map.address = 'address'; \n" + 259 " map.name = 'name'; \n" + 260 " map.id = 1234;\n" + 261 " map.basePath = 'basePath'; \n" + 262 " map.extensionPath = 'extension';\n" + 263 " map.address = 'address';\n" + 264 " map.name = 'name'; \n" + 265 " map.id = 1234;\n" + 266 " map.basePath = 'basePath'; \n" + 267 " map.extensionPath = 'extension';\n" + 268 " map.address = 'address'; \n" + 269 " map.name = 'name'; \n" + 270 " map.id = 1234;\n" + 271 " map.basePath = 'basePath'; \n" + 272 " map.extensionPath = 'extension';\n" + 273 " map.address = 'address'; \n" + 274 " map.name = 'name'; \n" + 275 " map.id = 1234;\n" + 276 " map.basePath = 'basePath'; \n" + 277 " map.extensionPath = 'extension';\n" + 278 " map.address = 'address';\n" + 279 " map.name = 'name'; \n" + 280 " map.id = 1234;\n" + 281 " map.basePath = 'basePath'; \n" + 282 " map.extensionPath = 'extension';\n" + 283 " map.address = 'address'; \n" + 284 " map.name = 'name'; \n" + 285 " map.id = 1234;\n" + 286 " map.basePath = 'basePath'; \n" + 287 " map.extensionPath = 'extension';\n" + 288 " map.address = 'address'; \n" + 289 " map.name = 'name'; \n" + 290 " map.id = 1234;\n" + 291 " map.basePath = 'basePath'; \n" + 292 " map.extensionPath = 'extension';\n" + 293 " map.address = 'address';\n" + 294 " map.name = 'name'; \n" + 295 " map.id = 1234;\n" + 296 " map.basePath = 'basePath'; \n" + 297 " map.extensionPath = 'extension';\n" + 298 " map.address = 'address'; \n" + 299 " map.name = 'name'; \n" + 300 " map.id = 1234;\n" + 301 " map.basePath = 'basePath'; \n" + 302 " map.extensionPath = 'extension';\n" + 303 " map.address = 'address'; \n" + 304 " map.name = 'name'; \n" + 305 " map.id = 1234;\n" + 306 " map.basePath = 'basePath'; \n" + 307 " map.extensionPath = 'extension';\n" + 308 " map.address = 'address';\n" + 309 " map.name = 'name'; \n" + 310 " map.id = 1234;\n" + 311 " map.basePath = 'basePath'; \n" + 312 " map.extensionPath = 'extension';\n" + 313 " map.address = 'address'; \n" + 314 " map.name = 'name'; \n" + 315 " map.id = 1234;\n" + 316 " map.basePath = 'basePath'; \n" + 317 " map.extensionPath = 'extension';\n" + 318 " map.address = 'address'; \n" + 319 " map.name = 'name'; \n" + 320 " map.id = 1234;\n" + 321 " map.basePath = 'basePath'; \n" + 322 " map.extensionPath = 'extension';\n" + 323 " map.address = 'address';\n" + 324 " map.name = 'name'; \n" + 325 " map.id = 1234;\n" + 326 " map.basePath = 'basePath'; \n" + 327 " map.extensionPath = 'extension';\n" + 328 " map.address = 'address'; \n" + 329 " map.name = 'name'; \n" + 330 " map.id = 1234;\n" + 331 " map.basePath = 'basePath'; \n" + 332 " map.extensionPath = 'extension';\n" + 333 " map.address = 'address'; \n" + 334 " map.name = 'name'; \n" + 335 " map.id = 1234;\n" + 336 " map.basePath = 'basePath'; \n" + 337 " map.extensionPath = 'extension';\n" + 338 " map.address = 'address';\n" + 339 " map.name = 'name'; \n" + 340 " map.id = 1234;\n" + 341 " map.basePath = 'basePath'; \n" + 342 " map.extensionPath = 'extension';\n" + 343 " map.address = 'address'; \n" + 344 " map.name = 'name'; \n" + 345 " map.id = 1234;\n" + 346 " map.basePath = 'basePath'; \n" + 347 " map.extensionPath = 'extension';\n" + 348 " map.address = 'address'; \n" + 349 " map.name = 'name'; \n" + 350 " map.id = 1234;\n" + 351 " map.basePath = 'basePath'; \n" + 352 " map.extensionPath = 'extension';\n" + 353 " map.address = 'address';\n" + 354 " map.name = 'name'; \n" + 355 " map.id = 1234;\n" + 356 " map.basePath = 'basePath'; \n" + 357 " map.extensionPath = 'extension';\n" + 358 " map.address = 'address'; \n" + 359 " map.name = 'name'; \n" + 360 " map.id = 1234;\n" + 361 " map.basePath = 'basePath'; \n" + 362 " map.extensionPath = 'extension';\n" + 363 " map.address = 'address'; \n" + 364 " map.name = 'name'; \n" + 365 " map.id = 1234;\n" + 366 " map.basePath = 'basePath'; \n" + 367 " map.extensionPath = 'extension';\n" + 368 " map.address = 'address';\n" + 369 " map.name = 'name'; \n" + 370 " map.id = 1234;\n" + 371 " map.basePath = 'basePath'; \n" + 372 " map.extensionPath = 'extension';\n" + 373 " map.address = 'address'; \n" + 374 " map.name = 'name'; \n" + 375 " map.id = 1234;\n" + 376 " map.basePath = 'basePath'; \n" + 377 " map.extensionPath = 'extension';\n" + 378 " map.address = 'address'; \n" + 379 " map.name = 'name'; \n" + 380 " map.id = 1234;\n" + 381 " map.basePath = 'basePath'; \n" + 382 " map.extensionPath = 'extension';\n" + 383 " map.address = 'address';\n" + 384 " map.name = 'name'; \n" + 385 " map.id = 1234;\n" + 386 " map.basePath = 'basePath'; \n" + 387 " map.extensionPath = 'extension';\n" + 388 " map.address = 'address'; \n" + 389 " object = {}; \n" + 390 " return object; \n" + 391 " })(); \n" + 392 "}()); "; 393 final static String codeCache = "build/nashorn_code_cache"; 394 final static String oldUserDir = System.getProperty("user.dir"); 395 396 private static final String[] ENGINE_OPTIONS_OPT = new String[]{"--persistent-code-cache", "--optimistic-types=true"}; 397 private static final String[] ENGINE_OPTIONS_NOOPT = new String[]{"--persistent-code-cache", "--optimistic-types=false"}; 398 399 @Test 400 public void pathHandlingTest() { 401 System.setProperty("nashorn.persistent.code.cache", codeCache); 402 final NashornScriptEngineFactory fac = new NashornScriptEngineFactory(); 403 404 fac.getScriptEngine(ENGINE_OPTIONS_NOOPT); 405 406 final Path expectedCodeCachePath = FileSystems.getDefault().getPath(oldUserDir + File.separator + codeCache); 407 final Path actualCodeCachePath = FileSystems.getDefault().getPath(System.getProperty( 408 "nashorn.persistent.code.cache")).toAbsolutePath(); 409 // Check that nashorn code cache is created in current working directory 410 assertEquals(actualCodeCachePath, expectedCodeCachePath); 411 // Check that code cache dir exists and it's not empty 412 final File file = new File(actualCodeCachePath.toUri()); 413 assertTrue(file.exists(), "No code cache directory was created!"); 414 assertTrue(file.isDirectory(), "Code cache location is not a directory!"); 415 assertFalse(file.list().length == 0, "Code cache directory is empty!"); 416 } 417 418 @Test 419 public void changeUserDirTest() throws ScriptException, IOException { 420 System.setProperty("nashorn.persistent.code.cache", codeCache); 421 final NashornScriptEngineFactory fac = new NashornScriptEngineFactory(); 422 final ScriptEngine e = fac.getScriptEngine(ENGINE_OPTIONS_NOOPT); 423 final Path codeCachePath = getCodeCachePath(false); 424 final String newUserDir = "build/newUserDir"; 425 // Now changing current working directory 426 System.setProperty("user.dir", System.getProperty("user.dir") + File.separator + newUserDir); 427 try { 428 // Check that a new compiled script is stored in existing code cache 429 e.eval(code1); 430 final DirectoryStream<Path> stream = Files.newDirectoryStream(codeCachePath); 431 checkCompiledScripts(stream, 1); 432 // Setting to default current working dir 433 } finally { 434 System.setProperty("user.dir", oldUserDir); 435 } 436 } 437 438 @Test 439 public void codeCacheTest() throws ScriptException, IOException { 440 System.setProperty("nashorn.persistent.code.cache", codeCache); 441 final NashornScriptEngineFactory fac = new NashornScriptEngineFactory(); 442 final ScriptEngine e = fac.getScriptEngine(ENGINE_OPTIONS_NOOPT); 443 final Path codeCachePath = getCodeCachePath(false); 444 e.eval(code1); 445 e.eval(code2); 446 e.eval(code3);// less than minimum size for storing 447 // adding code1 and code2. 448 final DirectoryStream<Path> stream = Files.newDirectoryStream(codeCachePath); 449 checkCompiledScripts(stream, 2); 450 } 451 452 @Test 453 public void codeCacheTestOpt() throws ScriptException, IOException { 454 System.setProperty("nashorn.persistent.code.cache", codeCache); 455 final NashornScriptEngineFactory fac = new NashornScriptEngineFactory(); 456 final ScriptEngine e = fac.getScriptEngine(ENGINE_OPTIONS_OPT); 457 final Path codeCachePath = getCodeCachePath(true); 458 e.eval(code1); 459 e.eval(code2); 460 e.eval(code3);// less than minimum size for storing 461 // adding code1 and code2. 462 final DirectoryStream<Path> stream = Files.newDirectoryStream(codeCachePath); 463 checkCompiledScripts(stream, 4); 464 } 465 466 @Test 467 public void testNestedFunctionStore() throws ScriptException, IOException { 468 System.setProperty("nashorn.persistent.code.cache", codeCache); 469 final NashornScriptEngineFactory factory = new NashornScriptEngineFactory(); 470 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(nestedFunctions); 471 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(nestedFunctions); 472 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(nestedFunctions); 473 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(nestedFunctions); 474 } 475 476 @Test 477 public void testSplitFunctionStore() throws ScriptException, IOException { 478 System.setProperty("nashorn.persistent.code.cache", codeCache); 479 System.setProperty("nashorn.compiler.splitter.threshold", "500"); 480 final NashornScriptEngineFactory factory = new NashornScriptEngineFactory(); 481 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(longNestedFunctions); 482 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(longNestedFunctions); 483 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(longNestedFunctions); 484 factory.getScriptEngine(ENGINE_OPTIONS_OPT).eval(longNestedFunctions); 485 System.getProperties().remove("nashorn.compiler.splitter.threshold"); 486 } 487 488 private static Path getCodeCachePath(final boolean optimistic) { 489 final String codeCache = System.getProperty("nashorn.persistent.code.cache"); 490 final Path codeCachePath = FileSystems.getDefault().getPath(codeCache).toAbsolutePath(); 491 final String[] files = codeCachePath.toFile().list(); 492 for (final String file : files) { 493 if (file.endsWith("_opt") == optimistic) { 494 return codeCachePath.resolve(file); 495 } 496 } 497 throw new AssertionError("Code cache path not found: " + codeCachePath.toString()); 498 } 499 500 private static void checkCompiledScripts(final DirectoryStream<Path> stream, final int numberOfScripts) throws IOException { 501 int n = numberOfScripts; 502 for (@SuppressWarnings("unused") final Path file : stream) { 503 n--; 504 } 505 stream.close(); 506 assertEquals(n, 0); 507 } 508 509} 510