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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of unittest; | |
| 6 | |
| 7 /** | |
| 8 * Returns a matcher that matches empty strings, maps or collections. | |
| 9 */ | |
| 10 const Matcher isEmpty = const _Empty(); | |
| 11 | |
| 12 class _Empty extends BaseMatcher { | |
| 13 const _Empty(); | |
| 14 bool matches(item, MatchState matchState) { | |
| 15 if (item is Map || item is Collection) { | |
| 16 return item.isEmpty; | |
| 17 } else if (item is String) { | |
| 18 return item.length == 0; | |
| 19 } else { | |
| 20 return false; | |
| 21 } | |
| 22 } | |
| 23 Description describe(Description description) => | |
| 24 description.add('empty'); | |
| 25 } | |
| 26 | |
| 27 /** A matcher that matches any null value. */ | |
| 28 const Matcher isNull = const _IsNull(); | |
| 29 | |
| 30 /** A matcher that matches any non-null value. */ | |
| 31 const Matcher isNotNull = const _IsNotNull(); | |
| 32 | |
| 33 class _IsNull extends BaseMatcher { | |
| 34 const _IsNull(); | |
| 35 bool matches(item, MatchState matchState) => item == null; | |
| 36 Description describe(Description description) => | |
| 37 description.add('null'); | |
| 38 } | |
| 39 | |
| 40 class _IsNotNull extends BaseMatcher { | |
| 41 const _IsNotNull(); | |
| 42 bool matches(item, MatchState matchState) => item != null; | |
| 43 Description describe(Description description) => | |
| 44 description.add('not null'); | |
| 45 } | |
| 46 | |
| 47 /** A matcher that matches the Boolean value true. */ | |
| 48 const Matcher isTrue = const _IsTrue(); | |
| 49 | |
| 50 /** A matcher that matches anything except the Boolean value true. */ | |
| 51 const Matcher isFalse = const _IsFalse(); | |
| 52 | |
| 53 class _IsTrue extends BaseMatcher { | |
| 54 const _IsTrue(); | |
| 55 bool matches(item, MatchState matchState) => item == true; | |
| 56 Description describe(Description description) => | |
| 57 description.add('true'); | |
| 58 } | |
| 59 | |
| 60 class _IsFalse extends BaseMatcher { | |
| 61 const _IsFalse(); | |
| 62 bool matches(item, MatchState matchState) => item != true; | |
| 63 Description describe(Description description) => | |
| 64 description.add('false'); | |
| 65 } | |
| 66 | |
| 67 /** | |
| 68 * Returns a matches that matches if the value is the same instance | |
| 69 * as [object] (`===`). | |
| 70 */ | |
| 71 Matcher same(expected) => new _IsSameAs(expected); | |
| 72 | |
| 73 class _IsSameAs extends BaseMatcher { | |
| 74 final _expected; | |
| 75 const _IsSameAs(this._expected); | |
| 76 bool matches(item, MatchState matchState) => item === _expected; | |
| 77 // If all types were hashable we could show a hash here. | |
| 78 Description describe(Description description) => | |
| 79 description.add('same instance as ').addDescriptionOf(_expected); | |
| 80 } | |
| 81 | |
| 82 /** | |
| 83 * Returns a matcher that does a deep recursive match. This only works | |
| 84 * with scalars, Maps and Iterables. To handle cyclic structures a | |
| 85 * recursion depth [limit] can be provided. The default limit is 100. | |
| 86 */ | |
| 87 Matcher equals(expected, [limit=100]) => | |
| 88 new _DeepMatcher(expected, limit); | |
| 89 | |
| 90 class _DeepMatcher extends BaseMatcher { | |
| 91 final _expected; | |
| 92 final int _limit; | |
| 93 var count; | |
| 94 | |
| 95 _DeepMatcher(this._expected, [limit = 1000]) : this._limit = limit; | |
| 96 | |
| 97 String _compareIterables(expected, actual, matcher, depth) { | |
| 98 if (actual is !Iterable) { | |
| 99 return 'is not Iterable'; | |
| 100 } | |
| 101 var expectedIterator = expected.iterator(); | |
| 102 var actualIterator = actual.iterator(); | |
| 103 var position = 0; | |
| 104 String reason = null; | |
| 105 while (reason == null) { | |
| 106 if (expectedIterator.hasNext) { | |
| 107 if (actualIterator.hasNext) { | |
| 108 Description r = matcher(expectedIterator.next(), | |
| 109 actualIterator.next(), | |
| 110 'mismatch at position ${position}', | |
| 111 depth); | |
| 112 if (r != null) reason = r.toString(); | |
| 113 ++position; | |
| 114 } else { | |
| 115 reason = 'shorter than expected'; | |
| 116 } | |
| 117 } else if (actualIterator.hasNext) { | |
| 118 reason = 'longer than expected'; | |
| 119 } else { | |
| 120 return null; | |
| 121 } | |
| 122 } | |
| 123 return reason; | |
| 124 } | |
| 125 | |
| 126 Description _recursiveMatch(expected, actual, String location, int depth) { | |
| 127 Description reason = null; | |
| 128 // If _limit is 1 we can only recurse one level into object. | |
| 129 bool canRecurse = depth == 0 || _limit > 1; | |
| 130 if (expected == actual) { | |
| 131 // Do nothing. | |
| 132 } else if (depth > _limit) { | |
| 133 reason = new StringDescription('recursion depth limit exceeded'); | |
| 134 } else { | |
| 135 if (expected is Iterable && canRecurse) { | |
| 136 String r = _compareIterables(expected, actual, | |
| 137 _recursiveMatch, depth+1); | |
| 138 if (r != null) reason = new StringDescription(r); | |
| 139 } else if (expected is Map && canRecurse) { | |
| 140 if (actual is !Map) { | |
| 141 reason = new StringDescription('expected a map'); | |
| 142 } else if (expected.length != actual.length) { | |
| 143 reason = new StringDescription('different map lengths'); | |
| 144 } else { | |
| 145 for (var key in expected.keys) { | |
| 146 if (!actual.containsKey(key)) { | |
| 147 reason = new StringDescription('missing map key '); | |
| 148 reason.addDescriptionOf(key); | |
| 149 break; | |
| 150 } | |
| 151 reason = _recursiveMatch(expected[key], actual[key], | |
| 152 'with key <${key}> ${location}', depth+1); | |
| 153 if (reason != null) { | |
| 154 break; | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 } else { | |
| 159 // If we have recursed, show the expected value too; if not, | |
| 160 // expect() will show it for us. | |
| 161 reason = new StringDescription(); | |
| 162 if (depth > 1) { | |
| 163 reason.add('expected ').addDescriptionOf(expected).add(' but was '). | |
| 164 addDescriptionOf(actual); | |
| 165 } else { | |
| 166 reason.add('was ').addDescriptionOf(actual); | |
| 167 } | |
| 168 } | |
| 169 } | |
| 170 if (reason != null && location.length > 0) { | |
| 171 reason.add(' ').add(location); | |
| 172 } | |
| 173 return reason; | |
| 174 } | |
| 175 | |
| 176 String _match(expected, actual) { | |
| 177 Description reason = _recursiveMatch(expected, actual, '', 0); | |
| 178 return reason == null ? null : reason.toString(); | |
| 179 } | |
| 180 | |
| 181 // TODO(gram) - see if we can make use of matchState here to avoid | |
| 182 // recursing again in describeMismatch. | |
| 183 bool matches(item, MatchState matchState) => _match(_expected, item) == null; | |
| 184 | |
| 185 Description describe(Description description) => | |
| 186 description.addDescriptionOf(_expected); | |
| 187 | |
| 188 Description describeMismatch(item, Description mismatchDescription, | |
| 189 MatchState matchState, bool verbose) => | |
| 190 mismatchDescription.add(_match(_expected, item)); | |
| 191 } | |
| 192 | |
| 193 /** A matcher that matches any value. */ | |
| 194 const Matcher anything = const _IsAnything(); | |
| 195 | |
| 196 class _IsAnything extends BaseMatcher { | |
| 197 const _IsAnything(); | |
| 198 bool matches(item, MatchState matchState) => true; | |
| 199 Description describe(Description description) => | |
| 200 description.add('anything'); | |
| 201 } | |
| 202 | |
| 203 /** | |
| 204 * Returns a matcher that matches if an object is an instance | |
| 205 * of [type] (or a subtype). | |
| 206 * | |
| 207 * As types are not first class objects in Dart we can only | |
| 208 * approximate this test by using a generic wrapper class. | |
| 209 * | |
| 210 * For example, to test whether 'bar' is an instance of type | |
| 211 * 'Foo', we would write: | |
| 212 * | |
| 213 * expect(bar, new isInstanceOf<Foo>()); | |
| 214 * | |
| 215 * To get better error message, supply a name when creating the | |
| 216 * Type wrapper; e.g.: | |
| 217 * | |
| 218 * expect(bar, new isInstanceOf<Foo>('Foo')); | |
| 219 * | |
| 220 * Note that this does not currently work in dart2js; it will | |
| 221 * match any type, and isNot(new isInstanceof<T>()) will always | |
| 222 * fail. This is because dart2js currently ignores template type | |
| 223 * parameters. | |
| 224 */ | |
| 225 class isInstanceOf<T> extends BaseMatcher { | |
| 226 final String _name; | |
| 227 const isInstanceOf([name = 'specified type']) : this._name = name; | |
| 228 bool matches(obj, MatchState matchState) => obj is T; | |
| 229 // The description here is lame :-( | |
| 230 Description describe(Description description) => | |
| 231 description.add('an instance of ${_name}'); | |
| 232 } | |
| 233 | |
| 234 /** | |
| 235 * This can be used to match two kinds of objects: | |
| 236 * | |
| 237 * * A [Function] that throws an exception when called. The function cannot | |
| 238 * take any arguments. If you want to test that a function expecting | |
| 239 * arguments throws, wrap it in another zero-argument function that calls | |
| 240 * the one you want to test. | |
| 241 * | |
| 242 * * A [Future] that completes with an exception. Note that this creates an | |
| 243 * asynchronous expectation. The call to `expect()` that includes this will | |
| 244 * return immediately and execution will continue. Later, when the future | |
| 245 * completes, the actual expectation will run. | |
| 246 */ | |
| 247 const Matcher throws = const Throws(); | |
| 248 | |
| 249 /** | |
| 250 * This can be used to match two kinds of objects: | |
| 251 * | |
| 252 * * A [Function] that throws an exception when called. The function cannot | |
| 253 * take any arguments. If you want to test that a function expecting | |
| 254 * arguments throws, wrap it in another zero-argument function that calls | |
| 255 * the one you want to test. | |
| 256 * | |
| 257 * * A [Future] that completes with an exception. Note that this creates an | |
| 258 * asynchronous expectation. The call to `expect()` that includes this will | |
| 259 * return immediately and execution will continue. Later, when the future | |
| 260 * completes, the actual expectation will run. | |
| 261 * | |
| 262 * In both cases, when an exception is thrown, this will test that the exception | |
| 263 * object matches [matcher]. If [matcher] is not an instance of [Matcher], it | |
| 264 * will implicitly be treated as `equals(matcher)`. | |
| 265 */ | |
| 266 Matcher throwsA(matcher) => new Throws(wrapMatcher(matcher)); | |
| 267 | |
| 268 /** | |
| 269 * A matcher that matches a function call against no exception. | |
| 270 * The function will be called once. Any exceptions will be silently swallowed. | |
| 271 * The value passed to expect() should be a reference to the function. | |
| 272 * Note that the function cannot take arguments; to handle this | |
| 273 * a wrapper will have to be created. | |
| 274 */ | |
| 275 const Matcher returnsNormally = const _ReturnsNormally(); | |
| 276 | |
| 277 class Throws extends BaseMatcher { | |
| 278 final Matcher _matcher; | |
| 279 | |
| 280 const Throws([Matcher matcher]) : | |
| 281 this._matcher = matcher; | |
| 282 | |
| 283 bool matches(item, MatchState matchState) { | |
| 284 if (item is Future) { | |
| 285 // Queue up an asynchronous expectation that validates when the future | |
| 286 // completes. | |
| 287 item.onComplete(expectAsync1((future) { | |
| 288 if (future.hasValue) { | |
| 289 expect(false, isTrue, reason: | |
| 290 "Expected future to fail, but succeeded with '${future.value}'."); | |
| 291 } else if (_matcher != null) { | |
| 292 var reason; | |
| 293 if (future.stackTrace != null) { | |
| 294 var stackTrace = future.stackTrace.toString(); | |
| 295 stackTrace = " ${stackTrace.replaceAll("\n", "\n ")}"; | |
| 296 reason = "Actual exception trace:\n$stackTrace"; | |
| 297 } | |
| 298 expect(future.exception, _matcher, reason: reason); | |
| 299 } | |
| 300 })); | |
| 301 | |
| 302 // It hasn't failed yet. | |
| 303 return true; | |
| 304 } | |
| 305 | |
| 306 try { | |
| 307 item(); | |
| 308 return false; | |
| 309 } catch (e, s) { | |
| 310 if (_matcher == null ||_matcher.matches(e, matchState)) { | |
| 311 return true; | |
| 312 } else { | |
| 313 matchState.state = { | |
| 314 'exception' :e, | |
| 315 'stack': s | |
| 316 }; | |
| 317 return false; | |
| 318 } | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 Description describe(Description description) { | |
| 323 if (_matcher == null) { | |
| 324 return description.add("throws an exception"); | |
| 325 } else { | |
| 326 return description.add('throws an exception which matches '). | |
| 327 addDescriptionOf(_matcher); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 Description describeMismatch(item, Description mismatchDescription, | |
| 332 MatchState matchState, | |
| 333 bool verbose) { | |
| 334 if (_matcher == null || matchState.state == null) { | |
| 335 return mismatchDescription.add(' no exception'); | |
| 336 } else { | |
| 337 mismatchDescription. | |
| 338 add(' exception ').addDescriptionOf(matchState.state['exception']); | |
| 339 if (verbose) { | |
| 340 mismatchDescription.add(' at '). | |
| 341 add(matchState.state['stack'].toString()); | |
| 342 } | |
| 343 mismatchDescription.add(' does not match ').addDescriptionOf(_matcher); | |
| 344 return mismatchDescription; | |
| 345 } | |
| 346 } | |
| 347 } | |
| 348 | |
| 349 class _ReturnsNormally extends BaseMatcher { | |
| 350 const _ReturnsNormally(); | |
| 351 | |
| 352 bool matches(f, MatchState matchState) { | |
| 353 try { | |
| 354 f(); | |
| 355 return true; | |
| 356 } catch (e, s) { | |
| 357 matchState.state = { | |
| 358 'exception' : e, | |
| 359 'stack': s | |
| 360 }; | |
| 361 return false; | |
| 362 } | |
| 363 } | |
| 364 | |
| 365 Description describe(Description description) => | |
| 366 description.add("return normally"); | |
| 367 | |
| 368 Description describeMismatch(item, Description mismatchDescription, | |
| 369 MatchState matchState, | |
| 370 bool verbose) { | |
| 371 mismatchDescription.add(' threw '). | |
| 372 addDescriptionOf(matchState.state['exception']); | |
| 373 if (verbose) { | |
| 374 mismatchDescription.add(' at '). | |
| 375 add(matchState.state['stack'].toString()); | |
| 376 } | |
| 377 return mismatchDescription; | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 /* | |
| 382 * Matchers for different exception types. Ideally we should just be able to | |
| 383 * use something like: | |
| 384 * | |
| 385 * final Matcher throwsException = | |
| 386 * const _Throws(const isInstanceOf<Exception>()); | |
| 387 * | |
| 388 * Unfortunately instanceOf is not working with dart2js. | |
| 389 * | |
| 390 * Alternatively, if static functions could be used in const expressions, | |
| 391 * we could use: | |
| 392 * | |
| 393 * bool _isException(x) => x is Exception; | |
| 394 * final Matcher isException = const _Predicate(_isException, "Exception"); | |
| 395 * final Matcher throwsException = const _Throws(isException); | |
| 396 * | |
| 397 * But currently using static functions in const expressions is not supported. | |
| 398 * For now the only solution for all platforms seems to be separate classes | |
| 399 * for each exception type. | |
| 400 */ | |
| 401 | |
| 402 abstract class TypeMatcher extends BaseMatcher { | |
| 403 final String _name; | |
| 404 const TypeMatcher(this._name); | |
| 405 Description describe(Description description) => | |
| 406 description.add(_name); | |
| 407 } | |
| 408 | |
| 409 /** A matcher for FormatExceptions. */ | |
| 410 const isFormatException = const _FormatException(); | |
| 411 | |
| 412 /** A matcher for functions that throw FormatException. */ | |
| 413 const Matcher throwsFormatException = | |
| 414 const Throws(isFormatException); | |
| 415 | |
| 416 class _FormatException extends TypeMatcher { | |
| 417 const _FormatException() : super("FormatException"); | |
| 418 bool matches(item, MatchState matchState) => item is FormatException; | |
| 419 } | |
| 420 | |
| 421 /** A matcher for Exceptions. */ | |
| 422 const isException = const _Exception(); | |
| 423 | |
| 424 /** A matcher for functions that throw Exception. */ | |
| 425 const Matcher throwsException = const Throws(isException); | |
| 426 | |
| 427 class _Exception extends TypeMatcher { | |
| 428 const _Exception() : super("Exception"); | |
| 429 bool matches(item, MatchState matchState) => item is Exception; | |
| 430 } | |
| 431 | |
| 432 /** A matcher for ArgumentErrors. */ | |
| 433 const isArgumentError = const _ArgumentError(); | |
| 434 | |
| 435 /** A matcher for functions that throw ArgumentError. */ | |
| 436 const Matcher throwsArgumentError = | |
| 437 const Throws(isArgumentError); | |
| 438 | |
| 439 class _ArgumentError extends TypeMatcher { | |
| 440 const _ArgumentError() : super("ArgumentError"); | |
| 441 bool matches(item, MatchState matchState) => item is ArgumentError; | |
| 442 } | |
| 443 | |
| 444 /** A matcher for IllegalJSRegExpExceptions. */ | |
| 445 const isIllegalJSRegExpException = const _IllegalJSRegExpException(); | |
| 446 | |
| 447 /** A matcher for functions that throw IllegalJSRegExpException. */ | |
| 448 const Matcher throwsIllegalJSRegExpException = | |
| 449 const Throws(isIllegalJSRegExpException); | |
| 450 | |
| 451 class _IllegalJSRegExpException extends TypeMatcher { | |
| 452 const _IllegalJSRegExpException() : super("IllegalJSRegExpException"); | |
| 453 bool matches(item, MatchState matchState) => item is IllegalJSRegExpException; | |
| 454 } | |
| 455 | |
| 456 /** A matcher for IndexOutOfRangeExceptions. */ | |
| 457 const isIndexOutOfRangeException = const _IndexOutOfRangeException(); | |
| 458 | |
| 459 /** A matcher for functions that throw IndexOutOfRangeException. */ | |
| 460 const Matcher throwsIndexOutOfRangeException = | |
| 461 const Throws(isIndexOutOfRangeException); | |
| 462 | |
| 463 class _IndexOutOfRangeException extends TypeMatcher { | |
| 464 const _IndexOutOfRangeException() : super("IndexOutOfRangeException"); | |
| 465 bool matches(item, MatchState matchState) => item is IndexOutOfRangeException; | |
| 466 } | |
| 467 | |
| 468 /** A matcher for NoSuchMethodErrors. */ | |
| 469 const isNoSuchMethodError = const _NoSuchMethodError(); | |
| 470 | |
| 471 /** A matcher for functions that throw NoSuchMethodError. */ | |
| 472 const Matcher throwsNoSuchMethodError = | |
| 473 const Throws(isNoSuchMethodError); | |
| 474 | |
| 475 class _NoSuchMethodError extends TypeMatcher { | |
| 476 const _NoSuchMethodError() : super("NoSuchMethodError"); | |
| 477 bool matches(item, MatchState matchState) => item is NoSuchMethodError; | |
| 478 } | |
| 479 | |
| 480 /** A matcher for NotImplementedExceptions. */ | |
| 481 const isNotImplementedException = const _NotImplementedException(); | |
| 482 | |
| 483 /** A matcher for functions that throw Exception. */ | |
| 484 const Matcher throwsNotImplementedException = | |
| 485 const Throws(isNotImplementedException); | |
| 486 | |
| 487 class _NotImplementedException extends TypeMatcher { | |
| 488 const _NotImplementedException() : super("NotImplementedException"); | |
| 489 bool matches(item, MatchState matchState) => item is NotImplementedException; | |
| 490 } | |
| 491 | |
| 492 /** A matcher for NullPointerExceptions. */ | |
| 493 const isNullPointerException = const _NullPointerException(); | |
| 494 | |
| 495 /** A matcher for functions that throw NotNullPointerException. */ | |
| 496 const Matcher throwsNullPointerException = | |
| 497 const Throws(isNullPointerException); | |
| 498 | |
| 499 class _NullPointerException extends TypeMatcher { | |
| 500 const _NullPointerException() : super("NullPointerException"); | |
| 501 bool matches(item, MatchState matchState) => item is NullPointerException; | |
| 502 } | |
| 503 | |
| 504 /** A matcher for UnsupportedError. */ | |
| 505 const isUnsupportedError = const _UnsupportedError(); | |
| 506 | |
| 507 /** A matcher for functions that throw UnsupportedError. */ | |
| 508 const Matcher throwsUnsupportedError = const Throws(isUnsupportedError); | |
| 509 | |
| 510 class _UnsupportedError extends TypeMatcher { | |
| 511 const _UnsupportedError() : | |
| 512 super("UnsupportedError"); | |
| 513 bool matches(item, MatchState matchState) => item is UnsupportedError; | |
| 514 } | |
| 515 | |
| 516 /** A matcher for Map types. */ | |
| 517 const isMap = const _IsMap(); | |
| 518 | |
| 519 class _IsMap extends TypeMatcher { | |
| 520 const _IsMap() : super("Map"); | |
| 521 bool matches(item, MatchState matchState) => item is Map; | |
| 522 } | |
| 523 | |
| 524 /** A matcher for List types. */ | |
| 525 const isList = const _IsList(); | |
| 526 | |
| 527 class _IsList extends TypeMatcher { | |
| 528 const _IsList() : super("List"); | |
| 529 bool matches(item, MatchState matchState) => item is List; | |
| 530 } | |
| 531 | |
| 532 /** | |
| 533 * Returns a matcher that matches if an object has a length property | |
| 534 * that matches [matcher]. | |
| 535 */ | |
| 536 Matcher hasLength(matcher) => | |
| 537 new _HasLength(wrapMatcher(matcher)); | |
| 538 | |
| 539 class _HasLength extends BaseMatcher { | |
| 540 final Matcher _matcher; | |
| 541 const _HasLength([Matcher matcher = null]) : this._matcher = matcher; | |
| 542 | |
| 543 bool matches(item, MatchState matchState) { | |
| 544 return _matcher.matches(item.length, matchState); | |
| 545 } | |
| 546 | |
| 547 Description describe(Description description) => | |
| 548 description.add('an object with length of '). | |
| 549 addDescriptionOf(_matcher); | |
| 550 | |
| 551 Description describeMismatch(item, Description mismatchDescription, | |
| 552 MatchState matchState, bool verbose) { | |
| 553 super.describeMismatch(item, mismatchDescription, matchState, verbose); | |
| 554 try { | |
| 555 // We want to generate a different description if there is no length | |
| 556 // property. This is harmless code that will throw if no length property | |
| 557 // but subtle enough that an optimizer shouldn't strip it out. | |
| 558 if (item.length * item.length >= 0) { | |
| 559 return mismatchDescription.add(' with length of '). | |
| 560 addDescriptionOf(item.length); | |
| 561 } | |
| 562 } catch (e) { | |
| 563 return mismatchDescription.add(' has no length property'); | |
| 564 } | |
| 565 } | |
| 566 } | |
| 567 | |
| 568 /** | |
| 569 * Returns a matcher that matches if the match argument contains | |
| 570 * the expected value. For [String]s this means substring matching; | |
| 571 * for [Map]s is means the map has the key, and for [Collection]s it | |
| 572 * means the collection has a matching element. In the case of collections, | |
| 573 * [expected] can itself be a matcher. | |
| 574 */ | |
| 575 Matcher contains(expected) => new _Contains(expected); | |
| 576 | |
| 577 class _Contains extends BaseMatcher { | |
| 578 | |
| 579 final _expected; | |
| 580 | |
| 581 const _Contains(this._expected); | |
| 582 | |
| 583 bool matches(item, MatchState matchState) { | |
| 584 if (item is String) { | |
| 585 return item.indexOf(_expected) >= 0; | |
| 586 } else if (item is Collection) { | |
| 587 if (_expected is Matcher) { | |
| 588 return item.some((e) => _expected.matches(e, matchState)); | |
| 589 } else { | |
| 590 return item.some((e) => e == _expected); | |
| 591 } | |
| 592 } else if (item is Map) { | |
| 593 return item.containsKey(_expected); | |
| 594 } | |
| 595 return false; | |
| 596 } | |
| 597 | |
| 598 Description describe(Description description) => | |
| 599 description.add('contains ').addDescriptionOf(_expected); | |
| 600 } | |
| 601 | |
| 602 /** | |
| 603 * Returns a matcher that matches if the match argument is in | |
| 604 * the expected value. This is the converse of [contains]. | |
| 605 */ | |
| 606 Matcher isIn(expected) => new _In(expected); | |
| 607 | |
| 608 class _In extends BaseMatcher { | |
| 609 | |
| 610 final _expected; | |
| 611 | |
| 612 const _In(this._expected); | |
| 613 | |
| 614 bool matches(item, MatchState matchState) { | |
| 615 if (_expected is String) { | |
| 616 return _expected.indexOf(item) >= 0; | |
| 617 } else if (_expected is Collection) { | |
| 618 return _expected.some((e) => e == item); | |
| 619 } else if (_expected is Map) { | |
| 620 return _expected.containsKey(item); | |
| 621 } | |
| 622 return false; | |
| 623 } | |
| 624 | |
| 625 Description describe(Description description) => | |
| 626 description.add('is in ').addDescriptionOf(_expected); | |
| 627 } | |
| 628 | |
| 629 /** | |
| 630 * Returns a matcher that uses an arbitrary function that returns | |
| 631 * true or false for the actual value. | |
| 632 */ | |
| 633 Matcher predicate(f, [description ='satisfies function']) => | |
| 634 new _Predicate(f, description); | |
| 635 | |
| 636 class _Predicate extends BaseMatcher { | |
| 637 | |
| 638 final _matcher; | |
| 639 final String _description; | |
| 640 | |
| 641 const _Predicate(this._matcher, this._description); | |
| 642 | |
| 643 bool matches(item, MatchState matchState) => _matcher(item); | |
| 644 | |
| 645 Description describe(Description description) => | |
| 646 description.add(_description); | |
| 647 } | |
| 648 | |
| 649 /** | |
| 650 * A useful utility class for implementing other matchers through inheritance. | |
| 651 * Derived classes should call the base constructor with a feature name and | |
| 652 * description, and an instance matcher, and should implement the | |
| 653 * [featureValueOf] abstract method. | |
| 654 * | |
| 655 * The feature description will typically describe the item and the feature, | |
| 656 * while the feature name will just name the feature. For example, we may | |
| 657 * have a Widget class where each Widget has a price; we could make a | |
| 658 * FeatureMatcher that can make assertions about prices with: | |
| 659 * | |
| 660 * class HasPrice extends FeatureMatcher { | |
| 661 * const HasPrice(matcher) : | |
| 662 * super("Widget with price that is", "price", matcher); | |
| 663 * featureValueOf(actual) => actual.price; | |
| 664 * } | |
| 665 * | |
| 666 * and then use this for example like: | |
| 667 * | |
| 668 * expect(inventoryItem, new HasPrice(greaterThan(0))); | |
| 669 */ | |
| 670 class CustomMatcher extends BaseMatcher { | |
| 671 final String _featureDescription; | |
| 672 final String _featureName; | |
| 673 final Matcher _matcher; | |
| 674 | |
| 675 const CustomMatcher(this._featureDescription, this._featureName, | |
| 676 this._matcher); | |
| 677 | |
| 678 /** Override this to extract the interesting feature.*/ | |
| 679 featureValueOf(actual) => actual; | |
| 680 | |
| 681 bool matches(item, MatchState matchState) { | |
| 682 var f = featureValueOf(item); | |
| 683 if (_matcher.matches(f, matchState)) return true; | |
| 684 matchState.state = { 'innerState': matchState.state, 'feature': f }; | |
| 685 return false; | |
| 686 } | |
| 687 | |
| 688 Description describe(Description description) => | |
| 689 description.add(_featureDescription).add(' ').addDescriptionOf(_matcher); | |
| 690 | |
| 691 Description describeMismatch(item, Description mismatchDescription, | |
| 692 MatchState matchState, bool verbose) { | |
| 693 mismatchDescription.add(_featureName).add(' '); | |
| 694 _matcher.describeMismatch(matchState.state['feature'], mismatchDescription, | |
| 695 matchState.state['innerState'], verbose); | |
| 696 return mismatchDescription; | |
| 697 } | |
| 698 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 11301046:
Restructure pkg/unittest and pkg/webdriver to follow the pub conventions. (Closed)
Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/