chrome/browser/test_presubmit.py

   1 #!/usr/bin/env python
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """Unit tests for Web Development Style Guide checker."""
   7
   8 import os
   9 import re
  10 import sys
  11 import unittest
  12
  13 test_dir = os.path.dirname(os.path.abspath(__file__))
  14 sys.path.extend([
  15     os.path.normpath(os.path.join(test_dir, '..', '..', 'tools')),
  16     os.path.join(test_dir),
  17 ])
  18
  19 import find_depot_tools # pylint: disable=W0611
  20 from testing_support.super_mox import SuperMoxTestBase
  21 from web_dev_style import css_checker, js_checker # pylint: disable=F0401
  22
  23
  24 class JsStyleGuideTest(SuperMoxTestBase):
  25   def setUp(self):
  26     SuperMoxTestBase.setUp(self)
  27
  28     input_api = self.mox.CreateMockAnything()
  29     input_api.re = re
  30     output_api = self.mox.CreateMockAnything()
  31     self.checker = js_checker.JSChecker(input_api, output_api)
  32
  33   def GetHighlight(self, line, error):
  34     """Returns the substring of |line| that is highlighted in |error|."""
  35     error_lines = error.split('\n')
  36     highlight = error_lines[error_lines.index(line) + 1]
  37     return ''.join(ch1 for (ch1, ch2) in zip(line, highlight) if ch2 == '^')
  38
  39   def ShouldFailConstCheck(self, line):
  40     """Checks that the 'const' checker flags |line| as a style error."""
  41     error = self.checker.ConstCheck(1, line)
  42     self.assertNotEqual('', error,
  43         'Should be flagged as style error: ' + line)
  44     self.assertEqual(self.GetHighlight(line, error), 'const')
  45
  46   def ShouldPassConstCheck(self, line):
  47     """Checks that the 'const' checker doesn't flag |line| as a style error."""
  48     self.assertEqual('', self.checker.ConstCheck(1, line),
  49         'Should not be flagged as style error: ' + line)
  50
  51   def testConstFails(self):
  52     lines = [
  53         "const foo = 'bar';",
  54         "    const bar = 'foo';",
  55
  56         # Trying to use |const| as a variable name
  57         "var const = 0;",
  58
  59         "var x = 5; const y = 6;",
  60         "for (var i=0, const e=10; i<e; i++) {",
  61         "for (const x=0; x<foo; i++) {",
  62         "while (const x = 7) {",
  63     ]
  64     for line in lines:
  65       self.ShouldFailConstCheck(line)
  66
  67   def testConstPasses(self):
  68     lines = [
  69         # sanity check
  70         "var foo = 'bar'",
  71
  72         # @const JsDoc tag
  73         "/** @const */ var SEVEN = 7;",
  74
  75         # @const tag in multi-line comment
  76         " * @const",
  77         "   * @const",
  78
  79         # @constructor tag in multi-line comment
  80         " * @constructor",
  81         "   * @constructor",
  82
  83         # words containing 'const'
  84         "if (foo.constructor) {",
  85         "var deconstruction = 'something';",
  86         "var madeUpWordconst = 10;",
  87
  88         # Strings containing the word |const|
  89         "var str = 'const at the beginning';",
  90         "var str = 'At the end: const';",
  91
  92         # doing this one with regex is probably not practical
  93         #"var str = 'a const in the middle';",
  94     ]
  95     for line in lines:
  96       self.ShouldPassConstCheck(line)
  97
  98   def ShouldFailChromeSendCheck(self, line):
  99     """Checks that the 'chrome.send' checker flags |line| as a style error."""
 100     error = self.checker.ChromeSendCheck(1, line)
 101     self.assertNotEqual('', error,
 102         'Should be flagged as style error: ' + line)
 103     self.assertEqual(self.GetHighlight(line, error), ', []')
 104
 105   def ShouldPassChromeSendCheck(self, line):
 106     """Checks that the 'chrome.send' checker doesn't flag |line| as a style
 107        error.
 108     """
 109     self.assertEqual('', self.checker.ChromeSendCheck(1, line),
 110         'Should not be flagged as style error: ' + line)
 111
 112   def testChromeSendFails(self):
 113     lines = [
 114         "chrome.send('message', []);",
 115         "  chrome.send('message', []);",
 116     ]
 117     for line in lines:
 118       self.ShouldFailChromeSendCheck(line)
 119
 120   def testChromeSendPasses(self):
 121     lines = [
 122         "chrome.send('message', constructArgs('foo', []));",
 123         "  chrome.send('message', constructArgs('foo', []));",
 124         "chrome.send('message', constructArgs([]));",
 125         "  chrome.send('message', constructArgs([]));",
 126     ]
 127     for line in lines:
 128       self.ShouldPassChromeSendCheck(line)
 129
 130   def ShouldFailEndJsDocCommentCheck(self, line):
 131     """Checks that the **/ checker flags |line| as a style error."""
 132     error = self.checker.EndJsDocCommentCheck(1, line)
 133     self.assertNotEqual('', error,
 134         'Should be flagged as style error: ' + line)
 135     self.assertEqual(self.GetHighlight(line, error), '**/')
 136
 137   def ShouldPassEndJsDocCommentCheck(self, line):
 138     """Checks that the **/ checker doesn't flag |line| as a style error."""
 139     self.assertEqual('', self.checker.EndJsDocCommentCheck(1, line),
 140         'Should not be flagged as style error: ' + line)
 141
 142   def testEndJsDocCommentFails(self):
 143     lines = [
 144         "/** @override **/",
 145         "/** @type {number} @const **/",
 146         "  **/",
 147         "**/  ",
 148     ]
 149     for line in lines:
 150       self.ShouldFailEndJsDocCommentCheck(line)
 151
 152   def testEndJsDocCommentPasses(self):
 153     lines = [
 154         "/***************/",  # visual separators
 155         "  */",  # valid JSDoc comment ends
 156         "*/  ",
 157         "/**/",  # funky multi-line comment enders
 158         "/** @override */",  # legit JSDoc one-liners
 159     ]
 160     for line in lines:
 161       self.ShouldPassEndJsDocCommentCheck(line)
 162
 163   def ShouldFailGetElementByIdCheck(self, line):
 164     """Checks that the 'getElementById' checker flags |line| as a style
 165        error.
 166     """
 167     error = self.checker.GetElementByIdCheck(1, line)
 168     self.assertNotEqual('', error,
 169         'Should be flagged as style error: ' + line)
 170     self.assertEqual(self.GetHighlight(line, error), 'document.getElementById')
 171
 172   def ShouldPassGetElementByIdCheck(self, line):
 173     """Checks that the 'getElementById' checker doesn't flag |line| as a style
 174        error.
 175     """
 176     self.assertEqual('', self.checker.GetElementByIdCheck(1, line),
 177         'Should not be flagged as style error: ' + line)
 178
 179   def testGetElementByIdFails(self):
 180     lines = [
 181         "document.getElementById('foo');",
 182         "  document.getElementById('foo');",
 183         "var x = document.getElementById('foo');",
 184         "if (document.getElementById('foo').hidden) {",
 185     ]
 186     for line in lines:
 187       self.ShouldFailGetElementByIdCheck(line)
 188
 189   def testGetElementByIdPasses(self):
 190     lines = [
 191         "elem.ownerDocument.getElementById('foo');",
 192         "  elem.ownerDocument.getElementById('foo');",
 193         "var x = elem.ownerDocument.getElementById('foo');",
 194         "if (elem.ownerDocument.getElementById('foo').hidden) {",
 195         "doc.getElementById('foo');",
 196         "  doc.getElementById('foo');",
 197         "cr.doc.getElementById('foo');",
 198         "  cr.doc.getElementById('foo');",
 199         "var x = doc.getElementById('foo');",
 200         "if (doc.getElementById('foo').hidden) {",
 201     ]
 202     for line in lines:
 203       self.ShouldPassGetElementByIdCheck(line)
 204
 205   def ShouldFailInheritDocCheck(self, line):
 206     """Checks that the '@inheritDoc' checker flags |line| as a style error."""
 207     error = self.checker.InheritDocCheck(1, line)
 208     self.assertNotEqual('', error,
 209         msg='Should be flagged as style error: ' + line)
 210     self.assertEqual(self.GetHighlight(line, error), '@inheritDoc')
 211
 212   def ShouldPassInheritDocCheck(self, line):
 213     """Checks that the '@inheritDoc' checker doesn't flag |line| as a style
 214        error.
 215     """
 216     self.assertEqual('', self.checker.InheritDocCheck(1, line),
 217         msg='Should not be flagged as style error: ' + line)
 218
 219   def testInheritDocFails(self):
 220     lines = [
 221         " /** @inheritDoc */",
 222         "   * @inheritDoc",
 223     ]
 224     for line in lines:
 225       self.ShouldFailInheritDocCheck(line)
 226
 227   def testInheritDocPasses(self):
 228     lines = [
 229         "And then I said, but I won't @inheritDoc! Hahaha!",
 230         " If your dad's a doctor, do you inheritDoc?",
 231         "  What's up, inherit doc?",
 232         "   this.inheritDoc(someDoc)",
 233     ]
 234     for line in lines:
 235       self.ShouldPassInheritDocCheck(line)
 236
 237   def ShouldFailWrapperTypeCheck(self, line):
 238     """Checks that the use of wrapper types (i.e. new Number(), @type {Number})
 239        is a style error.
 240     """
 241     error = self.checker.WrapperTypeCheck(1, line)
 242     self.assertNotEqual('', error,
 243         msg='Should be flagged as style error: ' + line)
 244     highlight = self.GetHighlight(line, error)
 245     self.assertTrue(highlight in ('Boolean', 'Number', 'String'))
 246
 247   def ShouldPassWrapperTypeCheck(self, line):
 248     """Checks that the wrapper type checker doesn't flag |line| as a style
 249        error.
 250     """
 251     self.assertEqual('', self.checker.WrapperTypeCheck(1, line),
 252         msg='Should not be flagged as style error: ' + line)
 253
 254   def testWrapperTypePasses(self):
 255     lines = [
 256         "/** @param {!ComplexType} */",
 257         "  * @type {Object}",
 258         "   * @param {Function=} opt_callback",
 259         "    * @param {} num Number of things to add to {blah}.",
 260         "   *  @return {!print_preview.PageNumberSet}",
 261         " /* @returns {Number} */",  # Should be /** @return {Number} */
 262         "* @param {!LocalStrings}"
 263         " Your type of Boolean is false!",
 264         "  Then I parameterized her Number from her friend!",
 265         "   A String of Pearls",
 266         "    types.params.aBoolean.typeString(someNumber)",
 267     ]
 268     for line in lines:
 269       self.ShouldPassWrapperTypeCheck(line)
 270
 271   def testWrapperTypeFails(self):
 272     lines = [
 273         "  /**@type {String}*/(string)",
 274         "   * @param{Number=} opt_blah A number",
 275         "/** @private @return {!Boolean} */",
 276         " * @param {number|String}",
 277     ]
 278     for line in lines:
 279       self.ShouldFailWrapperTypeCheck(line)
 280
 281   def ShouldFailVarNameCheck(self, line):
 282     """Checks that var unix_hacker, $dollar are style errors."""
 283     error = self.checker.VarNameCheck(1, line)
 284     self.assertNotEqual('', error,
 285         msg='Should be flagged as style error: ' + line)
 286     highlight = self.GetHighlight(line, error)
 287     self.assertFalse('var ' in highlight);
 288
 289   def ShouldPassVarNameCheck(self, line):
 290     """Checks that variableNamesLikeThis aren't style errors."""
 291     self.assertEqual('', self.checker.VarNameCheck(1, line),
 292         msg='Should not be flagged as style error: ' + line)
 293
 294   def testVarNameFails(self):
 295     lines = [
 296         "var private_;",
 297         " var _super_private",
 298         "  var unix_hacker = someFunc();",
 299     ]
 300     for line in lines:
 301       self.ShouldFailVarNameCheck(line)
 302
 303   def testVarNamePasses(self):
 304     lines = [
 305         "  var namesLikeThis = [];",
 306         " for (var i = 0; i < 10; ++i) { ",
 307         "for (var i in obj) {",
 308         " var one, two, three;",
 309         "  var magnumPI = {};",
 310         " var g_browser = 'da browzer';",
 311         "/** @const */ var Bla = options.Bla;",  # goog.scope() replacement.
 312         " var $ = function() {",                 # For legacy reasons.
 313         "  var StudlyCaps = cr.define('bla')",   # Classes.
 314         " var SCARE_SMALL_CHILDREN = [",         # TODO(dbeam): add @const in
 315                                                  # front of all these vars like
 316         "/** @const */ CONST_VAR = 1;",          # this line has (<--).
 317     ]
 318     for line in lines:
 319       self.ShouldPassVarNameCheck(line)
 320
 321
 322 class CssStyleGuideTest(SuperMoxTestBase):
 323   def setUp(self):
 324     SuperMoxTestBase.setUp(self)
 325
 326     self.fake_file_name = 'fake.css'
 327
 328     self.fake_file = self.mox.CreateMockAnything()
 329     self.mox.StubOutWithMock(self.fake_file, 'LocalPath')
 330     self.fake_file.LocalPath().AndReturn(self.fake_file_name)
 331     # Actual calls to NewContents() are defined in each test.
 332     self.mox.StubOutWithMock(self.fake_file, 'NewContents')
 333
 334     self.input_api = self.mox.CreateMockAnything()
 335     self.input_api.re = re
 336     self.mox.StubOutWithMock(self.input_api, 'AffectedSourceFiles')
 337     self.input_api.AffectedFiles(
 338         include_deletes=False, file_filter=None).AndReturn([self.fake_file])
 339
 340     # Actual creations of PresubmitPromptWarning are defined in each test.
 341     self.output_api = self.mox.CreateMockAnything()
 342     self.mox.StubOutWithMock(self.output_api, 'PresubmitPromptWarning',
 343                              use_mock_anything=True)
 344
 345     author_msg = ('Was the CSS checker useful? '
 346                   'Send feedback or hate mail to dbeam@chromium.org.')
 347     self.output_api = self.mox.CreateMockAnything()
 348     self.mox.StubOutWithMock(self.output_api, 'PresubmitNotifyResult',
 349                              use_mock_anything=True)
 350     self.output_api.PresubmitNotifyResult(author_msg).AndReturn(None)
 351
 352   def VerifyContentsProducesOutput(self, contents, output):
 353     self.fake_file.NewContents().AndReturn(contents.splitlines())
 354     self.output_api.PresubmitPromptWarning(
 355         self.fake_file_name + ':\n' + output.strip()).AndReturn(None)
 356     self.mox.ReplayAll()
 357     css_checker.CSSChecker(self.input_api, self.output_api).RunChecks()
 358
 359   def testCssAlphaWithAtBlock(self):
 360     self.VerifyContentsProducesOutput("""
 361 <include src="../shared/css/cr/ui/overlay.css">
 362 <include src="chrome://resources/totally-cool.css" />
 363
 364 /* A hopefully safely ignored comment and @media statement. /**/
 365 @media print {
 366   div {
 367     display: block;
 368     color: red;
 369   }
 370 }
 371
 372 .rule {
 373   z-index: 5;
 374 <if expr="not is macosx">
 375   background-image: url(chrome://resources/BLAH); /* TODO(dbeam): Fix this. */
 376   background-color: rgb(235, 239, 249);
 377 </if>
 378 <if expr="is_macosx">
 379   background-color: white;
 380   background-image: url(chrome://resources/BLAH2);
 381 </if>
 382   color: black;
 383 }
 384
 385 <if expr="is_macosx">
 386 .language-options-right {
 387   visibility: hidden;
 388   opacity: 1; /* TODO(dbeam): Fix this. */
 389 }
 390 </if>""", """
 391 - Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
 392     display: block;
 393     color: red;
 394
 395     z-index: 5;
 396     color: black;""")
 397
 398   def testCssAlphaWithNonStandard(self):
 399     self.VerifyContentsProducesOutput("""
 400 div {
 401   /* A hopefully safely ignored comment and @media statement. /**/
 402   color: red;
 403   -webkit-margin-start: 5px;
 404 }""", """
 405 - Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
 406     color: red;
 407     -webkit-margin-start: 5px;""")
 408
 409   def testCssAlphaWithLongerDashedProps(self):
 410     self.VerifyContentsProducesOutput("""
 411 div {
 412   border-left: 5px;  /* A hopefully removed comment. */
 413   border: 5px solid red;
 414 }""", """
 415 - Alphabetize properties and list vendor specific (i.e. -webkit) above standard.
 416     border-left: 5px;
 417     border: 5px solid red;""")
 418
 419   def testCssBracesHaveSpaceBeforeAndNothingAfter(self):
 420     self.VerifyContentsProducesOutput("""
 421 /* Hello! */div/* Comment here*/{
 422   display: block;
 423 }
 424
 425 blah /* hey! */
 426 {
 427   rule: value;
 428 }
 429
 430 .this.is { /* allowed */
 431   rule: value;
 432 }""", """
 433 - Start braces ({) end a selector, have a space before them and no rules after.
 434     div{
 435     {""")
 436
 437   def testCssClassesUseDashes(self):
 438     self.VerifyContentsProducesOutput("""
 439 .className,
 440 .ClassName,
 441 .class-name /* We should not catch this. */,
 442 .class_name {
 443   display: block;
 444 }""", """
 445  - Classes use .dash-form.
 446     .className,
 447     .ClassName,
 448     .class_name {""")
 449
 450   def testCssCloseBraceOnNewLine(self):
 451     self.VerifyContentsProducesOutput("""
 452 @media { /* TODO(dbeam) Fix this case. */
 453   .rule {
 454     display: block;
 455   }}
 456
 457 @-webkit-keyframe blah {
 458   100% { height: -500px 0; }
 459 }
 460
 461 #rule {
 462   rule: value; }""", """
 463 - Always put a rule closing brace (}) on a new line.
 464     rule: value; }""")
 465
 466   def testCssColonsHaveSpaceAfter(self):
 467     self.VerifyContentsProducesOutput("""
 468 div:not(.class):not([attr=5]), /* We should not catch this. */
 469 div:not(.class):not([attr]) /* Nor this. */ {
 470   background: url(data:image/jpeg,asdfasdfsadf); /* Ignore this. */
 471   background: -webkit-linear-gradient(left, red,
 472                                       80% blah blee blar);
 473   color: red;
 474   display:block;
 475 }""", """
 476 - Colons (:) should have a space after them.
 477     display:block;
 478
 479 - Don't use data URIs in source files. Use grit instead.
 480     background: url(data:image/jpeg,asdfasdfsadf);""")
 481
 482   def testCssFavorSingleQuotes(self):
 483     self.VerifyContentsProducesOutput("""
 484 html[dir="rtl"] body,
 485 html[dir=ltr] body /* TODO(dbeam): Require '' around rtl in future? */ {
 486   background: url("chrome://resources/BLAH");
 487   font-family: "Open Sans";
 488 <if expr="is_macosx">
 489   blah: blee;
 490 </if>
 491 }""", """
 492 - Use single quotes (') instead of double quotes (") in strings.
 493     html[dir="rtl"] body,
 494     background: url("chrome://resources/BLAH");
 495     font-family: "Open Sans";""")
 496
 497   def testCssHexCouldBeShorter(self):
 498     self.VerifyContentsProducesOutput("""
 499 #abc,
 500 #abc-,
 501 #abc-ghij,
 502 #abcdef-,
 503 #abcdef-ghij,
 504 #aaaaaa,
 505 #bbaacc {
 506   background-color: #336699; /* Ignore short hex rule if not gray. */
 507   color: #999999;
 508   color: #666;
 509 }""", """
 510 - Use abbreviated hex (#rgb) when in form #rrggbb.
 511     color: #999999; (replace with #999)
 512
 513 - Use rgb() over #hex when not a shade of gray (like #333).
 514     background-color: #336699; (replace with rgb(51, 102, 153))""")
 515
 516   def testCssUseMillisecondsForSmallTimes(self):
 517     self.VerifyContentsProducesOutput("""
 518 .transition-0s /* This is gross but may happen. */ {
 519   transform: one 0.2s;
 520   transform: two .1s;
 521   transform: tree 1s;
 522   transform: four 300ms;
 523 }""", """
 524 - Use milliseconds for time measurements under 1 second.
 525     transform: one 0.2s; (replace with 200ms)
 526     transform: two .1s; (replace with 100ms)""")
 527
 528   def testCssNoDataUrisInSourceFiles(self):
 529     self.VerifyContentsProducesOutput("""
 530 img {
 531   background: url( data:image/jpeg,4\/\/350|\/|3|2 );
 532   background: url('data:image/jpeg,4\/\/350|\/|3|2');
 533 }""", """
 534 - Don't use data URIs in source files. Use grit instead.
 535     background: url( data:image/jpeg,4\/\/350|\/|3|2 );
 536     background: url('data:image/jpeg,4\/\/350|\/|3|2');""")
 537
 538   def testCssOneRulePerLine(self):
 539     self.VerifyContentsProducesOutput("""
 540 a:not([hidden]):not(.custom-appearance):not([version=1]):first-of-type,
 541 a:not([hidden]):not(.custom-appearance):not([version=1]):first-of-type ~
 542     input[type='checkbox']:not([hidden]),
 543 div {
 544   background: url(chrome://resources/BLAH);
 545   rule: value; /* rule: value; */
 546   rule: value; rule: value;
 547 }""", """
 548 - One rule per line (what not to do: color: red; margin: 0;).
 549     rule: value; rule: value;""")
 550
 551   def testCssOneSelectorPerLine(self):
 552     self.VerifyContentsProducesOutput("""
 553 a,
 554 div,a,
 555 div,/* Hello! */ span,
 556 #id.class([dir=rtl):not(.class):any(a, b, d) {
 557   rule: value;
 558 }
 559
 560 a,
 561 div,a {
 562   some-other: rule here;
 563 }""", """
 564 - One selector per line (what not to do: a, b {}).
 565     div,a,
 566     div, span,
 567     div,a {""")
 568
 569   def testCssPseudoElementDoubleColon(self):
 570     self.VerifyContentsProducesOutput("""
 571 a:href,
 572 br::after,
 573 ::-webkit-scrollbar-thumb,
 574 a:not([empty]):hover:focus:active, /* shouldn't catch here and above */
 575 abbr:after,
 576 .tree-label:empty:after,
 577 b:before,
 578 :-WebKit-ScrollBar {
 579   rule: value;
 580 }""", """
 581 - Pseudo-elements should use double colon (i.e. ::after).
 582     :after (should be ::after)
 583     :after (should be ::after)
 584     :before (should be ::before)
 585     :-WebKit-ScrollBar (should be ::-WebKit-ScrollBar)
 586     """)
 587
 588   def testCssRgbIfNotGray(self):
 589     self.VerifyContentsProducesOutput("""
 590 #abc,
 591 #aaa,
 592 #aabbcc {
 593   background: -webkit-linear-gradient(left, from(#abc), to(#def));
 594   color: #bad;
 595   color: #bada55;
 596 }""", """
 597 - Use rgb() over #hex when not a shade of gray (like #333).
 598     background: -webkit-linear-gradient(left, from(#abc), to(#def)); """
 599 """(replace with rgb(170, 187, 204), rgb(221, 238, 255))
 600     color: #bad; (replace with rgb(187, 170, 221))
 601     color: #bada55; (replace with rgb(186, 218, 85))""")
 602
 603   def testCssZeroLengthTerms(self):
 604     self.VerifyContentsProducesOutput("""
 605 @-webkit-keyframe anim {
 606   0% { /* Ignore key frames */
 607     width: 0px;
 608   }
 609   10% {
 610     width: 10px;
 611   }
 612   100% {
 613     width: 100px;
 614   }
 615 }
 616
 617 /* http://crbug.com/359682 */
 618 #spinner-container #spinner {
 619   -webkit-animation-duration: 1.0s;
 620 }
 621
 622 .media-button.play > .state0.active,
 623 .media-button[state='0'] > .state0.normal /* blah */, /* blee */
 624 .media-button[state='0']:not(.disabled):hover > .state0.hover {
 625   -webkit-animation: anim 0s;
 626   -webkit-animation-duration: anim 0ms;
 627   -webkit-transform: scale(0%),
 628                      translateX(0deg),
 629                      translateY(0rad),
 630                      translateZ(0grad);
 631   background-position-x: 0em;
 632   background-position-y: 0ex;
 633   border-width: 0em;
 634   color: hsl(0, 0%, 85%); /* Shouldn't trigger error. */
 635   opacity: .0;
 636   opacity: 0.0;
 637   opacity: 0.;
 638 }
 639
 640 @page {
 641   border-width: 0mm;
 642   height: 0cm;
 643   width: 0in;
 644 }""", """
 645 - Make all zero length terms (i.e. 0px) 0 unless inside of hsl() or part of"""
 646 """ @keyframe.
 647     width: 0px;
 648     -webkit-animation: anim 0s;
 649     -webkit-animation-duration: anim 0ms;
 650     -webkit-transform: scale(0%),
 651     translateX(0deg),
 652     translateY(0rad),
 653     translateZ(0grad);
 654     background-position-x: 0em;
 655     background-position-y: 0ex;
 656     border-width: 0em;
 657     opacity: .0;
 658     opacity: 0.0;
 659     opacity: 0.;
 660     border-width: 0mm;
 661     height: 0cm;
 662     width: 0in;
 663 """)
 664
 665 if __name__ == '__main__':
 666   unittest.main()