tests/phpunit/includes/libs/CSSMinTest.php

   1 <?php
   2 /**
   3  * This file test the CSSMin library shipped with Mediawiki.
   4  *
   5  * @author Timo Tijhof
   6  */
   7
   8 /**
   9  * @group ResourceLoader
  10  * @group CSSMin
  11  */
  12 class CSSMinTest extends MediaWikiTestCase {
  13
  14         protected function setUp() {
  15                 parent::setUp();
  16
  17                 $server = 'http://doc.example.org';
  18
  19                 $this->setMwGlobals( [
  20                         'wgServer' => $server,
  21                         'wgCanonicalServer' => $server,
  22                 ] );
  23         }
  24
  25         /**
  26          * @dataProvider mimeTypeProvider
  27          */
  28         public function testGetMimeType( $fileContents, $fileExtension, $expected ) {
  29                 $fileName = wfTempDir() . DIRECTORY_SEPARATOR . uniqid( 'MW_PHPUnit_CSSMinTest_' ) . '.'
  30                         . $fileExtension;
  31                 $this->addTmpFiles( $fileName );
  32                 file_put_contents( $fileName, $fileContents );
  33                 $this->assertSame( $expected, CSSMin::getMimeType( $fileName ) );
  34         }
  35
  36         public function mimeTypeProvider() {
  37                 return [
  38                         'JPEG with short extension' => [
  39                                 "\xFF\xD8\xFF",
  40                                 'jpg',
  41                                 'image/jpeg'
  42                         ],
  43                         'JPEG with long extension' => [
  44                                 "\xFF\xD8\xFF",
  45                                 'jpeg',
  46                                 'image/jpeg'
  47                         ],
  48                         'PNG' => [
  49                                 "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A",
  50                                 'png',
  51                                 'image/png'
  52                         ],
  53
  54                         'PNG extension but JPEG content' => [
  55                                 "\xFF\xD8\xFF",
  56                                 'png',
  57                                 'image/png'
  58                         ],
  59                         'JPEG extension but PNG content' => [
  60                                 "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A",
  61                                 'jpg',
  62                                 'image/jpeg'
  63                         ],
  64                         'PNG extension but SVG content' => [
  65                                 '<?xml version="1.0"?><svg></svg>',
  66                                 'png',
  67                                 'image/png'
  68                         ],
  69                         'SVG extension but PNG content' => [
  70                                 "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A",
  71                                 'svg',
  72                                 'image/svg+xml'
  73                         ],
  74
  75                         'SVG with all headers' => [
  76                                 '<?xml version="1.0"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" '
  77                                 . '"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg></svg>',
  78                                 'svg',
  79                                 'image/svg+xml'
  80                         ],
  81                         'SVG with XML header only' => [
  82                                 '<?xml version="1.0"?><svg></svg>',
  83                                 'svg',
  84                                 'image/svg+xml'
  85                         ],
  86                         'SVG with DOCTYPE only' => [
  87                                 '<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" '
  88                                 . '"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg></svg>',
  89                                 'svg',
  90                                 'image/svg+xml'
  91                         ],
  92                         'SVG without any header' => [
  93                                 '<svg></svg>',
  94                                 'svg',
  95                                 'image/svg+xml'
  96                         ],
  97                 ];
  98         }
  99
 100         /**
 101          * @dataProvider provideMinifyCases
 102          * @covers CSSMin::minify
 103          */
 104         public function testMinify( $code, $expectedOutput ) {
 105                 $minified = CSSMin::minify( $code );
 106
 107                 $this->assertEquals(
 108                         $expectedOutput,
 109                         $minified,
 110                         'Minified output should be in the form expected.'
 111                 );
 112         }
 113
 114         public static function provideMinifyCases() {
 115                 return [
 116                         // Whitespace
 117                         [ "\r\t\f \v\n\r", "" ],
 118                         [ "foo, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ],
 119
 120                         // Loose comments
 121                         [ "/* foo */", "" ],
 122                         [ "/*******\n foo\n *******/", "" ],
 123                         [ "/*!\n foo\n */", "" ],
 124
 125                         // Inline comments in various different places
 126                         [ "/* comment */foo, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ],
 127                         [ "foo/* comment */, bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ],
 128                         [ "foo,/* comment */ bar {\n\tprop: value;\n}", "foo,bar{prop:value}" ],
 129                         [ "foo, bar/* comment */ {\n\tprop: value;\n}", "foo,bar{prop:value}" ],
 130                         [ "foo, bar {\n\t/* comment */prop: value;\n}", "foo,bar{prop:value}" ],
 131                         [ "foo, bar {\n\tprop: /* comment */value;\n}", "foo,bar{prop:value}" ],
 132                         [ "foo, bar {\n\tprop: value /* comment */;\n}", "foo,bar{prop:value }" ],
 133                         [ "foo, bar {\n\tprop: value; /* comment */\n}", "foo,bar{prop:value; }" ],
 134
 135                         // Keep track of things that aren't as minified as much as they
 136                         // could be (T37493)
 137                         [ 'foo { prop: value ;}', 'foo{prop:value }' ],
 138                         [ 'foo { prop : value; }', 'foo{prop :value}' ],
 139                         [ 'foo { prop: value ; }', 'foo{prop:value }' ],
 140                         [ 'foo { font-family: "foo" , "bar"; }', 'foo{font-family:"foo" ,"bar"}' ],
 141                         [ "foo { src:\n\turl('foo') ,\n\turl('bar') ; }", "foo{src:url('foo') ,url('bar') }" ],
 142
 143                         // Interesting cases with string values
 144                         // - Double quotes, single quotes
 145                         [ 'foo { content: ""; }', 'foo{content:""}' ],
 146                         [ "foo { content: ''; }", "foo{content:''}" ],
 147                         [ 'foo { content: "\'"; }', 'foo{content:"\'"}' ],
 148                         [ "foo { content: '\"'; }", "foo{content:'\"'}" ],
 149                         // - Whitespace in string values
 150                         [ 'foo { content: " "; }', 'foo{content:" "}' ],
 151                 ];
 152         }
 153
 154         /**
 155          * This tests funky parameters to CSSMin::remap. testRemapRemapping tests
 156          * the basic functionality.
 157          *
 158          * @dataProvider provideRemapCases
 159          * @covers CSSMin::remap
 160          */
 161         public function testRemap( $message, $params, $expectedOutput ) {
 162                 $remapped = call_user_func_array( 'CSSMin::remap', $params );
 163
 164                 $messageAdd = " Case: $message";
 165                 $this->assertEquals(
 166                         $expectedOutput,
 167                         $remapped,
 168                         'CSSMin::remap should return the expected url form.' . $messageAdd
 169                 );
 170         }
 171
 172         public static function provideRemapCases() {
 173                 // Parameter signature:
 174                 // CSSMin::remap( $code, $local, $remote, $embedData = true )
 175                 return [
 176                         [
 177                                 'Simple case',
 178                                 [ 'foo { prop: url(bar.png); }', false, 'http://example.org', false ],
 179                                 'foo { prop: url(http://example.org/bar.png); }',
 180                         ],
 181                         [
 182                                 'Without trailing slash',
 183                                 [ 'foo { prop: url(../bar.png); }', false, 'http://example.org/quux', false ],
 184                                 'foo { prop: url(http://example.org/bar.png); }',
 185                         ],
 186                         [
 187                                 'With trailing slash on remote (T29052)',
 188                                 [ 'foo { prop: url(../bar.png); }', false, 'http://example.org/quux/', false ],
 189                                 'foo { prop: url(http://example.org/bar.png); }',
 190                         ],
 191                         [
 192                                 'Guard against stripping double slashes from query',
 193                                 [ 'foo { prop: url(bar.png?corge=//grault); }', false, 'http://example.org/quux/', false ],
 194                                 'foo { prop: url(http://example.org/quux/bar.png?corge=//grault); }',
 195                         ],
 196                         [
 197                                 'Expand absolute paths',
 198                                 [ 'foo { prop: url(/w/skin/images/bar.png); }', false, 'http://example.org/quux', false ],
 199                                 'foo { prop: url(http://doc.example.org/w/skin/images/bar.png); }',
 200                         ],
 201                         [
 202                                 "Don't barf at behavior: url(#default#behaviorName) - T162973",
 203                                 [ 'foo { behavior: url(#default#bar); }', false, '/w/', false ],
 204                                 'foo { behavior: url("#default#bar"); }',
 205                         ],
 206                 ];
 207         }
 208
 209         /**
 210          * This tests basic functionality of CSSMin::remap. testRemapRemapping tests funky parameters.
 211          *
 212          * @dataProvider provideRemapRemappingCases
 213          * @covers CSSMin::remap
 214          */
 215         public function testRemapRemapping( $message, $input, $expectedOutput ) {
 216                 $localPath = __DIR__ . '/../../data/cssmin';
 217                 $remotePath = 'http://localhost/w';
 218
 219                 $realOutput = CSSMin::remap( $input, $localPath, $remotePath );
 220                 $this->assertEquals( $expectedOutput, $realOutput, "CSSMin::remap: $message" );
 221         }
 222
 223         public static function provideIsRemoteUrl() {
 224                 return [
 225                         [ true, 'http://localhost/w/red.gif?123' ],
 226                         [ true, 'https://example.org/x.png' ],
 227                         [ true, '//example.org/x.y.z/image.png' ],
 228                         [ true, '//localhost/styles.css?query=yes' ],
 229                         [ true, 'data:image/gif;base64,R0lGODlhAQABAIAAAP8AADAAACwAAAAAAQABAAACAkQBADs=' ],
 230                         [ false, 'x.gif' ],
 231                         [ false, '/x.gif' ],
 232                         [ false, './x.gif' ],
 233                         [ false, '../x.gif' ],
 234                 ];
 235         }
 236
 237         /**
 238          * @dataProvider provideIsRemoteUrl
 239          * @cover CSSMin::isRemoteUrl
 240          */
 241         public function testIsRemoteUrl( $expect, $url ) {
 242                 $this->assertEquals( CSSMinTestable::isRemoteUrl( $url ), $expect );
 243         }
 244
 245         public static function provideIsLocalUrls() {
 246                 return [
 247                         [ false, 'x.gif' ],
 248                         [ true, '/x.gif' ],
 249                         [ false, './x.gif' ],
 250                         [ false, '../x.gif' ],
 251                 ];
 252         }
 253
 254         /**
 255          * @dataProvider provideIsLocalUrls
 256          * @cover CSSMin::isLocalUrl
 257          */
 258         public function testIsLocalUrl( $expect, $url ) {
 259                 $this->assertEquals( CSSMinTestable::isLocalUrl( $url ), $expect );
 260         }
 261
 262         public static function provideRemapRemappingCases() {
 263                 // red.gif and green.gif are one-pixel 35-byte GIFs.
 264                 // large.png is a 35K PNG that should be non-embeddable.
 265                 // Full paths start with http://localhost/w/.
 266                 // Timestamps in output are replaced with 'timestamp'.
 267
 268                 // data: URIs for red.gif, green.gif, circle.svg
 269                 $red   = 'data:image/gif;base64,R0lGODlhAQABAIAAAP8AADAAACwAAAAAAQABAAACAkQBADs=';
 270                 $green = 'data:image/gif;base64,R0lGODlhAQABAIAAAACAADAAACwAAAAAAQABAAACAkQBADs=';
 271                 $svg = 'data:image/svg+xml,%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22UTF-8%22%3F%3E%0A'
 272                         . '%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%228%22%20height%3D'
 273                         . '%228%22%3E%0A%3Ccircle%20cx%3D%224%22%20cy%3D%224%22%20r%3D%222%22%2F%3E%0A%3C%2Fsvg%3E%0A';
 274
 275                 // @codingStandardsIgnoreStart Generic.Files.LineLength
 276                 return [
 277                         [
 278                                 'Regular file',
 279                                 'foo { background: url(red.gif); }',
 280                                 'foo { background: url(http://localhost/w/red.gif?34ac6); }',
 281                         ],
 282                         [
 283                                 'Regular file (missing)',
 284                                 'foo { background: url(theColorOfHerHair.gif); }',
 285                                 'foo { background: url(http://localhost/w/theColorOfHerHair.gif); }',
 286                         ],
 287                         [
 288                                 'Remote URL',
 289                                 'foo { background: url(http://example.org/w/foo.png); }',
 290                                 'foo { background: url(http://example.org/w/foo.png); }',
 291                         ],
 292                         [
 293                                 'Protocol-relative remote URL',
 294                                 'foo { background: url(//example.org/w/foo.png); }',
 295                                 'foo { background: url(//example.org/w/foo.png); }',
 296                         ],
 297                         [
 298                                 'Remote URL with query',
 299                                 'foo { background: url(http://example.org/w/foo.png?query=yes); }',
 300                                 'foo { background: url(http://example.org/w/foo.png?query=yes); }',
 301                         ],
 302                         [
 303                                 'Protocol-relative remote URL with query',
 304                                 'foo { background: url(//example.org/w/foo.png?query=yes); }',
 305                                 'foo { background: url(//example.org/w/foo.png?query=yes); }',
 306                         ],
 307                         [
 308                                 'Domain-relative URL',
 309                                 'foo { background: url(/static/foo.png); }',
 310                                 'foo { background: url(http://doc.example.org/static/foo.png); }',
 311                         ],
 312                         [
 313                                 'Domain-relative URL with query',
 314                                 'foo { background: url(/static/foo.png?query=yes); }',
 315                                 'foo { background: url(http://doc.example.org/static/foo.png?query=yes); }',
 316                         ],
 317                         [
 318                                 'Remote URL (unnecessary quotes not preserved)',
 319                                 'foo { background: url("http://example.org/w/foo.png"); }',
 320                                 'foo { background: url(http://example.org/w/foo.png); }',
 321                         ],
 322                         [
 323                                 'Embedded file',
 324                                 'foo { /* @embed */ background: url(red.gif); }',
 325                                 "foo { background: url($red); background: url(http://localhost/w/red.gif?34ac6)!ie; }",
 326                         ],
 327                         [
 328                                 'Embedded file, other comments before the rule',
 329                                 "foo { /* Bar. */ /* @embed */ background: url(red.gif); }",
 330                                 "foo { /* Bar. */ background: url($red); /* Bar. */ background: url(http://localhost/w/red.gif?34ac6)!ie; }",
 331                         ],
 332                         [
 333                                 'Can not re-embed data: URIs',
 334                                 "foo { /* @embed */ background: url($red); }",
 335                                 "foo { background: url($red); }",
 336                         ],
 337                         [
 338                                 'Can not remap data: URIs',
 339                                 "foo { background: url($red); }",
 340                                 "foo { background: url($red); }",
 341                         ],
 342                         [
 343                                 'Can not embed remote URLs',
 344                                 'foo { /* @embed */ background: url(http://example.org/w/foo.png); }',
 345                                 'foo { background: url(http://example.org/w/foo.png); }',
 346                         ],
 347                         [
 348                                 'Embedded file (inline @embed)',
 349                                 'foo { background: /* @embed */ url(red.gif); }',
 350                                 "foo { background: url($red); "
 351                                         . "background: url(http://localhost/w/red.gif?34ac6)!ie; }",
 352                         ],
 353                         [
 354                                 'Can not embed large files',
 355                                 'foo { /* @embed */ background: url(large.png); }',
 356                                 "foo { background: url(http://localhost/w/large.png?e3d1f); }",
 357                         ],
 358                         [
 359                                 'SVG files are embedded without base64 encoding and unnecessary IE 6 and 7 fallback',
 360                                 'foo { /* @embed */ background: url(circle.svg); }',
 361                                 "foo { background: url($svg); }",
 362                         ],
 363                         [
 364                                 'Two regular files in one rule',
 365                                 'foo { background: url(red.gif), url(green.gif); }',
 366                                 'foo { background: url(http://localhost/w/red.gif?34ac6), '
 367                                         . 'url(http://localhost/w/green.gif?13651); }',
 368                         ],
 369                         [
 370                                 'Two embedded files in one rule',
 371                                 'foo { /* @embed */ background: url(red.gif), url(green.gif); }',
 372                                 "foo { background: url($red), url($green); "
 373                                         . "background: url(http://localhost/w/red.gif?34ac6), "
 374                                         . "url(http://localhost/w/green.gif?13651)!ie; }",
 375                         ],
 376                         [
 377                                 'Two embedded files in one rule (inline @embed)',
 378                                 'foo { background: /* @embed */ url(red.gif), /* @embed */ url(green.gif); }',
 379                                 "foo { background: url($red), url($green); "
 380                                         . "background: url(http://localhost/w/red.gif?34ac6), "
 381                                         . "url(http://localhost/w/green.gif?13651)!ie; }",
 382                         ],
 383                         [
 384                                 'Two embedded files in one rule (inline @embed), one too large',
 385                                 'foo { background: /* @embed */ url(red.gif), /* @embed */ url(large.png); }',
 386                                 "foo { background: url($red), url(http://localhost/w/large.png?e3d1f); "
 387                                         . "background: url(http://localhost/w/red.gif?34ac6), "
 388                                         . "url(http://localhost/w/large.png?e3d1f)!ie; }",
 389                         ],
 390                         [
 391                                 'Practical example with some noise',
 392                                 'foo { /* @embed */ background: #f9f9f9 url(red.gif) 0 0 no-repeat; }',
 393                                 "foo { background: #f9f9f9 url($red) 0 0 no-repeat; "
 394                                         . "background: #f9f9f9 url(http://localhost/w/red.gif?34ac6) 0 0 no-repeat!ie; }",
 395                         ],
 396                         [
 397                                 'Does not mess with other properties',
 398                                 'foo { color: red; background: url(red.gif); font-size: small; }',
 399                                 'foo { color: red; background: url(http://localhost/w/red.gif?34ac6); font-size: small; }',
 400                         ],
 401                         [
 402                                 'Spacing and miscellanea not changed (1)',
 403                                 'foo {   background:    url(red.gif);  }',
 404                                 'foo {   background:    url(http://localhost/w/red.gif?34ac6);  }',
 405                         ],
 406                         [
 407                                 'Spacing and miscellanea not changed (2)',
 408                                 'foo {background:url(red.gif)}',
 409                                 'foo {background:url(http://localhost/w/red.gif?34ac6)}',
 410                         ],
 411                         [
 412                                 'Spaces within url() parentheses are ignored',
 413                                 'foo { background: url( red.gif ); }',
 414                                 'foo { background: url(http://localhost/w/red.gif?34ac6); }',
 415                         ],
 416                         [
 417                                 '@import rule to local file (should we remap this?)',
 418                                 '@import url(/styles.css)',
 419                                 '@import url(http://doc.example.org/styles.css)',
 420                         ],
 421                         [
 422                                 '@import rule to URL (should we remap this?)',
 423                                 '@import url(//localhost/styles.css?query=yes)',
 424                                 '@import url(//localhost/styles.css?query=yes)',
 425                         ],
 426                         [
 427                                 'Simple case with comments before url',
 428                                 'foo { prop: /* some {funny;} comment */ url(bar.png); }',
 429                                 'foo { prop: /* some {funny;} comment */ url(http://localhost/w/bar.png); }',
 430                         ],
 431                         [
 432                                 'Simple case with comments after url',
 433                                 'foo { prop: url(red.gif)/* some {funny;} comment */ ; }',
 434                                 'foo { prop: url(http://localhost/w/red.gif?34ac6)/* some {funny;} comment */ ; }',
 435                         ],
 436                         [
 437                                 'Embedded file with comment before url',
 438                                 'foo { /* @embed */ background: /* some {funny;} comment */ url(red.gif); }',
 439                                 "foo { background: /* some {funny;} comment */ url($red); background: /* some {funny;} comment */ url(http://localhost/w/red.gif?34ac6)!ie; }",
 440                         ],
 441                         [
 442                                 'Embedded file with comments inside and outside the rule',
 443                                 'foo { /* @embed */ background: url(red.gif) /* some {foo;} comment */; /* some {bar;} comment */ }',
 444                                 "foo { background: url($red) /* some {foo;} comment */; background: url(http://localhost/w/red.gif?34ac6) /* some {foo;} comment */!ie; /* some {bar;} comment */ }",
 445                         ],
 446                         [
 447                                 'Embedded file with comment outside the rule',
 448                                 'foo { /* @embed */ background: url(red.gif); /* some {funny;} comment */ }',
 449                                 "foo { background: url($red); background: url(http://localhost/w/red.gif?34ac6)!ie; /* some {funny;} comment */ }",
 450                         ],
 451                         [
 452                                 'Rule with two urls, each with comments',
 453                                 '{ background: /*asd*/ url(something.png); background: /*jkl*/ url(something.png); }',
 454                                 '{ background: /*asd*/ url(http://localhost/w/something.png); background: /*jkl*/ url(http://localhost/w/something.png); }',
 455                         ],
 456                         [
 457                                 'Sanity check for offending line from jquery.ui.theme.css (T62077)',
 458                                 '.ui-state-default, .ui-widget-content .ui-state-default, .ui-widget-header .ui-state-default { border: 1px solid #d3d3d3/*{borderColorDefault}*/; background: #e6e6e6/*{bgColorDefault}*/ url(images/ui-bg_glass_75_e6e6e6_1x400.png)/*{bgImgUrlDefault}*/ 50%/*{bgDefaultXPos}*/ 50%/*{bgDefaultYPos}*/ repeat-x/*{bgDefaultRepeat}*/; font-weight: normal/*{fwDefault}*/; color: #555555/*{fcDefault}*/; }',
 459                                 '.ui-state-default, .ui-widget-content .ui-state-default, .ui-widget-header .ui-state-default { border: 1px solid #d3d3d3/*{borderColorDefault}*/; background: #e6e6e6/*{bgColorDefault}*/ url(http://localhost/w/images/ui-bg_glass_75_e6e6e6_1x400.png)/*{bgImgUrlDefault}*/ 50%/*{bgDefaultXPos}*/ 50%/*{bgDefaultYPos}*/ repeat-x/*{bgDefaultRepeat}*/; font-weight: normal/*{fwDefault}*/; color: #555555/*{fcDefault}*/; }',
 460                         ],
 461                 ];
 462                 // @codingStandardsIgnoreEnd
 463         }
 464
 465         /**
 466          * This tests basic functionality of CSSMin::buildUrlValue.
 467          *
 468          * @dataProvider provideBuildUrlValueCases
 469          * @covers CSSMin::buildUrlValue
 470          */
 471         public function testBuildUrlValue( $message, $input, $expectedOutput ) {
 472                 $this->assertEquals(
 473                         $expectedOutput,
 474                         CSSMin::buildUrlValue( $input ),
 475                         "CSSMin::buildUrlValue: $message"
 476                 );
 477         }
 478
 479         public static function provideBuildUrlValueCases() {
 480                 return [
 481                         [
 482                                 'Full URL',
 483                                 'scheme://user@domain:port/~user/fi%20le.png?query=yes&really=y+s',
 484                                 'url(scheme://user@domain:port/~user/fi%20le.png?query=yes&really=y+s)',
 485                         ],
 486                         [
 487                                 'data: URI',
 488                                 'data:image/png;base64,R0lGODlh/+==',
 489                                 'url(data:image/png;base64,R0lGODlh/+==)',
 490                         ],
 491                         [
 492                                 'URL with quotes',
 493                                 "https://en.wikipedia.org/wiki/Wendy's",
 494                                 "url(\"https://en.wikipedia.org/wiki/Wendy's\")",
 495                         ],
 496                         [
 497                                 'URL with parentheses',
 498                                 'https://en.wikipedia.org/wiki/Boston_(band)',
 499                                 'url("https://en.wikipedia.org/wiki/Boston_(band)")',
 500                         ],
 501                 ];
 502         }
 503
 504         /**
 505          * Seperated because they are currently broken (T37492)
 506          *
 507          * @group Broken
 508          * @dataProvider provideStringCases
 509          * @covers CSSMin::remap
 510          */
 511         public function testMinifyWithCSSStringValues( $code, $expectedOutput ) {
 512                 $this->testMinifyOutput( $code, $expectedOutput );
 513         }
 514
 515         public static function provideStringCases() {
 516                 return [
 517                         // String values should be respected
 518                         // - More than one space in a string value
 519                         [ 'foo { content: "  "; }', 'foo{content:"  "}' ],
 520                         // - Using a tab in a string value (turns into a space)
 521                         [ "foo { content: '\t'; }", "foo{content:'\t'}" ],
 522                         // - Using css-like syntax in string values
 523                         [
 524                                 'foo::after { content: "{;}"; position: absolute; }',
 525                                 'foo::after{content:"{;}";position:absolute}'
 526                         ],
 527                 ];
 528         }
 529 }
 530
 531 class CSSMinTestable extends CSSMin {
 532         // Make some protected methods public
 533         public static function isRemoteUrl( $maybeUrl ) {
 534                 return parent::isRemoteUrl( $maybeUrl );
 535         }
 536         public static function isLocalUrl( $maybeUrl ) {
 537                 return parent::isLocalUrl( $maybeUrl );
 538         }
 539 }