tests/phpunit/includes/libs/GenericArrayObjectTest.php

   1 <?php
   2
   3 /**
   4  * Tests for the GenericArrayObject and deriving classes.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @since 1.20
  23  *
  24  * @ingroup Test
  25  * @group GenericArrayObject
  26  *
  27  * @licence GNU GPL v2+
  28  * @author Jeroen De Dauw < jeroendedauw@gmail.com >
  29  */
  30 abstract class GenericArrayObjectTest extends MediaWikiTestCase {
  31
  32         /**
  33          * Returns objects that can serve as elements in the concrete GenericArrayObject deriving class being tested.
  34          *
  35          * @since 1.20
  36          *
  37          * @return array
  38          */
  39         public abstract function elementInstancesProvider();
  40
  41         /**
  42          * Returns the name of the concrete class being tested.
  43          *
  44          * @since 1.20
  45          *
  46          * @return string
  47          */
  48         public abstract function getInstanceClass();
  49
  50         /**
  51          * Provides instances of the concrete class being tested.
  52          *
  53          * @since 1.20
  54          *
  55          * @return array
  56          */
  57         public function instanceProvider() {
  58                 $instances = array();
  59
  60                 foreach ( $this->elementInstancesProvider() as $elementInstances ) {
  61                         $instances[] = $this->getNew( $elementInstances[0] );
  62                 }
  63
  64                 return $this->arrayWrap( $instances );
  65         }
  66
  67         /**
  68          * @since 1.20
  69          *
  70          * @param array $elements
  71          *
  72          * @return GenericArrayObject
  73          */
  74         protected function getNew( array $elements = array() ) {
  75                 $class = $this->getInstanceClass();
  76                 return new $class( $elements );
  77         }
  78
  79         /**
  80          * @dataProvider elementInstancesProvider
  81          *
  82          * @since 1.20
  83          *
  84          * @param array $elements
  85          */
  86         public function testConstructor( array $elements ) {
  87                 $arrayObject = $this->getNew( $elements );
  88
  89                 $this->assertEquals( count( $elements ), $arrayObject->count() );
  90         }
  91
  92         /**
  93          * @dataProvider elementInstancesProvider
  94          *
  95          * @since 1.20
  96          *
  97          * @param array $elements
  98          */
  99         public function testIsEmpty( array $elements ) {
 100                 $arrayObject = $this->getNew( $elements );
 101
 102                 $this->assertEquals( $elements === array(), $arrayObject->isEmpty() );
 103         }
 104
 105         /**
 106          * @dataProvider instanceProvider
 107          *
 108          * @since 1.20
 109          *
 110          * @param GenericArrayObject $list
 111          */
 112         public function testUnset( GenericArrayObject $list ) {
 113                 if ( $list->isEmpty() ) {
 114                         $this->assertTrue( true ); // We cannot test unset if there are no elements
 115                 }
 116                 else {
 117                         $offset = $list->getIterator()->key();
 118                         $count = $list->count();
 119                         $list->offsetUnset( $offset );
 120                         $this->assertEquals( $count - 1, $list->count() );
 121                 }
 122
 123                 if ( !$list->isEmpty() ) {
 124                         $offset = $list->getIterator()->key();
 125                         $count = $list->count();
 126                         unset( $list[$offset] );
 127                         $this->assertEquals( $count - 1, $list->count() );
 128                 }
 129         }
 130
 131         /**
 132          * @dataProvider elementInstancesProvider
 133          *
 134          * @since 1.20
 135          *
 136          * @param array $elements
 137          */
 138         public function testAppend( array $elements ) {
 139                 $list = $this->getNew();
 140
 141                 $listSize = count( $elements );
 142
 143                 foreach ( $elements as $element ) {
 144                         $list->append( $element );
 145                 }
 146
 147                 $this->assertEquals( $listSize, $list->count() );
 148
 149                 $list = $this->getNew();
 150
 151                 foreach ( $elements as $element ) {
 152                         $list[] = $element;
 153                 }
 154
 155                 $this->assertEquals( $listSize, $list->count() );
 156
 157                 $this->checkTypeChecks( function( GenericArrayObject $list, $element ) {
 158                         $list->append( $element );
 159                 } );
 160         }
 161
 162         /**
 163          * @since 1.20
 164          *
 165          * @param callback $function
 166          */
 167         protected function checkTypeChecks( $function ) {
 168                 $excption = null;
 169                 $list = $this->getNew();
 170
 171                 $elementClass = $list->getObjectType();
 172
 173                 foreach ( array( 42, 'foo', array(), new \stdClass(), 4.2 ) as $element ) {
 174                         $validValid = $element instanceof $elementClass;
 175
 176                         try{
 177                                 call_user_func( $function, $list, $element );
 178                                 $valid = true;
 179                         }
 180                         catch ( InvalidArgumentException $exception ) {
 181                                 $valid = false;
 182                         }
 183
 184                         $this->assertEquals(
 185                                 $validValid,
 186                                 $valid,
 187                                 'Object of invalid type got successfully added to a GenericArrayObject'
 188                         );
 189                 }
 190         }
 191
 192         /**
 193          * @dataProvider elementInstancesProvider
 194          *
 195          * @since 1.20
 196          *
 197          * @param array $elements
 198          */
 199         public function testOffsetSet( array $elements ) {
 200                 if ( $elements === array() ) {
 201                         $this->assertTrue( true );
 202                         return;
 203                 }
 204
 205                 $list = $this->getNew();
 206
 207                 $element = reset( $elements );
 208                 $list->offsetSet( 42, $element );
 209                 $this->assertEquals( $element, $list->offsetGet( 42 ) );
 210
 211                 $list = $this->getNew();
 212
 213                 $element = reset( $elements );
 214                 $list['oHai'] = $element;
 215                 $this->assertEquals( $element, $list['oHai'] );
 216
 217                 $list = $this->getNew();
 218
 219                 $element = reset( $elements );
 220                 $list->offsetSet( 9001, $element );
 221                 $this->assertEquals( $element, $list[9001] );
 222
 223                 $list = $this->getNew();
 224
 225                 $element = reset( $elements );
 226                 $list->offsetSet( null, $element );
 227                 $this->assertEquals( $element, $list[0] );
 228
 229                 $list = $this->getNew();
 230                 $offset = 0;
 231
 232                 foreach ( $elements as $element ) {
 233                         $list->offsetSet( null, $element );
 234                         $this->assertEquals( $element, $list[$offset++] );
 235                 }
 236
 237                 $this->assertEquals( count( $elements ), $list->count() );
 238
 239                 $this->checkTypeChecks( function( GenericArrayObject $list, $element ) {
 240                         $list->offsetSet( mt_rand(), $element );
 241                 } );
 242         }
 243
 244 }