GenericArrayObjectTest.php

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<?php

abstract class GenericArrayObjectTest extends MediaWikiTestCase {

        public abstract function elementInstancesProvider();

        public abstract function getInstanceClass();

        public function instanceProvider() {
                $instances = array();

                foreach ( $this->elementInstancesProvider() as $elementInstances ) {
                        $instances[] = $this->getNew( $elementInstances );
                }

                return $this->arrayWrap( $instances );
        }

        protected function getNew( array $elements = array() ) {
                $class = $this->getInstanceClass();
                return new $class( $elements );
        }

        public function testConstructor( array $elements ) {
                $arrayObject = $this->getNew( $elements );

                $this->assertEquals( count( $elements ), $arrayObject->count() );
        }

        public function testIsEmpty( array $elements ) {
                $arrayObject = $this->getNew( $elements );

                $this->assertEquals( $elements === array(), $arrayObject->isEmpty() );
        }

        public function testUnset( GenericArrayObject $list ) {
                if ( !$list->isEmpty() ) {
                        $offset = $list->getIterator()->key();
                        $count = $list->count();
                        $list->offsetUnset( $offset );
                        $this->assertEquals( $count - 1, $list->count() );
                }

                if ( !$list->isEmpty() ) {
                        $offset = $list->getIterator()->key();
                        $count = $list->count();
                        unset( $list[$offset] );
                        $this->assertEquals( $count - 1, $list->count() );
                }

                $exception = null;
                try { $list->offsetUnset( 'sdfsedtgsrdysftu' ); } catch ( \Exception $exception ){}
                $this->assertInstanceOf( '\Exception', $exception );
        }

        public function testAppend( array $elements ) {
                $list = $this->getNew();

                $listSize = count( $elements );

                foreach ( $elements as $element ) {
                        $list->append( $element );
                }

                $this->assertEquals( $listSize, $list->count() );

                $list = $this->getNew();

                foreach ( $elements as $element ) {
                        $list[] = $element;
                }

                $this->assertEquals( $listSize, $list->count() );

                $this->checkTypeChecks( function( GenericArrayObject $list, $element ) {
                        $list->append( $element );
                } );
        }

        protected function checkTypeChecks( $function ) {
                $excption = null;
                $list = $this->getNew();

                $elementClass = $list->getObjectType();

                foreach ( array( 42, 'foo', array(), new \stdClass(), 4.2 ) as $element ) {
                        $validValid = $element instanceof $elementClass;

                        try{
                                call_user_func( $function, $list, $element );
                                $valid = true;
                        }
                        catch ( InvalidArgumentException $exception ) {
                                $valid = false;
                        }

                        $this->assertEquals(
                                $validValid,
                                $valid,
                                'Object of invalid type got successfully added to a GenericArrayObject'
                        );
                }
        }

        public function testOffsetSet( array $elements ) {
                if ( $elements === array() ) {
                        $this->assertTrue( true );
                        return;
                }

                $list = $this->getNew();

                $element = reset( $elements );
                $list->offsetSet( 42, $element );
                $this->assertEquals( $element, $list->offsetGet( 42 ) );

                $list = $this->getNew();

                $element = reset( $elements );
                $list['oHai'] = $element;
                $this->assertEquals( $element, $list['oHai'] );

                $list = $this->getNew();

                $element = reset( $elements );
                $list->offsetSet( 9001, $element );
                $this->assertEquals( $element, $list[9001] );

                $list = $this->getNew();

                $element = reset( $elements );
                $list->offsetSet( null, $element );
                $this->assertEquals( $element, $list[0] );

                $list = $this->getNew();
                $offset = 0;

                foreach ( $elements as $element ) {
                        $list->offsetSet( null, $element );
                        $this->assertEquals( $element, $list[$offset++] );
                }

                $this->assertEquals( count( $elements ), $list->count() );

                $this->checkTypeChecks( function( GenericArrayObject $list, $element ) {
                        $list->offsetSet( mt_rand(), $element );
                } );
        }

}