ObjectCacheTest.php

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<?php

class ObjectCacheTest extends MediaWikiTestCase {

    protected function setUp() {
        // Parent calls ObjectCache::clear() among other things
        parent::setUp();

        $this->setCacheConfig();
        $this->setMwGlobals( [
            'wgMainCacheType' => CACHE_NONE,
            'wgMessageCacheType' => CACHE_NONE,
            'wgParserCacheType' => CACHE_NONE,
        ] );
    }

    private function setCacheConfig( $arr = [] ) {
        $defaults = [
            CACHE_NONE => [ 'class' => 'EmptyBagOStuff' ],
            CACHE_DB => [ 'class' => 'SqlBagOStuff' ],
            CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
            // Mock ACCEL with 'hash' as being installed.
            // This makes tests deterministic regardless of APC.
            CACHE_ACCEL => [ 'class' => 'HashBagOStuff' ],
            'hash' => [ 'class' => 'HashBagOStuff' ],
        ];
        $this->setMwGlobals( 'wgObjectCaches', $arr + $defaults );
    }

    public function testNewAnythingNothing() {
        $this->assertInstanceOf(
            SqlBagOStuff::class,
            ObjectCache::newAnything( [] ),
            'No available types. Fallback to DB'
        );
    }

    public function testNewAnythingHash() {
        $this->setMwGlobals( [
            'wgMainCacheType' => 'hash'
        ] );

        $this->assertInstanceOf(
            HashBagOStuff::class,
            ObjectCache::newAnything( [] ),
            'Use an available type (hash)'
        );
    }

    public function testNewAnythingAccel() {
        $this->setMwGlobals( [
            'wgMainCacheType' => CACHE_ACCEL
        ] );

        $this->assertInstanceOf(
            HashBagOStuff::class,
            ObjectCache::newAnything( [] ),
            'Use an available type (CACHE_ACCEL)'
        );
    }

    public function txestNewAnythingNoAccel() {
        $this->setMwGlobals( [
            'wgMainCacheType' => CACHE_ACCEL
        ] );

        $this->setCacheConfig( [
            // Mock APC not being installed (T160519, T147161)
            CACHE_ACCEL => [ 'class' => 'EmptyBagOStuff' ]
        ] );

        $this->assertInstanceOf(
            SqlBagOStuff::class,
            ObjectCache::newAnything( [] ),
            'Fallback to DB if available types fall back to Empty'
        );
    }
}