HashBagOStuffTest.php

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<?php
 
use Wikimedia\TestingAccessWrapper;
 
class HashBagOStuffTest extends PHPUnit_Framework_TestCase {
 
    public function testConstruct() {
        $this->assertInstanceOf(
            HashBagOStuff::class,
            new HashBagOStuff()
        );
    }
 
    public function testConstructBadZero() {
        $cache = new HashBagOStuff( [ 'maxKeys' => 0 ] );
    }
 
    public function testConstructBadNeg() {
        $cache = new HashBagOStuff( [ 'maxKeys' => -1 ] );
    }
 
    public function testConstructBadType() {
        $cache = new HashBagOStuff( [ 'maxKeys' => 'x' ] );
    }
 
    public function testDelete() {
        $cache = new HashBagOStuff();
        for ( $i = 0; $i < 10; $i++ ) {
            $cache->set( "key$i", 1 );
            $this->assertEquals( 1, $cache->get( "key$i" ) );
            $cache->delete( "key$i" );
            $this->assertEquals( false, $cache->get( "key$i" ) );
        }
    }
 
    public function testClear() {
        $cache = new HashBagOStuff();
        for ( $i = 0; $i < 10; $i++ ) {
            $cache->set( "key$i", 1 );
            $this->assertEquals( 1, $cache->get( "key$i" ) );
        }
        $cache->clear();
        for ( $i = 0; $i < 10; $i++ ) {
            $this->assertEquals( false, $cache->get( "key$i" ) );
        }
    }
 
    public function testExpire() {
        $cache = new HashBagOStuff();
        $cacheInternal = TestingAccessWrapper::newFromObject( $cache );
        $cache->set( 'foo', 1 );
        $cache->set( 'bar', 1, 10 );
        $cache->set( 'baz', 1, -10 );
 
        $this->assertEquals( 0, $cacheInternal->bag['foo'][$cache::KEY_EXP], 'Indefinite' );
        // 2 seconds tolerance
        $this->assertEquals( time() + 10, $cacheInternal->bag['bar'][$cache::KEY_EXP], 'Future', 2 );
        $this->assertEquals( time() - 10, $cacheInternal->bag['baz'][$cache::KEY_EXP], 'Past', 2 );
 
        $this->assertEquals( 1, $cache->get( 'bar' ), 'Key not expired' );
        $this->assertEquals( false, $cache->get( 'baz' ), 'Key expired' );
    }
 
    public function testEvictionAdd() {
        $cache = new HashBagOStuff( [ 'maxKeys' => 10 ] );
        for ( $i = 0; $i < 10; $i++ ) {
            $cache->set( "key$i", 1 );
            $this->assertEquals( 1, $cache->get( "key$i" ) );
        }
        for ( $i = 10; $i < 20; $i++ ) {
            $cache->set( "key$i", 1 );
            $this->assertEquals( 1, $cache->get( "key$i" ) );
            $this->assertEquals( false, $cache->get( "key" . $i - 10 ) );
        }
    }
 
    public function testEvictionSet() {
        $cache = new HashBagOStuff( [ 'maxKeys' => 3 ] );
 
        foreach ( [ 'foo', 'bar', 'baz' ] as $key ) {
            $cache->set( $key, 1 );
        }
 
        // Set existing key
        $cache->set( 'foo', 1 );
 
        // Add a 4th key (beyond the allowed maximum)
        $cache->set( 'quux', 1 );
 
        // Foo's life should have been extended over Bar
        foreach ( [ 'foo', 'baz', 'quux' ] as $key ) {
            $this->assertEquals( 1, $cache->get( $key ), "Kept $key" );
        }
        $this->assertEquals( false, $cache->get( 'bar' ), 'Evicted bar' );
    }
 
    public function testEvictionGet() {
        $cache = new HashBagOStuff( [ 'maxKeys' => 3 ] );
 
        foreach ( [ 'foo', 'bar', 'baz' ] as $key ) {
            $cache->set( $key, 1 );
        }
 
        // Get existing key
        $cache->get( 'foo', 1 );
 
        // Add a 4th key (beyond the allowed maximum)
        $cache->set( 'quux', 1 );
 
        // Foo's life should have been extended over Bar
        foreach ( [ 'foo', 'baz', 'quux' ] as $key ) {
            $this->assertEquals( 1, $cache->get( $key ), "Kept $key" );
        }
        $this->assertEquals( false, $cache->get( 'bar' ), 'Evicted bar' );
    }
}