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<?php
use Wikimedia\TestingAccessWrapper;
/**
* @group BagOStuff
*/
class HashBagOStuffTest extends PHPUnit\Framework\TestCase {
use MediaWikiCoversValidator;
/**
* @covers HashBagOStuff::__construct
*/
public function testConstruct() {
$this->assertInstanceOf(
HashBagOStuff::class,
new HashBagOStuff()
);
}
/**
* @covers HashBagOStuff::__construct
* @expectedException InvalidArgumentException
*/
public function testConstructBadZero() {
$cache = new HashBagOStuff( [ 'maxKeys' => 0 ] );
}
/**
* @covers HashBagOStuff::__construct
* @expectedException InvalidArgumentException
*/
public function testConstructBadNeg() {
$cache = new HashBagOStuff( [ 'maxKeys' => -1 ] );
}
/**
* @covers HashBagOStuff::__construct
* @expectedException InvalidArgumentException
*/
public function testConstructBadType() {
$cache = new HashBagOStuff( [ 'maxKeys' => 'x' ] );
}
/**
* @covers HashBagOStuff::delete
*/
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" ) );
}
}
/**
* @covers HashBagOStuff::clear
*/
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" ) );
}
}
/**
* @covers HashBagOStuff::doGet
* @covers HashBagOStuff::expire
*/
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' );
}
/**
* Ensure maxKeys eviction prefers keeping new keys.
*
* @covers HashBagOStuff::set
*/
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 ) ) );
}
}
/**
* Ensure maxKeys eviction prefers recently set keys
* even if the keys pre-exist.
*
* @covers HashBagOStuff::set
*/
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' );
}
/**
* Ensure maxKeys eviction prefers recently retrieved keys (LRU).
*
* @covers HashBagOStuff::doGet
* @covers HashBagOStuff::hasKey
*/
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' );
}
}
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