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-rw-r--r--tests/phpunit/includes/objectcache/BagOStuffTest.php147
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diff --git a/tests/phpunit/includes/objectcache/BagOStuffTest.php b/tests/phpunit/includes/objectcache/BagOStuffTest.php
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+<?php
+/**
+ * This class will test BagOStuff.
+ *
+ * @author Matthias Mullie <mmullie@wikimedia.org>
+ */
+class BagOStuffTest extends MediaWikiTestCase {
+ private $cache;
+
+ protected function setUp() {
+ parent::setUp();
+
+ // type defined through parameter
+ if ( $this->getCliArg( 'use-bagostuff' ) ) {
+ $name = $this->getCliArg( 'use-bagostuff' );
+
+ $this->cache = ObjectCache::newFromId( $name );
+ } else {
+ // no type defined - use simple hash
+ $this->cache = new HashBagOStuff;
+ }
+
+ $this->cache->delete( wfMemcKey( 'test' ) );
+ }
+
+ public function testMerge() {
+ $key = wfMemcKey( 'test' );
+
+ $usleep = 0;
+
+ /**
+ * Callback method: append "merged" to whatever is in cache.
+ *
+ * @param BagOStuff $cache
+ * @param string $key
+ * @param int $existingValue
+ * @use int $usleep
+ * @return int
+ */
+ $callback = function ( BagOStuff $cache, $key, $existingValue ) use ( &$usleep ) {
+ // let's pretend this is an expensive callback to test concurrent merge attempts
+ usleep( $usleep );
+
+ if ( $existingValue === false ) {
+ return 'merged';
+ }
+
+ return $existingValue . 'merged';
+ };
+
+ // merge on non-existing value
+ $merged = $this->cache->merge( $key, $callback, 0 );
+ $this->assertTrue( $merged );
+ $this->assertEquals( $this->cache->get( $key ), 'merged' );
+
+ // merge on existing value
+ $merged = $this->cache->merge( $key, $callback, 0 );
+ $this->assertTrue( $merged );
+ $this->assertEquals( $this->cache->get( $key ), 'mergedmerged' );
+
+ /*
+ * Test concurrent merges by forking this process, if:
+ * - not manually called with --use-bagostuff
+ * - pcntl_fork is supported by the system
+ * - cache type will correctly support calls over forks
+ */
+ $fork = (bool)$this->getCliArg( 'use-bagostuff' );
+ $fork &= function_exists( 'pcntl_fork' );
+ $fork &= !$this->cache instanceof HashBagOStuff;
+ $fork &= !$this->cache instanceof EmptyBagOStuff;
+ $fork &= !$this->cache instanceof MultiWriteBagOStuff;
+ if ( $fork ) {
+ // callback should take awhile now so that we can test concurrent merge attempts
+ $pid = pcntl_fork();
+ if ( $pid == -1 ) {
+ // can't fork, ignore this test...
+ } elseif ( $pid ) {
+ // wait a little, making sure that the child process is calling merge
+ usleep( 3000 );
+
+ // attempt a merge - this should fail
+ $merged = $this->cache->merge( $key, $callback, 0, 1 );
+
+ // merge has failed because child process was merging (and we only attempted once)
+ $this->assertFalse( $merged );
+
+ // make sure the child's merge is completed and verify
+ usleep( 3000 );
+ $this->assertEquals( $this->cache->get( $key ), 'mergedmergedmerged' );
+ } else {
+ $this->cache->merge( $key, $callback, 0, 1 );
+
+ // Note: I'm not even going to check if the merge worked, I'll
+ // compare values in the parent process to test if this merge worked.
+ // I'm just going to exit this child process, since I don't want the
+ // child to output any test results (would be rather confusing to
+ // have test output twice)
+ exit;
+ }
+ }
+ }
+
+ public function testAdd() {
+ $key = wfMemcKey( 'test' );
+ $this->assertTrue( $this->cache->add( $key, 'test' ) );
+ }
+
+ public function testGet() {
+ $value = array( 'this' => 'is', 'a' => 'test' );
+
+ $key = wfMemcKey( 'test' );
+ $this->cache->add( $key, $value );
+ $this->assertEquals( $this->cache->get( $key ), $value );
+ }
+
+ /**
+ * @covers BagOStuff::incr
+ */
+ public function testIncr() {
+ $key = wfMemcKey( 'test' );
+ $this->cache->add( $key, 0 );
+ $this->cache->incr( $key );
+ $expectedValue = 1;
+ $actualValue = $this->cache->get( $key );
+ $this->assertEquals( $expectedValue, $actualValue, 'Value should be 1 after incrementing' );
+ }
+
+ public function testGetMulti() {
+ $value1 = array( 'this' => 'is', 'a' => 'test' );
+ $value2 = array( 'this' => 'is', 'another' => 'test' );
+
+ $key1 = wfMemcKey( 'test1' );
+ $key2 = wfMemcKey( 'test2' );
+
+ $this->cache->add( $key1, $value1 );
+ $this->cache->add( $key2, $value2 );
+
+ $this->assertEquals(
+ $this->cache->getMulti( array( $key1, $key2 ) ),
+ array( $key1 => $value1, $key2 => $value2 )
+ );
+
+ // cleanup
+ $this->cache->delete( $key1 );
+ $this->cache->delete( $key2 );
+ }
+}