3 * @author Matthias Mullie <mmullie@wikimedia.org>
5 class BagOStuffTest
extends MediaWikiTestCase
{
9 protected function setUp() {
12 // type defined through parameter
13 if ( $this->getCliArg( 'use-bagostuff' ) ) {
14 $name = $this->getCliArg( 'use-bagostuff' );
16 $this->cache
= ObjectCache
::newFromId( $name );
18 // no type defined - use simple hash
19 $this->cache
= new HashBagOStuff
;
22 $this->cache
->delete( wfMemcKey( 'test' ) );
26 * @covers BagOStuff::merge
27 * @covers BagOStuff::mergeViaLock
29 public function testMerge() {
30 $key = wfMemcKey( 'test' );
35 * Callback method: append "merged" to whatever is in cache.
37 * @param BagOStuff $cache
39 * @param int $existingValue
43 $callback = function ( BagOStuff
$cache, $key, $existingValue ) use ( &$usleep ) {
44 // let's pretend this is an expensive callback to test concurrent merge attempts
47 if ( $existingValue === false ) {
51 return $existingValue . 'merged';
54 // merge on non-existing value
55 $merged = $this->cache
->merge( $key, $callback, 0 );
56 $this->assertTrue( $merged );
57 $this->assertEquals( $this->cache
->get( $key ), 'merged' );
59 // merge on existing value
60 $merged = $this->cache
->merge( $key, $callback, 0 );
61 $this->assertTrue( $merged );
62 $this->assertEquals( $this->cache
->get( $key ), 'mergedmerged' );
65 * Test concurrent merges by forking this process, if:
66 * - not manually called with --use-bagostuff
67 * - pcntl_fork is supported by the system
68 * - cache type will correctly support calls over forks
70 $fork = (bool)$this->getCliArg( 'use-bagostuff' );
71 $fork &= function_exists( 'pcntl_fork' );
72 $fork &= !$this->cache
instanceof HashBagOStuff
;
73 $fork &= !$this->cache
instanceof EmptyBagOStuff
;
74 $fork &= !$this->cache
instanceof MultiWriteBagOStuff
;
76 // callback should take awhile now so that we can test concurrent merge attempts
79 // can't fork, ignore this test...
81 // wait a little, making sure that the child process is calling merge
84 // attempt a merge - this should fail
85 $merged = $this->cache
->merge( $key, $callback, 0, 1 );
87 // merge has failed because child process was merging (and we only attempted once)
88 $this->assertFalse( $merged );
90 // make sure the child's merge is completed and verify
92 $this->assertEquals( $this->cache
->get( $key ), 'mergedmergedmerged' );
94 $this->cache
->merge( $key, $callback, 0, 1 );
96 // Note: I'm not even going to check if the merge worked, I'll
97 // compare values in the parent process to test if this merge worked.
98 // I'm just going to exit this child process, since I don't want the
99 // child to output any test results (would be rather confusing to
100 // have test output twice)
107 * @covers BagOStuff::add
109 public function testAdd() {
110 $key = wfMemcKey( 'test' );
111 $this->assertTrue( $this->cache
->add( $key, 'test' ) );
114 public function testGet() {
115 $value = array( 'this' => 'is', 'a' => 'test' );
117 $key = wfMemcKey( 'test' );
118 $this->cache
->add( $key, $value );
119 $this->assertEquals( $this->cache
->get( $key ), $value );
123 * @covers BagOStuff::incr
125 public function testIncr() {
126 $key = wfMemcKey( 'test' );
127 $this->cache
->add( $key, 0 );
128 $this->cache
->incr( $key );
130 $actualValue = $this->cache
->get( $key );
131 $this->assertEquals( $expectedValue, $actualValue, 'Value should be 1 after incrementing' );
135 * @covers BagOStuff::getMulti
137 public function testGetMulti() {
138 $value1 = array( 'this' => 'is', 'a' => 'test' );
139 $value2 = array( 'this' => 'is', 'another' => 'test' );
141 $key1 = wfMemcKey( 'test1' );
142 $key2 = wfMemcKey( 'test2' );
144 $this->cache
->add( $key1, $value1 );
145 $this->cache
->add( $key2, $value2 );
148 $this->cache
->getMulti( array( $key1, $key2 ) ),
149 array( $key1 => $value1, $key2 => $value2 )
153 $this->cache
->delete( $key1 );
154 $this->cache
->delete( $key2 );
158 * @covers BagOStuff::getScopedLock
160 public function testGetScopedLock() {
161 $key = wfMemcKey( 'test' );
162 $value1 = $this->cache
->getScopedLock( $key, 0 );
163 $value2 = $this->cache
->getScopedLock( $key, 0 );
165 $this->assertType( 'ScopedCallback', $value1, 'First call returned lock' );
166 $this->assertNull( $value2, 'Duplicate call returned no lock' );
170 $value3 = $this->cache
->getScopedLock( $key, 0 );
171 $this->assertType( 'ScopedCallback', $value3, 'Lock returned callback after release' );