4 * Holds tests for LoadBalancer MediaWiki class.
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9 * (at your option) any later version.
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24 use Wikimedia\Rdbms\DBError
;
25 use Wikimedia\Rdbms\DatabaseDomain
;
26 use Wikimedia\Rdbms\Database
;
27 use Wikimedia\Rdbms\LoadBalancer
;
28 use Wikimedia\Rdbms\LoadMonitorNull
;
32 * @covers \Wikimedia\Rdbms\LoadBalancer
34 class LoadBalancerTest
extends MediaWikiTestCase
{
35 public function testWithoutReplica() {
36 global $wgDBserver, $wgDBname, $wgDBuser, $wgDBpassword, $wgDBtype, $wgSQLiteDataDir;
40 'host' => $wgDBserver,
41 'dbname' => $wgDBname,
42 'tablePrefix' => $this->dbPrefix(),
44 'password' => $wgDBpassword,
46 'dbDirectory' => $wgSQLiteDataDir,
48 'flags' => DBO_TRX
// REPEATABLE-READ for consistency
52 $lb = new LoadBalancer( [
53 'servers' => $servers,
54 'localDomain' => new DatabaseDomain( $wgDBname, null, $this->dbPrefix() )
57 $ld = DatabaseDomain
::newFromId( $lb->getLocalDomainID() );
58 $this->assertEquals( $wgDBname, $ld->getDatabase(), 'local domain DB set' );
59 $this->assertEquals( $this->dbPrefix(), $ld->getTablePrefix(), 'local domain prefix set' );
61 $dbw = $lb->getConnection( DB_MASTER
);
62 $this->assertTrue( $dbw->getLBInfo( 'master' ), 'master shows as master' );
63 $this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX
), "DBO_TRX set on master" );
64 $this->assertWriteAllowed( $dbw );
66 $dbr = $lb->getConnection( DB_REPLICA
);
67 $this->assertTrue( $dbr->getLBInfo( 'master' ), 'DB_REPLICA also gets the master' );
68 $this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX
), "DBO_TRX set on replica" );
70 $dbwAuto = $lb->getConnection( DB_MASTER
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
72 $dbwAuto->getFlag( $dbw::DBO_TRX
), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
73 $this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX
), "DBO_TRX still set on master" );
74 $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
76 $dbrAuto = $lb->getConnection( DB_REPLICA
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
78 $dbrAuto->getFlag( $dbw::DBO_TRX
), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
79 $this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX
), "DBO_TRX still set on replica" );
80 $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
82 $dbwAuto2 = $lb->getConnection( DB_MASTER
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
83 $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTOCOMMIT reuses connections" );
88 public function testWithReplica() {
89 global $wgDBserver, $wgDBname, $wgDBuser, $wgDBpassword, $wgDBtype, $wgSQLiteDataDir;
93 'host' => $wgDBserver,
94 'dbname' => $wgDBname,
95 'tablePrefix' => $this->dbPrefix(),
97 'password' => $wgDBpassword,
99 'dbDirectory' => $wgSQLiteDataDir,
101 'flags' => DBO_TRX
// REPEATABLE-READ for consistency
103 [ // emulated replica
104 'host' => $wgDBserver,
105 'dbname' => $wgDBname,
106 'tablePrefix' => $this->dbPrefix(),
108 'password' => $wgDBpassword,
110 'dbDirectory' => $wgSQLiteDataDir,
112 'flags' => DBO_TRX
// REPEATABLE-READ for consistency
116 $lb = new LoadBalancer( [
117 'servers' => $servers,
118 'localDomain' => new DatabaseDomain( $wgDBname, null, $this->dbPrefix() ),
119 'loadMonitorClass' => LoadMonitorNull
::class
122 $dbw = $lb->getConnection( DB_MASTER
);
123 $this->assertTrue( $dbw->getLBInfo( 'master' ), 'master shows as master' );
125 ( $wgDBserver != '' ) ?
$wgDBserver : 'localhost',
126 $dbw->getLBInfo( 'clusterMasterHost' ),
127 'cluster master set' );
128 $this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX
), "DBO_TRX set on master" );
129 $this->assertWriteAllowed( $dbw );
131 $dbr = $lb->getConnection( DB_REPLICA
);
132 $this->assertTrue( $dbr->getLBInfo( 'replica' ), 'replica shows as replica' );
134 ( $wgDBserver != '' ) ?
$wgDBserver : 'localhost',
135 $dbr->getLBInfo( 'clusterMasterHost' ),
136 'cluster master set' );
137 $this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX
), "DBO_TRX set on replica" );
138 $this->assertWriteForbidden( $dbr );
140 $dbwAuto = $lb->getConnection( DB_MASTER
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
142 $dbwAuto->getFlag( $dbw::DBO_TRX
), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
143 $this->assertTrue( $dbw->getFlag( $dbw::DBO_TRX
), "DBO_TRX still set on master" );
144 $this->assertNotEquals( $dbw, $dbwAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
146 $dbrAuto = $lb->getConnection( DB_REPLICA
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
148 $dbrAuto->getFlag( $dbw::DBO_TRX
), "No DBO_TRX with CONN_TRX_AUTOCOMMIT" );
149 $this->assertTrue( $dbr->getFlag( $dbw::DBO_TRX
), "DBO_TRX still set on replica" );
150 $this->assertNotEquals( $dbr, $dbrAuto, "CONN_TRX_AUTOCOMMIT uses separate connection" );
152 $dbwAuto2 = $lb->getConnection( DB_MASTER
, [], false, $lb::CONN_TRX_AUTOCOMMIT
);
153 $this->assertEquals( $dbwAuto2, $dbwAuto, "CONN_TRX_AUTOCOMMIT reuses connections" );
158 private function assertWriteForbidden( Database
$db ) {
160 $db->delete( 'some_table', [ 'id' => 57634126 ], __METHOD__
);
161 $this->fail( 'Write operation should have failed!' );
162 } catch ( DBError
$ex ) {
163 // check that the exception message contains "Write operation"
164 $constraint = new PHPUnit_Framework_Constraint_StringContains( 'Write operation' );
166 if ( !$constraint->evaluate( $ex->getMessage(), '', true ) ) {
167 // re-throw original error, to preserve stack trace
171 $db->rollback( __METHOD__
, 'flush' );
175 private function assertWriteAllowed( Database
$db ) {
176 $table = $db->tableName( 'some_table' );
178 $db->dropTable( 'some_table' ); // clear for sanity
179 // Use only basic SQL and trivial types for these queries for compatibility
180 $this->assertNotSame(
182 $db->query( "CREATE TABLE $table (id INT, time INT)", __METHOD__
),
185 $this->assertNotSame(
187 $db->query( "DELETE FROM $table WHERE id=57634126", __METHOD__
),
190 $this->assertNotSame(
192 $db->query( "DROP TABLE $table", __METHOD__
),
196 $db->rollback( __METHOD__
, 'flush' );
200 public function testServerAttributes() {
203 'dbname' => 'my_unittest_wiki',
204 'tablePrefix' => 'unittest_',
206 'dbDirectory' => "some_directory",
211 $lb = new LoadBalancer( [
212 'servers' => $servers,
213 'localDomain' => new DatabaseDomain( 'my_unittest_wiki', null, 'unittest_' ),
214 'loadMonitorClass' => LoadMonitorNull
::class
217 $this->assertTrue( $lb->getServerAttributes( 0 )[Database
::ATTR_DB_LEVEL_LOCKING
] );
222 'user' => 'wikiuser',
223 'password' => 'none',
224 'dbname' => 'my_unittest_wiki',
225 'tablePrefix' => 'unittest_',
229 [ // emulated replica
231 'user' => 'wikiuser',
232 'password' => 'none',
233 'dbname' => 'my_unittest_wiki',
234 'tablePrefix' => 'unittest_',
240 $lb = new LoadBalancer( [
241 'servers' => $servers,
242 'localDomain' => new DatabaseDomain( 'my_unittest_wiki', null, 'unittest_' ),
243 'loadMonitorClass' => LoadMonitorNull
::class
246 $this->assertFalse( $lb->getServerAttributes( 1 )[Database
::ATTR_DB_LEVEL_LOCKING
] );