Doctrine\MongoDB\Tests\Query\BuilderTest::testSetReadPreference PHP Method

    public function testSetReadPreference()
    {
        $qb = $this->getTestQueryBuilder();
        $qb->setReadPreference('secondary', [['dc' => 'east']]);
        $this->assertEquals('secondary', $qb->debug('readPreference'));
        $this->assertEquals([['dc' => 'east']], $qb->debug('readPreferenceTags'));
    }