Alcaeus\MongoDbAdapter\Tests\Mongo\MongoClientTest::testReadPreference PHP Method

    public function testReadPreference()
    {
        $client = $this->getClient();
        $this->assertSame(['type' => \MongoClient::RP_PRIMARY], $client->getReadPreference());
        $this->assertTrue($client->setReadPreference(\MongoClient::RP_SECONDARY, [['a' => 'b']]));
        $this->assertSame(['type' => \MongoClient::RP_SECONDARY, 'tagsets' => [['a' => 'b']]], $client->getReadPreference());
    }