class ConnectionTest

class ConnectionTest extends DatabaseTestBase {
    
    /**
     * Tests that connections return appropriate connection objects.
     */
    public function testConnectionRouting() : void {
        // Clone the primary credentials to a replica connection.
        // Note this will result in two independent connection objects that happen
        // to point to the same place.
        $connection_info = Database::getConnectionInfo('default');
        Database::addConnectionInfo('default', 'replica', $connection_info['default']);
        $db1 = Database::getConnection('default', 'default');
        $db2 = Database::getConnection('replica', 'default');
        $this->assertNotNull($db1, 'default connection is a real connection object.');
        $this->assertNotNull($db2, 'replica connection is a real connection object.');
        $this->assertNotSame($db1, $db2, 'Each target refers to a different connection.');
        // Try to open those targets another time, that should return the same objects.
        $db1b = Database::getConnection('default', 'default');
        $db2b = Database::getConnection('replica', 'default');
        $this->assertSame($db1, $db1b, 'A second call to getConnection() returns the same object.');
        $this->assertSame($db2, $db2b, 'A second call to getConnection() returns the same object.');
        // Try to open an unknown target.
        $unknown_target = $this->randomMachineName();
        $db3 = Database::getConnection($unknown_target, 'default');
        $this->assertNotNull($db3, 'Opening an unknown target returns a real connection object.');
        $this->assertSame($db1, $db3, 'An unknown target opens the default connection.');
        // Try to open that unknown target another time, that should return the same object.
        $db3b = Database::getConnection($unknown_target, 'default');
        $this->assertSame($db3, $db3b, 'A second call to getConnection() returns the same object.');
    }
    
    /**
     * Tests that connections return appropriate connection objects.
     */
    public function testConnectionRoutingOverride() : void {
        // Clone the primary credentials to a replica connection.
        // Note this will result in two independent connection objects that happen
        // to point to the same place.
        $connection_info = Database::getConnectionInfo('default');
        Database::addConnectionInfo('default', 'replica', $connection_info['default']);
        Database::ignoreTarget('default', 'replica');
        $db1 = Database::getConnection('default', 'default');
        $db2 = Database::getConnection('replica', 'default');
        $this->assertSame($db1, $db2, 'Both targets refer to the same connection.');
    }
    
    /**
     * Tests the closing of a database connection.
     */
    public function testConnectionClosing() : void {
        // Open the default target so we have an object to compare.
        $db1 = Database::getConnection('default', 'default');
        // Try to close the default connection, then open a new one.
        Database::closeConnection('default', 'default');
        $db2 = Database::getConnection('default', 'default');
        // Opening a connection after closing it should yield an object different than the original.
        $this->assertNotSame($db1, $db2, 'Opening the default connection after it is closed returns a new object.');
    }
    
    /**
     * Tests the connection options of the active database.
     */
    public function testConnectionOptions() : void {
        $connection_info = Database::getConnectionInfo('default');
        // Be sure we're connected to the default database.
        $db = Database::getConnection('default', 'default');
        $connectionOptions = $db->getConnectionOptions();
        // In the MySQL driver, the port can be different, so check individual
        // options.
        $this->assertEquals($connection_info['default']['driver'], $connectionOptions['driver'], 'The default connection info driver matches the current connection options driver.');
        $this->assertEquals($connection_info['default']['database'], $connectionOptions['database'], 'The default connection info database matches the current connection options database.');
        // Set up identical replica and confirm connection options are identical.
        Database::addConnectionInfo('default', 'replica', $connection_info['default']);
        $db2 = Database::getConnection('replica', 'default');
        $connectionOptions2 = $db2->getConnectionOptions();
        // Get a fresh copy of the default connection options.
        $connectionOptions = $db->getConnectionOptions();
        $this->assertSame($connectionOptions2, $connectionOptions, 'The default and replica connection options are identical.');
        // Set up a new connection with different connection info.
        $test = $connection_info['default'];
        $test['database'] .= 'test';
        Database::addConnectionInfo('test', 'default', $test);
        $connection_info = Database::getConnectionInfo('test');
        // Get a fresh copy of the default connection options.
        $connectionOptions = $db->getConnectionOptions();
        $this->assertNotEquals($connection_info['default']['database'], $connectionOptions['database'], 'The test connection info database does not match the current connection options database.');
    }
    
    /**
     * Tests per-table prefix connection option.
     */
    public function testPerTablePrefixOption() : void {
        $connection_info = Database::getConnectionInfo('default');
        $new_connection_info = $connection_info['default'];
        $new_connection_info['prefix'] = [
            'default' => $connection_info['default']['prefix'],
            'test_table' => $connection_info['default']['prefix'] . '_bar',
        ];
        Database::addConnectionInfo('default', 'foo', $new_connection_info);
        $this->expectException(\AssertionError::class);
        $foo_connection = Database::getConnection('foo', 'default');
    }
    
    /**
     * Tests the prefix connection option in array form.
     */
    public function testPrefixArrayOption() : void {
        $connection_info = Database::getConnectionInfo('default');
        $new_connection_info = $connection_info['default'];
        $new_connection_info['prefix'] = [
            'default' => $connection_info['default']['prefix'],
        ];
        Database::addConnectionInfo('default', 'foo', $new_connection_info);
        $this->expectException(\AssertionError::class);
        $foo_connection = Database::getConnection('foo', 'default');
    }
    
    /**
     * Ensure that you cannot execute multiple statements in a query.
     */
    public function testMultipleStatementsQuery() : void {
        $this->expectException(\InvalidArgumentException::class);
        Database::getConnection('default', 'default')->query('SELECT * FROM {test}; SELECT * FROM {test_people}');
    }
    
    /**
     * Ensure that you cannot prepare multiple statements.
     */
    public function testMultipleStatements() : void {
        $this->expectException(\InvalidArgumentException::class);
        Database::getConnection('default', 'default')->prepareStatement('SELECT * FROM {test}; SELECT * FROM {test_people}', []);
    }
    
    /**
     * Tests that the method ::condition() returns a Condition object.
     */
    public function testCondition() : void {
        $connection = Database::getConnection('default', 'default');
        $namespace = (new \ReflectionObject($connection))->getNamespaceName() . "\\Condition";
        if (!class_exists($namespace)) {
            $namespace = Condition::class;
        }
        $condition = $connection->condition('AND');
        $this->assertSame($namespace, get_class($condition));
    }
    
    /**
     * Tests that the method ::hasJson() returns TRUE.
     */
    public function testHasJson() : void {
        $this->assertTrue($this->connection
            ->hasJson());
    }

}