transaction-multi-rollback-test.js

#!/usr/bin/env node

/* 
 * Spade, pubsub mode events test.
 */
exports.test = function ( done, assertions ) {

    var debug = !! true
        , emptyFn = function () {}
        , log = console.log
        , dbg = debug ? console.log : emptyFn
        , test_utils = require( './deps/test-utils' )
        , inspect = test_utils.inspect
        , format = test_utils.format
        , Spade = require( '../' )
        , opt = {
            security : {
                '127.0.0.1:6379' : {
                    // disable db selection
                    db : -1
                }
            }
        }
        , client = Spade( opt )
        // expected events
        , evts = []
        // collected events
        , collected = client.logger.collected
        , on = 1
        , exit = typeof done === 'function' ? done : function () {}
        , assert = assertions || require( 'assert' )
        ;
    log( '- a new Spade client was created with custom options:', inspect( opt ) );

    log( '- enable CLI logging.' );

    client.cli( true, function ( ename, args ) {
        dbg( '  !%s %s', ename, format( ename, args || [] ) );
    }, true );

    log( '- opening client connection.' );

    client.connect( null, function () {
        // push expected events
        evts.push( 'connect','scanqueue', 'ready' );

        log( '- execute queue #rollUp.');
        client.queue.rollUp();

        log( '- now client is connected and ready to send.' );
        log( '- #push MULTI, PING, TIME.' );

        // push expected events
        evts.push( 'reply', 'reply', 'reply' );

        client.commands.multi();

        client.commands.ping();

        client.commands.time( function () {
            // simulate an accidental client disconnection, after TIME 1st execution
            if ( on ) {
                // re-push expected events for rollbacks
                evts.push('offline', 'attempt', 'connect', 'scanqueue', 'ready' );
                evts.push( 'reply', 'reply', 'reply' );
                client.socket.end();
                return on = 0;
            }

            log( '- now send EXEC.' );

            // push expected events
            evts.push( 'reply' );

            client.commands.exec( function ( is_err, reply, fn ) {

                log( '- check results for the EXEC reply.' );

                assert.ok( fn( reply )[ 0 ] === 'PONG' );
                assert.ok( fn( reply )[ 1 ].length === 2 );

                // push expected events
                evts.push( 'error-reply' );

                client.commands.exec( function ( is_err, reply, fn ) {
                    log( '- 2nd EXEC should get an -ERR reply.' );
                    assert.ok( is_err );
                } );

            } );

        } );

    } );

    log( '- now waiting 4 secs to collect events..' );

    setTimeout( function () {

        log( '- now disconnecting client with QUIT.' );

        // push expected connection event
        evts.push( 'reply', 'offline', 'lost' );

        client.commands.quit( function ( is_err, reply, fn ) {
            log( '- QUIT callback.', fn( reply ) );
            assert.ok( fn( reply )[ 0 ] === 'OK' );
            log( '- OK, client was disconnected.' );
        } );

        setTimeout( function () {

            log( '- check collected events for client, should be:', inspect( evts ) );
            assert.deepEqual( collected.events, evts, 'got: ' + inspect( collected.events ) );

            exit();

        }, 1000 );

    }, 4000 );

};

// single test execution with node
if ( process.argv[ 1 ] === __filename ) exports.test = exports.test();