mongo/jstests/replsets/replset7.js

// test for SERVER-5040 - if documents move forward during an initial sync.

var rt = new ReplSetTest( { name : "replset7tests" , nodes: 1 } );

var nodes = rt.startSet();
rt.initiate();
var master = rt.getPrimary();

var md = master.getDB( 'd' );
var mdc = md[ 'c' ];

// prep the data
var doccount = 5000;
var bulk = mdc.initializeUnorderedBulkOp();
for( i = 0; i < doccount; ++i ) {
    bulk.insert( { _id:i, x:i } );
}
assert.writeOK(bulk.execute());

assert.commandWorked(mdc.ensureIndex( { x : 1 }, { unique: true } ));

// add a secondary
var slave = rt.add();
rt.reInitiate();
print ("initiation complete!");
var sc = slave.getDB( 'd' )[ 'c' ];
slave.setSlaveOk();

// Wait for slave to start cloning.
//assert.soon( function() { c = sc.find( { _id:1, x:1 } ); print( c ); return c > 0; } );


// Move all documents to the end by growing it
bulk = mdc.initializeUnorderedBulkOp();
var bigStr = "ayayayayayayayayayayayayayayayayayayayayayayayayayayayayayayayayay" +
        "ayayayayayayayayayayayay";
for (i = 0; i < doccount; ++i) {
    bulk.find({ _id: i, x: i }).remove();
    bulk.insert({ _id: doccount + i, x: i, bigstring: bigStr  });
}
assert.writeOK(bulk.execute());

// Wait for replication to catch up.
rt.awaitSecondaryNodes();

// Do we have an index?
assert.eq(1, slave.getDB( 'd' )['c'].getIndexes().filter(function (doc) {
    return (doc.v === 1
            && JSON.stringify(doc.key) === JSON.stringify({x: 1})
            && doc.ns === 'd.c'
            && doc.name === 'x_1');
}).length);