mongodb/jstests/repl/repl1.js

// Test basic replication functionality
//
// There is no automatic fail-over in a master/slave deployment, so if the master goes down, no new
// master will be elected. Therefore if the master is using an ephemeral storage engine, it cannot
// be restarted without losing all data. This test expects that restarting the master will maintain
// the node's data, so cannot be run with ephemeral storage engines.
// @tags: [requires_persistence]

var baseName = "jstests_repl1test";

soonCount = function(count) {
    assert.soon(function() {
        //                print( "check count" );
        //                print( "count: " + s.getDB( baseName ).z.find().count() );
        return s.getDB(baseName).a.find().count() == count;
    });
};

doTest = function(signal) {

    rt = new ReplTest("repl1tests");

    m = rt.start(true);
    s = rt.start(false);

    am = m.getDB(baseName).a;

    for (i = 0; i < 1000; ++i)
        am.save({_id: new ObjectId(), i: i});

    soonCount(1000);
    as = s.getDB(baseName).a;
    assert.eq(1, as.find({i: 0}).count());
    assert.eq(1, as.find({i: 999}).count());

    rt.stop(false, signal);

    for (i = 1000; i < 1010; ++i)
        am.save({_id: new ObjectId(), i: i});

    s = rt.start(false, null, true);
    soonCount(1010);
    as = s.getDB(baseName).a;
    assert.eq(1, as.find({i: 1009}).count());

    rt.stop(true, signal);

    m = rt.start(true, null, true);
    am = m.getDB(baseName).a;

    for (i = 1010; i < 1020; ++i)
        am.save({_id: new ObjectId(), i: i});

    assert.soon(function() {
        return as.find().count() == 1020;
    });
    assert.eq(1, as.find({i: 1019}).count());

    assert.automsg("m.getDB( 'local' ).getCollection( 'oplog.$main' ).stats().size > 0");

    rt.stop();
};

doTest(15);  // SIGTERM