mongo/jstests/sharding/trace_missing_docs_test.js

// Tests tracing where a document was inserted
load('jstests/libs/trace_missing_docs.js');

(function() {
'use strict';

var testDocMissing = function(useReplicaSet) {
    var options = { rs: useReplicaSet,
                    shardOptions: { master: "", oplogSize: 10 },
                    rsOptions: { nodes: 1, oplogSize: 10 } };

    var st = new ShardingTest({ shards: 2, mongos: 1, other: options });

    var mongos = st.s0;
    var coll = mongos.getCollection("foo.bar");
    var admin = mongos.getDB("admin");
    var shards = mongos.getCollection("config.shards").find().toArray();

    assert.commandWorked(admin.runCommand({ enableSharding: coll.getDB() + "" }));
    st.ensurePrimaryShard(coll.getDB() + "", shards[0]._id);

    coll.ensureIndex({ sk: 1 });
    assert.commandWorked(admin.runCommand({ shardCollection: coll + "", key: { sk: 1 } }));

    assert.writeOK(coll.insert({ _id: 12345, sk: 67890, hello: "world" }));
    assert.writeOK(coll.update({ _id: 12345 }, { $set: { baz: 'biz' } }));
    assert.writeOK(coll.update({ sk: 67890 }, { $set: { baz: 'boz' } }));

    assert.commandWorked(admin.runCommand({ moveChunk: coll + "",
                                            find: { sk: 0 },
                                            to: shards[1]._id,
                                            _waitForDelete: true }));

    st.printShardingStatus();

    var ops = traceMissingDoc(coll, { _id: 12345, sk: 67890 });

    assert.eq(ops[0].op, 'i');
    assert.eq(ops.length, 5);

    jsTest.log("DONE! " + (useReplicaSet ? "(using rs)": "(using master/slave)"));

    st.stop();
};

testDocMissing(true);
testDocMissing(false);

})();