var verifyOutput = function(out) {
    printjson(out);
    assert.eq(out.counts.input, 51200, "input count is wrong");
    assert.eq(out.counts.emit, 51200, "emit count is wrong");
    assert.gt(out.counts.reduce, 99, "reduce count is wrong");
    assert.eq(out.counts.output, 512, "output count is wrong");
};

var st = new ShardingTest(
    {shards: 2, verbose: 1, mongos: 1, other: {chunkSize: 1, enableBalancer: true}});

st.adminCommand({enablesharding: "mrShard"});
st.ensurePrimaryShard('mrShard', 'shard0001');
st.adminCommand({shardcollection: "mrShard.srcSharded", key: {"_id": 1}});

var db = st.getDB("mrShard");

var bulk = db.srcSharded.initializeUnorderedBulkOp();
for (j = 0; j < 100; j++) {
    for (i = 0; i < 512; i++) {
        bulk.insert({j: j, i: i});
    }
}
assert.writeOK(bulk.execute());

function map() {
    emit(this.i, 1);
}
function reduce(key, values) {
    return Array.sum(values);
}

// sharded src sharded dst
var suffix = "InShardedOutSharded";

var out =
    db.srcSharded.mapReduce(map, reduce, {out: {replace: "mrReplace" + suffix, sharded: true}});
verifyOutput(out);

out = db.srcSharded.mapReduce(map, reduce, {out: {merge: "mrMerge" + suffix, sharded: true}});
verifyOutput(out);

out = db.srcSharded.mapReduce(map, reduce, {out: {reduce: "mrReduce" + suffix, sharded: true}});
verifyOutput(out);

out = db.srcSharded.mapReduce(map, reduce, {out: {inline: 1}});
verifyOutput(out);
assert(out.results != 'undefined', "no results for inline");

out = db.srcSharded.mapReduce(
    map, reduce, {out: {replace: "mrReplace" + suffix, db: "mrShardOtherDB", sharded: true}});
verifyOutput(out);

out = db.runCommand({
    mapReduce: "srcSharded",  // use new name mapReduce rather than mapreduce
    map: map,
    reduce: reduce,
    out: "mrBasic" + "srcSharded",
});
verifyOutput(out);