(function() {
"use strict";

var verifyOutput = function(out) {
    printjson(out);
    assert.commandWorked(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', st.shard1.shardName);
st.adminCommand({shardcollection: "mrShard.srcSharded", key: {"_id": 1}});

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

var bulk = db.srcSharded.initializeUnorderedBulkOp();
for (var j = 0; j < 100; j++) {
    for (var 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
var suffix = "InSharded";

var out = db.srcSharded.mapReduce(map, reduce, "mrBasic" + suffix);
verifyOutput(out);

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

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

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

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

// Ensure that mapReduce with a sharded input collection can accept the collation option.
out = db.srcSharded.mapReduce(map, reduce, {out: {inline: 1}, collation: {locale: "en_US"}});
verifyOutput(out);
assert(out.results != 'undefined', "no results for inline with collation");

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

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

// Ensure that the collation option is propagated to the shards. This uses a case-insensitive
// collation, and the query seeding the mapReduce should only match the document if the
// collation is passed along to the shards.
assert.writeOK(db.srcSharded.remove({}));
assert.eq(db.srcSharded.find().itcount(), 0);
assert.writeOK(db.srcSharded.insert({i: 0, j: 0, str: "FOO"}));
out = db.srcSharded.mapReduce(
    map,
    reduce,
    {out: {inline: 1}, query: {str: "foo"}, collation: {locale: "en_US", strength: 2}});
assert.commandWorked(out);
assert.eq(out.counts.input, 1);
st.stop();
})();