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// @tags: [
// # mapReduce does not support afterClusterTime.
// does_not_support_causal_consistency,
// does_not_support_stepdowns,
// ]
t = db.mr3;
t.drop();
t.save({x: 1, tags: ["a", "b"]});
t.save({x: 2, tags: ["b", "c"]});
t.save({x: 3, tags: ["c", "a"]});
t.save({x: 4, tags: ["b", "c"]});
m = function(n, x) {
x = x || 1;
this.tags.forEach(function(z) {
for (var i = 0; i < x; i++)
emit(z, {count: n || 1});
});
};
r = function(key, values) {
var total = 0;
for (var i = 0; i < values.length; i++) {
total += values[i].count;
}
return {count: total};
};
res = t.mapReduce(m, r, {out: "mr3_out"});
z = res.convertToSingleObject();
assert.eq(3, Object.keySet(z).length, "A1");
assert.eq(2, z.a.count, "A2");
assert.eq(3, z.b.count, "A3");
assert.eq(3, z.c.count, "A4");
res.drop();
res = t.mapReduce(m, r, {out: "mr3_out", mapparams: [2, 2]});
z = res.convertToSingleObject();
assert.eq(3, Object.keySet(z).length, "B1");
assert.eq(8, z.a.count, "B2");
assert.eq(12, z.b.count, "B3");
assert.eq(12, z.c.count, "B4");
res.drop();
// -- just some random tests
realm = m;
m = function() {
emit(this._id, 1);
};
res = t.mapReduce(m, r, {out: "mr3_out"});
res.drop();
m = function() {
emit(this._id, this.xzz.a);
};
before = db.getCollectionNames().length;
assert.throws(function() {
t.mapReduce(m, r, {out: "mr3_out"});
});
assert.eq(before, db.getCollectionNames().length, "after throw crap");
m = realm;
r = function(k, v) {
return v.x.x.x;
};
before = db.getCollectionNames().length;
assert.throws(function() {
t.mapReduce(m, r, "mr3_out");
});
assert.eq(before, db.getCollectionNames().length, "after throw crap");
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