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// @tags: [
// does_not_support_stepdowns,
// sbe_incompatible,
// uses_map_reduce_with_temp_collections,
// ]
/**
* Demonstrate that mapReduce can accept functions represented by strings.
* Some drivers do not have a type which represents a Javascript function. These languages represent
* the arguments to mapReduce as strings.
*/
(function() {
"use strict";
const col = db.function_string_representations;
const out = db.map_reduce_example;
col.drop();
assert.commandWorked(col.insert({
_id: "abc123",
ord_date: new Date("Oct 04, 2012"),
status: 'A',
price: 25,
items: [{sku: "mmm", qty: 5, price: 2.5}, {sku: "nnn", qty: 5, price: 2.5}]
}));
var mapFunction = "function() {emit(this._id, this.price);}";
var reduceFunction = "function(keyCustId, valuesPrices) {return Array.sum(valuesPrices);}";
out.drop();
assert.commandWorked(
col.mapReduce(mapFunction, reduceFunction, {out: {merge: "map_reduce_example"}}));
// Provided strings may end with semicolons and/or whitespace
mapFunction += " ; ";
reduceFunction += " ; ";
out.drop();
assert.commandWorked(
col.mapReduce(mapFunction, reduceFunction, {out: {merge: "map_reduce_example"}}));
// $where exhibits the same behavior
var whereFunction = "function() {return this.price === 25;}";
assert.eq(1, col.find({$where: whereFunction}).itcount());
whereFunction += ";";
assert.eq(1, col.find({$where: whereFunction}).itcount());
// system.js does not need to be tested, as its contents types' are preserved, and
// strings are not promoted into functions.
})();
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