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// Test that MapReduce only runs when certain arguments are explicit null. This is required because
// the Java Driver adds null as an argument to these fields if they are missing in the command from
// the user.
// @tags: [
// # mapReduce does not support afterClusterTime.
// does_not_support_causal_consistency,
// does_not_support_stepdowns,
// uses_map_reduce_with_temp_collections,
// ]
(function() {
"use strict";
const coll = db.mr_null_test;
const outColl = db.mr_null_test_out;
assert.commandWorked(coll.insert({val: 1}));
function mapFunc() {
emit(this.val, 1);
}
function reduceFunc(k, v) {
return Array.sum(v);
}
// Test that finalize can be explicit null.
assert.commandWorked(db.runCommand({
mapReduce: coll.getName(),
map: mapFunc,
reduce: reduceFunc,
finalize: null,
out: {merge: outColl.getName()}
}));
// Test that query can be explicit null.
assert.commandWorked(db.runCommand({
mapReduce: coll.getName(),
map: mapFunc,
reduce: reduceFunc,
query: null,
out: {merge: outColl.getName()}
}));
// Test that sort can be explicit null.
assert.commandWorked(db.runCommand({
mapReduce: coll.getName(),
map: mapFunc,
reduce: reduceFunc,
sort: null,
out: {merge: outColl.getName()}
}));
// Test that scope can be explicit null.
assert.commandWorked(db.runCommand({
mapReduce: coll.getName(),
map: mapFunc,
reduce: reduceFunc,
scope: null,
out: {merge: outColl.getName()}
}));
})();
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