58 lines
1.9 KiB
JavaScript
58 lines
1.9 KiB
JavaScript
'use strict';
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/**
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* remove_single_document.js
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*
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* Repeatedly remove a document from the collection.
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*/
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var $config = (function() {
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var states = {
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remove: function remove(db, collName) {
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// try removing a random document
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var res = this.doRemove(db, collName, {rand: {$gte: Random.rand()}}, {justOne: true});
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assertAlways.lte(res.nRemoved, 1);
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if (res.nRemoved === 0) {
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// The above remove() can fail to remove a document when the random value
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// in the query is greater than any of the random values in the collection.
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// When that situation occurs, just remove an arbitrary document instead.
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res = this.doRemove(db, collName, {}, {justOne: true});
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assertAlways.lte(res.nRemoved, 1);
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}
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this.assertResult(res);
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}
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};
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var transitions = {remove: {remove: 1}};
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function setup(db, collName, cluster) {
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// insert enough documents so that each thread can remove exactly one per iteration
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var num = this.threadCount * this.iterations;
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for (var i = 0; i < num; ++i) {
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db[collName].insert({i: i, rand: Random.rand()});
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}
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assertWhenOwnColl.eq(db[collName].find().itcount(), num);
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}
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return {
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threadCount: 10,
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iterations: 20,
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states: states,
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transitions: transitions,
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setup: setup,
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data: {
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doRemove: function doRemove(db, collName, query, options) {
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return db[collName].remove(query, options);
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},
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assertResult: function assertResult(res) {
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assertAlways.writeOK(res);
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// when running on its own collection,
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// this iteration should remove exactly one document
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assertWhenOwnColl.eq(1, res.nRemoved, tojson(res));
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}
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},
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startState: 'remove'
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};
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})();
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