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/**
* Reproducer for WT-7912. WT-7912 describes a scenario where the prefix_search mechanism added in
* WT-7264 could result in duplicate values in a collection backed by a unique index.
*
* @tags: [
* # This test performs a lot of inserts. Using transactions slows this workload down greatly.
* # Transactions are not necessary for this reproducer.
* does_not_support_transactions
* ]
*/
"use strict";
var $config = (function() {
const initData = {
getCollectionName: function(collName) {
return "insert_duplicates_unique_index_" + collName;
},
getCollection: function(db, collName) {
return db.getCollection(this.getCollectionName(collName));
},
};
const states = {
init: function init(db, collName) {
const coll = this.getCollection(db, collName);
for (let i = 0; i < 100; i++) {
const res = coll.insert({t: this.tid, i: i});
assertAlways.commandWorked(res);
assertAlways.eq(1, res.nInserted, tojson(res));
}
},
/**
* Attempts to insert a duplicate document.
*/
insertDup: function insertDup(db, collName) {
const coll = this.getCollection(db, collName);
for (let i = 0; i < 100; i++) {
const res = coll.insert({t: this.tid, i: i});
assertAlways.commandFailedWithCode(res, ErrorCodes.DuplicateKey);
assertAlways.eq(0, res.nInserted, tojson(res));
}
}
};
function setup(db, collName) {
collName = this.getCollectionName(collName);
assertAlways.commandWorked(db.createCollection(collName));
assertAlways.commandWorked(
db.getCollection(collName).createIndex({t: 1, i: 1}, {unique: true}));
}
const transitions = {
init: {insertDup: 1.0},
insertDup: {insertDup: 1.0},
};
return {
threadCount: 10,
iterations: 100,
startState: 'init',
states: states,
data: initData,
transitions: transitions,
setup: setup
};
})();
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