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/**
* Tests that rolling back prepared transactions does not lead to prepare conflicts. These may
* occur while writing out rollback data files for ops that were done outside of those
* transactions but are in conflict with their contents. However, since we abort prepared
* transactions on rollback, such prepare conflicts would be unnecessary. This test therefore
* verifies that they do not happen.
*
* @tags: [uses_transactions, uses_prepare_transaction]
*/
(function() {
"use strict";
load("jstests/core/txns/libs/prepare_helpers.js");
load("jstests/replsets/libs/rollback_test.js");
const name = "rollback_files_no_prepare_conflicts";
const dbName = "test";
const collName = name;
const rollbackTest = new RollbackTest(name);
let primary = rollbackTest.getPrimary();
let testDB = primary.getDB(dbName);
let testColl = testDB.getCollection(collName);
jsTestLog("Issue an insert that will be common to both nodes.");
assert.commandWorked(testColl.insert({_id: 42, a: "one"}));
rollbackTest.transitionToRollbackOperations();
const session = primary.startSession();
const sessionDB = session.getDatabase(dbName);
const sessionColl = sessionDB.getCollection(collName);
jsTestLog("Make an update to that document outside of a transaction on the rollback node.");
assert.commandWorked(testColl.update({_id: 42, a: "one"}, {_id: 42, a: "two"}));
session.startTransaction();
jsTestLog("Update the same document on the same node, this time as part of a transaction.");
assert.commandWorked(sessionColl.update({_id: 42, a: "two"}, {_id: 42, a: "three"}));
jsTestLog("Prepare the transaction on the rollback node.");
PrepareHelpers.prepareTransaction(session, {w: 1});
rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
rollbackTest.transitionToSteadyStateOperations();
jsTestLog("Verify that the document is in the same state as it was at the common point.");
primary = rollbackTest.getPrimary();
testDB = primary.getDB(dbName);
testColl = testDB.getCollection(collName);
assert.docEq({_id: 42, a: "one"}, testColl.findOne({_id: 42}));
rollbackTest.stop();
})();
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