/**
 * Verify that transactions can be run on the in-memory storage engine. inMemory transactions are
 * not fully supported, but should work for basic MongoDB user testing.
 *
 * TODO: remove this test when general transaction testing is turned on with the inMemory storage
 * engine (SERVER-36023).
 */
(function() {
"use strict";

if (jsTest.options().storageEngine !== "inMemory") {
    jsTestLog("Skipping test because storageEngine is not inMemory");
    return;
}

const dbName = "test";
const collName = "transactions_work_with_in_memory_engine";

const replTest = new ReplSetTest({name: collName, nodes: 1});
replTest.startSet({storageEngine: "inMemory"});
replTest.initiate();

const primary = replTest.getPrimary();

// Initiate a session.
const sessionOptions = {
    causalConsistency: false
};
const session = primary.getDB(dbName).getMongo().startSession(sessionOptions);
const sessionDb = session.getDatabase(dbName);

// Create collection.
assert.commandWorked(sessionDb[collName].insert({x: 0}));

// Execute a transaction that should succeed.
session.startTransaction();
assert.commandWorked(sessionDb[collName].insert({x: 1}));
assert.commandWorked(session.commitTransaction_forTesting());

session.endSession();
replTest.stopSet();
}());