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// Test basic transaction write ops, reads, and commit/abort using the shell helper.
// @tags: [uses_transactions, uses_snapshot_read_concern]
(function() {
"use strict";
const dbName = "test";
const collName = "multi_transaction_test_using_api";
const testDB = db.getSiblingDB(dbName);
testDB.runCommand({drop: collName, writeConcern: {w: "majority"}});
assert.commandWorked(testDB.runCommand({create: collName, writeConcern: {w: "majority"}}));
const sessionOptions = {causalConsistency: false};
const session = testDB.getMongo().startSession(sessionOptions);
const sessionDb = session.getDatabase(dbName);
const sessionColl = sessionDb.getCollection(collName);
//
// Test that calling abortTransaction as the first statement in a transaction is allowed and
// modifies the state accordingly.
//
jsTestLog("Call abortTransaction as the first statement in a transaction");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
// Successfully call abortTransaction.
assert.commandWorked(session.abortTransaction_forTesting());
//
// Test that calling commitTransaction as the first statement in a transaction is allowed and
// modifies the state accordingly.
//
jsTestLog("Call commitTransaction as the first statement in a transaction");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
// Successfully call commitTransaction.
session.commitTransaction();
jsTestLog("Run CRUD ops, read ops, and commit transaction.");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
// Performing a read first should work when snapshot readConcern is specified.
assert.docEq(null, sessionColl.findOne({_id: "insert-1"}));
assert.commandWorked(sessionColl.insert({_id: "insert-1", a: 0}));
assert.commandWorked(sessionColl.insert({_id: "insert-2", a: 0}));
assert.commandWorked(sessionColl.insert({_id: "insert-3", a: 0}));
assert.commandWorked(sessionColl.update({_id: "insert-1"}, {$inc: {a: 1}}));
assert.commandWorked(sessionColl.deleteOne({_id: "insert-2"}));
sessionColl.findAndModify({query: {_id: "insert-3"}, update: {$set: {a: 2}}});
// Try to find a document within a transaction.
let cursor = sessionColl.find({_id: "insert-1"});
assert.docEq({_id: "insert-1", a: 1}, cursor.next());
assert(!cursor.hasNext());
// Try to find a document using findOne within a transaction
assert.eq({_id: "insert-1", a: 1}, sessionColl.findOne({_id: "insert-1"}));
// Find a document with the aggregation shell helper within a transaction.
cursor = sessionColl.aggregate({$match: {_id: "insert-1"}});
assert.docEq({_id: "insert-1", a: 1}, cursor.next());
assert(!cursor.hasNext());
session.commitTransaction();
// Make sure the correct documents exist after committing the transaciton.
assert.eq({_id: "insert-1", a: 1}, sessionColl.findOne({_id: "insert-1"}));
assert.eq({_id: "insert-3", a: 2}, sessionColl.findOne({_id: "insert-3"}));
assert.eq(null, sessionColl.findOne({_id: "insert-2"}));
jsTestLog("Insert a doc and abort transaction.");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
assert.commandWorked(sessionColl.insert({_id: "insert-4", a: 0}));
assert.commandWorked(session.abortTransaction_forTesting());
// Verify that we cannot see the document we tried to insert.
assert.eq(null, sessionColl.findOne({_id: "insert-4"}));
jsTestLog("Bulk insert and update operations within transaction.");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
let bulk = sessionColl.initializeUnorderedBulkOp();
bulk.insert({_id: "bulk-1"});
bulk.insert({_id: "bulk-2"});
bulk.find({_id: "bulk-1"}).updateOne({$set: {status: "bulk"}});
bulk.find({_id: "bulk-2"}).updateOne({$set: {status: "bulk"}});
assert.commandWorked(bulk.execute());
session.commitTransaction();
assert.eq({_id: "bulk-1", status: "bulk"}, sessionColl.findOne({_id: "bulk-1"}));
assert.eq({_id: "bulk-2", status: "bulk"}, sessionColl.findOne({_id: "bulk-2"}));
jsTestLog("Bulk delete operations within transaction.");
session.startTransaction({readConcern: {level: "snapshot"}, writeConcern: {w: "majority"}});
bulk = sessionColl.initializeUnorderedBulkOp();
bulk.find({_id: "bulk-1"}).removeOne();
bulk.find({_id: "bulk-2"}).removeOne();
assert.commandWorked(bulk.execute());
session.commitTransaction();
assert.eq(null, sessionColl.findOne({_id: "bulk-1"}));
assert.eq(null, sessionColl.findOne({_id: "bulk-2"}));
session.endSession();
}());
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